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Audio/Video Gear and Systems => Owner's Circles => Virtue Audio Owners => Topic started by: justplainmike on 28 Jun 2010, 03:46 am

Title: One.2 Questions
Post by: justplainmike on 28 Jun 2010, 03:46 am
Hi All,

    I've been lurking in the forums for quite some time.  Seth, I've read alot of your posts, seen your website and the reviews of your product.  You seem like someone who treats their work as a labor of love and I really respect that.  I'm also impressed with and appreciative of the many posters who take their time and answer questions here with knowledge and enthusiasm.  So thanks to everyone on the forum.

    I've been on a Tripath kick lately.  But I sold my Sonic Impact Super T amp to upgrade to the new DTA-100 (50...er more like 30 real undistorted watts per channel).  I running a Squeezebox 3 coax out to an Audio-Gd headphone/pre-amp out to some Axiom Audio M3 Ti's and a small powered subwoofer (Mirage S8).   

    I had the amp running out to the high level inputs into the sub and then out to the speakers. 
This was sounding really pretty good.  Powerwise it was a step up from the Sonic Super T-amp.  Sound quality was decent but I wouldn't say better then the Super T. 

    It's a moot point now.  My amp died yesterday.  I'm going to get an RMA and send it back.  But I'm not sure I want a replacement.  I've been coveting a Virtue amp for awhile now but haven't wanted to spend the money on one.  Not that they aren't worth it.  I just didn't want to commit the money to my bedroom setup.

    I'm thinking of getting a One.2.  I like that it has a nice stepped attenuator (I can run it from the DAC out of my Compass and just have one volume pot in the pathway).  I also really want a line level Sub output (AND the 80hz cutoff).  The price is a little higher than what I want to go, but after reading the forums and the website for too long already, I'm prepared to cave...Seth, again, I think your prices are more than fair..I'm just cheap and fresh outta school! 
   
    So this brings me to a couple of questions:
1.  How many watts into 8ohms am I going to get with the stock power supply?With the 30v/130watt supply?
2.  Will either output give decently loud sound in a bedroom that's ~12x14x8-12ft sloped ceiling?

Anyhow, any help on this will be appreciated.  Thanks again for everyone's time and enjoy your Virtue amps!!

Mike 
Title: Re: One.2 Questions
Post by: srb on 28 Jun 2010, 04:00 am
    I had the amp running out to the high level inputs into the sub and then out to the speakers. 
    It's a moot point now.  My amp died yesterday.

I thought that all Tripath amplifier speaker outputs had a floating non-common ground, and that you couldn't connect them to common ground subwoofer speaker level inputs.  But I also thought that would result in an immediate short circuit rather than normal operation followed by amplifier failure sometime later.
 
Steve
Title: Re: One.2 Questions
Post by: virtue on 28 Jun 2010, 04:16 am
Hehe, hey Mike, how are you?

I've only had one customer who migrated from the DTA-100.  He said he was getting twice the output with the same PSU using our amp and that they were "SO not in the same league."  I know that I pay more for assembly than PE pays for the entire amp, including power supply.  So PE really has some market power but while they make some great products, this is not one of them.

The short answer is that the small supply works fine and will give you around 30wpc @ 8 ohms, I think.  You'll get up around 40wpc with the 30/130w supply @ 8 ohms.  Here are the measurements:

http://store.virtueaudio.com/PhotoGallery.asp?ProductCode=VRTU%2DIA%2DVAONE%2E2%2DPBF%2D1&PhotoNumber=5

So, welcome aboard.  Start small and upgrade your PSU as your fortunes improve!

Title: Re: One.2 Questions
Post by: justplainmike on 28 Jun 2010, 04:16 am
Well, I'm wondering if that's the case too.  The amp ran like a champ for about a week.  Then in the middle of a song just died.  It's definitely an argument for a line level sub output huh? :-)
Title: Re: One.2 Questions
Post by: virtue on 28 Jun 2010, 04:22 am
If the high-level sub were the issue, it would have blown immediately I think.

If you've opened up that amp you'll see that the quality is only skin-deep.  The PCB is quite simply a piece of crap - just terrible engineering and construction. 

I heard that Hilly makes it but I could be wrong.
Title: Re: One.2 Questions
Post by: justplainmike on 28 Jun 2010, 04:39 am
Hi Seth and Steve,

   Thanks for the replies.  I hope it wasn't the high level output to the sub from the amp that killed it.  And I hope my sub is still ok come to think of it.  While my Super T-amp didn't have the highest quality fit and finish, my DTA-100 was really kind of cheap feeling by comparison.  I thought it wouldn't matter what the outside looked like...it was going in a cabinet to be heard and not seen.  I love the tripath sound but I don't think I'm going to get it w/the DTA-100...sooo RMA and refund time I think. :-)
    I also think that if I can get close to the output from a One.2 with the stock PSU and the owner of the company replies to my message on the forum, then it's worth a shot!  Making my order now.  Thanks again!

Mike
Title: Re: One.2 Questions
Post by: ltr317 on 28 Jun 2010, 05:09 am
Hi Mike,

I'm been testing a Sensation M451 with several different power supplies that Seth loan me, and the smallest 24v/65 watt ps plays plenty loud with my 92 db sensitive speakers in my bedroom system.  My bedroom is 13x14x10 which is similar in size to your room.  I don't know the sensitivity of your speakers, but you can use my measurements as a guideline. 

Btw, I've heard either the original Sonic T, Super T and Trends amps many times in different systems.  At best, they are okay but really lack the refinement of the better tripath and other digital switching amps, especially if you have good resolving associated equipment.  I often heard grittiness, veiling and lack of fine detail with the Sonic and Trends amps.  For the money and some situations they do the job, but if one wants them to be part of a hi-end sounding system then they fall short.  One doesn't need to spend a lot of money to achieve good sound, but unfortunately there is a minimum amount one must spend to get to that level. 

Cheers,
Paul
Title: Re: One.2 Questions
Post by: justplainmike on 28 Jun 2010, 05:35 am
Hi Paul,

Well, we'll find out.  I just pulled the trigger on a One.2...white finish :-).  Going for the stock PSU right now.  Will probably upgrade to either battery or the 30v/130w supply when I figure out which will work best for me.  For now, I'll be counting down the days until it gets here!!  Can't wait to be a part of the club here :-)  Cheers!

Mike
Title: Re: One.2 Questions
Post by: eclein on 28 Jun 2010, 12:42 pm
Mike..
 Welcome aboard!!! These little babies just sound awesome..I think you'll like the ONE.2!!! :thumb: :thumb:
 Ed
Title: Re: One.2 Questions
Post by: jtwrace on 28 Jun 2010, 01:07 pm
Hi Paul,

Well, we'll find out.  I just pulled the trigger on a One.2...white finish :-).  Going for the stock PSU right now.  Will probably upgrade to either battery or the 30v/130w supply when I figure out which will work best for me.  For now, I'll be counting down the days until it gets here!!  Can't wait to be a part of the club here :-)  Cheers!

Mike

Mike,

I think you're going to be VERY happy with your purchase.  These are really sweet!   :thumb:
Title: Re: One.2 Questions
Post by: justplainmike on 28 Jun 2010, 02:19 pm
"If you went with the stock battery supply, you're only tapping into a fraction of what the amp has to offer. The better the power supply, the better the sound of the amp. You're still going to love your new amp.  zman"  hi zman,  I'm looking forward to upgrading down the road.  Just want to get started and hear what the stock configuration sounds like.  I'll be bugging the forum members in due time about batteries vs. psu vs linear supplies!  Can't wait to tinker!   
Title: Re: One.2 Questions
Post by: CSI on 28 Jun 2010, 05:11 pm
I also ordered my new Two.2 with the standard PS for openers. I want to see what all the shouting is about before upgrading. I expect I will eventually opt for either JT's switching supply or the Red Wine Black Lightning but first I want to get it broken in and compare it to my other amp, my beloved Khartago. I'll write up my impressions as well in due course. The Virtue is due this Friday.
Title: Re: One.2 Questions
Post by: brother love on 28 Jun 2010, 07:39 pm
...The short answer is that the small supply works fine and will give you around 30wpc @ 8 ohms, I think.  You'll get up around 40wpc with the 30/130w supply @ 8 ohms.  Here are the measurements:

http://store.virtueaudio.com/PhotoGallery.asp?ProductCode=VRTU%2DIA%2DVAONE%2E2%2DPBF%2D1&PhotoNumber=5

Seth, the Virtue Audio website is a bit confusing to me re: One.2 wattage #'s ...

One.2  description features bullet item says "max 30v 87 wpc @ 4 ohms" ; then power specs just below that show "30v/130w 55wpc/ 90w+ mono"

Sensation & Virtue amp table repeats "max RMS @ 4 ohms**  87 wpc"

Footnote then states:

"** Power is approximately half (44 wpc) into 8 ohms. With the 130w supply, you will achieve max output into 8 ohms."

Can you clarify this?  Is it peak power vs. continuous power?

I remember in Circuits class that E= IR & P= VI, but I can't reconcile the #'s based on the data above.  Then again, I'm an ME, not an EE.  :lol:
Title: Re: One.2 Questions
Post by: justplainmike on 28 Jun 2010, 07:44 pm
I also ordered my new Two.2 with the standard PS for openers. I want to see what all the shouting is about before upgrading. I expect I will eventually opt for either JT's switching supply or the Red Wine Black Lightning but first I want to get it broken in and compare it to my other amp, my beloved Khartago. I'll write up my impressions as well in due course. The Virtue is due this Friday.

I'll look forward to reading your impressions as well.  Any reason you're leaning only towards battery power?  Thanks.
Title: Re: One.2 Questions
Post by: CSI on 28 Jun 2010, 08:11 pm
"I'll look forward to reading your impressions as well.  Any reason you're leaning only towards battery power?  Thanks".

Thanks for asking.

I'm not. The JT PS I meant to refer to is the linear Antek listed on the Virtue site so it will likely be battery vs. powered PS when (if?) I upgrade. I'm taking my cue here from James who has lived with both (though not used with a Two.2 specifically). He loves them both but for different reasons. In his set up, the Red Wine battery unit sounded more solid ("center of the earth solid" was his phrase) with the blackest background. The JT unit was perhaps slightly livelier. Seth also seems to prefer the JT. To me, without having heard either of them yet, this sounds like two flavors of good. Having experience with battery products from both Gary Dodd and Vinnie Rossi I'm a firm believer in getting off the grid whenever possible. However, high efficiency speakers and dirty AC power (neither one an issue in my system) could be the determining factor. That and cost. I haven't always been able to afford the Red Wine Audio stuff but it has always been worth it when I've stepped up to the bar. I will never give up my Isabellina.

So it will be personal preference, synergy and budget that determines the case for me.
Title: Re: One.2 Questions
Post by: justplainmike on 29 Jun 2010, 05:32 am

 However, high efficiency speakers and dirty AC power (neither one an issue in my system) could be the determining factor. That and cost. I haven't always been able to afford the Red Wine Audio stuff but it has always been worth it when I've stepped up to the bar. I will never give up my Isabellina.

So it will be personal preference, synergy and budget that determines the case for me.

What's considered high efficiency in a speaker?  Greater than 95db/w/m?  I love the sound of my Axiom's but they're only between 89-92db (anechoic vs room) sensitive...middle of the road from what I'm able to surmise.  My guess is that I'll get more initially out of just cutting off at 80hz and running the line level to my sub.  But, if I had to choose, I think I'd go for the black background.  My first dabble in "bang for the buck low-fi" was a Panny XR-55 and what struck me initially was the completely black noise floor. 

Who knows?  Maybe I'll end up trying both and selling one on the forum or Audiogon :-)

Counting down the days!

Mike
Title: Re: One.2 Questions
Post by: virtue on 29 Jun 2010, 07:09 am
Re: brother love... sorry for the confusing stats.

You'll get 87 wpc @ 4 ohms using a 30v high-current supply.  You can't practically do this using batteries since a 24v battery pack only gives you around 27v.  The JT or Astron supplies will give you 30v.  But many customers have noticed that the extra 3v don't mean much.

With 8 ohms, you get around half that and the 30v/130w supply will give you all the current you need to hit the ceiling.
Title: Re: One.2 Questions
Post by: CSI on 29 Jun 2010, 08:20 pm
What's considered high efficiency in a speaker?  Greater than 95db/w/m?  I love the sound of my Axiom's but they're only between 89-92db (anechoic vs room) sensitive...middle of the road from what I'm able to surmise.  My guess is that I'll get more initially out of just cutting off at 80hz and running the line level to my sub.  But, if I had to choose, I think I'd go for the black background.  My first dabble in "bang for the buck low-fi" was a Panny XR-55 and what struck me initially was the completely black noise floor. 

Who knows?  Maybe I'll end up trying both and selling one on the forum or Audiogon :-)

Counting down the days!

Mike

There's no hard and fast rule for published speaker efficiency specs. Mine are considered medium at 86 dB and play plenty loud in my small room with anything over 35 watts. In comparison, I'd think yours could be considered high efficiency. All things remaining equal, lowering speaker sensitivity by 3 dB will require twice the amp power to get to the same output level. However, room size, taste in volume level, etc. will play a huge roll. The relevancy to power supplies has to do with signal to noise ratio. Because they are off the grid, battery supplies are dead silent - no noise from the power line of course, and no noise from internal parts. All AC powered PS will have some residual noise and if you have dirty AC power that can show up in the audio as well (this is a big problem for exhibitors at shows). As speaker efficiency goes up (and you need less power to get to a certain volume) the percentage of noise in the signal (which tends to be a fixed value as opposed to the variable audio signal) can get high enough to be audible from your seating position. It usually won't but it can. So we won't know for sure until we try them in our systems. In addition, there is something about the dead silent background of a battery supply that is very appealing - even if the powered alternative is perfectly OK. On the other hand, with the Virtue amps some people have found the powered supply to be a bit more "lively" or "airy". I won't know if this is the way to go in my system (and for my tastes) until I try it. I know that a lot of people have fallen in love with these things using the standard PS so I can't imagine the upgrade supply vs. battery is a major issue in any case.

Bill
Title: Re: One.2 Questions
Post by: justplainmike on 30 Jun 2010, 03:38 am
Thanks Bill :-)  That was great info.  Since I've been reading about the good reports from the 80hz bypass I've been even more excited about the One.2.  I think not having to feed the lower frequencies will really bring out what the Axioms have to offer.  I'll make sure to do a full review.  Thanks again to everyone who's shared their thoughts and advice.  Cheers!!

Mike
Title: Re: One.2 Questions
Post by: justplainmike on 8 Jul 2010, 03:55 pm
Hi All,

Thanks again for all the great info and advice here on the forums. 

I got my One.2 last night and hooked it up when I got home.  Here's my setup:

Squeezebox 3--->Audio-Gd Headphone Amp/Dac/Pre w/line level output to--->One.2---> Axiom M3 Ti's and Mirage S8 subwoofer.

Setup is in my bedroom which is about 14x16ft w/vaulted ceiling ~8-14ft high (highest part above speakers and lowest part above bed/listening position.

Initial Impressions:
Amp is working fine and I'm getting good sound out right now.  Did a little listening last night and it's definitely an improvement over my previous DTA-100 and Sonic Impact Super T-amps.    I haven't done the 80hz crossover change yet (couldn't find an Allen wrench  :scratch: ).  Will be doing that in the next couple of days.  Debating burning in the amp and doing some initial listening first vs. doing the switch now.

I'll be doing a more in depth review with some pics as I get some more burn in time on the amp and have some time to listen critically, but so far so good!!  Thanks again everyone!

Mike
Title: Re: One.2 Questions
Post by: eclein on 8 Jul 2010, 05:16 pm
FWIW...I couldn't find an allen key either so I did the burn in thing for a week or so then switched the jumpers-if you have a walmart handy they actually have a set of both allen key measures for a $1..thats right a buck..two keyrings with both types of complete set.
Enjoy and remember it only gets better and better....took me from Friday PM until Sunday PM to really hear it start to open up... :thumb:
Title: Re: One.2 Questions
Post by: justplainmike on 13 Jul 2010, 03:51 am
Ok...finally did the 80hz switch.  I was liking the sound without the crossover and, initially, the sound afterwards was....strange.  I had to do quite a bit of fiddling w/the subwoofer.  It seems turning off high pass was most important.  But I also needed to adjust the volume and phase too.
This took a few hours of fiddling and listening.  But now....

I'm in audio bliss....SO loving the expansion of the soundstage and the tremendous headroom that came with allowing my mains to handle the higher freq's and getting the sub blended just right...well, better blended.  I'll be continuing to futz with it for awhile longer.

This isn't my full review yet.  I'll be doing a bit more tweaking and going through a HUGE part of my music files in the next week or so...but I'll be posting the review here and AVS as soon as it's written.  So excited about my little One.2!!! 

p.s.  I disabled the Blue LED on the front when I did the crossover adjustment...just didn't plug it back in....and I can sleep again!   Seth, seriously...you can see that LED from SPACE!!  :o
Title: Re: One.2 Questions
Post by: virtue on 13 Jul 2010, 05:25 am
LOL.  My Taiwanese OEM is nearsighted.  Forgot to screen for that a few years ago.  I'll make some extra dim LEDs next production.  TWO.2s are dimmer I promise.
Title: Re: One.2 Questions
Post by: brother love on 13 Jul 2010, 04:37 pm
p.s.  I disabled the Blue LED on the front when I did the crossover adjustment...just didn't plug it back in....and I can sleep again!   Seth, seriously...you can see that LED from SPACE!!  :o

Hey use it as a night light, or shining beacon if you will.  :green:

When I disconnected the LED tether to access 80 Hz jumper, I left it unplugged as well.

Re: sub integration w/ my GR Research N2x's (sealed 6-1/2" drivers 85 dB eff.), I utilized a Rat Shack SPL meter & 10 Hz- 300 Hz frequency tones to dial in sub xover/ volume & my funky room nodes. Ended up turning the sub volume down considerably & set the xover to 45 Hz to get as flat a response as reasonably possible.

Bass seems almost thin but it's cause I got used to a bass heavy set-up.  Now inner detail is off the charts, very clean sound & bass is super duper tight & fast.

I listened to The Band's Music from Big Pink last night, & Richard Manuel's beautiful haunting voice on Tears of Rage gave me chills.  Beck- Sea Change was normally a muddy mix 'til I hooked-up the One.2 & N2x's. It is now open & sooo detailed. My Morning Jacket- Z went from excessive, boomy bass to a very clean delineated sound, far easier to listen to now.

The One.2 w/ battery power supply ps is as much fun as the circus & cotton candy! 
Title: Re: One.2 Questions
Post by: eclein on 13 Jul 2010, 05:05 pm
Very cool!!!! It gets better and better!!! Enjoy brother love :dance:
Title: Re: One.2 Questions
Post by: srb on 13 Jul 2010, 05:06 pm
p.s.  I disabled the Blue LED on the front when I did the crossover adjustment...just didn't plug it back in....and I can sleep again!   Seth, seriously...you can see that LED from SPACE!!  :o

I don't know why blue LEDs have become so popular.  Every irritatingly bright LED I have in the house is BLUE!
 
 
Blue LEDs really are brighter than their old-fashioned red and green counterparts.  Barney O'Meara, vice president of Canadian LED manufacturer The Fox Group, said blue LEDs have at least 20 times the luminous intensity of old-fashioned red and green indicators. O'Meara said his company has developed technology to manufacture low-intensity blue LEDs.
 
"Blue tends to cause more discomfort and disability glare than other, longer wavelengths," said Dr. David Sliney, an expert on the harmful effects of bright light sources at the U.S. Army Center for Health Promotion and Preventive Medicine in Maryland. Sliney said the eye's lens cannot focus sharply on the blue lights. While red or green light is focused precisely onto the retina, blue light is focused slightly in front of it, which causes a distracting halo around bright blue lights.
 
In addition, blue scatters more widely than other colors as it passes through the eyeball, Sliney said. Together, these two effects cause the intense blue light from a point source, like an LED, to spread out across the retina, interfering with other parts of the scene. It's called dispersion: Blue's shorter wavelength makes it refract at a greater angle than, say, red or green.
 
Also, human vision becomes far more sensitive to blue when ambient light levels are low, a phenomenon known as the Purkinje shift. So a blue light that is merely eye-catching on a brightly lit store shelf can become dazzling when the lights are low, such as when watching a movie on a laptop in a dimly lit room.
 
Some researchers report that, at night, even low-level blue light may be enough to trigger recently discovered receptors in the retina that can depress melatonin production, disrupt sleep patterns and suppress the immune system.

http://www.dcontinuum.com/content/news.php?id=209
 

Steve
Title: Re: One.2 Questions
Post by: JohnR on 13 Jul 2010, 05:11 pm
I was planning to put a big resistor in series with mine.
Title: Re: One.2 Questions
Post by: brother love on 13 Jul 2010, 05:48 pm
A google search on bright light "moth to a flame" matter:   http://martybugs.net/articles/bling.cgi

One quick fix suggestion is apply permanent marker to blue LED. I might try a Sharpie  on a small test portion tonight...

Title: Re: One.2 Questions
Post by: justplainmike on 13 Jul 2010, 08:06 pm
One quick fix suggestion is apply permanent marker to blue LED. I might try a Sharpie  on a small test portion tonight...

I tried the sharpie thing...and was sweating because i didn't want to mark up my beautiful white finish.  The sharpie barely took to the LED and made no difference in light output.  My 2 cents :-)

Mike
Title: Re: One.2 Questions
Post by: virtue on 13 Jul 2010, 08:49 pm
It needs a bigger resistor inline.  There's one there but it's too small.  Jason can make the fix if you want to send him your LED (via Cami aka "mama virtue", cami@virtueaudio.com).
Title: Re: One.2 Questions
Post by: dvenardos on 13 Jul 2010, 09:35 pm
and the magic size is?  :eyebrows:

It needs a bigger resistor inline.  There's one there but it's too small.  Jason can make the fix if you want to send him your LED (via Cami aka "mama virtue", cami@virtueaudio.com).
Title: Re: One.2 Questions
Post by: virtue on 13 Jul 2010, 09:42 pm
400 ohms.  We use 220 ohms on the ONE.2, 330 ohms on the TWO.2.  The voltage is < 5v and current nearly nothing.
Title: Re: One.2 Questions
Post by: justplainmike on 13 Jul 2010, 11:00 pm
I'm just leaving mine unplugged..i know it's on because wonderful sounds are coming out of my speakers :-)
Title: Re: One.2 Questions
Post by: eclein on 13 Jul 2010, 11:19 pm
As long as these amps sound as good as they do I can deal with a little blue light!!! Blue=Good TUNES!!!! :dance: :banana piano: :drums: :guitar:
Title: Re: One.2 Questions
Post by: Nuuk on 14 Jul 2010, 07:41 am
Not wishing to sound pedantic but when people say "a bigger resistor' they mean a larger value, not a larger size.

So if anybody is doing the mod, you don't need an 11 watt wirewound resistor, a 'normal' metal film 0.25 watt is fine.  :wink:

Title: Re: One.2 Questions
Post by: dvenardos on 14 Jul 2010, 04:45 pm
I can assure there isn't room for anything "bigger" in there.  :lol:

Not wishing to sound pedantic but when people say "a bigger resistor' they mean a larger value, not a larger size.
Title: Re: One.2 Questions
Post by: justplainmike on 18 Jul 2010, 04:50 am
Hi All,

Still doing a burn-in and running the amp through a TON of music.  I can echo a lot of other owner's sentiments about how this amp makes me want to re-discover my music.  I'm overall very satisfied even at this early point with my One.2.  But I've got this creeping sensation (no pun intended) that I'm going to be wanting to upgrade the power on this thing...I've read all the posts I could find on the forums about batteries, switching and linear power supplies...and I'm still confused as to which to lean towards.   My setup again:

SB3-->Audio-Gd pre/headphone amp-->Axiom M3 v2 and Mirage S8 subwoofer.  80hz x-over selected.

Basically I love the sound...just want a little more volume.  Love the battery idea but will I get as much volume output compared to a linear or switching PS?  What do I give up SQ wise if I go w/a PS vs Battery?   HELP!!!  I'm more confused after reading the forum posts!!   :scratch:
Anyone tried both or have a similar setup to me care to weigh in?   Thanks in advance.

Mike
Title: Re: One.2 Questions
Post by: Nuuk on 18 Jul 2010, 07:07 am
I'm not sure that any power supply suitable for the ONE.2 will give you considerably more volume. You can only move so much air in your room with those very small speaker cones.

Likewise, a Sensation isn't likely to solve that particular issue.

Before you change amps and power supplies, try and borrow a pair of slightly larger, more efficient speakers just to see if that gives you the volume level that you are looking for. And if you can borrow a pre amp with a bit of gain, that would be another useful audition to see if your system will go loud enough.
Title: Re: One.2 Questions
Post by: justplainmike on 18 Jul 2010, 07:21 am
Hi Nuuk,

Thanks for the reply.  I'm at almost sufficient volume as it is when I'm nearing the end of the dial.  But there's really no headroom at that point.  Stock power is about 30wpc and upgrading the supply would net me ~40-44wpc.  I know that's only a dB or two more but what about the headroom?  Would it be better to go with a battery ps in this case??  What supply are you using and what speakers?

Re: new speakers...my wife would have me killed!  :nono: Besides she thinks it's plenty loud now  :roll:
Title: Re: One.2 Questions
Post by: virtue on 18 Jul 2010, 07:35 am
Mike,
Remember that with the log pot, you get 1/2 the volume in the last 1/4 turn... and there's no shame in full-out.  You will get another 30% more power with the bigger supplies but not more.  I suggest that you buy either or both a 130w supply or battery kit.  Send back what you don't want.
Enjoy!
Seth
Title: Re: One.2 Questions
Post by: eclein on 18 Jul 2010, 01:02 pm
I use a 130W power supply with my TWO.2 and have plenty of headroom..I'd take Seth's suggestion and order both, then pick what works best!! Enjoy...they just keep growing on you and get better and better! :thumb: :thumb: :thumb:
Title: Re: One.2 Questions
Post by: justplainmike on 18 Jul 2010, 04:33 pm
Mike,
Remember that with the log pot, you get 1/2 the volume in the last 1/4 turn... and there's no shame in full-out.  You will get another 30% more power with the bigger supplies but not more.  I suggest that you buy either or both a 130w supply or battery kit.  Send back what you don't want.
Enjoy!
Seth
Thanks Seth...I didn't realize the pot worked that way...do all pots do this??  I'm always hesitant to crank the volume too far.  I've had nasty clipping experiences w/previous (and admittedly substandard) receivers.   I do notice that, even close to max volume, the amp is running out of gas..not bad sounding (soft clipping maybe?) but just not as tight as a lower volume. 

Ordering both upgrades is a great idea....but I'm wondering if it's just a ploy to get me to keep and enjoy both!?!?   :wink:
Title: Re: One.2 Questions
Post by: Nuuk on 19 Jul 2010, 07:07 am
Quote
What supply are you using and what speakers?

I use a Paul Hynes regulated supply and Hawthorne Audio Duets. The Duets have two 15 inch drivers per channel (95db efficient) so the issue of not enough power never arises for me. I do appreciate that not everybody can accommodate such large speakers but going for efficient speakers removes a lot of potential difficult choices when putting together the rest of the system.

But as I said, it may be more gain you need rather than more power. As Seth says, you can run the ONE.2 etc flat out and there shouldn't be any problems with clipping. Here's a graphical representation of what he is talking about with the log pots.

(http://www.geofex.com/article_folders/potsecrets/pottaper.gif)








Title: Re: One.2 Questions
Post by: eclein on 19 Jul 2010, 01:23 pm
Crank it up!!!!! :dance: :dance: :dance:
Title: Re: One.2 Questions
Post by: CSI on 19 Jul 2010, 06:50 pm
Thanks Seth...I didn't realize the pot worked that way...do all pots do this??  I'm always hesitant to crank the volume too far.  I've had nasty clipping experiences w/previous (and admittedly substandard) receivers.   I do notice that, even close to max volume, the amp is running out of gas..not bad sounding (soft clipping maybe?) but just not as tight as a lower volume. 

Ordering both upgrades is a great idea....but I'm wondering if it's just a ploy to get me to keep and enjoy both!?!?   :wink:

In my experience volume pots are usually tapered one way or the other so that the useful range, for most people, occurs around the middle. If a pot is set up to be completely linear you might get more volume than you can use in the first 25% of rotation and it will be nearly impossible to "fine tune" your volume setting. This is why the phrase, "turn it up to 11!" is so silly.
Title: Re: One.2 Questions
Post by: virtue on 19 Jul 2010, 07:27 pm
Bur ours does go to eleven. It gives it that extra push over the edge...
Title: Re: One.2 Questions
Post by: justplainmike on 20 Jul 2010, 02:39 am
Thanks for the updates...food for thought!  I did notice that the volume goes up faster higher on the dial...which I love!  I get good quality sound at low levels when I'm listening to music at night before/during sleep time.  And there's much more precision of volume at low levels...btw, this is going in the review :-)
Title: Re: One.2 Questions
Post by: virtue on 20 Jul 2010, 05:17 am
The first prototype had a THAT limiter circuit.  I didn't want any customer to ever see clipping.  Roger convinced me that it would be a better strategy to first make it sound good before mucking up the signal path.  He won that argument.  We've elevated the sound beyond "recreational" and that costs something.  Yanking the anti-clipping circuit was like gutting the leather seats in your BMW to save a few pounds on the track.  We're interested in faster laptimes at virtually any cost ;-)
Title: Re: One.2 Questions
Post by: fredgarvin on 20 Jul 2010, 03:39 pm
Thanks for the updates...food for thought!  I did notice that the volume goes up faster higher on the dial...which I love!  I get good quality sound at low levels when I'm listening to music at night before/during sleep time.  And there's much more precision of volume at low levels...btw, this is going in the review :-)
Hi Mike, if you'd like, include a comparison with the Khartago in your review, I, and no doubt others, am familiar with it's 'sound' and that would help me to conceptualize the Virtue amp.
Title: Re: One.2 Questions
Post by: justplainmike on 20 Jul 2010, 05:31 pm
Hi Mike, if you'd like, include a comparison with the Khartago in your review, I, and no doubt others, am familiar with it's 'sound' and that would help me to conceptualize the Virtue amp.
I haven't used a Khartago amp before.  I will be comparing the One.2 to my previous DTA-100, Sonic Impact Super T-amp, and panasonic SA-XR55.  Will be posting thoughts hopefully this weekend or so. 

Title: Re: One.2 Questions
Post by: fredgarvin on 25 Jul 2010, 09:13 pm
Oops, I must have confused you with someone else. I to have a Panny xr55 that I use for HT and occasional music.
Title: Re: One.2 Questions
Post by: justplainmike on 3 Aug 2010, 04:46 am
Okay...I've given this thing enough of a listen to write a review now.  BUT, it's going to be a long review...esp. with comparisons to other equipment and music notes.  Also, I'll be posting this to Headfi.org and AVS forums as well.  I want to share my thoughts with as many folks as possible.  I've always been grateful to everyone that posts their thoughts and take the time to write reviews of equipment that I'm interested in.  I want to return the favor or pay it forward as it were.  So the question is this:  Better one long review or post in parts as it's written?  Thoughts or preferences??  To be continued..... 8)
Title: Re: One.2 Questions
Post by: CSI on 3 Aug 2010, 06:12 pm
Having done a little professional writing here's a suggestion. Put all your thoughts down in one long review. Then let it mellow for at least 24 hours (we can wait) and go back and revise it. Be a little ruthless with yourself. You won't edit out anything really important and the end result will be more effective.
Title: Re: One.2 Questions
Post by: virtue on 3 Aug 2010, 09:20 pm
Mike the suspense is killing me.