AudioCircle

Industry Circles => GR Research => Topic started by: danvprod on 23 Apr 2018, 06:12 pm

Title: WITHDRAWN GR Research Super V pair + Rythmik A370PEQ amps for sale
Post by: danvprod on 23 Apr 2018, 06:12 pm
Holding on to these. I figured out what was going on.
$2800

Selling my GR Research Super V pair and matching A370PEQ amps. These have been the best sounding speakers that I have ever heard in my room. They come alive with just a few watts thanks to their very high efficiency and separate subwoofer amps.

These were the pair that Danny had built, I am the second owner. Planning on building one of Danny's other designs next, mainly because I want the ability to have separate subwoofer arrays and maybe go with triples we will see. The first step is getting these sold.

I have the original boxes for the subwoofers and I have an extra diaphragm that I will include as a backup for the P-Audio co-axial drivers. I also have an EXTRA set of P-Audio co-axial driver that I have listed separately. I'd be willing to do $3500 for everything (I had the extra drivers listed as $1000, so $300 off if you grab everything).

What else to say about these. Danny sold finished pairs like this for $6500 when they were available. And they compete with speakers costing way more than that. If you have never heard open baffle servo bass, you are in for a real treat. These go to into the 20s for bass response.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 23 Apr 2018, 06:15 pm
Sorry I posted this in the wrong place. Mods can you please move this to the trading post? Sorry, Danny.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: Danny Richie on 23 Apr 2018, 08:35 pm
That's okay. You can post our products for sale in our circle.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gregfisk on 23 Apr 2018, 08:54 pm
That's okay. You can post our products for sale in our circle.

Danny, you are really cool about that. I have seen a few vendors move for sale posts out of their circle. I guess it does make sense to ask first but it is really kind of you to let people do this. I think the chances of selling these speakers goes way up when able to post in the manufacturers circle.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 23 Apr 2018, 09:00 pm
That's okay. You can post our products for sale in our circle.
Thanks, Danny, I appreciate it.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: Danny Richie on 23 Apr 2018, 09:02 pm
I have no issue with it at all. The Super-V's were a super fun speaker. I wish I could still offer them. It's a great deal for someone to pick them up used.

Plus Dan is a repeat customer. He will sell the Super-V's and order more product from us.

Customers support us. We can support them.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: Captainhemo on 23 Apr 2018, 11:01 pm
Nice   ,  someone  will  really  enjoy these  ,  wish I'd had an opportunity tohear a pair myself

jay
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gregfisk on 24 Apr 2018, 05:19 am
Nice   ,  someone  will  really  enjoy these  ,  wish I'd had an opportunity tohear a pair myself

jay

Well Jay, it you ever wander down to Seattle someday I've got just the place :thumb:
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: Captainhemo on 24 Apr 2018, 06:54 am
Well Jay, it you ever wander down to Seattle someday I've got just the place :thumb:

You bet  Greg,  would never   head down that way without  stopping in  :beer:

jay
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: rollo on 24 Apr 2018, 03:28 pm
Rent a truck and go steal those. Great speaker, period.


charles
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: Shakeydeal on 24 Apr 2018, 03:54 pm
Good luck on your sale, that's a good price.

Shakey
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: jpm on 24 Apr 2018, 07:04 pm
Wondering if anyone has experience running Super Vs with a LIO and what the experience is like?
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gregfisk on 24 Apr 2018, 10:36 pm
Wondering if anyone has experience running Super Vs with a LIO and what the experience is like?

We had a LIO in house at one of my G2Gs. We were having a little trouble with a hum in one channel so couldn't do any critical listening. It wasn't the LIO but we never did figure out what the issue was. It had plenty of power for the super Vs although I have found the wattage the amp has the better. Right now I have a 1200AS2 which is the new ice edge class D based amp. It's a loaner from a very generous fellow AC member. What it does even better than other high wattage amps is help the large Super V midrange keep up with the speed of the Servo Subs. When I have used lower watt amps like the LIO the midrange doesn't seem to be able to keep up with the serve subs as well. I'm not saying it's a bad match and I know some people even run SETS with their Super Vs but in my experience they work better with larger amps. YMMV of course.

Greg 
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 24 Apr 2018, 10:53 pm
Interesting, Greg. I have always used my Vs with low-wattage tube amps (currently running the 4 watt SEP in my avatar pic). I should try a higher wattage amp too.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gab on 24 Apr 2018, 11:11 pm
Interesting, Greg. I have always used my Vs with low-wattage tube amps (currently running the 4 watt SEP in my avatar pic). I should try a higher wattage amp too.

I bet you wouldn't sell them if you tried them with a Mivera amp....

gab
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 25 Apr 2018, 12:18 am
If anyone wants to send me one to test out as a loaner, I'm all for it. In general if I can get to the sound I want without having to sell these all the better.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: Rocket_Ronny on 25 Apr 2018, 01:25 am
What is the sound you want?

Rocket Ronny
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: morganc on 25 Apr 2018, 03:34 am
I ran mine with Joule Electra Monoblocks, with a Lampizator DAC.  Sublime, all encompassing soundstage.  If you were closer to NorCal I would consider buying them. 
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 25 Apr 2018, 01:55 pm
What is the sound you want?
Good question. What do I want?

* A bigger room *sigh*, but not much I can do about that. I tell myself I am lucky to have a dedicated room from listening and my office.
* A stable center image. This is my biggest problem right now. The image wanders often to the left speaker enough that it annoys me on a regular basis. I think this is a room issue, but don't know how to fix it.
* More mid weight (which is why the comment above about the AS1200 letting the P-Audio "keep up" with the Servo subs, got me intrigued). I have a depression in my response between 150 Hz and 350 Hz.
* Easier flexibility in positioning, which is why I am considering the separate sub/Otica choice. This would let me position the mains to get the best imaging and sound stage and subs to get the flattest bass response.

This about covers it. I may have someone local that has an AS1200 to demo. I am also open to other ideas...
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: SoCalWJS on 25 Apr 2018, 02:13 pm
Good question. What do I want?

* A bigger room *sigh*, but not much I can do about that. I tell myself I am lucky to have a dedicated room from listening and my office.
* A stable center image. This is my biggest problem right now. The image wanders often to the left speaker enough that it annoys me on a regular basis. I think this is a room issue, but don't know how to fix it.
* More mid weight (which is why the comment above about the AS1200 letting the P-Audio "keep up" with the Servo subs, got me intrigued). I have a depression in my response between 150 Hz and 350 Hz.
* Easier flexibility in positioning, which is why I am considering the separate sub/Otica choice. This would let me position the mains to get the best imaging and sound stage and subs to get the flattest bass response.

This about covers it. I may have someone local that has an AS1200 to demo. I am also open to other ideas...
How much time have you spent adjusting the Servo's, and what tools do you have at your disposal? Have you tried any room treatments?

It took me quite awhile to get the Bass where I wanted it to be using several different tools and playing around with room treatments. You may find that getting that straightened out can clean up other frequencies.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: poseidonsvoice on 25 Apr 2018, 02:30 pm
How much time have you spent adjusting the Servo's, and what tools do you have at your disposal? Have you tried any room treatments?

It took me quite awhile to get the Bass where I wanted it to be using several different tools and playing around with room treatments. You may find that getting that straightened out can clean up other frequencies.

SoCalWJS,

Dan's diligent work here (http://www.audiocircle.com/index.php?topic=150042.0), is a testament to how much he has already done in that regard.

Here (http://www.audiocircle.com/index.php?topic=151568.msg1620892#msg1620892) are some more detailed pics of his room and setup.

Dan, your decay times from 150-300 Hz are a bit short/quick; that's a double edged sword but I wouldn't dwell on it too much given that it is a very small octave although an important one for music. The instability of a center image, I agree, would be a more dire issue but I can't help much unless I am there. I am planning on a trip to the Raleigh/Durham area in May for some business.

Best,
Anand.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: HAL on 25 Apr 2018, 02:56 pm
One suggestion is to add more either diffusion or absorption below the first reflection point diffusors as a test.  Possibly even some pillows stacked as a test.  The servo subs work up into the range you are thinking gives the unstable image, and voice is still in that range. 

I use the hard fiberglass panels wrapped in Gilford cloth at mine and go from floor up.  Worked in my setup where I had those speakers.

I also had a problem with slap echos in my room that was stopped with absorption over the areas where I could hear it with hand claps. 

Just some thoughts.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: SoCalWJS on 25 Apr 2018, 04:01 pm
SoCalWJS,

Dan's diligent work here (http://www.audiocircle.com/index.php?topic=150042.0), is a testament to how much he has already done in that regard.

Here (http://www.audiocircle.com/index.php?topic=151568.msg1620892#msg1620892) are some more detailed pics of his room and setup.

Dan, your decay times from 150-300 Hz are a bit short/quick; that's a double edged sword but I wouldn't dwell on it too much given that it is a very small octave although an important one for music. The instability of a center image, I agree, would be a more dire issue but I can't help much unless I am there. I am planning on a trip to the Raleigh/Durham area in May for some business.

Best,
Anand.
Geesh....How did I miss that thread??  :duh:

Look's like he's done all of the things I've thought of with regards to room issues.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 25 Apr 2018, 04:48 pm
@Hal -- good thoughts. I have actually removed the diffusors and RPGs behind the speakers. So the only treatment I have in the room right now is the 5 bass traps. I almost pulled the trigger on some GIK freestanding bass traps with scatter plates to put behind the speakers or in between them over the windows. But then decided against it.

I definitely have a flutter echo between the side walls. It is clearly audible when I clap. I do still need another bass trap behind me as well to go to the ceiling.

Fabric wrapped hard panels at the first reflection points is a good idea as well. I suspect they are involved with the unstable center image. It's one of those things that you end up keying into in your system, and then you end up catching it and it frustrated you, and that causes you to not like listening to the system, which is the opposite of what it should be.

Anyways, appreciate all the suggestions. Always open to experimenting. Here is a more recent measurement:


(http://www.audiocircle.com/image.php?id=179339)
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: poseidonsvoice on 25 Apr 2018, 06:16 pm
Dan,

Don't know if you want to take this to the Acoustics or GIK forum but here goes anyway. It seems that you are satisfied for the time being with your low frequency response and decay.  And you have now shifted your attention to the area above 300 Hz (300-20khz specifically). This might be easier with REW but I bet Fuzz Measure is equally as good although I am unfamiliar with it.

That being said, I don't know if the above measurement was just one speaker or both of your Super V's together. I would recommend measuring only one speaker at a time (above 300Hz) to avoid phase interactions, and comb filtering which will render measurement inaccuracies in the higher frequency regions. You want to see how each speaker matches the other, particularly over the bandwidth of 250Hz to 4khz.  1/6th to 1/12th octave smoothing is enough. Higher than 1/12th octave and it gets difficult to interpret in room measurements particularly in the area above 300Hz. The vertical scale can span 50dB (as shown) but if you can change it to be 5dB increments, it might be more instructive.

Best,
Anand.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 26 Apr 2018, 01:24 am
Just updated my system thread http://www.audiocircle.com/index.php?topic=151568 (http://www.audiocircle.com/index.php?topic=151568), which is a better place to troubleshoot this, perhaps.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gregfisk on 26 Apr 2018, 03:14 am
Dan, Here's what I have found, first make sure you listen to Anand :thumb:. O.K. that's not what I was going to say but it's true :lol:

Here are a few things that really helped with my center stage. I brought my speakers at least 5' into the room, I realize this may not be possible. I added 6" GIK absorption panels at the first reflection points and installed floor to ceiling corner traps in the front corners. I have my audio rack on the side wall so nothing is in between the speakers. All of these things helped and I now have an amazing center stage. The instruments and voices float in the center of the speakers from the floor to about 7' high or more. My speakers are about 3' off of the side wall and about 5' or so off of the front wall. They are toed in so they are almost facing me. I sit about 10' away and the Super Vs are about 10' apart. You can see my room in my gallery. It is 20' x 30' x 10' so I don't know how any of this would work in your room but thought I would try and help.

Also, I have had my MHDT Havana in this system and really liked it. I also used my Joule Electra LA150MK11SE with my Super Vs and that was very nice as well. Now I have a Lampi Atlantic Plus with VC and currently I'm using a 1200AS2 amp that is kindly being loaned to me. Yes, the midrange does a great job of keeping up with the servo subs with this amp. The sound is fairly warm with the 1200as which surprised me. I've been looking at the Rouge Audio 1200AS2 based amp myself and If I get that sooner than later I would be happy to let you try it.

Greg

Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: bavmike on 26 Apr 2018, 04:05 am
Dan, Here's what I have found, first make sure you listen to Anand :thumb:. O.K. that's not what I was going to say but it's true :lol:

Here are a few things that really helped with my center stage. I brought my speakers at least 5' into the room, I realize this may not be possible. I added 6" GIK absorption panels at the first reflection points and installed floor to ceiling corner traps in the front corners. I have my audio rack on the side wall so nothing is in between the speakers. All of these things helped and I now have an amazing center stage. The instruments and voices float in the center of the speakers from the floor to about 7' high or more. My speakers are about 3' off of the side wall and about 5' or so off of the front wall. They are toed in so they are almost facing me. I sit about 10' away and the Super Vs are about 10' apart. You can see my room in my gallery. It is 20' x 30' x 10' so I don't know how any of this would work in your room but thought I would try and help.

Also, I have had my MHDT Havana in this system and really liked it. I also used my Joule Electra LA150MK11SE with my Super Vs and that was very nice as well. Now I have a Lampi Atlantic Plus with VC and currently I'm using a 1200AS2 amp that is kindly being loaned to me. Yes, the midrange does a great job of keeping up with the servo subs with this amp. The sound is fairly warm with the 1200as which surprised me. I've been looking at the Rouge Audio 1200AS2 based amp myself and If I get that sooner than later I would be happy to let you try it.

Greg

The 1200AS? Did you pull the module out of the amp and listen direct? What do you consider your Lampi Atlantic? A superclock?
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gregfisk on 26 Apr 2018, 07:11 am
The 1200AS? Did you pull the module out of the amp and listen direct? What do you consider your Lampi Atlantic? A superclock?

My Lampizator Atlantic Dac was designed and built from the ground up by the well known LuKanz Fikus who is an electrical engineer from Poland. According to him He picks all of his own parts from around the world and designs his dac circuits from scratch. He then installs these dac boards into his own housings which many know have changed through the years. These circuit designs become some of the best dacs on the planet. 

ICEpower is a Danish company that used to be part of B&O before they split off. According to them they build some of the best class D amplifiers in the world. They were designed by a team of engineers over many years. ICEpower then sells these amp boards to audio companies big and small who incorporate them into their own housings before selling them to the consumer. There are several companies throughout the world that use these same boards. It's up to the consumer to find a good company they trust and feel comfortable with. 

Greg
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: gregfisk on 26 Apr 2018, 05:36 pm
Dan, sorry for the off topic post, hopefully I won't need to do that again.

If you have a chance to try a high powered amp with your Super Vs before you sell them I think you would be surprised what they can do. Especially class D amps since my Crown XLS1500 also allowed the midrange driver to keep up with the servo subs.

Greg

Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 26 Apr 2018, 06:48 pm
Not off-topic! I love the troubleshooting and feedback and on what works and what doesn't with the super Vs. I just wanted to capture it in my system thread so I can keep track of all of it.
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: rockdrummer on 27 Apr 2018, 01:59 pm
Okay, I have been watching this thread a lot. I am in the position where I have super v speakers, blown away by how they sound, have been lucky to have such help here, and still wanting more...

My center image is great. Voice hovers magically. I'm wondering how much more imaging to look for. Do instruments really get separated in the super v with decent room treatment? How much to expect?

If this should be in another thread of its own, I understand. I don't know if it's an easy answer.
Thanks so much!
Open baffle and servo subs is the bomb!
Ben

Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: danvprod on 27 Apr 2018, 02:24 pm
@rockdrummer. I posted some updates to what's going on to my system thread that you might be interested in (http://www.audiocircle.com/index.php?topic=151568 (http://www.audiocircle.com/index.php?topic=151568)). What amp do you use with your Super Vs?

Dan
Title: Re: GR Research Super V pair + Rythmik A370PEQ amps for sale $2800
Post by: rockdrummer on 27 Apr 2018, 07:39 pm
I use a Bottlehead Stereomour.  I need to spend more time with that thread. 

Ben