L2 Signature Monoblocks - Information and Discussion Thread

0 Members and 1 Guest are viewing this topic. Read 5464 times.

decur

  • Jr. Member
  • Posts: 37
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #40 on: 28 Jul 2018, 07:49 pm »
Oh,
Forgot to mention,i am running gamut rs5i 4 ohm speakers,which are current hungry monsters
And the L2 mono’s do not even break a sweat. I was worried,that 75w into 8ohms,140w into 4 ohms would not be sufficient power for my gamuts,but NO PROBLEM!!!
These amps have loads of current and are lightning fast.
 

Ric Schultz

  • Industry Participant
  • Posts: 717
    • http://www.tweakaudio.com
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #41 on: 28 Jul 2018, 08:01 pm »
If you remove all of your cables (power, interconnect, digital and speaker) off the floor you will hear a far better system.....way more open, transparent and holographic.  You can make cable risers out of solid wood, cardboard or buy some commercial ones.

decur

  • Jr. Member
  • Posts: 37
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #42 on: 28 Jul 2018, 08:10 pm »
Thanks for the tip,will do!

Vinnie R.

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #43 on: 2 Aug 2018, 02:34 pm »
Oh,
Forgot to mention,i am running gamut rs5i 4 ohm speakers,which are current hungry monsters
And the L2 mono’s do not even break a sweat. I was worried,that 75w into 8ohms,140w into 4 ohms would not be sufficient power for my gamuts,but NO PROBLEM!!!
These amps have loads of current and are lightning fast.

Hi decur,

Thanks for your post, and your system and room look great!

When you hear the L2 Preamp (with the all new L2 Phonostage for that Palmer turntable!) with your L2 Monoblocks, then you are really going to hear what the L2 Monoblocks can do!  :drool:  :guitar:  :notworthy:



Thanks again and I'm very glad you are enjoying your L2 Monos with those beautiful sounding rs5i's!

Vinnie

Vinnie R.

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #44 on: 3 Aug 2018, 05:19 pm »
All,

I forgot to mention more detail about the 12V Trigger Inputs.  Not a very "exciting" topic, but let me go over it now:

Via the L2 Preamplifier, you can turn ON/OFF the L2 Monoblocks (or another power amp with 12V trigger inputs) using the dual 12V Trigger outputs of the L2 Preamp.

For both components, I chose Neutrik 1/4" (6.35mm) locking TRS panel mount jacks.  I know it is more common (and less expensive) to use the  the smaller 3.5mm jacks (especially the cheap PCB mount jacks), but I found that none of them are nearly as rugged as this 1/4" panel-mount locking jack.

So depending on the length of your interconnects from L2 Preamp to L2 Monoblocks, you want to use approx. the same length TRS cables for the 12V triggers for each monoblcok.  I tested these, and they are very well made, readily available in many lengths, and at a great price!

https://www.monoprice.com/product?c_id=115&cp_id=11509&cs_id=1150901&p_id=4792&seq=1&format=2

[1.5ft, 3ft, 6ft, 10ft, 15ft, 25ft, 35ft, 50ft, 75ft]  :thumb:

NOTE:  If you are outside the USA, it is probably much more convenient that I order these cables for you and include them with your L2.  Just let me know in the comments section of your order.

L2's 12V triggers (simple explanation):

When you turn ON your L2 Preamp and press the TRIG button on the front panel, the two 12V trigger outputs are turned ON.  This turns on/off the L2 Monoblocks without you having to turn on their ON/OFF switch. 

L2 Preamp saves the 12V trigger setting when you turn it ON/OFF.  This way, you can turn everything ON/OFF together via the PWR button on the L2 Preamp remote (or front panel).  Simple.

---

Q: [From a customer looking to use two pair of L2 Monoblocks for bi-amping his speakers].  How do I connect the triggers for 2 pair of L2 Monoblcocks (4 monoblocks)?

A: A TRS Y-cable will do the trick.  One for the LEFT channel trigger output (to turn on the two LEFT monoblocks in a bi-amp system), and one for the RIGHT channel.


This way, you can turn ON your L2 Preamp and all 4 monoblock with just a press of a button on the remote.  8)

And if you don't want to use a Y adapter, they make cables that go from one TRS male plug to two TRS male plugs.

And yes, I have seen cables that convert TRS male to 3 TRS females in case you want to tri-amp with 3 pairs of L2 Monoblocks.  :green:

Each L2 Monoblock trigger input only draws 45mA, and each L2 Preamp trigger output can provide 250mA continuous.

Q:  Does the 12V trigger cable have any influence on sound quality?

A:  No - not at all.  It is just a low current 12V DC on/off signal that turns on/off a power relay (instead of manually turning on/off the power rocker switch). 

I think that covers it!

Vinnie

MicheladaAntelope

  • Jr. Member
  • Posts: 3
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #45 on: 11 Aug 2018, 05:11 pm »
I’m not well versed in describing the subtle sonic differences in one great set up vs another great set up.   So, I’m going to tell a brief story of my new L2 monos powering a pair of Harbeth M40.2’s, being fed by my LIO DHT pre.

You see, I call my listening room (living room) varyingly “happy place”, “sonic wonderland”, etc.   It’s the best.   It was the best when I ran LIO as an integrated only.  Got much better when I added a VR120, and now moving to the new L2’s I can say it really is my “sonic wonderland”.

A couple of weeks ago I returned home around 1 a.m. from a rip roaring Phish show on a school night with the alarm set for 430.  By the time I arrived at home, the show was already downloaded and ready.   I thought to myself, “lets see if Vinnie can get me back THERE”.   And so, in a highly questionable move, I launched Roon, loaded up the show that finished only 90 minutes earlier, set LIO’s volume to 45 as a starting point 🤪 and pushed play.    Long story short, Vinnie definitely got me back THERE, but I was only there for about 45 seconds before I was nearly attacked by multiple children, an angry wife, and the dog.   TRUE.   

But then at 430 the alarm goes off.   I really really really wanted to be back THERE again....   But I know where the line is and this would most assuredly have gone way over it.   So I thought to myself, “can vinnie get me THERE at extra low volumes too?”   Well, its dark, its early, I’m not thrilled about going to work in 30 minutes.  But can’t I go back THERE one more time?   LIO volume set to 1.  Can’t get any quieter.   Sit down on couch.   Launch Roon and push play.   I was so much more blown away.   The ability of the LIO/L2 combo to deliver spot on reproduction of what really happened, at extreme ends of the volume spectrum was shocking to me.   ALL of the details were perfectly clear.   

Vinnie, thanks for helping to create my sonic wonderland.

Mike

guf

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #46 on: 11 Aug 2018, 11:01 pm »

A couple of weeks ago I returned home around 1 a.m. from a rip roaring Phish show on a school night with the alarm set for 430.  By the time I arrived at home, the show was already downloaded and ready. 

we love the Phish! what show? Great job Vinnie.

Vinnie R.

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #47 on: 16 Aug 2018, 03:42 pm »
Hi MicheladaAntelope,

Quote from: MicheladaAntelope
You see, I call my listening room (living room) varyingly “happy place”, “sonic wonderland”, etc.   It’s the best.   It was the best when I ran LIO as an integrated only.  Got much better when I added a VR120, and now moving to the new L2’s I can say it really is my “sonic wonderland”.

...The ability of the LIO/L2 combo to deliver spot on reproduction of what really happened, at extreme ends of the volume spectrum was shocking to me.   ALL of the details were perfectly clear.   

Thank you for posting your impressions of your L2 Signature Monoblocks with your LIO DHT Preamp!   :notworthy:

Quote from: guf
we love the Phish! what show? Great job Vinnie.

Thank you, guf!

It sounds like Mike brought the show to his home!   :thumb: :guitar: :drums: :singing:

Vinnie

MicheladaAntelope

  • Jr. Member
  • Posts: 3
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #48 on: 17 Aug 2018, 03:22 pm »
DAILY IF POSSIBLE

Vinnie R.

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #49 on: 3 Oct 2018, 04:57 pm »
L2 Signature Monoblocks are ready for RMAF, in 'king suites' 3018 and 4024!  8)



See you there!

Vinnie

Em2016

  • Jr. Member
  • Posts: 8
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #50 on: 7 Nov 2018, 07:37 am »
I posted the following in the Axpona 2018 thread regarding a similar question about the caps (applies for the L2 Preamp and Monoblocks):

Copy/paste:

They are all linear supplies with very-low ESR (equivalent series resistance) electrolytic capacitors (not ultracaps).  The ESR on the higher voltage rails of the L2 Monoblocks is actually even lower with these electrolytics that I am using compared to using ultracaps.  The reason is because the total ESR of the cap bank on the rails using the ultracaps increases as you add them in series and you need many of them to get these voltage rails (approx. 4 times as many as I use in LIO).

L2 does not have external power supplies.  It is all internal (you can see the rear panel pics of the L2 Preamp and Monoblocks on our website).
Vinnie

Hi Vinnie

I understand the new L2 range to have lower noise than the LIO ultraCap.

But what about mains/AC RF filtering? The disconnection from mains power and breaking AC leakage current loops (and associated mains RF) for the LIO range is a big advantage regarding mains RF.

What lengths have you gone to, for mains RF filtering with the L2 range?

Very interested in the L2 range pre and monoblocks.

Cheers!

Vinnie R.

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #51 on: 7 Nov 2018, 03:56 pm »
Hi Em2016,

Quote
What lengths have you gone to, for mains RF filtering with the L2 range?

For the L2 Signature Monoblock, RF noise from the AC mains is highly filtered via the inductance
of the 500VA toroid, as well as a C-R-C-R-C filter after the rectification stage.  That filter cuts
out noise by -120dB at 100kHz.  The amplifier stage itself has quite good power supply and common
mode rejection ratios as well.

For the L2 Signature Preamplifier, I worked with Brian Lowe of Belleson on the dual mono power supply design
and am using his patented super regulator designs throughout, as they are needed to get the noise floor
as low as possible in this DHT design, as well as for the L2 Dac and L2 Phonostage options.


I'm off to the NYC today and setting up for the NYAS tomorrow... if you can, come on over for a listen!

Vinnie

Em2016

  • Jr. Member
  • Posts: 8
Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #52 on: 8 Nov 2018, 01:13 am »
Hi Em2016,

For the L2 Signature Monoblock, RF noise from the AC mains is highly filtered via the inductance
of the 500VA toroid, as well as a C-R-C-R-C filter after the rectification stage.  That filter cuts
out noise by -120dB at 100kHz.  The amplifier stage itself has quite good power supply and common
mode rejection ratios as well.

I'm off to the NYC today and setting up for the NYAS tomorrow... if you can, come on over for a listen!

Vinnie

Thanks Vinnie. So in terms of AC/mains borne RF noise, your L2 series measures as well as your LIO ultraCap? In your measurements?

I'm on the other side of the world, otherwise I'd definitely be at the NY show!

Many thanks again

Vinnie R.

Re: L2 Signature Monoblocks - Information and Discussion Thread
« Reply #53 on: 13 Nov 2018, 09:49 pm »
Hi Em2016,

Quote
Thanks Vinnie. So in terms of AC/mains borne RF noise, your L2 series measures as well as your LIO ultraCap? In your measurements?

Yes, and it actually measures better in terms of noise, distortion, bandwidth...

Best regards,

Vinnie