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New Cavalli Audio Liquid Glass Amplifier - Fall Release - Page 44

post #646 of 652
Quote:
Originally Posted by DoctaCosmos View Post

Ahhhh, LG as a pre-amp for speakers sounds awesome! Is that possible? Also, the reason I came here to post is a simple question. Has anyone heard the LG with an AKG K812?

 

Yes , it is possible and indeed probable :) . LG makes for a great preamp when not driving headphones.

 

It has been too long since I heard the AKG K812 with the LG but I still regularly pick up my K501s with mine and they sound fantastic.

 

..dB

post #647 of 652
The LG is an OTC? Or different from both? I know it's a low impedance amp but any way of getting good results with an hd800
post #648 of 652
Quote:
Originally Posted by DoctaCosmos View Post

The LG is an OTC? Or different from both? I know it's a low impedance amp but any way of getting good results with an hd800

 

No , LG is a tube hybrid. OTC/OTL etc is reserved for "pure tube" amp , not that most of them today don't have any solid state active devices in them. The tube in the LG offers the voltage ( signal ) amplification, the buffer is completely neutral and offers current amplification ( ability to drive practically any headphone ) . The unique attributes of the LG is that the design allows you to experience the subtle ( and sometimes not so subtle ) differences with tubes.

 

Quote:
Originally Posted by DoctaCosmos View Post

 I know it's a low impedance amp but any way of getting good results with an hd800

 

Yep, just plug them in. I know I am not alone when I say this but this is one of the best amps for the HD800. It has beautiful synergy with them.

 

..dB

post #649 of 652
That's great to know and I appreciate the response. I heard the alpha primes with the liquid glass and while I don't know what tubes he was using, there was so much control and authority to the sound that was subdued with delicateness at the same time. Through possible ignorance, I attributed the delicateness to being the tubes. What's the difference between this hybrid design and OTC if you don't mind asking. While I have heard an OTC amplifier ( the Dragon inspire) i didn't know what to think of it because I had only heard a couple songs through it that I didn't know, and a headphone I'd never heard at all. Basically nothing to compare it to. Are there common sonic attributes in the difference between the two types of amplifiers?
post #650 of 652

There is no simple answer to this :

 

Tube amps generally fall into the following

OTC = output transformer coupled
OTL = output transformerless 
OCL = output capacitorless

 

I guess strictly speaking you could have any number of amps ( solid state and vacuum state ) fall into these categories. The problem is not every OTC amp sounds the same because there are several design elements which go into the amplifier itself and the various transformers impose a sound of their own. The more expensive amplifiers generally use more expensive transformers and each transformer has an optimal matching output impedance for specific headphones / speakers. 

 

The simplest ( and best ) way to think of the Liquid Glass is a very expensive SET amplifier - these amps cost a lot of money as they want to present the large power tubes ( 245 / 300B etc ) in the best possible light. Normally you would not be able to drive headphones from the output of a 12AU7 tube, but the buffer in the LG takes this function away from the tube. The high impedance at the buffer input "fools" the tube into thinking it has no load and it merrily does its thing without any stress. This lets you hear the tube in it's optimal operating conditions while the very neutral buffer ( which has an extremely low output impedance ) does all the work to drive the headphones. 

 

The result of this is that you are getting large power tube type performance out of small triodes and the sound is similar to a exceptional single ended triode amplifier . The amazing thing about the LG is that you can roll an incredible number of tubes ( and each tube type has its own variation of manufacturer and date of production = endless possibilities ) and you can hear the changes in all these tube types because that is what the amplifier is allowing you to hear. 

 

..dB


Edited by dBel84 - 11/17/14 at 9:52pm
post #651 of 652
AMAZING...
one more quick question please. Will the pre-amp option use the tube stage at all and then transfer the tube signature to the speaker?
post #652 of 652

Yes it does and will :) ..dB

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