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☯️ Cavalli Audio's Liquid Carbon... a $599 Cavalli amp??? - Page 15

post #211 of 5931

I have read this whole thread twice and have not seen what Class will the amp be..will it be Class A?

post #212 of 5931
Quote:
Originally Posted by d1sturb3d View Post
 

I have read this whole thread twice and have not seen what Class will the amp be..will it be Class A?

 

Class A or not Class A is not an absolutely fixed thing. It depends on the topology of the output stages and how they are biased.

 

Most amps are designed to run Class A for up to a give amount of power and then transition smoothly into Class AB. Exactly at what power output this happens is usually directly related the current bias of the O/P stage.

 

For example, an amp might be designed to run Class A up to 1W into 50R and then transition to Class AB. Some amps are designed to stay in Class A operation to their full power output.

 

However, there is a serious tradeoff. The longer you want an amp to stay in Class A (that is the higher power you want in Class A) the higher the bias currents and the higher the power you have to dissipate at idle when the amp is just sitting there doing nothing.

 

The Liquid Gold, for example, stays Class A to about 2.5W into 50R. But, at idle each output device is cooking at about 4.5-5W and their are 8 output devices in the (balanced) amp.

 

Since the Carbon is very small and does not have a huge amount of power dissipation capacity, it cannot have high bias currents in the output devices. Thus, it won't run very long in Class A before going into Class AB. I don't believe you will notice this transition.


Edited by runeight - 4/14/15 at 5:46pm
Dr. Cavalli gained notoriety with his first DIY amplifier projects. His success has blossomed into Cavalli Audio, a world leader in amplifier design.
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post #213 of 5931
Quote:
Originally Posted by runeight View Post
 

 

Class A or not Class A is not an absolutely fixed thing. It depends on the topology of the output stages and how they are biased.

 

Most amps are designed to run Class A for up to a give amount of power and then transition smoothly into Class AB. Exactly at what power output this happens is usually directly related the current bias of the O/P stage.

 

For example, an amp might be designed to run Class A up to 1W into 50R and then transition to Class AB. Some amps are designed to stay in Class A operation to their full power output.

 

However, there is a serious tradeoff. The longer you want an amp to stay in Class A (that is the higher power you want in Class A) the higher the bias currents and the higher the power you have to dissipate at idle when the amp is just sitting there doing nothing.

 

The Liquid Gold, for example, stays Class A to about 2.5W into 50R. But, at idle each output device is cooking at about 4.5-5W and their are 8 output devices in the (balanced) amp.

 

Since the Carbon is very small and does not have a huge amount of power dissipation capacity, it cannot have high bias currents in the output devices. Thus, it won't run very long in Class A before going into Class B. I don't believe you will notice this transition.

 

I was actually thinking until when is the Carbon be operating in Class A before transitioning into B..I was just checking the specs and it was not mentioned..hence the question..Thank you though for answering :D

post #214 of 5931
Features
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Still my favorite section on the product page. I think it's the little period that makes all the difference.
post #215 of 5931
Thread Starter 
Quote:
Originally Posted by Pirakaphile View Post

Features
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Still my favorite section on the product page. I think it's the little period that makes all the difference.

 

Yes, I think so.  And why are you looking at the page on this fine morning?  ;)


Home of the Liquid Carbon, Liquid Crimson, Liquid Glass, Liquid Gold and
Liquid Lightning headphone amplifiers... and the upcoming Liquid Spark!

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post #216 of 5931

^^^ limbering up for later....

post #217 of 5931
Thread Starter 

I did the account hack this morning, so I'm all set here.  :smile:


Home of the Liquid Carbon, Liquid Crimson, Liquid Glass, Liquid Gold and
Liquid Lightning headphone amplifiers... and the upcoming Liquid Spark!

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post #218 of 5931
Quote:
Originally Posted by warrenpchi View Post
 

 

Yes, I think so.  And why are you looking at the page on this fine morning?  ;)

Oh just perusing the updated product description y'know? 

post #219 of 5931
Quote:
Originally Posted by warrenpchi View Post

I did the account hack this morning, so I'm all set here.  smile.gif
what is the account hack ? Putting another product in the cart.
post #220 of 5931
Quote:
Originally Posted by warrenpchi View Post
 

I did the account hack this morning, so I'm all set here.  :smile:

  

post #221 of 5931

I think everyone is getting their PC's/Mac's warmed up and ready for "high noon" Texas time. I'm ready to order the Liquid Carbon.:L3000: 


Edited by rollinbr - 4/14/15 at 6:37am
post #222 of 5931
Quote:
Originally Posted by d1sturb3d View Post
 

 

I was actually thinking until when is the Carbon be operating in Class A before transitioning into B..I was just checking the specs and it was not mentioned..hence the question..Thank you though for answering :D

 

Oh. A typical unit will transition at about 100mW into 50R. Note that the THD measurement was at 500mW into 32R, well above this transition with a more difficult load and the distortion is still very low.

Dr. Cavalli gained notoriety with his first DIY amplifier projects. His success has blossomed into Cavalli Audio, a world leader in amplifier design.
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post #223 of 5931

TODAY is going to be badass. How long of a wait do we have if we're lucky enough to get even one unit?

post #224 of 5931
Quote:
Originally Posted by ButtUglyJeff View Post

  
lol so much for sharing info.
post #225 of 5931
Quote:
Originally Posted by VisceriousZERO View Post
 

TODAY is going to be badass. How long of a wait do we have if we're lucky enough to get even one unit?

 

See first post of this thread.

Dr. Cavalli gained notoriety with his first DIY amplifier projects. His success has blossomed into Cavalli Audio, a world leader in amplifier design.
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