Bada Amplifiers

afj · #1 8th October 2008, 09:00 PM

does anyone have any experience with these amplifiers?

Stuge · #2 8th October 2008, 10:06 PM

Which bada amplifier are you talking about ?

afj · #3 8th October 2008, 10:11 PM

the bada purer 3.8se or purer 3.3

bhuvanmisra · #4 8th October 2008, 11:56 PM

interesting concept - hybrid amplifier!
Pacific Valve & Electric Company Hybrid Amplifiers

afj · #5 9th October 2008, 03:04 PM

there are quite a few hydrid amplifiers around the market. whats interesting is that the bada 3.8 come with 80 watts pure class A amplification. normally clas s A amplification is limited to approx 20 watts

odyssey · #6 9th October 2008, 07:31 PM

In class A the amp dissipates about 3 x times the heat of continuous rated power output whether music is playing or not. In fact it dissipates more when there is no input signal, having said that with a 80W class A, that translates to 240 W of heat. I am pretty confident (from the photo) that 3.8 does not have this kind of a conventional heatsink. 240W of heat is a lot and very very few amps can do this. If it has a fan internally to help in cooling then its a different matter (most amps dont have this due to fan noise). even with a fan, I doubt the heatsink has that capability. Take a look at the classic Aleph 3 from Pass labs, look at the heatsinks, this is a classic example of what type of heatsinks a Class A requires

cheers

Quote:

Originally Posted by afj

there are quite a few hydrid amplifiers around the market. whats interesting is that the bada 3.8 come with 80 watts pure class A amplification. normally clas s A amplification is limited to approx 20 watts

afj · #7 9th October 2008, 08:02 PM

Quote:

Originally Posted by odyssey

In class A the amp dissipates about 3 x times the heat of continuous rated power output whether music is playing or not. In fact it dissipates more when there is no input signal, having said that with a 80W class A, that translates to 240 W of heat. I am pretty confident (from the photo) that 3.8 does not have this kind of a conventional heatsink. 240W of heat is a lot and very very few amps can do this. If it has a fan internally to help in cooling then its a different matter (most amps dont have this due to fan noise). even with a fan, I doubt the heatsink has that capability. Take a look at the classic Aleph 3 from Pass labs, look at the heatsinks, this is a classic example of what type of heatsinks a Class A requires

cheers

thats what amazes me. at 80w it switches over to class AB and goes up to 138w. i've read on a forum from someone that uses it - he says it beats most amps in the 5k usd range. and have checked a few other chinese amps as well. its pretty common for their 'audiophile' amps to do 80w pure class A from their specs. these amps are pretty heavy though - come in at 90lbs or so

afj · #8 9th October 2008, 08:06 PM

http://www.jungson.com.au/files/revi..._uk_review.pdf

check this review out. another pure class A amp with specs at 80 watts and reviewer tests showing 115w

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