USHER P-307A Pre Amplifier R1.5 Class "A" Power Amplifier

http://www.davewhitter.pwp.blueyonde...for%20sale.htm

Loads info at link £2,800 new want £1,500



--
Dave
www.davewhitter.myby.co.uk

Music is Art - Audio is Engineering
Steam is Fun

In article ,
Dave xxxx wrote:
USHER P-307A Pre Amplifier R1.5 Class "A" Power Amplifier

http://www.davewhitter.pwp.blueyonde...for%20sale.htm

Loads info at link £2,800 new want £1,500

Doesn't half talk some ****e. Pre-amp is protected from the AC supply by
using a separate DC one. Just like any amp...

'Main amp is biased into pure class A' - except that it isn't.

--
*Some people are only alive because it is illegal to kill.

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman

Doesn't half talk some ****e. Pre-amp is protected from the AC
supply
by using a separate DC one. Just like any amp...



they mean protected by being in a separate box

In article ,
Dave xxxx wrote:
Doesn't half talk some ****e. Pre-amp is protected from the AC supply
by using a separate DC one. Just like any amp...

they mean protected by being in a separate box

Which is no more than an advertising gimmick. The best power supplies have
a very low impedance output - which means minimising cable length and
connectors.
Good quality transformers etc emit little in the way of external fields
and can in any case be screened.

--


Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:
Which is no more than an advertising gimmick. The best power
supplies
have a very low impedance output - which means minimising cable
length and connectors.
Good quality transformers etc emit little in the way of external
fields and can in any case be screened.

Interesting point of view, not looked at it that way myself

Would by what you say, would I be right in saying you do not think
Naim seperate power supplies are a good idea then ?

In article ,
Dave xxxx wrote:
Interesting point of view, not looked at it that way myself

Would by what you say, would I be right in saying you do not think
Naim seperate power supplies are a good idea then ?

Just another marketing gimmick.

You don't find even the very highest quality recording consols with one
power supply per channel - and crosstalk here could have far more serious
consequences than in a domestic pre-amp.

--
*Most people have more than the average number of legs*

Dave Plowman London SW
To e-mail, change noise into sound.