Amp5 and Amp10

[modjibe]

What's the difference ? (Or what should I buy ??)

:-)

Thank you !

[V-bro]

AMP10 is the latest, AMP10 has more 'capacity' included...and features a 'dual mono' setup because it has separate rectifiers (and caps) for each channel...

If you're rich enough to afford two transformers AMP10 is a great choice..

------X-max. can be several meters on any driver, too bad it can be done only once...------

[modjibe]

But how will i connect the two transformers on the 230V ?

To make it easy, the amp10 is better than the amp5 but more expensive ?

[thomaseliot]

quote:Originally posted by modjibe
[br]But how will i connect the two transformers on the 230V ?

To make it easy, the amp10 is better than the amp5 but more expensive ?

I think that a first choice is to get a bigger transformer with two 22VAC secondaries. Amp 10 has two pads for each secondary wires. Bigger transformer are more stiff than smaller ones.

AMP10 is cheaper than AMP5 because it includes the high power add on (another couple of bulk caps and a rectifier).

[modjibe]

The 4 capacity in the amp10 aren't to much for 2 small 8 ohm speakers ? I'll buy a amp 10 if it is better for me, and amp5 if not !

[thomaseliot]

quote:Originally posted by modjibe
[br]The 4 capacity in the amp10 aren't to much for 2 small 8 ohm speakers ? I'll buy a amp 10 if it is better for me, and amp5 if not !

Capacitors are not a mean to play louder, but a reservoir of energy in transients an complex musical passages. Generally, the more, the better. Some people use exaggerated 15000uf-20000uf bulk caps even wit small amps, to have more stability.

[dima]

quote:Originally posted by V-bro
[br]AMP10 is the latest, AMP10 has more 'capacity' included...and features a 'dual mono' setup because it has separate rectifiers (and caps) for each channel...

Are you saying that a single AMP10 itself is constructed/works like two mono amps, one for each channel, or are you talking about the bridged mono configuration that this amp allows? Thanks.

[nwell]

The class T amps are drawing high freqs current and I was told it was best to use several low ESR caps in parallel to reduce internal resistance of the PSU. I choosed not to use swithing power supply, but a classic one.
For my 2XAMP11 , I put per channel (33V PSU):
1 X 99000µF
4 X 2200µF low ESR
2X 15µF MKT caps thinking it would reduce internal resistance in the high freqs.

The 99000µF might be overkill for some ... but so far I'm very happy with the listening results.
Now, I have not made yet check with an oscilloscope my PSU when loading the amps ... I should do it some day.

The thing is that commercial high end amps have usually a tremendous reserve of energy in caps (I think of some tube amps from Audio Research) and it is usually said that whatever good schema you have, if the PSU is neglected ... the outcome will be poor.

nwell

[modjibe]

Ok guys ! I'm a little bit confused ! Make it easy please ! Amp5 or Amp 10 ? We can do a vote !

[chris4916]

I'm not sure this is a matter of vote.
Basically, both are the same (for what I understand) except componenets organization on the board and some components that are removed (relay) while power rails are changed for 2 rectifiers.

My understanding is that AMP5 can have 2 rectifiers too, but in parallel while I guess we have now on AMP10 one rectifier for +V and one other for -V (or one for left channel power rails and one for right channel but this doesn't make sense to me when looking at Tripath schema... Am I wrong ?)

I feel LM317 is in a better place now as it can benefit from same heatskin than main one for Tripath chip.

Another point that makes difference (from my point of view, assuming what I guess is correct...): AMP 10 looks more flexible in case you want to change from stereo to bridged mode, thanks to jumpers.
Furthermore, one could have better, or rather said, different muting management due to external relay. Does it authorize to design something merging different relays control in case of multi-channel or even mix mute management with softstart...

Thus if you don't need these new features, you can go for AMP 5

Again, this is only my (newbie) poor understanding

Cheers

Christian