Which digital amp? JVC, Teac or Panasonic?

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_scotty_

Which digital amp? JVC, Teac or Panasonic?
« Reply #20 on: 2 Nov 2004, 02:33 am »
The Chair Guy has it right.  Inadequate power supplies as well as under specified output devices are part of the problem. An analogue amp has no brain and will suffer the same speaker matching problems when it is made as cheaply.  It pays to remember that
these products are built to a price point, and a low one at that. The transparency comes from the ultra low output impedance and in the case of the TI chipset the fact that the amp is chip based with only the outputs being discrete  parts. The H bridge output also eliminates waveform distortion due to deadband time. The Tripath has its sound from the low output impedance
and feedback with a very low propagation delay which means that it is more accurately applied.  The Tripath is also a chip type amp with discrete outputs.  As long as the inexpensive amps are produced without adequate
power supplies and large enough output devices they will not be universally
recommended for all situations and loudspeakers. It is almost something for nothing but not quite.  Scotty

mcgsxr

Which digital amp? JVC, Teac or Panasonic?
« Reply #21 on: 2 Nov 2004, 02:39 am »
If it is worth saying, it is worth saying 4 times!  :o

Mark in Canada

Ears

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Which digital amp? JVC, Teac or Panasonic?
« Reply #22 on: 2 Nov 2004, 05:26 am »
There is a modified Pany 45 at www.audiogon.com for 450.00 if you act quick.

It has the Jensen and Blackgate caps in the power supply,Rubycon zl series caps for signal, an iec socket and WBT posts for the main 2 channels.

If I did not already have two being modified, this one would be long gone.

I don't know the owner but he has good feedback at audiogon and an is a Asylum member.

Greg

mcgsxr

Which digital amp? JVC, Teac or Panasonic?
« Reply #23 on: 2 Nov 2004, 02:59 pm »
Tomek, I would say that the Panny (either 25 or 50) is likely the easiest to buy in Canada - I have seen several at Future Shop, whereas the JVC and Teac both require cross border shopping, and with the current border hold ups, that can dramatically increase lead time.

Now, as for what sounds best, or what would be best for your application, that is harder.  I have not heard the JVC yet, I have lent it to JLM in Michigan.  I have only heard the Panny at Future Shop, through some HK surround system - the salesperson was very impressed with how loud it would go... As for the Teac, well I am likely biased there - I own two, and have invested $$ to have Wayne mod one.

That all said, my speakers are FAR less efficient than yours, so it is difficult to translate my experiences to yours.

If I were you, and you are concerned about what you end up with, I would borrow my stock Teac, to get an ear on it for free.  If that does not go well enough for you, you can then buy the Panny at the Future Shop to get an ear on that.  

If, after hearing both, you are still not interested, then I would think that you don't like the sound of digital, or it simply has no synergistic match in your system.

Sound fair?

mark in Canada

tomek

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Which digital amp? JVC, Teac or Panasonic?
« Reply #24 on: 2 Nov 2004, 03:09 pm »
that's much better than fair!

i'll take you up on it and i didn't know that future shop and its great return policy had these units available too.

woohoo!

mcgsxr

Which digital amp? JVC, Teac or Panasonic?
« Reply #25 on: 2 Nov 2004, 03:14 pm »
You can get ahold of me, and borrow the stock Teac and PS Audio preamp (if you want) this week - I won't have much chance to listen, but would like them back in one week or so.

PM me.

Mark in Canada

AphileEarlyAdopter

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Which digital amp? JVC, Teac or Panasonic?
« Reply #26 on: 2 Nov 2004, 10:44 pm »
Scotty,
If I am not mistaken there is no feedback in the TI Equibit architecture. They have what they call as 'feed forward' . Dont know what it is. Never read it in my EE courses. I think lack of feedback is one of the main reasons it is not able to handle difficult loads, as we know that the power supply and parts are poor in these budget components.  Does the TACT handle low impedence loads ? It has better power supply etc.

mcgsxr

Which digital amp? JVC, Teac or Panasonic?
« Reply #27 on: 3 Nov 2004, 12:01 am »
Interesting, since my Teac has been driving my 4ohm Totem Rokk now for getting on four months now - mind you, these are no Maggies when it comes to a difficult load, but the Teac drives 4ohm loads for sure - I would comment that there are improvements to be made in the PS here also, so it could just be their particular implementation works a little better with lower impedance loads, or the Totems are a really benign 4ohm load - not sure which is the case.

Mark in Canada