Class A amplifier with tonecontroller

[whoaru99]

I think there might be none from a listening perspective. But, from a practial matter I have a hard time envisioning a preamp restricting the signal in the way I've presumed it's meant.

Also, I've somewhat assumed in the case at hand that the mfg. made the preamp and power amp sections compatible with each other.

 

[JohnVF]

Its not just the internal circuitry of the preamp but also how well it is mated to the amp. Impedance/gain mismatches, etc. Obviously in an integrated the two halves should be well matched. But I have a hard time understanding how a separate preamp couldn't mess things up, instead of could. I've found that most preamps get things wrong, not right. A good preamp is worth a mint. Most suck. It took me the entire time I've been in this hobby up until last Sunday to find one that I really liked.

 

[whoaru99]

Whether or not you like the sonic characteristics doesn't necessarily have anything to do with the purely electrical capabilities of reproducing the electrical waveform peak, which is the aspect of dynamics I meant in my previous comment and where I think tpi10d was/is at.

In other words, if the slew rate of the preamp is equal to or greater than required to reproduce the peak waveform then the preamp isn't limiting dynamic range. This isn't difficult to achieve, AFAIK/IMO.

 

[JohnVF]

And I guess I'm saying is that not all gear produces those waveforms equally, and even if an amp is capable of it, so must everything else that is attached to it, as it does not perform in a vacuum, and needs the associated gear to work with it. The original comments was about perceived dynamics, from how I read it. What an amp can do, and what it does in the context of a system, are not always the same thing.

Anyway, where's Roberth...he started this

 

[Roberth]

Well the problem I got is when I hear single ended amplifier on 3-8 watts roundhousekicking huge push pull solid state amplifier with 400-500 watts... Gain from the preamplifier plays a much bigger role.

 

[JohnVF]

Well the problem I got is when I hear single ended amplifier on 3-8 watts roundhousekicking huge push pull solid state amplifier with 400-500 watts...

I've had that experience as well, such as with a lower wattage Class-A amps, or the Leben that I mentioned. And likewise, what everybody says about SET. But then I think we'd get in a pissing contest about specs on paper, and listening impressions. Potential, vs reality. The proof is in the listening.

 

[KentTeffeteller]

The SET is fine, but really full range efficient speakers don't always fit in small houses. Cornerhorns with a SET rule! Otherwise, Push-Pull is superb.

 

[mrjbq]

oh, yeah... of course! The Yamaha CA-800, CA-1000, CA-1010 and CA-2010 amps all offer switchable Class A, tone controls (dual turnovers on most if not all of them) with defeat, and variable loudness. Brilliant solution! They are good sounding amplifiers, too, even by modern standards...

One minor correction, I have the CA-2010. It is a great amplifier, however, it does not have the variable loudness. Neither does the 1010, if my memory is correct.
Most of the Yamaha receivers from that era do have the variable loudness. I have no idea why Yamaha left it off their best (at the time) integrated amp.
Any ideas as to why???

 

[JohnVF]

One minor correction, I have the CA-2010. It is a great amplifier, however, it does not have the variable loudness. Neither does the 1010, if my memory is correct.
Most of the Yamaha receivers from that era do have the variable loudness. I have no idea why Yamaha left it off their best (at the time) integrated amp.
Any ideas as to why???

Different target audience wanting different features? Just a guess. Or they felt it detracted from the sound in a unit that was going for SQ above features. (again, a guess). If you look at the A-1 integrated, it doesn't have variable loudness either.

 

[mhardy6647]

One minor correction, I have the CA-2010. It is a great amplifier, however, it does not have the variable loudness. Neither does the 1010, if my memory is correct.
Most of the Yamaha receivers from that era do have the variable loudness. I have no idea why Yamaha left it off their best (at the time) integrated amp.
Any ideas as to why???

oops... and there's even one in my living room (under a sheet, corpse-like).
Yes, you're right.

 

[Roberth]

Well I had the Marantz PM6004 in the house, it was to bright in its sound signature, but I discovered that I dont need a tonecontroller. So I switched to Rega Brio-R: wow just wow, it did a nice knockout on the marantz, way much warmer in the sound, very gentle and rolled off high frequencies, which makes this amplifier pleasent to listen to hours after hours.