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Amplifier "voice matching"

807 Views 14 Replies 7 Participants Last post by  petergaryr
I've had a Crown K1 amp connected to my Denon 2805 for quite a while (bought under the "more power is better" concept). I've recently pulled it out of the system and was playing some CDs and noticed how much smoother the sound was using just the Denon amps.


The Crown was adding a somewhat harsh coloration to the overall sound. That got me to thinking. I've often advised those who ask about speakers for HT to ensure that they are voice matched in order to create as seamless a soundfield as possible.


What I hadn't considered up to this point is the effect of adding an amp with different tonal characteristics to just the mains. While the pre/pro/amp combination may work well for stereo listening of CDs, a mismatch could cause all sorts of issues when listening to HT.


So, with that in mind, if I were to add either a Rotel or Parasound amp to the system in place of the Crown, of the two which would you consider the better tonal match for the Denon?
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I've had good match with a small, Krell KAV 300i integrated amp with my Denon 5600 before.


Just my 2cents, BK
Well, the Krell was a bit beyond my budget. However, I did finally settle on the Rotel RB 1070. After reading a number of posts on the Klipsch forum, It seemed as though a number of people thought that the Rotel/Klipsch combination worked well together.


Klipsch can be a bit "in your face". The Rotel is somewhat laid back. The combination of the two presents a combination that highlights the best features of both.


Listening to 7.1 surround, the blend of all the speakers is better than with the Klipsch/Crown K1 combination. This has been an interesting experiment.
But don't you know that all amps are the same in terms of sound derived? :D


I know this because there are many on this very board who have repeatedly said so. :rolleyes:


So let's recap, shall we?

Same speakers...same room...different amping...different sound...with three different amping sources. Hmmmmmm? I wonder how long it will take before someone mentions double-blind test?


Enjoy the Rotel.
>I wonder how long it will take before someone mentions double-blind test?


Or level-matching!
Quote:
Originally Posted by ClarkeBar
But don't you know that all amps are the same in terms of sound derived? :D


I know this because there are many on this very board who have repeatedly said so. :rolleyes:


So let's recap, shall we?

Same speakers...same room...different amping...different sound...with three different amping sources. Hmmmmmm? I wonder how long it will take before someone mentions double-blind test?


Enjoy the Rotel.
At least I was true to the advice I have always given others. I didn't even bother with a listening test in the store. It was a simple, "here's the credit card". Granted, I did the research first and read a number of opinions on Club Rotel and the Klipsch forum.


I am a firm believer that the only way to evaluate a new piece of equipment is to introduce it into exactly the same environment as the one being replaced (in this case the Crown K1). Even with sonic memory being the unfaithful friend that it is, I have enough "favorite" CDs that I can tell sound "different" now that the Rotel is in the system.


Whether that difference is a "good" difference or a "bad" difference will only reveal itself in time, and with extended listening. I can say this: the high end of the Klipsch seems a bit tamer, without being dull. There is still a great soundstage, a nice sense of "air" around instruments and voices, and pinpoint localization. I can see why other Klipsch owners seem fond of Rotel. So far, this seems like a positive change.


Just to add to the fun, the Crown K1 is now connected to a Yamaha in the bedroom that has an older set of Polk 800s. I'm still deciding whether I like that combination.
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Often less is better to some ears. A receiver can sound smoother sometimes because it is not giving you all the musical details of a more power amp, and the sharp leading edge of some notes is rounded off because the receiver does not have the dynamic capabilities to recreate it accurately. The trick is to find an amp that has all the power you need for dynamics and can still give you all the musical details without sounding harsh, even when you turn up the volume.
tonal match


Power level matching fixes many issues when you mix brands. Most people never do this

nor know how. If you want a matching system then use the same brand of amplification

rated for the same power levels.


More is better only if your speakers can hang :)
To your credit you did it the right way Peter. I don't doubt your ears for a second.


But the level matching both cneely8 and thylanter raise is a good issue . If not done accurately the sound can be altered. I assume you took note of this when switching units around.
Quote:
Originally Posted by ClarkeBar
To your credit you did it the right way Peter. I don't doubt your ears for a second.


But the level matching both cneely8 and thylanter raise is a good issue . If not done accurately the sound can be altered. I assume you took note of this when switching units around.
Oh yeah. I've been experimenting with a number of things lately (it is both a good thing and a bad thing to be reading threads on this forum!).


At one point I tried bi-amping the Klipsch by using the Denon for the tweeters and the Crown K1 for the mid/bass, with the dual SVS 20-39's handling everything below 80 hz. It is amazing how you can screw up the sound if you aren't careful.


The tonal characteristics of the Denon are very different than the Crown. That in itself introduced all sorts of anomalies. Aside from that, until I did the correct calibration between the tweeters and the mid/bass, I found I was sending more gain to the mid/ lower than to the tweeters. That was a fine mess.


Thing is, I don't recall in all the "new amp making me grin..." type threads or the "bi-wire vs bi-amp vs internal crossovers vs external crossovers vs [fill in the blank] ones any discussion of how you can wind up making things worse rather than better unless proper calibration is done at each step. It seems so obvious after the fact, but heck, I didn't break anything in the process.


Part of the fun of this hobby is the experimenting. At the very least, I've learned what NOT to do. :eek:
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Part of the fun of this hobby is the experimenting.


If you really want to accellerate the understanding, build your own speaker

and use a digital crossover {crossover, eq, delay} with one amp channel per

driver. This allows you to tweak endlessly in real time to help you understand

what parameters affect the sound and how. Once you mess with this, audio

becomes easy as the fog is lifted and you'll never desire to use the old method. :)
Quote:
Originally Posted by thylantyr
Part of the fun of this hobby is the experimenting.


If you really want to accellerate the understanding, build your own speaker

and use a digital crossover {crossover, eq, delay} with one amp channel per

driver. This allows you to tweak endlessly in real time to help you understand

what parameters affect the sound and how. Once you mess with this, audio

becomes easy as the fog is lifted and you'll never desire to use the old method. :)
There is a fine line between hobby and obsession. :D


With my obsessive personality (Monk is my hero), that would be all I would need to remove any contact with the family :rolleyes: .
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Quote:
Originally Posted by petergaryr
There is a fine line between hobby and obsession. :D


With my obsessive personality (Monk is my hero), that would be all I would need to remove any contact with the family :rolleyes: .
What I described is common in other audio industries, not so common

in home audio, but more folks in the home audio DIY worlds are entering.


If you aren't familiar with this method then it will appear alien, but it's really

really simple to do. I'm running my line array using this method.


source digital out -> digital volume control -> digital crossover/eq/delay -> amps ->

speakers.


I have control of many variables in real time at the listening position.
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Quote:
Originally Posted by petergaryr
The Crown was adding a somewhat harsh coloration to the overall sound.
Welcome to the club mate :D


Seriously Crown/Proamps might be the most neutral and accurate amps on the face of this earth but that still does not change anything for me. I could not live with their sound.


Rotel OTOH is the other extreme. My old speakers sounded fantastic to me with Rotel as well but deep down I knew this meant that these speakers are not my cup of tea so I eventually changed those to something to my liking. Now I can listen to the stuff as loud as I want without a hint of fatigue.


BTW in one way my expereince was different than yours. I could have lived with my old speakers and Crown if it was an HT only setup. The thing which really drove me away from these was 2CH stereo, which is pimary passion anyway. For you it looks like the other way around.


Just my 0.02.


Sincerely,

-dollarman
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Quote:
Originally Posted by dollarman
Welcome to the club mate :D


Seriously Crown/Proamps might be the most neutral and accurate amps on the face of this earth but that still does not change anything for me. I could not live with their sound.


Rotel OTOH is the other extreme. My old speakers sounded fantastic to me with Rotel as well but deep down I knew this meant that these speakers are not my cup of tea so I eventually changed those to something to my liking. Now I can listen to the stuff as loud as I want without a hint of fatigue.


BTW in one way my expereince was different than yours. I could have lived with my old speakers and Crown if it was an HT only setup. The thing which really drove me away from these was 2CH stereo, which is pimary passion anyway. For you it looks like the other way around.


Just my 0.02.


Sincerely,

-dollarman
Thanks!


Actually, 2 channel music was the primary motivator since that is my number 1 passion. In the limited amount of time I've had the Rotel, it is definitely more "musical" (whatever that means) than the Crown. The Crown K1 has raw power with 350 wpc, but the Rotel at 130 wpc just is a better match. It isn't always about the quantity, but rather the quality.


As for HT, when I was reading the "All Channels Driven" thread, it struck me that the ongoing debate there actually has some merit.


If I added an external amp to the mains, that would ensure that they would more likely be getting the rated power of the dedicated amp, leaving the Denon to supply the rest of the amplification for the center and surround channels. So far, that also seems to be the case.


Once again, the concept of using a receiver as a pre/pro along with an external, good quality amp seems to be proving true (to those who may be on the fence). However, now when the new threads pop up about this, I'm going to be adding the caution concerning "voice matching" of the external amp (though I'm not sure that is the best term to use).
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