Help choose best amp/preamp combo?


Hi there
I am new to audio forum.Helo every one here can help me.I do build a 2 channel stereo with JBL sub.here is my system :Parasound a21 amp + Emotiva xsp1(gen 2)+ pair of B&W 805 Nautilus.To be honest, I do loved the sound system very clear and crisp on high and midrange with powerful bass tights.but it is LACKing of Warm sound.I do loved the warm sound is top priority.couple months ago I do have Rotel 1095 amp pair with Rotel rsp1570 + b&w cdm1 Nt sound is clear crisp and WARMER but sound is THIN compare to Parasound.but Rotel sound is warm which I like much.I also heard that Parasound a21 is warm sound too.but in my taste it is not.my question is the amp do produce a warm sound or Pre-amp produce a warm sound or the speaker do make the sound warm?I am confused and I want change my system to Rotel rb1582mk2 + Rotel rc1580 pre-amp because I heard that B&W speaker and Rotel is relate to each other and their product is matching together in sound.especially BW speakers is sound good with Rotel amp.is this true.and how you guy advised me to keep Parasound a21 and changing Pre-amp to either Parasound P5 or Rotel rc1580? Or go full system with Rotel like Rotel rb1582mk2 + Rotel rc1580?I am confused now and need your help.Thank You in advance.
128x128luckyrainbow63

Showing 2 responses by erik_squires

Rotel and B&W do business together, but I don’t think they a particularly good match, any more than Krell is (yeah, that’s my opinion).

Given the usual tonal balance of the B&W nautilus line, I’d say you probably need genuine tone controls such as from a DiracLive or miniDSP type of solution. This being Audiogon no one wants to hear that, so let’s stick with the really expensive options.

Parasound amps are very neutral to a touch warm. I lived with a pair of the A23s and really liked them.

If I had to change the sound with changing equipment I would say change your preamp. The Parasound P5 should be skipped in favor of the P7 or JC2 if possible. Neither is a tube pre-amp but the P7 is neutral and open without actually being warm or cool with built in bass management. If that’s not warm enough, try out a modern Audio Research, Conrad Johnson (old or new) or any other tube pre.

I would experiment, but of course doing so in your system if at all possible is what I would try.

Again, back to solutions that are pretty expensive for the benefit, Wireworld speaker cables will also warm up the sound and help perceived imaging. Stick to the low to midrange cable for the warmest options. The good news is I think a place like the Cable Company will lend them to you.

Of course, something else that will affect the perceived tonal balance is room acoustic treatment. The more mid to high frequency damping you have, the more it will lower the perceived treble and warm up the sound, as well as improve imaging. GIK Acoustics is a great place for products and advice. 


Best,


Erik
One other thing to try of course is the treble control.  I would try turning it down a couple of notches.  This depends on how it's implemented though. They aren't all shaped the same.

Usually any impedance over 10k is considered high and acceptable by most preamps.  The more sensitive preamps will start to roll off high frequencies as the amplifier impedance drops or the volume control is changed.  Look at a couple of reviews at Stereophile. In the measurements you'll see this effect.

No modern solid state amplifier should care however, and many if not most can tolerate down to 600 Ohms.