2. amps-preamps
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using different amps for Bi-amping ,any good ?? l

Hi, Having done upgrading my spkr and amps;next thought of Bi-amping my spkr(Bi-wireable).My current amps- all tube Preamp(with 2 set of Pre-Out) and Hybrid Amp(160Wx2).
My question is : How about using 2 different type and different power out put amp for Bi-amping ? Any good ?? (I mean I still have my NAD C370/120Wx2,SS,can be use as power amp;it also has 2 set of Pre-Out socket)
Your opinion and suggestions would be highly appreciated and thanks in advance
Simon
simonleemd
eldartford
4,262 posts
 
The woofer and the tweeter are very different devices. The driver differences will make any power amp sonic difference insignificant. Select amps for other reasons.
ghostrider45
449 posts
 
Make sure you have the ability to adjust the gain of each power amp independently of the other.
tobias
1,534 posts
 
Biamping sounds like it would be a great idea, especially active biamping, which cuts the IM distortion of the speaker's crossover out of the system. However in my small experience (listening to Linn systems) it is not always the best choice. To my ear, two LK85 amps in a passive setup with Keilidhs did not offer a lot over a single LK140. I conclude that as a general rule, one great amp will make two ordinary amps sound dull. I would put the money towards better stereo amplification first.

IMHO biwiring is for when you have already got an amp that makes you very happy indeed, and you want even more of the same.
simonleemd OP
29 posts
 
Hi, Tobias. I have seen some unfavorable result from B-wiring : said would reproduce less/meaner Bass ,some said the sound is not as coherent as with Single-wiring . How much is truee of these reports? Would like to have your(so as other readers) opinions on these ,please.
Thanks in advance
Simon
tobias
1,534 posts
 
Hi Simon, I have heard biamped setups that did not have the problems you describe. In particular I would not expect less coherence across the midrange ; rather the contrary.

I think biamping is definitely worth considering. My very humble opinion though, is that it is not worth considering as a priority until you have reached a very high level of performance with conventional amplification. I feel you can do more for less money at an early stage by simply upgrading a two-channel amp. Since biamping means doubling the cost of your amp, consider it this way : how much better a power amp could I get for twice the retail price of my present amp?

I have also heard biamped setups using dissimilar amplification--solid state on the bass and tubes for the treble--so I know it can be done. The guys had worked for months and months on the sound, tweaking crossovers, reworking the amp designs... if you are ready for this kind of fun, that's great.

I think passive biamping with dissimilar amps has enormous potential for disaster.
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