Another bi-amp question.....................

EricH

I'm thinking of bi-amping my front soundstage and wondered how drastic an improvement I would hear. Right now I'm running RTi70's and a CSi40 with a HK AVR630-75 watts per channel. My idea was to power the tweeters with an HK PA2000-45 watts per channel, and power the low-end with the 75 watts from the receiver. Big improvement, small improvement?

hellotheworld

I would say it depends... , however I did not have much experience...

I tried to bi-amp RTi70 using the A-B output sets of onkyo 501, there almost no difference. But the problem with onkyo is that when all channel driven, output is only about 35wpc according the data on the internet (it says 65W with channel driven in the manaul).

You can always try...

sowen010599

A/B bi-amping is not bi-amping, it is bi-wiring. All an A/B output does is split the output from the front mains to two sets of speakers. It does not add another amplifier channel. Beyond that, some "lesser" receivers add a 4 ohm resistor to the output when A&B is selected because if there were actually 2 sets of speakers connected to that channel, it would be seeing a 4 ohm load instead of 8. Some "lesser" receivers can't handle a 4 ohm output. So, your front channels could have been seeing a 12 ohm load instead of 8 ohms. That would cut the power sent to your speakers down about 50%. Only 4 ohm stable amplifiers can truly power 2 8 ohms speakers on the same channel.

Bi-amping can be beneficial, but only to some extent. Some speakers love bi-amping (ie RTi10's and 12's). With others, it doesn't matter so much. Most often, you are better off with one high powered amplifier than two lesser amps.

Early B.

I'm thinking of bi-amping my front soundstage and wondered how drastic an improvement I would hear. Right now I'm running RTi70's and a CSi40 with a HK AVR630-75 watts per channel. My idea was to power the tweeters with an HK PA2000-45 watts per channel, and power the low-end with the 75 watts from the receiver. Big improvement, small improvement?

I tried that a year ago with the same speakers and HK amp. It's not worth doing, IMO. It didn't sound right and the nominal increase in power was not sufficient to warrant bi-amping. I suggest getting a much more powerful amp for your fronts and forgo bi-amping altogether.

astorpiazzola

the pa2000 ouput is 2 bridged channels of 100w rms or four channels of 45w rms.

I tried bi-amping a pair of rti10 with the 75w rms(highs) of my avr525 and the 100w rms of the pa2000(lows) and it was a great improvement.but it creates a unbalance in the natural ouput of the speaker caused by the unequal power ouput of the amps.

your best bet would be to bi-amp your fronts with the front channels of your avr630, and the multi-room or surrback channels.That way you will have bi-amped speakers with the same amount of juice.For the surr-back, you could either bi-amped them with the four channels(45wrms) of the pa2000 or single amped them with full 100w rms.

The pa2000 is a great power amp with good capabilities(like the auto trigger). It's high current capability works great (45 amps).I run 2 dual voice coiled 12" P3 rockford fosgate subs with my two pa2000 and they work great.Each of the four 100w rms channels on a coil drive my house nuts!!!!

I now bi-amp rti10s for the front part of my system with the front and the surround channels of my avr8000.And i also bi-amp a pair of rti10 for the surround part of the system with my avr525(front and surr channels).It's balanced and punchy and gets the full potential of the rti10s.

hamzahsh

Bridge your PA2000 to 2-ch (2 x 100w) and bi-wire your speakers to it.

astorpiazzola

i think he would be better off amping the rti10 with four channels of the same wattage.So using the avr630 front and multiroom channels(4 X 80w rms) to bi-amp and the pa2000 for surrback!
simple and right for good results! and the rti10 will be balance.