Another Bi-amp question
jeremymarcinko
Posts: 3,785
Is it okay to bi-amp my rti's with my receiver and the power amp? Say, let the receiver power the top half and the power amp, power the lower. I would be using the L,R speaker out and L,R pre-amp out at the same time.
I understand this to be passive bi-amping and not the best method of bi-amping, but I am in the mood to do some tinkering. I just don't want to break anything.
Another thought. Probably another bad idea, but what if I treat the lower half of the rti 12's as subwoofers, and connect the power amp to the subwoofer outs of the receiver? I could set the crossover fairly high 120- 140 hz.
Being that the rti'12 is an 8 ohm loudspeaker, would passive bi-amp create a 4 ohm situation? My thinking separating the upper from the lower would also cut the resistance in half.
Thanks
I understand this to be passive bi-amping and not the best method of bi-amping, but I am in the mood to do some tinkering. I just don't want to break anything.
Another thought. Probably another bad idea, but what if I treat the lower half of the rti 12's as subwoofers, and connect the power amp to the subwoofer outs of the receiver? I could set the crossover fairly high 120- 140 hz.
Being that the rti'12 is an 8 ohm loudspeaker, would passive bi-amp create a 4 ohm situation? My thinking separating the upper from the lower would also cut the resistance in half.
Thanks
Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
Post edited by jeremymarcinko on
Comments
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remove jumpers first
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jeremymarcinko wrote: »Is it okay to bi-amp my rti's with my receiver and the power amp? Say, let the receiver power the top half and the power amp, power the lower. I would be using the L,R speaker out and L,R pre-amp out at the same time.
I understand this to be passive bi-amping and not the best method of bi-amping, but I am in the mood to do some tinkering. I just don't want to break anything.
Another thought. Probably another bad idea, but what if I treat the lower half of the rti 12's as subwoofers, and connect the power amp to the subwoofer outs of the receiver? I could set the crossover fairly high 120- 140 hz.
Being that the rti'12 is an 8 ohm loudspeaker, would passive bi-amp create a 4 ohm situation? My thinking separating the upper from the lower would also cut the resistance in half.
Thanks
It's usually ideal to use the same amp to drive the top and bottom halves to make sure the top and bottom halves are driven equally, i.e. to the same volumes.
As for driving the subwoofer outs of the receiver, if the crossover point of the woofers is let's say 500hz and you only feed the woofers 120hz and below, you'll be missing out on some bass information which won't be ideal. I would bet the woofers drive a bigger portion of the bass region and thus it's not recommended to do such a thing.
You will not create a 4ohm situation unless you wire two speakers in parallel, you connect two speakers to the same amp taps.
If you want to do some tickering you can always play around with adding and tweaking a sub. Do some RTA.2Ch Tube Audio Convert -
Yeah, I have no desire to add a subwoofer at this time. I had just moved from a 7.2 surround system consisting of Monitor70's, 50's,40's cs2 and two klipsch sub10's. My interest is purely two channel music at this point. I sold the Polk monitor/klipsch gear about a month ago and purchased the new Rti's from polk's ebay store. My intentions were to simplify things with two large towers for music, I do not watch many movies right now. The Rti's sound really nice with just the ATI even though it is only rated at 120 wpc. I do think there would be some benefit to adding a larger amp and I plan to at some point.
I am just in the mood to play a bit with the setup. I didn't want to damage anything by using the pre-outs and speaker outs simultaneously. I was thinking the bottom end crossover was around 120hz on the 12's, which led to the idea that the sub-outs would cover the spectrum.
As far as level matching, wouldn't the audyssey program take care of that, with the eq?
My biggest concern was that I would be putting a 4 ohm load on my receiver, but if thats not going to happen I probably give it a go, I have some free time today.Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant -
I would be using the L,R speaker out and L,R pre-amp out at the same time.
Can't do that.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
jeremymarcinko wrote: »
I am just in the mood to play a bit with the setup. I didn't want to damage anything by using the pre-outs and speaker outs simultaneously. I was thinking the bottom end crossover was around 120hz on the 12's, which led to the idea that the sub-outs would cover the spectrum.
As far as level matching, wouldn't the audyssey program take care of that, with the eq?
Audyssey won't take care of that. With different amps with different input sensitivities, they'll put out a different amount of wattage at any particular volume setting. So it's generally recommended you use identical amps to drive biamped speakers. As you mentioned earlier, passive biamping especially with a receiver when the amp is more than capable of driving the speakers is mostly moot. If you want to do just 2ch, perhaps a dedicated 2ch preamp is in your future?2Ch Tube Audio Convert -
Your right, a Pre-amp and larger Power amp is in the foreseeable future, but for now I have the avr. I see what your saying about the amps having different outputs, that makes sense. The specs show the Rti's Subwoofer Crossover at 120Hz, 12dB/octave low pass. It seems to me that in this case it is almost like setting up a couple of passive subwoofers with an external amp, as the vast majority of the FR is being directed to the upper half. I think I can get the levels close. As I mentioned I am just playing around here, as long as I don't break anything I will be happy.Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
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Might want to call Polk CS and order replacement drivers now....that way they'll be on hand.LOLHT SYSTEM-
Sony 850c 4k
Pioneer elite vhx 21
Sony 4k BRP
SVS SB-2000
Polk Sig. 20's
Polk FX500 surrounds
Cables-
Acoustic zen Satori speaker cables
Acoustic zen Matrix 2 IC's
Wireworld eclipse 7 ic's
Audio metallurgy ga-o digital cable
Kitchen
Sonos zp90
Grant Fidelity tube dac
B&k 1420
lsi 9's -
Yeah, I think I read somewhere the warranty does cover ignorance.Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
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Okay if I can't do that, then I wonder if I set the receiver to bi-amp, will the surround back pre-outs carry the L,R signal.Can't do that.
I have some things to try.Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant -
jeremymarcinko wrote: »Okay if I can't do that, then I wonder if I set the receiver to bi-amp, will the surround back pre-outs carry the L,R signal.
I have some things to try.
Yeah, you can do that but your still not gaining anything. Your still using the same amp in the receiver which in biamp mode uses all 7 channels, thus robbing some power from the other ones.HT SYSTEM-
Sony 850c 4k
Pioneer elite vhx 21
Sony 4k BRP
SVS SB-2000
Polk Sig. 20's
Polk FX500 surrounds
Cables-
Acoustic zen Satori speaker cables
Acoustic zen Matrix 2 IC's
Wireworld eclipse 7 ic's
Audio metallurgy ga-o digital cable
Kitchen
Sonos zp90
Grant Fidelity tube dac
B&k 1420
lsi 9's
