what are the effects on amp due to biwiring?

multifidus11

Can anyone tell what biwiriing does to impedance, current, and wattage of the amp?

jegs

nothing.

dragon1952

That is correct. The amp still sees the same load.

ward91

if you think about bi wiring all it does is moves the brige of the tweeters and the bass/mids to the back of the amp rarther than those stupid annoying little metal things

multifidus11

thats what i was thinking. how does biwiring bypass the internal crossover that is inside the speaker? really if you do biwire or biamp shouldn't you remove the crossover?

janmike

So have you folks noticed any huge difference using jumpers as opposed to bi-wired cables? I am currently using Signal Cable Ultra Speaker Cables and I was thinking of purchasing some jumpers instead of new cables that are bi-wired. I will be using them on the LSi9's. Noticed some Mathura audio Premium Bi-Wire jumpers and wondered if they were any good.

honestaquarian

multifidus11 wrote:

thats what i was thinking. how does biwiring bypass the internal crossover that is inside the speaker? really if you do biwire or biamp shouldn't you remove the crossover?

It doesn't bypass the crossover.Only active biamping does that.Active meaning you are using an external electronic crossover and sending the band limited signals from the crossover to each amp.

multifidus11

honestaquarian wrote:

It doesn't bypass the crossover.Only active biamping does that.Active meaning you are using an external electronic crossover and sending the band limited signals from the crossover to each amp.

if one does actively biamp with an external crossover and multipule amps, would it then not be wise to remove the internal crossover entirely?

honestaquarian

multifidus11 wrote:

if one does actively biamp with an external crossover and multipule amps, would it then not be wise to remove the internal crossover entirely?

Yes,but you would be HARD PRESSED to find all of the mentioned components nowadays.

unc2701

honestaquarian wrote:

Yes,but you would be HARD PRESSED to find all of the mentioned components nowadays.

You'd be hard pressed to find them cheaply, but active and pseudo-active crossovers aren't that hard to come by. Anyhow, you could remove the crossover entirely, but you'd probably want to put back in a zobel network- it levels off the speaker impedence.

honestaquarian

unc2701 wrote:

You'd be hard pressed to find them cheaply, but active and pseudo-active crossovers aren't that hard to come by. Anyhow, you could remove the crossover entirely, but you'd probably want to put back in a zobel network- it levels off the speaker impedence.

Fascinating.

ward91

honestaquarian wrote:

Yes,but you would be HARD PRESSED to find all of the mentioned components nowadays.

just bypass the crosover because inside of my speakers the crossover is screwed onto the binding posts, just undoo it cut the conections and re conect them
but yes crosovers do change impedence but if you are patient active crosovers arnt expenisie on ebay

multifidus11

ward91 wrote:

just bypass the crosover because inside of my speakers the crossover is screwed onto the binding posts, just undoo it cut the conections and re conect them
but yes crosovers do change impedence but if you are patient active crosovers arnt expenisie on ebay

how is the quality of polks crossovers inside the RTi 12, CSi5, and FXi5. This being my system i am upgrading amps and am deciding what route i want to go:either with an external crossover and multiple amps or a good preamp and multichannel external amp. if i go with say the outlaw pre990/7700amp. should i just biwire and upgrade the internal crossovers, or should i go another route? i would appreciate suggestions i would like to keep the amp upgrade to no more than $5000.

ward91

i think i would just leve the inerds alone and just bi wire it all . to say i joined polk audio i dont know a lot about polks, so i could be wrong. i know some people upgrade crossover components, thats not expensive at all

ohskigod

new speaks? I say abandon the external crossover/active biamp thing.

I say go the outlaw route, I've never had an outlaw piece let me down. (great quality/great price)
Leave the crossovers alone dude. you will void the warranty I'm sure, and will probably be surprised as to what good external amplification will do for those speakers, particularly the RTi12, which is known to be a bit power hungry. Biwire is perfectly fine, remove the jumpers of course, but I'm sure you allready knew that

multifidus11

ohskigod wrote:

new speaks? I say abandon the external crossover/active biamp thing.

I say go the outlaw route, I've never had an outlaw piece let me down. (great quality/great price)
Leave the crossovers alone dude. you will void the warranty I'm sure, and will probably be surprised as to what good external amplification will do for those speakers, particularly the RTi12, which is known to be a bit power hungry. Biwire is perfectly fine, remove the jumpers of course, but I'm sure you allready knew that

i like your set up and i am not sure if i should use a variety of different external amps or just the outlaw 7700, with wattage a little low for the rti12s and a little to high for the fxi5. any sugguestions about how to approach this. i really want to make the rti12s sing, but don't want to fry my surrounds if i crank it in 5 channel stereo?

ohskigod

you wont fry the surrounds just by virtue of overpowering. by far, underpowering a speaker is more dangerous than overpowering (due to the amp clipping = nearly instant fried driver)

I dont know if the outlaw your looking at is 5 or 7 channels. if it is 7, then biamp the main with 4 total channels, and then use the others for the center and surrounds (in a 5.1 system)

even if you go 7.1 channel down the road, just pick up a couple of the outlaw monoblocks, and voila.

if the amp your looking at is 5 channel, I'll say that having the same power going to the RTi12 and the surround speaker is really no big thing. makes calibration a little easier most likley. again, if your worried, just pick up a couple of the outlaw monoblocks and biamp the mains with 2 channels of the main amp.

in summary, if your running 5.1, you would need 7 channels of amplification under this plan (the mains biamped = 4 channels, center = 1, surrounds = 2)

if your running 7.1, you would need 9 channels (mains = 4 center = 1 rear surrounds = 2, side surrounds = 2)

this is with saying that a 5 channel X 200 watt amp is more than adequate for the set up you listed in my opinion.

multifidus11

ohskigod wrote:

you wont fry the surrounds just by virtue of overpowering. by far, underpowering a speaker is more dangerous than overpowering (due to the amp clipping = nearly instant fried driver)

I dont know if the outlaw your looking at is 5 or 7 channels. if it is 7, then biamp the main with 4 total channels, and then use the others for the center and surrounds (in a 5.1 system)

even if you go 7.1 channel down the road, just pick up a couple of the outlaw monoblocks, and voila.

if the amp your looking at is 5 channel, I'll say that having the same power going to the RTi12 and the surround speaker is really no big thing. makes calibration a little easier most likley. again, if your worried, just pick up a couple of the outlaw monoblocks and biamp the mains with 2 channels of the main amp.

in summary, if your running 5.1, you would need 7 channels of amplification under this plan (the mains biamped = 4 channels, center = 1, surrounds = 2)

if your running 7.1, you would need 9 channels (mains = 4 center = 1 rear surrounds = 2, side surrounds = 2)

this is with saying that a 5 channel X 200 watt amp is more than adequate for the set up you listed in my opinion.

the 7700 it 200wx7 and i was thinking along the same line as you in regards to using 4 channels (the main two and two of the 4 surrounds). this will work fine when the signal is coming from a two channel source such as a cd, where the preamp sends the same signal to all 7 channels. but won't i have a problem when i am watching a dvd encoded in 5.1 where the preamp splits the two surround signals into 4. at the point shouldn't i disconnect the surround cannel leads going to the rti12s and replace the jumpers. this would be way to much of a pain in the ****. i hope this makes sense. please advice if it does

multifidus11

or do i just split the signal for the mains on the way from the preamp to 4 channels on the 7700. how would i do this if i upgraded to balanced cables?