LSi 15's and Bi- amp Vs. Bi wire

nemos2

With the polk Lsi 15's is it better to Bi amp ( 1 channel from the amp per binding post pair, or 2 channels total) or bi-wire (1 channel from the amp to both pairs of the binding posts).

Do the LSi 15's have an internal cross over that will direct the signal correctly if they are bi-amped? Or is Bi-amping the LSi 15s just sending them more power?

I am a little confused on this one.

Thanks for the help

steveinaz

If it were me, I'd bi-amp for best results. Use 1 amp to power your woofers and 1 amp dedicated for high/mids.

Usually, bi-amping will provide more noticeable results than bi-wiring--and its been my own personal experience as well. But BEST results are attained when each amp is dedicated to specific drivers (frequency ranges), rather than simply using 1 amp for left and one amp for the right (which is a waste of time and money).

mantis

I don 't think they need to be bi amped.I personally think if your going to bi amp,you should use the same exact amp for both.But with how good amps are today,I feel no need for this.

I personally think a higher quality amp would yield better results then 2.

I bi wire my Lsi15's.I have found that bi wiring clears up the sound.Keeping it simple,it sounds clearer.

The Lsi 15's need a high quality amp to drive them.Good clean power.High power I feel isn't nessary but high current I fell is a must.

Dan

nemos2

Ok, so Bi-amping is better. If the amp in question is the outlaw 770, ( 7x 200) how do you set it up so that each input to the speaker is " dedicated to specific drivers ". HOw is this accomplished. with outputs for only FL and FR how do you split the signal and then amp it off 2 channels?

Once it gets to the speaker, how is the signal handled at the speaker?

Second question : If you Bi-wire, does the amp see a 4 ohm load or an 8 ohm load?

thanks for the help.

steveinaz

Bi-amping is usually done with 2 amps, though you could conceivably use 2 A & B speaker outputs (if available) from a single amp. I don't know how well this would work.

What it involves is first removing the shorting strap between the binding posts on your speakers, then running one set of cables (amp 1) to the lower set of binding post on your speakers (bass), and another set of cables (amp 2) to the upper posts (mid/highs), observing polarity through-out.

Bi-wiring doesn't effect the impedance seen by the amp. An 8 ohm speaker bi-wired, will still present an 8 ohm (nominal) impedance to the amp on each run of wire.

nemos2

OK, sorry steveinaz, I am still confused. Talking in terms of seperates ( a Pre-processor and a seperate amp ) From my pre I send FL to one of the seven channels in the amp, FR to another channel in the amp. So that means 1 speaker cable running to each of the speakers.

To Bi-amp ( not Bi-wire) I would be running 2 speaker cables to each of the speakers, one for each pair of binding posts. My question is two fold I guess,

A.) How do you go from 1 output on the pre-processor to 2 inputs of the AMP?

B.) At what point ( and how ) does the audio signal get split up into its different parts so that you can send a dedicated signal to specific drivers.

P.S. Aren't the LSi 15's 4 ohm speakers?

thanks for the help

bld

Hi just joined the forum to find out some answers to the same question,i think the best way to split the signal would be taking the right and left front from the pre amp splitting them there,then proceeding on to the amp to the inputs,i am going to use the surround inputs on my amp to power the frnts as well,since i don't feel the side surrounds do much and would be of more value at the front
Hope this helps
Barry

i see a thumbs down,is this the incorrect way,please advise.

jimmydep

bld wrote: »

Hi just joined the forum to find out some answers to the same question,i think the best way to split the signal would be taking the right and left front from the pre amp splitting them there,then proceeding on to the amp to the inputs,i am going to use the surround inputs on my amp to power the frnts as well,since i don't feel the side surrounds do much and would be of more value at the front
Hope this helps
Barry

i see a thumbs down,is this the incorrect way,please advise.

Hi Barry, Welcome to the club........The thread your posting in is 6 years old........But keep searching, there are many good threads on this topic..

Jim D

olilugo

Some amps are design so that you can bi-amp or bi-wire. The sunfire is such an amp.
in my case I have a TGA-5200, if I were to use it in bi-amp the amp becomes a 3 channel amp: bi-amp fronts, plus sigle center.

I rather use it as bi-wire and use all 5 channels.

looking at the 7700 manual they don't even mention bi-amp/bi-wire.

There is a possible way to add bi-amping, I think, I have never tried. you might want to look into this.

looking at some AVR's that support bi-amp, by using the SBR, and SBL. in combination with the R, L. I am thinking that if you were to use the interconnects from the SBL, and SBR to your amp and then use these speakers outs + the speaker outs from L, R from your amp to feed the high and low of each main spakers.

RJMELKON

imho biwire or biamp produce no benefit

praedet

All you have to do to bi-amp your speakers using the 7700 is run a splitter off the right and left output from the preamp (some preamps have the ability to switch the rear surround outputs to front output too) and run two signals for each side to four of the inputs on the 7700. Then you run the speaker wire from each of those inputs to a different set of binding posts on the back ofr your speakers with the jumpers removed. make sure that the split right side has both wires going into the amp, and leaving the amp, and going to the right speaker, etc.