Bi-wire my monitor 30's?

[AlphaWolf]

Given that my Polk Audio Monitor 30's support bi-wiring, and so does my TX-SR605, would I notice any benefit to doing this? Or would this just be a waste of time and wire?

Also how would this benefit anything since both sets of wires are going to be coming off of the same terminal on the receiver, yet are going to separate terminals on the speakers? This doesn't make sense to me.

Thanks

EDIT: Ok nevermind, I think I misunderstood the manual I was reading.

 

[Sheep]

No, it is just a waste of time, money, and braincells (because you loose about 5000 every time you bi-wire a speaker).

SheepStar

 

[fmw]

Also how would this benefit anything since both sets of wires are going to be coming off of the same terminal on the receiver, yet are going to separate terminals on the speakers? This doesn't make sense to me.

There you go. It doesn't make any sense to anybody except "believers."

 

[Kolia]

Aha.

I had ordered a set of bi-wire cables before I read more on the subject. So since I have them, I'll use them.

I wonder if I'll notice the time difference compensation between the woofer and tweeter now? 3 inches divided by the speed of light in a gold plated bridge is what? 2.5 to the power -8 second?

 

[AlphaWolf]

I was reading this also:

http://www.brilliancehifi.co.uk/how-to-bi-wire-speakers.htm

The idea behind it is reasonable, but it just doesn't make sense given that both wires are eventually going to be connected at the same point. Then I read something else that mentions using two separate amps which would make sense.

 

[rnatalli]

I wouldn't go through the bother either.

 

[Joe Schmoe]

it just doesn't make sense given that both wires are eventually going to be connected at the same point.

Correct. Sketch an electrical diagram, and you will see that it makes precisely no difference at all.

 

[Kolia]

In a single wired system unwanted mechanical and electrical resonances appear as distortion at both sets of speaker terminals. Due to the impedance of the speaker cables these distortions will not be entirely cancelled by the amplifier. Instead, they modulate between the two crossovers, degrading sound quality. With bi-wiring this interaction is minimised as signal distortion is 'seen' at the amplifier's output where it can be more effectively cancelled. Bi-wiring therefore presents a 'cleaner' signal at both the bass and treble speaker terminals, and because the high and low frequencies have already been separated, each has a minimal effect on the other - the bass does not overpower the delicate treble.

Lol. IMO, once the signal is out of the amp, it's out! What could the amp do to fix any type of distorsion at that point ?!?

 

[AlphaWolf]

Something I am not understanding about all of this though, is why does the Onkyo TX-SR605 allow you to specify whether the speakers are bi-amp or normal?

The 605 doesn't have any pre-outs...how would you add another amp into the mix without two receivers? And two receivers in one setup would probably sound awkward at best.

It just doesn't make sense why they put that option there. Or am I missing something?

 

[fmw]

Something I am not understanding about all of this though, is why does the Onkyo TX-SR605 allow you to specify whether the speakers are bi-amp or normal?

The 605 doesn't have any pre-outs...how would you add another amp into the mix without two receivers? And two receivers in one setup would probably sound awkward at best.

It just doesn't make sense why they put that option there. Or am I missing something?

There is some justification for biamping in some situations but almost all those situations would be beyond a home theather in a typical family or living room. It would be completely beyond a home theater with a powered subwoofer which accomplishes exactly the same thing.

However, the entire high end audio business is based on beliefs, not truth or science. The manufacturers, in order not to eliminate their products as candidates for purchase by "believers" include those features.

 

[mtrycrafts]

I was reading this also:

http://www.brilliancehifi.co.uk/how-to-bi-wire-speakers.htm

The idea behind it is reasonable, but it just doesn't make sense given that both wires are eventually going to be connected at the same point. Then I read something else that mentions using two separate amps which would make sense.

In a single wired system unwanted mechanical and electrical resonances appear as distortion at both sets of speaker terminals.

This is from that link. What mechanical resonances are they talking about? Or, electrical, for that matter?

Cable distortions???? That has been measured and is at the limits of today's measuring instruments, -140dB to -160dB. Looks like the limiting factor is the instruments.

 

[mtrycrafts]

I wonder if I'll notice the time difference compensation between the woofer and tweeter now? 3 inches divided by the speed of light in a gold plated bridge is what? 2.5 to the power -8 second?

Is that correct? Or, is it to the -10 power?

 

[Kolia]

Is that correct? Or, is it to the -10 power?

I couldn't find the exponent button...

~0.000000025 second ? Not much anyways!

 

[mtrycrafts]

I couldn't find the exponent button...

~0.000000025 second ? Not much anyways!

Not an exponent button issue
I think it may be a calc issue? light speed is 300,000,000m/sec so, 1m would be 3 nano sec? That is a bit over 3ft? 1 nano/ft which is 1x 10to-9? and 3" is 1/4 of a foot? ~2.5 x 10to-10?

Still very small

 

[mtrycrafts]

The manufacturers, in order not to eliminate their products as candidates for purchase by "believers" include those features.

Well, I would say some distorted truths and science. Skin effect is real and has a depth at 20kHz. But, after that it becomes distorted to fit their beliefs And other things...

 

[Kolia]

Negligible...

 

[mtrycrafts]

Negligible...

Yes, but is my math correct?