bi-wired speakers

[terteliu]

hello, I,ve recently saw that my amplifier supports a bi-wired connection type. The amplifier name is Technics SU-VX720. The home made speakers are 3 way, bass, mid, treble, 8 ohm impedance.

If I bi-wire them, the overall impedance should lower to 4 ohm, is it? In the amplifier manual, they say that sound can be reproduced with much greater nuance and detail in a bi-wired connection.

Since I never done this, my plan for bi-wireing is to modify the crossover by makeing a separate signal entry for low frequency and cut off any connection in the crossover between the low and the mid+hi frequences.

Would it be a good ideea to do it?

[Cal Weldon]

I can't get access to an owners manual without paying for it or giving out my email address.

1. Biwiring usually refers to a 2 way but can be managed in a 3 way.
2. The impedance doesn't change to 4 ohms.
3. Can you scan and post the back panels of the amp and can you include the text part of the speaker wiring also?

[AndrewT]

You state that your amplifier has twin speaker terminals to allow bi-wiring.
Do your speakers have twinned or tripled terminals to allow bi- or tri-wiring?
These are very easy to experiment with.

If your speakers are not multi-terminated, there may be a reason, or several. One could be that the crossover is a series type, these cannot be converted to bi-wired.

[simon7000]

Cal.

If you keep being helpful and giving good advice you should reconsider if you belong here!

In large systems, the air absorbs 20db or more of the high frequencies. So although it is common to tri-amp the loudspeakers, it is actually silly. As the tweeters generally cannot handle more than 600 watts, even though music has less energy in the highs (-3db / octave) crossing around 1.5 k means the midrange only needs about 60 watts or less to keep up. Allowing for a db or two of crossover loss means even a small pro amp can drive both! (The smallest amps I see these days are 600 watts per channel, the 1200 watt version is less efficient and costs about the same as the 2000 watter!)

[Cal Weldon]

Originally Posted by terteliu

they say that sound can be reproduced with much greater nuance and detail in a bi-wired connection.

This is debatable but it seems as touchy as religion so I recommend you try it for yourself. No one else can judge the validity of the statement.

[terteliu]

Ok, I've done the crossover design on paint program, and also a foto to the back of the amplifier.

The crossover has very good components, but it's simple, made by me, I can reconfigure it at any time. Also the speaker boxes are made by me, so I can just as easy to change the back terminal from +/- to 2 +/-.

[IMG]C:\Users\Terte\Desktop\New folder\IMG_0989.jpg[/IMG]
[IMG]D:\kit\filtru.jpg[/IMG]

I don't know how to insert the images yet, and also the manual of the amplifyer. The manual can be found and downloaded from internet, I've searched google, technics vx720 manual download, and it could be downloaded from 1-2 links, not all of them give it for free, but some, do.

[terteliu]

Originally Posted by Cal Weldon

This is debatable but it seems as touchy as religion so I recommend you try it for yourself. No one else can judge the validity of the statement.

Yes I've searched google, and many people say this is debatable. I was wondering if how I said I would do it, is a good procedure.

[terteliu]

[terteliu]

Simon7000, this is for my home, the amplifier has at most 70w per channel, 8 Ohm. I do not speak of very large sistems 600w or 1000w.

[Loren42]

Originally Posted by terteliu

hello, I,ve recently saw that my amplifier supports a bi-wired connection type. The amplifier name is Technics SU-VX720. The home made speakers are 3 way, bass, mid, treble, 8 ohm impedance.

If I bi-wire them, the overall impedance should lower to 4 ohm, is it? In the amplifier manual, they say that sound can be reproduced with much greater nuance and detail in a bi-wired connection.

Since I never done this, my plan for bi-wireing is to modify the crossover by makeing a separate signal entry for low frequency and cut off any connection in the crossover between the low and the mid+hi frequences.

Would it be a good ideea to do it?

Don't bother. Bi-Wiring is simply a myth or scam invented by marketing people to make people believe they are buying a superior high quality product.

Just use heavy gauge speaker wire and be done with it.

The theory of bi-wiring is that it reduces impedances along the speaker cable, which would be true if you used 26 AWG wire. However, using simple 12 AWG zip cord from Ace Hardware will be sonically indistinguishable from any other wire you can find on the planet (assuming the total length is not outrageously long).