home made speakers, please help

[meerkat]

wondering if anyone could help me here, i am making a pair of floorstanding speakers and i am wanting to have them bi -wired. these are the first speakers that i have ever made, i am stuck on how to wire them up. in each cabinet there will be 2 sony hi fi drivers and 2 tweeters. one pair of drivers came with a crossover built up on a board on the back of the terminal, and the other pair had a capacitor on the terminal instead the capacitors on the crossover have 12uf 50v f10%vnp and next to that one has 3.9uf50v and a smaller one that says3.3uf50v 10% np there is allso a big and small copper inductor, on the other pair the capacitor on the driver terminal has 1.5uf 100v 10& np written on it the tweeters have samxon 33uf 25v on them.
both pair ov sony drivers are 60hm and at least 90w use the same chassis and are very simular can i wire them up with the parts that ive got to be bi- wire -able if so what goes where?

[AllenB]

Bi-wiring is simply a matter of separating the tweeter crossover and connecting it via its own cable. Broadly speaking, it might just be a case of cutting the input connections on the crossover board where they split from the terminals to fork out to the two sets of drivers. By the way don't expect too much from this kind of upgrade.

[Boscoe]

Do you mean bi-wired as in actively crossed over? If so then you'll see a massive improvement. I don't think people really comprehend how much better active systems are.

[PeteMcK]

'actively crossed over' - that's bi-amped & will give an improvement;
bi-wiring is a waste of time

[viki_v2]

Hello,
Not to hack this thread, But a small question.
I have made 3 way Speakers-Woofer in Tl Enclosure.
I had a 3 way network so attached and palyed- Lows are very thin- But if i get close to speaker i can hear the Lows, What could be the problem -can it be BSC- If so how to implement BSC before crossover or After.

[picowallspeaker]

..small question !
It's a matter of finding balance , which is the most important thing for hi-fi reproduction .
There are too many variables , which include each speakers' sensitivity and the band they are supposed to work in . The crossover network has the task to level each speaker ...probably some call it BSC ,but it's the basic of how it works .

[meerkat]

allen b & booscoe, what im sayin is yes the speakers will be bi-wire able with seperate paths inside the cabinet but im stuck as to which capacitors &resistors to use where, like i say i have sum on the terminals and the other pair had theres on a crossover board the 2 pairs of drivers are the same just from different boxes thats why one pair came with capacitors on the terminals ive wrote down the spcs above.
i cn get a soldering iron to do it but dont know which capacitrs to use or resistor.
the inductors are obvious, small for treb big for bass.

[picowallspeaker]

A little boring reading which is useful to refresh some notions
Passive Crossover Networks

[system7]

meerkat, you're not going to make ANY progress with this until you analyse the crossovers better. Here's how mine looks these days:



We'll take a chance on the coil values, usually being large on the bass and small on the tweeter as you say. Chances are a prebuilt crossover is going to have a common earth for the tweeter and woofer that will force a rebuild if you really must biwire.

Doubling woofers can be done though it might take the load down to 3 ohms, but very questionable if two tweeters in a loudspeaker makes much sense, but lets look at it in more detail. It all sounds rather Heath Robinson to me!

[Inductor]

Originally Posted by viki_v2

Hello,
Not to hack this thread, But a small question.
I have made 3 way Speakers-Woofer in Tl Enclosure.
I had a 3 way network so attached and palyed- Lows are very thin- But if i get close to speaker i can hear the Lows, What could be the problem -can it be BSC- If so how to implement BSC before crossover or After.

Check what pico said. Now, I would sart a new thread, and post the crossover layout plus the reference for your drivers. Some midbass from Wavecor, as an example, are not good woofers but possible good mids. The other possibility is the implemented crossover design as was said.
I would leave the TL speakers references (if that) for others, though (no experience).