I just purchased 2 old Peavey SP-2 and SP-3 speakers. How do I wire from the crossover to the speakers so the horns and 15's are wired in correct.

There is possibly a bad solder connection or component on the crossover. I cant remember if that crossover uses a 12volt light bulb or not, for DC current protection, if it does make sure the bulb is good.

Horn is red +, black -, mid is white +, blue-, lows are yellow+, blue-. If you look at the crossover board, you'll see the treminals are labeled what goes to where.

In Peavey cabinets, the woofer is always Yellow + and Blue - and the horn is always Red + and Black -. On the mid the remaining two wires would be the lighter color + and the darker color -

In Peavey cabinets, the lower woofer is always Yellow + and Blue - and the horn is always Red + and Black -. On the middle 15" the remaining two wires would be White + and Blue -

there are 2 of them in the new ones....but ya probably the blew diaphrams...unless they are old one...then it could still be in the crossover..need to know the exact SP2 model you have, as they have changed the speaker again and again over the years.

High side speaker input jack defective, as they are switch also and if you plug the wire from the amp in full range and no hf sound but connecting directly to the bi-amp hi does, then your female 1/4 plug at crossover is defective for sure.

i) I believe you can access the fuse by removing the Input Jack Panel.

ii) If fuse is OK, then unscrew the horn unit, take off one speaker wire & measure resistance. If it is open circuit then you can order a replacement horn diaphragm (if you feel confident to fit it to the horn).

The lamp is an "1156" lamp... replace with that part number. Here :

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=524517&k=lamp%201156

Or you can find it at auto parts store.

LIKELY the polyfuse device is ALSO gone... Probably similar to this one (1.1 amp, trip 2.2 amp):

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=F2010-ND

or this one (1.85 amp, trip 3.7 amp):

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=F2013-ND

You have probably bypassed the crossover that directs different frequencies to the appropriate speaker/horn.

The speakers are designed to be used the way they were delivered. It is easy to damage them when connected wrong.

I would suggest you restore the circuit to the way it was designed to avoid damage to speakers or the amp.

Horn and speaker combo cabinets have an electronic component called a "crossover". The horn and speaker both work off different electrical signal frequencies. If you can take off the back, or get inside by pulling the speaker, check for a small circuit board mounted inside the box or on the speaker or horn. Check for a broken wire or loose connection of the crimp connectors.

A common problem with speakers, often the cone, or paper part of the speaker will come un-glued or separated from the magnet "voice coil". This happens when played too loud, when it's commected to the wrong impedance, or if the signal was shorted and "overdriven" (usually sounds like an awful buzz that's really loud).

Always make sure your output impedance matches the impedance of the speaker. Most auto stereos are 4 Ohms. Older home stereos are typically 8 Ohms. Musical PA gear varies between 4, 8, and 16 Ohms. Peavey gear is typicall 4 Ohms, but some older models are different. The Ohm rating is the amount of the resistance in the circuit. If your speaker is 4 Ohms and you plug it into an 8 Ohm circuit, you can destroy the speaker and sometimes the crossover circuit board.

Good Luck.

Jim
[email protected]
Phoenix, Az