Blown 8 inch Paper Cone Woofers

[alectrevelya]

Hi there, I am new to the DIY stuff, but I'd like to save money this time around. I have a pair of Acoustic Profiles PSL 8.4 speakers, which I have just blown the woofers out of with, you guessed it, Telarc's 1978 recording of Tchaikovsky's 1812 overture.

Turns out these had very cheap 8 inch Peerless India paper cone woofers in them, model W8-12T-4P. I am thinking of replacing these with Dayton Audio full range woofers. My question is: I cannot find any literature online for the Acoustic Profiles speakers. I have no idea what to do with the crossover. Is there an easy way to bypass the crossover? The old Peerless India woofers were not full range as I had originally thought, but have a frequency response of 40Hz - 3500Hz. These Dayton woofers have a frequency response of 40Hz - 25,000Hz.

Would I need to delete the crossover to make the Daytons work properly?

 

[elnaldo]

I'd read the specs, and choose something closer to the original. Read the TS parameters, Qts, Qms, Qes, resonance freq. Vas, Sensitivity, impedance, and choose the closer match. Ask the seller for a proper replacement or try to find the original woofer on the web. Perhaps Peerless can offer you a replacement, I'd e-mail Peerless directly (I think they are "tymphany" speakers now) http://www.tymphany.com/peerless/

In case those are not the original woofers, try to find data about the original part, perhaps you find some used original woofers for sale.

Fitting a completely different woofer, trying to modify or to bypass a crossover without re engineering the whole speaker, and have a successful result is a complete lottery, 99% chances of a failed try.

 

[alectrevelya]

I'd read the specs, and choose something closer to the original. Read the TS parameters, Qts, Qms, Qes, resonance freq. Vas, Sensitivity, impedance, and choose the closer match. Ask the seller for a proper replacement or try to find the original woofer on the web. Perhaps Peerless can offer you a replacement, I'd e-mail Peerless directly (I think they are "tymphany" speakers now) http://www.tymphany.com/peerless/

In case those are not the original woofers, try to find data about the original part, perhaps you find some used original woofers for sale.

Fitting a completely different woofer, trying to modify or to bypass a crossover without re engineering the whole speaker, and have a successful result is a complete lottery, 99% chances of a failed try.

Thank you. This is my first attempt at fixing speakers myself.

 

[redk9258]

How about some pictures of the blown driver?

 

[alectrevelya]

How about some pictures of the blown driver?

I already put them in the garbage, where they should have gone in the first place lol. The replacements were available for about $15.00 each off Parts Express. I'm sure Elnaldo is right about experimenting with speakers without doing research resulting in a 99% failure rate, but I don't need these to be reference quality by any means. I just want them to sound decent.

 

[elnaldo]

I"d buy an 8 ohm paper cone woofer, perhaps a dayton woofer, reading a bit the specs and checking the volume of your cabinets against the manufacturer suggested box for the woofer.

Check a bit the datasheets to find a woofer suted for your existing cabinets, ported or sealed.

I'd invest the time studying and choosing an appropriate woofer instead of buying any random woofer and invedting time modifying the speakers.

If you already have the replacement woofers, I"d build a new speaker from scratch.