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View Full Version : Question about replacing blown sub


Ergyu
01-07-06, 05:13 AM
I blew my subwoofer quite some time ago and just decided to take it apart and attempt to replace the speaker. I don't really understand the ohm ratings though. The sub was rated 28 ohm, at 100W peak. The frequency range is 20hz-200hz and it's 8 inches.

I've been looking around on the net and found some places selling speakers, but everything is rated at 8 ohms or around there. Does this really matter to me? Does anyone have any suggestions on an inexpensive replacement speaker? It's just a kind of cheap pioneer sub, and I don't really have the money to completely replace the thing.

Thanks

Brian Shannon
01-07-06, 11:14 AM
I doubt it was rated for 28 ohms, 8 would be normal. In theory if you just blew the driver and can replace it with another in the same cabinet you should be fine. Car audio subs are sold in pieces as well as home audio from a place like www.partsexpress.com.

I believe the brand is Dayton.

AGuyNamedMike
01-07-06, 02:27 PM
Post the exact model of your Pioneer sub, one of us will be able to find the specs and recommend a direct replacement by business and part number, likely.

its_hey_ma
01-07-06, 02:53 PM
it may have been a dual 8 ohm, instead of a 28 ohm also

Ergyu
01-07-06, 10:44 PM
Yeah the 28 ohm figure sounds funny, but it's printed right on the back of the magnet and in the manual.

Model number S-FCRW720-S

its_hey_ma
01-08-06, 01:29 AM
I searched and came up with nothing. My suggestion: Go to partsexpress.com, find the contact info, email them and ask them what they would suggest to replace your sub (make sure to give them the model number and any info you can). They should be able to give you a proper replacement

AGuyNamedMike
01-09-06, 08:29 AM
The original Pioneer replacement part number 278604 was discontinued, but they have an approved new replacement part:

Part Number: 283012
Description: WOOFER 8" (SUBWOOFER)
Retail Price: $94.36
Your Price:
Status: IN-STOCK

No tech specs yet. Will keep looking.

its_hey_ma
01-09-06, 10:21 PM
The original Pioneer replacement part number 278604 was discontinued, but they have an approved new replacement part:

Part Number: 283012
Description: WOOFER 8" (SUBWOOFER)
Retail Price: $94.36
Your Price:
Status: IN-STOCK

No tech specs yet. Will keep looking.

Your searching skills>me

I looked for a while and kept coming up with nothing

AGuyNamedMike
01-10-06, 07:17 AM
http://parts.pioneerelectronics.com/part.asp?productNum=283012

It's just a matter of experience. I used to be a full service PC, printer, and appliance repair tech and finding parts was a daily task. Much of the web is considered "dark" and unsearchable by standard search engines. This includes parts sites, with database driven dynamic content. I just went to the Pioneer parts site and searched for replacement parts for the SFCRW720 (removed dashes and the trailing S, which was merely a color code for silver). Anyhow, at that price, your recommendation to Ergyu is the best one. He should contact PartsExpress and have them spec a replacement driver for his application.

Ergyu
01-11-06, 05:16 AM
Thanks a lot for the information guys. I thought to check Partsexpress first but hadn't done it yet. I understand everything in relation to it except the ohm ratings. Everything I ever see is something like 2, 4, 8 ohms. If I bought a speaker that had the range of frequency I desired, but had an ohm rating of 8, would that work? Thanks again.

AGuyNamedMike
01-11-06, 08:07 AM
Sounds like a plan. How many wires are connected to the speaker itself? We need to determine if it is dual voice coil or not.

its_hey_ma
01-11-06, 07:40 PM
The amp from the sub should be able to handle anything down to 4ohms at least. A lot of amps (not all) give more power the lower the ohm rating, ie: some amps produce 110 watts x 2 @ 8ohms and 150 watts x 2 @ 4ohms. I'd try and find out some info about the amp in order to make a decision on which driver to get.

Ergyu
01-11-06, 10:10 PM
Sounds like a plan. How many wires are connected to the speaker itself? We need to determine if it is dual voice coil or not.

Just 2 wires, a pos and neg.

its_hey_ma
01-11-06, 11:21 PM
One positive connected to just one spot on the speaker, same with negative, means a single voice coil configuration. Doesn't really matter though. What matters is what ohm the amp can handle. Find that out, and then match it up with speaker ohms. The more voice coils the speaker has, the more versatile it is when hooking it up, ie: A dual 4ohm speaker can either run 2ohm or 8 ohm, a dual 8 ohms can either run 16ohm or 4 ohm.

Ergyu
01-12-06, 02:11 AM
Oh, cool. Thanks again, I'll check here in a while and let you guys know soon!