F/S Rockford Fosgate 10" Subwoofer

Apex Jr · 07:49 PM

I just picked up a good quantity of a 300W RMS - 4 Ohm - 10"
Freq response 24-250Hz for sealed enclosure subwoofers
These are just the speakers that fit in the R300-10 enclosures
These are new surplus.
http://www.onlinecarstereo.com/CarAu...e_R300-10.aspx

Price $29.95ea

Steve @ Apex Jr.
steve.apexjr@prodigy.net

Brian Steele · 24th September 2010, 10:52 PM

Quote:

Originally Posted by Apex Jr

I just picked up a good quantity of a 300W RMS - 4 Ohm - 10"
Freq response 24-250Hz for sealed enclosure subwoofers
These are just the speakers that fit in the R300-10 enclosures
These are new surplus.
Rockford Fosgate R300-10 Powered Subwoofers - Car Subwoofers at Onlinecarstereo.com

Price $29.95ea

Steve @ Apex Jr.
steve.apexjr@prodigy.net

TTIUWP :-)

planet10 · 25th September 2010, 01:26 AM

.

rhapsodee · 25th September 2010, 04:30 AM

Are the T/S parameters available?

GM · 25th September 2010, 04:52 AM

Hmm, according to the owner's manual, driver Fs = 36 Hz, Re = 0.36 ohms, so is this a misprint or a custom driver with little/no practical DIY usefulness?

GM

GM · 25th September 2010, 05:02 AM

Or is it this driver?

GM

Apex Jr · 25th September 2010, 07:24 PM

GM...
Very good question....

I'm going to have to find someone locally to check these out
The part is marked 0003594541-21 and nothing else.

Does anybody know someone who can check these besides
Speaker City.

Steve @ Apex Jr.

GM · 26th September 2010, 08:13 PM

Considering the business you're in, I'm surprised you don't have a woofer tester or similar. Anyway, I emailed them about this, though after I sent it, I noticed a tidbit in the manual about the drivers being 'application specific/optimized', so might want to measure 'Re' to see if it's really a fractional ohm one.

GM

Apex Jr · 27th September 2010, 03:48 PM

GM...
Guess your right, should step up to the plate and buy a woofer tester
since I get offered drivers all the time.
Is the Parts Express WTF 3 the best choice ?

Hope I didn't make a major mistake, bought 300 of the Rockford Fosgate
drivers(big investment)
Also if they answer please post there response.

Steve

Brian Steele · 27th September 2010, 03:59 PM

Quote:

Originally Posted by Apex Jr

Is the Parts Express WTF 3 the best choice ?

For your purposes, yes. Takes a few seconds to test a driver. I suggest just taking a few drivers out, running a low frequency signal through them for a few minutes that's high enough to get significant excursion, let them cool down a bit, then use the WT3 to measure their t/s parameters (Qts, Qes, Qms, Fs, Re).

You'll need a test box to measure Vas (I recommend the test volume method, not the added-mass method).

The WT3 will not be able to measure Xmax.

24th September 2010, 07:46 PM	#1
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	F/S Rockford Fosgate 10" Subwoofer I just picked up a good quantity of a 300W RMS - 4 Ohm - 10" Freq response 24-250Hz for sealed enclosure subwoofers These are just the speakers that fit in the R300-10 enclosures These are new surplus. http://www.onlinecarstereo.com/CarAu...e_R300-10.aspx Price $29.95ea Steve @ Apex Jr. steve.apexjr@prodigy.net Last edited by Apex Jr; 24th September 2010 at 07:49 PM.

25th September 2010, 04:52 AM	#5
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Hmm, according to the owner's manual, driver Fs = 36 Hz, Re = 0.36 ohms, so is this a misprint or a custom driver with little/no practical DIY usefulness? GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

25th September 2010, 05:02 AM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Or is it this driver? GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

26th September 2010, 08:13 PM	#8
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Considering the business you're in, I'm surprised you don't have a woofer tester or similar. Anyway, I emailed them about this, though after I sent it, I noticed a tidbit in the manual about the drivers being 'application specific/optimized', so might want to measure 'Re' to see if it's really a fractional ohm one. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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25th September 2010, 04:30 AM	#4
rhapsodee diyAudio Member Join Date: Jun 2005 Location: Singapore	Are the T/S parameters available?

25th September 2010, 07:24 PM	#7
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	GM... Very good question.... I'm going to have to find someone locally to check these out The part is marked 0003594541-21 and nothing else. Does anybody know someone who can check these besides Speaker City. Steve @ Apex Jr.

27th September 2010, 03:48 PM	#9
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	GM... Guess your right, should step up to the plate and buy a woofer tester since I get offered drivers all the time. Is the Parts Express WTF 3 the best choice ? Hope I didn't make a major mistake, bought 300 of the Rockford Fosgate drivers(big investment) Also if they answer please post there response. Steve

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