I have never had the 2235's in my 4344 clones hit their mass rings. The only time I have had that happen is in a B380 clone listening to "Cloverfield" and the cannons in "Master and Comander" at high SPL levels. Never had it happen on any music source only HT as a sub.
Rob
"I could be arguing in my spare time"
It can not hurt! This circuit should be just about perfect for you. It is tuned for 17 Hz, but you can change it easily enough if you need to.
The link looks good as far as what little I know. This is where I wish I knew or was more technical to be able to put that filter together.As it is I have to pay someone with the knowledge to put it together because my electronic knowledge is basically nil.
I do have common sense though and was able to solder all the cables and hook everything up.
Should not be a problem if you order the PCB. Just buy the components, push them into the circuit board, solder, and clean with acetone of alcohol. You need a power supply, but there are off-the-shelf power supplies you could buy.
Stuff it in a metal box with connectors and you should be good to go. If you have a PC test program like HolmImpulse you can actually test the circuit and see the results graphically.
By the by, they were reconed 2225H, work done at Slice speakers in KC!
Agreed. I drive the wholly crap out of mine and never, never have I hit the pole piece. Maybe the mass ring came loose? I've had them playing very loud with various amps, 25 watt MC-225, JBL 6230, a 150 watt Mitsubishi Amp, and my DIY 6550/KT-88 amp. Never a problem, tuning varies from 30 hz, ( 2 vents closed on 4507) and 34 Hz (1 vent closed on 4507), never hit anything and no one could barely hear anyone saying anything!
russellc
I had this issue with my B-380. When I first worked it into my system I was using a Hafler DH-500 that had been internally bridged. I remember a conversation with someone at JBL tech support recommending a Urei subsonic filter. I never got one. I just figured I would only play it so loud. However a couple of years later the power switch on the Hafler crapped out and rather than jury rig it [pre- internet couldn't find parts and my local tech couldn't fix it] I purchased a Parasound HCA-1500A to replace it. Bridged mono still about 600 watts @ 8ohms, but holy crap that B-380 could play twice as loud [stupid loud] and still not make the pop. I don't pretend to understand electronics, but clearly it was the amp not keeping up with the speaker [as they warned in the owners manual]. Only change I made to the system was the sub amp. When I got a second B-380, my local JBL tech hooked me up with a Crest 7000 series pro amp for the subs. About 500 watts per channel and neither ever made a pop. The attachment is from the B-380 manual.
You can rotate the view of this PDF. See the section on "associated equipment"
Last edited by rusty jefferson; 04-11-2010 at 04:46 PM. Reason: misspell
Most of these problems (woofer "sparking") is lack of power. With 700W to the woofer; no problem.
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