Question about JBL PSW1000 Speaker

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Double coil sub woofer

I hav double ciol sub woofer & i made a box accoding to its measurements.i connected two coil serially.its 4ohom 500 max watt per coil.since searially connected it soud be 8ohom & 1000 max watt for the bffle.is it ok connecting serially?

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Posted on Jan 02, 2017

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SOURCE: I get feedback sound from the sub woofer when it's

I pulled this up for you to review , its a quickie on the subwoofer and why how where they function, I suggest you contact JBL Customer service and ask for Tech Support on this if all else failed, they may have a quick fix kit to install (Servo) to suppress the feed back. Background on Subwoofers Subwoofers are designed to produce only the very low end of the music spectrum. Most subs perform between 20 and 80 Hz only. Though the exact range varies depending on preference. In order to filter the frequencies above 80 Hz, you need a high-order low-pass filter. We chose to build a 24 dB/octave filter at 90 Hz by cascading two 2-pole Sallen-Key filters together. This filter can be bypassed if an external crossover is to be used. There are also many types of subwoofer enclosures ranging from 2nd order IB, to 6th order bandpass that we could choose from. Each design is more complicated than the first and much more difficult to achieve predicted results. In our case we chose to go with a 2nd order sealed (or acoustic suspension) because of simplicity and accuracy in achieving predicted results. Also sealed enclosures have a more linear phase response with relationship to frequency. They have a naturally more shallow roll-off rate of 12 dB/octave. So it can be argued that in a sense they yield the most low frequency response. Also a sealed enclosure has more control over the motion of the cone. Since we are actively monitoring the motion of the cone, we wanted to make sure that it was tightly under control to begin with. The driver has less of a tendency to bottom out in sealed enclosures. Overall it was a much better design approach to go with that any of the others.
A subwoofer must also have a really good flat response curve. Below you will see the response curve of our subwoofer as it was after we built the enclosure and mounted the subwoofer. An air tight seal is essential. This can be checked by pressing in the cone and then watching how fast the cone moves back up to its rest position. Our cone sure enough took about 3 seconds to return so we were definite we had a good sealed box. [It was pointed out to me recently that this is actually an indication of a small leak in the enclosure. With a truly air-tight enclosure pushing in the cone will actually compress the air inside that when released will result in the cone springing back rapidly, not slowly, to its rest position.]

Posted on Aug 16, 2010

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I have 2 audiobahn 12 inch 500 watt awc12t dvc woofers with 2 pos and 2 neg hook ups on each side of the speakers like this (- -) (+ +) and the same on opp side i need to know how to wire them to each...


OK. Sometimes manufacturers put two flat prongs to each of the positives and negatives of the voice coils. This allows for daisy chaining multiple subs to be easier. Here is how you want to wire your subs in the box.

From the positive post of the box to the positive posts of both voice coils (just choose one prong on each of them, you do not have to connect all 4 of them). So you will have 2 wires going from one post on the box to 2 posts on the sub. Got it. Not go from the negative post on the box, to both negative posts on the subs. Repeat this with the other sub. Now you can hook each channel of the amp to the box regularly pos of amp to pos of box and neg of amp to neg of box.

This set up is called parallel and will drop the ohms resistance of two 4 ohm voice coils to a 2 ohm load. You will get 2 ohms for each sub, thus connecting one sub to each channel. This will allow you to get the max power out of the amp or 150w RMS per your post. Hope this helps.

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This amp is rated at 500 watts into a 4 ohm load bridged mono or 250 watts x 2 into 2 ohm load stereo. Do not go below that impedance in either case. The amp was meant to dissipate a certain amount of power, driving it to hard will lead to damage. Your speakers look like they are dual voice coils @ 4 ohms each. To get the max power while still saving your subs would be to parallel the voice coils on each woofer then run them in stereo with your amp. Stereo 2 ohm is 250 watts per speaker.

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Hello smoovek2008,

The JL Audio 500/1 outputs 500 watts RMS into a load from 1.5 to 4 ohms. Whether your subs have 2 ohm or 4 ohm voice coils, they should be wired in series and the subs paralleled to the amp. The final load to the amp will be either 2 ohms or 4 ohms, both of which the amp can handle. If you parallel the voice coils and then parallel the subs, the final impedance will be either 0.5 ohm or 1 ohm, both too low for the amp.

You can wire each sub to a separate set of terminals or both to the same set. The terminals are connected internally. It doesn't matter which of the +'s or -'s you use.

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Hello king3132,

Three 4 ohm subs can be wired parallel for a 1.34 ohm final load or series for a 12 ohm load. If you have the channels of the amp bridged, I hope that the subs are connected in series because the Sony XM-2200GTX is NOT rated for or stable at 1.34 ohms. It's only stable down to 4 ohms.

You definitely will not get the maximum potential of the subs from that amp. They can handle 400 watts RMS each (total 1,200 watts) and the amp is only capable of 500 watts RMS into 4 ohms (less at higher impedance), so each sub could only be getting a maximum of 166.6 watts RMS.

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