Question about JBL Northridge E 250P Subwoofer

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Even Distribution Powered sub link to another cabinet, the linked cabinet is fine, powered cabinet has major drop in output. Any thoughts?

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I have same speakers try these setting and tell me what you think put phase at 180 and put switch on lfe mode not normal for some reason my sub plays louder on these setting verse phase on 0 and lfe switch on normal i have power on subwoofer a little more than half also set croosover to 80hz you will never touch it again

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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I brourt a jamo sub 200 and five a102speakers but


The Jamo speakers need an AV Receiver to drive them properly. The TV doesn't have the correct outputs nor does it have the power required.

The Jamo kit consists of a powered subwoofer ans 5 small surround speakers. Each surround speaker needs to be powered by the speaker output from an an AV Receiver. The subwoofer should also be connected to the receiver, but the connection is a phono/RCA lead from the receiver's "Sub Out" socket.

Your TV connects to the AV receiver via the Optical out.

Aug 31, 2014 | Audio Players & Recorders

1 Answer

Problems with JBL PSW D110


The speaker level input option is designed for receivers that don't have digital output for the sub, used this way when you set to digital the speaker outputs only get the higher range outputs so won't reproduce much bass. To get the sub to work in digital mode you need to use the digital output (single RCA) from the amp to the sub

Mar 06, 2012 | Audio Players & Recorders

1 Answer

My powered sub keeps blowing fuses every time i plug it in..Ive looked it over and nothing seems burnt or broken...It is a MTX sw1212 the sub is fine it's just the amp


check out that the output is not shorted on the terminal strip or near the connectioon to the sub woofer speaker driver.......if not then there is some other problem and you need to take it to a trained technician .......as you yourself can't rectify the problem.....

Jan 21, 2011 | MTX SW1212 Subwoofer

4 Answers

I have a Kef PSW 2500 that emits a loud buzz when on. I pulled the amp, but I'm not sure if its the speaker or amp. What should I be looking for the speaker outputs from the AMP? How can I tell if its a...


Have just repaired a similar problem with a KEF 2500 - relay was chattering at 50 Hz rate, buzz in speaker output.

Problem was caused by overheated / dried out Electrolytic filter cap (C52 - 47uF 63V) on the relay coil supply feed.
The overheating is caused by adjacent power supply dropping resistors which run very hot due poor design of power supply.

A service manual for a similar model is available at following link, refer to power supply section:-
http://www.eserviceinfo.com/downloadsm/35375/kef_psw2000.html

To replace,
1) remove chassis from speaker cabinet (8 screws), disconnect red/black speaker wires from main PCB spade connectors.
2) Remove 4 screws attaching main pcb heatsink assembly from face panel - lift assembly from faceplate (a bit messy , much heartsink compound between mounting faces)
3) unplug the AC 3 pin connections adjacent to the large capacitors and the 3pin connector on end of pcb (near C52), then roll assembly over the top of the audio sub-board to access underside of pcb.
4) solder connections to C52 is accessible at edge of board without further dis-assembly.
Take extreme care replacing C52, as the circuit board is of poor quality, (usual domestic electronics quality) being single sided copper without plated through holes.
The board is already heat damaged by heat buildup from power supply resistors, so the track will most likely lift and crack when disturbed- to counter this problem link the +ve capacitor pigtail to an adjacent solder pad on the same track.
Assembly is reverse of above, take care to preserve/ensure minimum disturbance of heatsink compound.

Nov 29, 2009 | KEF Audio PSW 2500 Subwoofer

2 Answers

Connect stereo amplifier to powered sub


You can y out from the main out to the sub.This output is post volume control. set level on sub to desired balance of lows feq to highs

Nov 20, 2009 | Yamaha YST-SW015 Subwoofer

1 Answer

RCA 10'' Home subwoofer powers up but no sound


  • Although most of my background is in car audio & acoustics, I did have a thought or two about some tests you can do.

DO THIS AT YOUR OWN RISK OF ELECTROCUTION - Have you tried checking the speaker terminals with a voltmeter while the unit is plugged in? I,ve seen solid state amps (both car & home amps do this) kind of lock up and send constant line voltage to the sub. In some cases the sub snaps instantly, high power subs may not. I've used power from a 110v wall outlet to show off some high SPL systems I've built (very painful 60hz earthquakes). So be careful at the sub terminal it may have some voltage at it.-(If it does you probably know the rest of my answer.)- If so the sub will most likely be wasted and fused voice coils are also common when this happens.
If everything checks out okay there (make sure to check if the subs resistance is at spec while you're there) use the voltmeter and start poking around the audio side of things both on the powered sub and RCA's. You may even find a easy problem on RCA cables. Also can/did you plug the RCA's into a known source, to check their output. Most home audio is 1.5v max but some can go as high as 8v max or so. Also don't be afraid to check the simplest of items like source buttons, specifically the tape monitor buttons. My equipment has these such tape functions with little or no indication as to weather or not they are active, and not being plugged into anything you get no sound. I hope I gave some idea's you may not have tried, your fellow Audiophile-
-Dynami

Mar 31, 2009 | RCA Audio Players & Recorders

1 Answer

Crackling coming from Velodyne DD-10 subwoofer


One of 2 things is going on.

First, the servo mounted in the driver may be going bad or is picking up some noise.

Second, Something in the amp section is going bad, hard to pinpoint the exact problem.

you say that it plays, so I tend to think it is the driver mounted servo unit.

If it is within the warranty time, take the unit back to the retailer you purchased it from, if not contact Velodyne for repair.

Mar 18, 2009 | Velodyne HGS-10 Subwoofer

1 Answer

Subwoofer not powering enough (Sounds like under powered 8inch)


get a nice monster subwoofer cable and a Subwoofer PowerCenter™ SW 200 with Clean Power™ Stage 1 get it from like amazon and you'll definately see a difference and also put the sub in like a corner

Jun 08, 2008 | JBL S120PII Subwoofer

2 Answers

Subwoofer connection


if this is ao powered sub, that plugs into the wall, there should be no problems, if it is powered solely by the reciever it may work fine but be sure you dont exceed amperage on the subwoofer.

Jan 28, 2008 | Bose 151SE Main / Stereo Speaker

2 Answers

Major buzz/Humming sound coming from my subwoofer


Well there are only a few reasons i can think of that just might be the reason behind said buzzing.

1. It may be connected to another power source ( amplified or powered supply ) or incorrectly connected. It may also be too close to said power supply.Try letting the dog (sub) out on his leash a little Drag out the manual that came with the sub, and check the correct procedure for your type of setup.
**People do read manuals still don't they ?**

2.The only other problem i have heard of is port noise in low registers. Keep the the port area clean, as it may suck up dirt, or even worse, small children!

3. However, if you're considering placing this subwoofer in a cabinet, I'd recommend allowing ample breathing room for the heat sink. This can also be done by drilling smaller holes in the cabinet ( 8-12 mm holes - with the owners permission of course) but please do remember to keep the port area clean.

4. The product ie: Velodyne DPS-12 Subwoofer, came with a bad power supply, presuming it is new, check your warranty.
(not very likely - see also scenarios 1, 2 or 3.)

Velodyne has been making subs forever and do it well.


Jan 17, 2008 | Velodyne DPS-12 Subwoofer

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