Question about JBL S120PII Subwoofer

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

When I have my subwoofer hooked up and have it cranked all the way on the sub output, it barely pounds or does anything except for it sounds like its being somewhat medium powered. Even with HIGH bass music it dosent sound correct. Almost like it Distorts sometimes or even dosent even pound. I used to own the 10in version of this sub but used warranty when that one blew. Someone please tell me why my sub isnt acting like it should.

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Get a nice monster subwoofer cable and a Subwoofer PowerCenterâ„¢ SW 200 with Clean Powerâ„¢ Stage 1 get it from like amazon and you'll definately see a difference and also put the sub in like a corner

Posted on Jan 23, 2010

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How to hook up a Kenwood subwoofer to a pioneer receiver


It depends on the speaker and receiver inputs/outputs. If The speakers have bare wires, and the receiver has spring clamps, you are in luck! Check out what I mean by spring clamps in the image linked below. If you can give the model number of the receiver and describe the wires coming from the subwoofer, I can help a lot more.

www.audioholics.com/diy-audio/how-to-use-a-speaker-selector-for-multi-room-audio/NilesSpringLoadedSpeakerSelector.jpg/image_preview

Jun 11, 2015 | Pioneer Audio Players & Recorders

1 Answer

How do u hook up the infinity entra sub it has speaker level(input and output) that look like these red and black spots r for spearker wires and then line level input so I connect my music to the rca plugs...


Maybe if you described the setup with exact model numbers for everything involved we might be able to answer with specifics.

You could poke around her for the Entra Manual for YOUR model.

http://manuals.harman.com/INF/Hom/Owner's%20Manual/

What they do NOT explicitly tell you is that the amp in the sub is not for your other speakers running off it's Speaker Level outputs. They're just there as a pass-through if you use Speaker Level from your own amp.

Line Level (RCA) IN to the sub will NOT pass anything out those Speaker level outputs.

Jan 13, 2011 | Infinity Entra Sub Subwoofer

1 Answer

I have power but no sound. I have hooked up another sub and it works fine.


Lack of sound as you have confirmed, lies in the sub. the sub is faulty. check the sound I.C in the Sub and the output side If and only if you are a quarlified technician. Else, a technician needs to help change the output I.C and check the transistors likewise.

Oct 13, 2010 | Mirage Omni S12 Subwoofer

2 Answers

Old receiver, new subwoofer- how to connect?


NOOOOOOOOOOOOOOOOOOOOOOO! Never connect speaker outputs to anything that looks different, like RCA connections. Can you say crispy critter?

Your receiver sounds like it won't send specific Subwoofer of Low Frequency Effects information to the Sub so we're cheating by adding a sub. If you named the model of each we may have a better shot at naming the output you need to use.

I'm curious. How did you have the old passive sub working?

Basically what you may have to do is feed (probable) full range audio to the Sub using an RCA splitter to combine the L and R outputs found, oh, at any Tape Output that you're not using. The Sub will only reproduce what it can. The presence of higher frequencies won't bother it. If it has its own volume control you'll be able to balance its volume with the rest of your speakers.

Mar 18, 2010 | Audio Players & Recorders

1 Answer

2 MTX Thunder Problem.. Bridging?


Is there a option on the chanels that say ''Bridged''? If so, you can hook the subs up in parellel or series to get different ohm loads. Usually the lower ohms, the more power amp puts out. Those subs can handle 225 watts RMS whitch means the power it can handle constantly. If the amp gives more than 225 watts RMs, you could be at risk of blowing the sub. If you could give me the model # of the amp, I can be of more help.

Feb 11, 2010 | MTX Thunder 4500 T4510-04 Car Subwoofer

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Subwoofers pop then immediately produce no sound


Sounds like the two subs wired together might be too much of a load on the amp and it is shutting off. Try wiring the two subs in series. That will reduce the load on the amp but will conversely put out less power. Less is better than none though. In any case check your amp to see what the lowest ohm rating it can see, that ohm rating is where you want your subs and if faced with a choice of either going under (lower numerically) or over (higher numerically) GO OVER!-it is much safer.
Here's an article I wrote that can help explain how to wire the subs to the amp.

OHM LOADS, SUB WIRING, OHM RELATED POWER OUTPUT

SERIES SUBWOOFER WIRING
Wire the positive pole from one voice coil (using wire that is as thick or thicker than your wire from amp to sub) to the negative pole of the other voice coil (on the same sub). This will leave you with a positive pole from one voice coil and a negative pole from the other giving you the two leads that will be hooked up to the amplifier or other subs. When wiring in series, the ohms will go up numerically, and the load on the amp will go down. Almost all amplifiers power output will follow this rule, except some amps such as JL Audio's “Ohm matching” D Class amps.

PARALLEL SUBWOOFER WIRING
Wire the positive pole from one voice coil (using wire that is as thick or thicker than your wire from amp to sub) to the positive pole of the other voice coil (on the same sub). Then wire the negative to the negative in the same way. You can then wire to the amp or other subs. When wiring in parallel the ohms will go down numerically, and the load on the amp will go up. Almost all amplifiers power output will follow this rule, except some amps such as JL Audio's “Ohm matching” D Class amps.

MULTIPLE SUBS USING SERIES AND PARALLEL WIRING
In order to match your amplifiers ohm rating you can use parallel and series wiring together, just keep things even for power distribution and to avoid phase issues.
Example: I have two “Type X 12” subs” that have dual 2ohm voice coils and have to match my “Amplifier X” ohm rating of 2ohms mono. In this case, I would wire each subwoofer in series (giving me a 4ohm load), and then wire the two subs in parallel to get my 2ohm mono load. When wiring multiple subs just, treat each sub as a voice coil and wire accordingly.

POWER OUTPUT AND OHM LOADS
For example if “Amplifier X” can make [email protected], it would make [email protected] and [email protected] However with every drop in ohms the amplifier is put under more pressure. It starts to create a lot of heat, distortion figures begin to climb, damping rates drop, and some amps even throw power spikes when clipping. SO BE SURE TO CHECK YOUR AMPS RATING AND DO NOT EXCEED IT!

-Dynami

Apr 04, 2009 | Alpine Car Audio & Video

1 Answer

Constant sound from subs


I Had the Same Problem I just unplugged my amplifier changed the fuse, also i had a fuse in the battery cable and changed that, unconnected the RCA wires and plugged them back in and then put new fuses in and plugged everything back into the amplifier and it worked again. If that doesnt work get back to me i will try to help you.

Jan 09, 2009 | MTX RT2200 Car Audio Amplifier

2 Answers

Very low ouput from subwoofer preout


The problem was that some subwoofers (inluding my velodyne model) cannot process the LFE signals through the line level inputs on its amps, so the other way to run your subwoofer is to run the front left and right speaker outputs from your receiver to the speaker-level inputs on your sub, and then plug your front and left speakers into the soeaker level outputs on the sub. you have to set the onkyo receiver to "Subwoofer: No". that way the LFE signals are sent through the front speaker channels and you will get the same BASS output as if using the line-level input. O So yes it does require a bit more speaker cable, but it works fine now.

Mar 18, 2008 | Onkyo TX-SR304 Receiver

1 Answer

Klipsch subwoofer


its all about impedance matching...did you check to see that the new yamahas would drive from the system, before installing them? sounds like you will need to possibly add a matching transformer or other device on this one.

Mar 09, 2008 | Gem Sound SUB-650M Speaker

1 Answer

Subwoofer Output Not Working...


The first thing to try is disconnecting ONE of the two subs. See if you get more bass with a single sub than with both. If you do, re-connect the second subwoofer, but reverse the (+) and (-) wires.

Jun 19, 2007 | Panasonic MXE CQ-C7401U CD Player

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