Question about JVC TH-C30 System

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How do I bypass auto power on/off on the JVC SP-PWA6000

The auto-on system only turns on the sub's amplifier when the line signal exceeds a certain level. The sub doesn't even turn on until the sound is playing at a loud enough level to exceed the threshold.
How do I bypass auto power on/off on the JVC SP-PWA6000 subwoofer?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 103 Answers

SOURCE: auto muting

Sounds like something inside went south. You can try disconncting the speakers and see if it still happens. If so, then the system is in need of repair. If not, then a speaker may be shot. Try connecting one speaker at a time to see which one may be causing the auto-mute problem.

Hope this helps, and please rate my advice, good OR bad.

Good luck!

Posted on Feb 04, 2008

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SOURCE: Subwoofer JVC TH-M606

The subwoofer suddenly stopped working. Other speakers fine. Seems might be a bad connection - how do I remove the side of the subwoofer on which the speaker's mounted? I remove the four hex bolts but it's still on tight and I don't want to force it.

Posted on Jul 31, 2008

SOURCE: JVC sp-pwm606

Hello, it,s very possible that it,s circuit protector built in to the sub (if it,s a self powered sub) gets to the point of overload and shuts off as a protection so that the speaker won,t get damaged and also so the internal amp tha,t pushing the speaker sound is also protected since theese amps all have heat buildup, their are two types of subwoofers ,They are the powered ones and the ones that are powered bt the surround amp ,The ones powered by the stereo surround amp/tuner tend to throw out less power to the sub and the ones that have internal power are mostly higher powered , Another thing you might want to check is your polarity to the speakers and also the omage , Most home theater system speakers are 8 ohm,s but their are speakers and amps that can be changed to 6 ohm,s ..so you might want to check the speaker rating also . Well hopefully you can use theese different methods to at least troubleshoot and discount the thing,s that are not the issues , Good luck and hope theese sugestions might help you , Sincerely Glenn

Posted on Mar 04, 2009

  • 2 Answers

SOURCE: SP-PWM505 subwoofer does not stay on

Well i had exactly the same problem, my sub turned off right away when i turned the whole thing on. Well i opened the subwoofer and was trying to find out something unusual, i took out, i believe, internal amp, well, whatever that thing is, under the lid. Which one is screwed with 6 copper screws, so you unscrew those screws, lift that lid and that whole board comes out. On that board i find something like burn around one of the parts.

http://www.flickr.com/photos/28004328@N04/3333561417/in/photostream/

you can see it in the pick, the part q2902, then i contacted JVC. At the beginning they said i need to take the whole thing to service center and so on. But later i made them to tell me what kind of part that is, so here :http://www.jvcservice.com/store/ProductDetail.asp?Part=KTC3199/GL/-T
bought soldering gun in home depot for $15, returned after i was done. And that is it, just have to replace it, but total cost only $12 ($5 part +$7 shipping)

Posted on Mar 14, 2009

dunnbiker
  • 8546 Answers

SOURCE: Just got JVC SP-PWC50 subwoofer and 2 SP-THC60F

Your intended project sounds interesting. I like the idea of retasking older audio gear into modern multichannel sets. One good reason to use older equipment is that the specs, interfaces and interoperability are standardized so you can tell if/how a given amp and speaker will work together. I do it myself.

It looks to me like you have only part of an HTIB (Home Theater In a Box) system that uses a proprietary 8-pin connector and system cord that would come from the base unit/DVD/receiver (the 'brains', which you don't have). It doesn't appear to be designed for compatibility with other units, say, something that would bring in the 5.1 channel audio via either a digital (SPDIF) cable or via 5 separate RCA audio cables.

This subwoofer is self-powered and also provides amplification to up to 5 other speakers, two of which you have.

Their connection to the sub would be via standard speaker cables, likely the Red and White FRONT spring clips. The output terminals are rated up to 16 ohms so attaching a foreign speaker should not be a problem other than its having unpredictable frequency response.

Besides basic connection and signal processing, the missing DVD/Receiver would also decode and direct the 5.1 channels to the Sub and handle level matching of the channels. Without the 'brains' of the system you'll have to get creative to use the individual parts. The 8-pin input connection will be a big problem unless you're adept at getting inside the unit to figure out where things go before they come out at the speaker terminals. Then you'd have to do some rewiring.

UNDERSTAND THIS: Those connectors are OUTPUTS to speakers, not inputs from an Amplifier. If you hook that up wrong you better have a fire extinguisher handy. Kidding. But it could be bad.

The Front speakers are 3 ohm impedance, clearly designed to be used with the amps inside the Sub so I would be careful in trying to drive them with amps that aren't good at handling low impedances. Give it a try AFTER checking the low impedance tolerance of your amplifiers, but easy on the volume.

I would not expect all of this to be a worthwhile effort unless you just like the challenge. Even if you succeed in making a satisfactory electrical connection with your multichannel source as input there is no way to know if it will sound okay. With all-in-one systems the manufacturer may have matched the speakers up with special amplifiers that are designed for 3-ohm speakers and to shape the sound through active internal equalization in such a way as to produce flat response from non-flat-responding speakers - like Bose does, for example, but at least they tell you that's the case.

The stated spec is 200 watts (RMS) per channel at 3 ohms at 100Hz with 10% Total Harmonic Distortion, a very unusable spec. True and honest watts/channel specs look like, "XX CONTINUOUS watts per channel, all channels driven into 8 ohms (20 Hz - 20 kHz, +0.5 dB, -3 dB less than 0.5 percent THD)".

At only 27 lbs with a Power Consumption of only 160 Watts I'd say the Amps/Sub component of the package is a lightweight, literally and figuratively. Apples and oranges when compared to grown-up audio components. It might get loud but not cleanly. But that's just my opinion.

Here's the Owner's Manual for the entire kit...
http://akamaipix.crutchfield.com/Manuals/257/257THC50.PDF

There's some discussion of the features, etc, here...

http://www.crutchfield.com/p_257THC50/JVC-TH-C50.html?tp=195&tab=detailed_info

Posted on Apr 03, 2009

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1 Answer

About how much is a replacement fuse for a jvc sp-pwa6000 & what peticular size is the fuse


there are many types of fuses/volts/amps you need to google your unit to be sure,you dont want to put the wrong one in there and damage the unit.do the research.

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powered subs need a line level input so if the yamaha has this then yes you can

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The subwoofer SP-PWM505 won't turn on.


Make sure its not set to Auto. Also check for a fuse in the back. Unplug the amp side and with the sub plugged in touch the RCA. You should hear noise from sub. Try this last. Some may say this is not good for the sub. Im in the business and never have seen it cause a problem

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Hello Pete. Did you ever get a positive response to your question? I have bought the sub of one of these units, and want to work out how to turn it on and feed a signal into it. Cheers, Matthew in New Zealand

Aug 04, 2012 | JVC TH-M505 System

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I have a LG LHY 518 system and the subwoofer doesnt work. Can I replace it with any LG subwoofer?, or do I need a certain kind of LG subwoofer.


I'd lurk on eBay or other auction sites and see if one becomes available.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/LG-LHY-518-Home-Theater-Systems-manual/id/366ag212/t/2/

LHS-95PAA

Take a clue from that non-standard system cable between the electronics and the sub. It powers the sub's amplifiers and carries signals. Wanna take a chance on the pin-assignments being consistent across all product lines?

Mar 13, 2011 | LG LHY-518 System

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I have the sub woofer and two sp-thc5f front speakers. Can I hook this subwoofer directly to my JVC 56 high def big screen or do I need a dedicated amplifier that works this sub wooofer?


No, the powered subwoofer gets its signal AND power through the DIN connector so you'd have to second guess JVC engineers on which pins are power or signal; and what voltage level it supplies and then you'd have to come up with a source for the power. Managing the volume and relative levels would be a trick, too. Devastation lies down that path.

Get the prescribed JVC electronics or go with a whole new sound solution.

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Amplifier For Powering Sony Xplod xs-l121p5


Pump the brakes!
You need to know the RMS power rating of the sub you are powering.
Dont exceed the RMS power rating of the sub by more than 25%.
If you see a peak power rating on either the sub or the amp, ignor it, means nothing. Always compare RMS ratings.
Example: a Sony 12" Xplod sub, boasting 1200 watts, will only handle, 350 watts RMS, so the amp you choose to power the sub should be 350 watts RMS as well, and should not exceed more than 25% of the RMS power handling (487.5 watts).
Bottom line, know your RMS numbers, not Peak.
Byron
www.distinctbeat.com

Dec 06, 2009 | Sony Car Audio & Video

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Sounds like the amp is playing on full range instead of low


Sometimes the deck needs to be programmed to send only sub frequencies to the sub out. Check the manual or play with the settings. Most likely there is a way to turn it to a sub and a separate setting to change the crossover frequency.

If this is not working, there may be a problem with the Head Unit. If you have another amp in the system, try the sub out in the full range amp AT LOW VOLUME. If not you can use headphones and some alligator clips. Be careful you do not short out the output. Place one alligator on the crown of the RCA plug and one on the post. On the other side, place the crown clip to the connection on the top of the plug and the post on the tip of the plug. If this way you can see if indeed there is full range in the signal. You should here some voice, but not a lot, and a bunch of bass.

If there is too much frequency on the line after these steps then the head unit is not filtering properly and there are two things to be done. Repair or replace the unit. Or circumvent the filtering problem with either an in line RCA Filter or an electronic crossover.

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If the amp produces no boom with no signal input cables connected, I'd suggest using an LOC.

Let me know if you have any other questions.

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