Question about JVC MX-J70 Shelf System

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Opening up Speakers

One of the tweeters on a main speaker has blown and 'buzzes'. I want to take it out to replace it, but I have no idea how to open up the speaker 'cabinet' on this system. There are no screws to be found anywhere. I can get the front grill off, but that doesn't help me at all. How do you open up the speaker box?

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Re: Opening up Speakers

I it wood or plastic? if you cant easily pry the 'screen' in front off and there are no screws, your best bet is just to find a new speaker box to put new speakers in... only way to open it is to tear it apart, unfortunatly.. if you do decide to open it, CAREFULLY cut the screen off with a razor or exacto knife, once inside you'll know better what your dwaling wiht...good luck

Posted on Jan 27, 2007

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Nothing needs fixing but i want to change or get replacement speakers but i am unsure weather i can and which way to go about it if i can

Part numbers of the speakers:


901 GBOXSA125AW01 BH Wooden Box Assembly

902 CPNLSA055AW04 AY Front Panel Assembly

903 TSPC-A694AWZZ AC Label, Specification

904 LHLDZA177AWM1 AQ Super Tweeter Assembly

905 PCUSGA020AWZZ AB Cushion, Foot

906 XEBY730P10000 AA Screw, M3 x10mm

907 XEPY740P16000 AB Screw, M4 X16mm

908 XESY730P10000 AA Screw, M3 x10mm

SP1,2 RSP-ZA236AWZZ BD Woofer

SP3,4 RSP-ZA179AWZZ AR Tweeter
Code first three numbers are layout numbers, then there is the actual part code you can quote. The two letters are a price code which you can ignore and the final bit is the description.


901 GBOXSA070AW01 BG Wooden Box Assembly

902 CPNLSA030AW03 BE Front Panel Assembly

903 HDECQA136AWSB AM Cover, Edge Light

904 HDECQA135AWSB AN Panel, Edge Light

905 PCUSSA013AWZZ AD Port Cushion

906 PCUSGA020AWZZ AB Cushion, Leg

907 XEBY726P10000 AA Screw, M2.6x10mm

909 XMBY740P16000 AC Screw, M4X16mm

910 TSPC-A693AWZZ AC Label, Specification

911 PFLT-A018AWZZ AF Felt A

912 PCUSGA051AWZZ AF Support Cushion

913 PFLT-A020AWZZ AF Felt B

SP1 RSP-ZA077AWZZ BH Speaker
Full service manual here. Free

Apr 27, 2016 | Sharp CD-SW330 Shelf System

2 Answers

No bass

If you hear a very high pitch hissing sound coming out from one channel then probably your amp final is gone, in that case you will need to work at component level to fix it

Feb 19, 2008 | Audio Shelf Systems

1 Answer

Connect JVC MX-GT88 speakers to a differant reciever

If it has a bi-amp, you can connect the speakers to it. By the amplifier, if it's a stereo with bi-amp, be sure that it has at least 400 watts and up in order for the speakers to turn out great, if a receiver like a integrated amplifier, it may have like 2-10 connections, you can connect the speakers all together if it has more than 3 connections, if below 3, you may need to take the speakers apart and make it 3 way by connecting one wire to the tweeter, another wire from the tweeter to the main or mid speaker then one more wire from the main or mid speaker to the sub.

Feb 03, 2014 | JVC MX-GT88 CD Shelf System

1 Answer

Can't get wharfedale melton 2 tweeter to work. Looked inside cabinet and need advice on internal wiring please. These are very old but one works perfectly and the 12'' bass driver on the problem speaker is...

The tweeter has burned out and cannot be salvaged. I also own a pair of (ex) Melton 2s. In the beginning Wharfedale were good at supplying spares (see for contact info and advice). A few years ago after my cat destroyed the 12 inch unit in one, i invested in new insides, including state of the art 12 inch woofers, 4 inch mid range and 1inch tweeters with a good 3 way crossover. The cabinet is great so consider asking a techie friend to do this for you. Please don't just cut out and connect to amp speaker wires! You will get terrible sound and risk ruining both amp and speakers! Best regards Karl (

May 12, 2010 | Audio Shelf Systems

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Can't get wharfedale melton 2 tweeter to work. Looked inside cabinet and need advice on internal wiring please. These are very old, but one works perfectly and the 12'' bass driver on the problem speaker...

All the electronic parts you can see inside the speaker (usually capacitors, coils and resistors) are responsible for breaking the full audio band (bass - middle - treble) in parts (2 for your case) and feed each part to the appropriate speaker. By that I mean that you must not use your speaker without the cross-over (this is the name of the circuit) since this can harm your speakers. The sound from a speaker without crossover will be terrible for your ears too. Eventhually you can try to connect your tweeterat the amplifier's output leads, assuming that the volume level will be very low. Using this connection you can just check if the tweeter is working ok or not, so you can find where is the problem. By the way I don't think that a coil is burned out, try to see some resistor possible burned out.

In case of a problem or clarification, don't hesitate to post.

Thanks and regards
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Mar 21, 2010 | Audio Shelf Systems

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I have just brought a 2nd hand Technics EH 780 but can't get the tweeter to work on the speakers, is it a problem in the set up of the amplifier?

Disconect the speaker(s) from the system. With a 1.5 volt battery touch the negative wire to the - of the battery. And for a short time only, the plus wire to the + of the battery. You should hear a pop! You might need to put your ear to the tweeter to hear it working. if it doesn't make any sound it's not working. Before chasing around for a new tweeter, open the speaker up and apply the test to the tweeter itself. If it now works the crossover part is faulty.
Tweeters are often the first to go when people run the amp at high volumes, so both could have gone!

Jan 18, 2010 | Technics SC-EH780 CD Shelf System

1 Answer

SP-UXV30 speakers


Offhand, the tweeter can be rated similarly to that of the woofer but not lower than 26 watts. I think your concern should also include the physical mounting and size since most branded units would be using proprietary components/parts and are not readily available.

Most electronics parts store would be carrying "generic" tweeters and "as per sample" would be your best basis. If I understand it right, **** Smith in Australia would be similar to Raon Stores in the Philippines or Akihabara in Japan.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Mar 25, 2008 | JVC FS-V30 CD Shelf System

1 Answer

Buzz or annoyign static sound from speakers when CD is played

you can either use good quality thick insulated wires, also keep the power source far from speakers also try to keep the speakers little away from main unit.


Mar 20, 2008 | Teac CD-X8 CD Shelf System

2 Answers

Full sound not working

I had the same problem and also traced it back to two of the four 7-amp fuses were blown. I replaced the fuses, but they immediately blew again. I used higher capacity fuses (10 amp) to see how bad the problem was and those blew. Testing the problem a third time with the speakers disconnected yielded the same results.
There's an internal short in the system.
The solution? Don't buy RCA again.

Nov 12, 2007 | RCA RS2656 Shelf System

2 Answers

Rear Speaker problems

The delay is normal as it's designed to create a spacious large room sound. The buzz however, is not. It sounds like the power supply is bleeding into the amp and should be serviced.

Jun 01, 2007 | Aiwa NSX-DS55 CD Shelf System

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