Question about RCA RS2656 Shelf System

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Full sound not working

The speakers seem to not be working correctly because only the tweeters are working and no bass or anything full is coming through.

I've tried the power source, unplugging the speakers re-plugging them and all that. I haven't opened the stereo up yet. Some help would be appreciated!

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Re: 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.

Posted on Mar 12, 2011

Re: Full sound not working

Upon opening it up i saw 2 of the 4 7amp fuses were blown....nice to actually see fuses in this day and age ;)
i replaced them and they instantly blew again....
i must go further and try to figure it out because i hate change.....there are no systems out there in any price range that i woud want to take the place of this one for me.

Posted on Nov 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


Basic HiFi troubleshooting.

First things first. The unit doesn't switch on.
- Is it plugged in?
- Is the fuse blown?
- Does it look like it's suffered damage?

It switches on, but won't play anything / the lights come on, but no sound.

- We'll start at connections. Is your MP3 player/ iPod/ CD player/ record deck plugged in correctly?
- Are the speakers plugged in correctly/ at all?
- Is it in protection mode - this is a pretty standard thing now, where the amplifier tries to deliver more than it's rated current (ie, into a short circuit), and it cuts out. The only way to fix this is to take it to a local hifi shop, who will reset it (there's usually a small fee involved). The unit will be fine after that.

------- There is no bass. ----------
A few causes for this, so there's a few solutions.
- The speakers are out of phase. This is where one speaker is wired normally, one is wired in reverse. The bass from each speaker is "opposite" and would cancel out. To solve this, Make sure the + on the speaker is connected to the + on the amplifier. There's usually a stripe on the cable to help you determine this.
Cause # 2
The eq settings on your ipod/ unit have been messed with.
Set all the equiliser settings to flat, then readjust them to taste.
Cause # 3 (nasty one)
You've blown a woofer. The explanation is this - the speakers have taken in too much power, the bass unit has got too hot and the glue holding the coil in place has melted. Usually, the woofer can't be physically pushed when this happens. To solve this, it's new speaker time. An alternative is to see if you can get a recone kit for said speaker, and try to fix the voicecoil yourself. This isn't recommended to those who are new to the idea.

I hope this helps the reader.

on Jan 08, 2010 | Sony LBT-ZX6 Shelf System

1 Answer

If the speakers vibrate especially when the mega bass is on, does that mean that the speakers are blown on my icf-cdk50?

Real low bass is mostly vibration. Anything that has a "mega bass" 'enancement' is cutting corners to make up for bass-reproduction shortcomings. Speakers measuring 2-5/8' have no business reproducing real bass. Blown speakers would be silent. Torn cones from excessive volume might sound like unwanted vibration. Your vibration might be a resonance of the unit's own housing, mounting hardware or something nearby. Try moving it to another location.

These units are not economically repairable. If you like it and you think it's broken you might snag a whole new on on eBay with wise bidding.

May 10, 2011 | Sony ICF-CDK50 Under Counter CD...

1 Answer

Do these speakers work better with an amp? I am playing them now and they sound muffled using a regular shelf system

No models given, so a guess is what you get.

If your shelf system is not producing sufficient clean audio power you'll get distortion, which can kill a speaker faster than excessive clean power. Muffling is something else altogether. Are the tweeters working?

Feb 05, 2011 | Insignia 6-1/2" Bass-Reflex Bookshelf...

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

1 Answer

Sound quality bad i can hear bass but really no treble or mids

Could be that those speaker components (mid-range spkr., tweeter) are blown. Try hooking up a similar type speaker and see what happens.

Apr 12, 2010 | Aiwa XR-M55 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...

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
Please kindly rate this solution
direct FixYa link:

Mar 21, 2010 | Audio Shelf Systems

1 Answer

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

No sound from mids and bass

there is prolly just a short in the wire somewhere

Nov 28, 2007 | RCA RS2656 Shelf System

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