Question about Cambridge Soundworks BassCube 12 Speaker

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BassCube 12 Startup Problem

I have had a Bass Cube 12 for several years and it has worked flawlessly. It is plugged into the switched outlet on the back of my Marantz receiver. I recently went on vacation for a week and shut down the Bass Cube by turning off the receiver. Upon my arrival back home, I turned on the switch at the power-strip that the amp is connected to. I heard a loud noise similar to a loud ground loop coming from the bass cube. After about a minute, the power LED went off and the ground loop disappeared. From that point onwards, I have not been able to power up the BassCube. There is no light coming from the LED but the fuse appears to be intact. So, at the moment, the unit is dead. If you have any suggestions on how to fix this issue, please pass them along. Thanks

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  • brians_62 Sep 25, 2008

    My Bass cube 12" did something similar...except that now it immediately blows the new fuse right when I plug it in. I think I am just going to toss it in the garbage. Any suggestions? Besides junking it?



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Same here... nothing changed though like a move or wiring etc... just stopped working one day and i realized the fuse popped... now blows fuse as soon as i plug a new one in! Quality product right!?!?! Heading to the store after work today to purchase a 10" def tech... sux!

Posted on Mar 23, 2010

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Same here. happened after moving residences

Posted on Aug 29, 2008


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No speaker output from Basscube 8s

Yes. Check your connections that you are using from your preamp/processor or receiver to the Basscube to confirm that any adjustments I'll give you instructions for will go to the correct output. There are 2 ways that signal can be connected to the Basscube, your inquiry does not describe which you are using; either speaker level or line level. Line level is the easiest as it uses only one cable so I'll assume that is what you've used.

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Hi Ok thanks. I cannot be 100 % sure about this without seeing it but it sounds alot like there is a power supply issue, either bridge rec or caps. Caps are very often very obvious. If you get into it and have a look at what is normally the 2 or 4 biggest capacitors at the start/power supply of the board and see if they are ok visibily. If they are bulged, (often they actually explode and leave paper residue) then those are what need to be replaced. Have a look and see.

If its the bridge rec, it could be 4 diodes, fairly large next to each other or a square component with 4 legs out. Need a meter to test, but i would start at caps first
All the best

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funny seeing this question posted here... I worked at Phoenix Gold for 4 years, and I can help you with your problem.

when the BassCUBE was designed, the engineers didnt realize that a standard phone cable is what we call a "flipped cable", where if you were to lay the cable flat without any twists in it, on one end the connector would be tab up, and the other end would be tab down. on a standard RJ11 plug (the phone plug), the telephone requires that the pinout is as follows:

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But the BassCUBE needs a non-flipped cable, which are hard as heck to find... so I will give you the quick easy fix.

You need a 2-line (4-wire) telephone cable that has a black, a red, a green, and a yellow wire in side it, and you will need 4 crimp caps or other way to splice the wires back together. You then need to cut the wire in half, and carefully seperate and strip each wire on each piece of the cable. Call one piece "Part A", and the other piece "Part B". Then you need to splice the cable back together as below.

Part A Part B

Black ------------------> Yellow
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Once you have done this, and your SURE that your splice is good (not shorted out), then go ahead and plug your modified cable into the BassCUBE and its remote control, power it up, and you should be good to go.

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the correct size fuse is based on amps, not volts. The correct fuse rating should also be displayed on the chassis of your sub, if in doubt take the original one to an electrical shop and let them identify it for you.

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Sounds like a ground loop issue. Try plugging your sub, and the rest of your entertainment equipment into the same outlet with an extension strip (4 plug adaptor). If there is too much stuff to plug into one strip, experiment with combinations and hopefully you will find which piece of gear is the culprit.

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Some componet in the Amp circuit is breaking down. The longer you let this go, the more of a chance that you will have a major short and blow out several parts,m as thats what happens with amps. Get it service asap and dont use it.

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