Help with Bass tube install

[memo43]

Ok so either I bought a bad unit or dont know how to wire it.
I have a 8" bass tube to suplement my truck radio.
Its an SCB80 bass cannon
it has two red wires 1 solid red (power)
one red with black stripe (ground)
plus the two speaker wires.

Im assumeing the solid red I should be able to connect it to any key one source and good ground.
when I do this I get no sound comeing from it, I can hear the speaker where it connects (thump sound) and thats it.
should I wire it directly to the battery or find a good power source. I am trying to connect it to the same power source as the head unit.
nothing fancy kenwood head unit with two 6.5 kenwood speakers.

thanks for any and all the help

Memo

[SamMargritz00]

is it the amplified version?

[vegas80step]

a google search says:

"Red is 12v positive; black is negative.

The 2 green wires connect to the left and right negative speaker terminals - it doesn't matter which goes where. Bass isn't directional. However, the speaker wires are undersized. You should replace them w/ 18ga copper speaker wire."


that doesn't work in my head.. but I don't know anything about these things..
id' tap a set of speaker wires.. pos/neg, ground and run an inline fuse to the pos bat.
(even just a wire running out side the truck to test..)

and see if that works

[tubbedII]

Originally Posted by vegas80step

a google search says:

"Red is 12v positive; black is negative.

The 2 green wires connect to the left and right negative speaker terminals - it doesn't matter which goes where. Bass isn't directional. However, the speaker wires are undersized. You should replace them w/ 18ga copper speaker wire."


that doesn't work in my head.. but I don't know anything about these things..
id' tap a set of speaker wires.. pos/neg, ground and run an inline fuse to the pos bat.
(even just a wire running out side the truck to test..)

and see if that works

Ditto! The part about hooking both wires to a negative source just sounds funny...but won't be the 1st time something worked and didn't make sense to me! lol

[memo43]

its the amplified version,
not getting any power to the unit, ill open it up and hope for a loos wire some where.
Thanks for the responces

[MadManAndrew]

The bass tube should be wired directly to the battery, not into any part of the truck's previous wiring. It will draw a lot of current and needs to be properly wired to sufficiently do so. There is not near enough wire feeding that head unit to also feed your bass tube.

Secondly, the stereo circuit is not seperate from the circuit the rest of the truck feeds on. This means that the partial circuit that is created by tapping into the negative feed wire to the speakers is completed by the positive power wire to the bass tube. The fact that electricity doesn't actually flow in any one "direction" is what allows them to do this.

Thirdly, the point behind tapping into both LH- source and RH- source is the same as the point for having directional speakers in the first place.

[memo43]

Thanks for the tip, Ill try it tomorrow and post my results
Hopefully with some pictures

Memo
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[memo43]

thanks for everyone help, but its a bad tube the amplifier is fried oh well,
the search continues

[MadManAndrew]

Sorry to hear. Remember what we've told you when you go to install the next one or you may just as well come up with another bad one!
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[Breadstick]

A friend on high school had a bass tube amplifier go bad. He got a cheap amplifier from Wal-Mart and hooked it up and it worked out extremely well. A small amp might work wonders for this if you give it a shot. Don't give up on it if it's just fried. If you can take it back I'd do that, but don't throw it away if you can't return it.

[502ms]

Those bass tubes need a good ground. They are not grounded to the speakers, as you are basically wiring an amp. What's missing from this equation, however, is the remote turn-on for the amp. A blue wire should be included. This gets the constant +12V from your radio or other switched source, otherwise it is always on, and draining your battery.
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