How to run a 2x12 stereo

[Bobdudeman]

I have a 2x12 cab with a 1960 marshall switch in it. if I switch it to stereo, only one speaker works. mono, both. I'm confused, any suggestions? Thanks, Steve

[Bobdudeman]

I will post a pic

[bassmeknik]

Just looked at a pic of the jack plate on the web, are you sure all the drivers work in mono mode? If so then the problem is likely in the jack plate wiring for the multi-impedance / stereo connection.

[Bobdudeman]

pics of the jack. the two left wires go to the left speaker and the two on the right go to the right. i use the 4 ohm jack because me peavey is 4 ohm as well.

[bassmeknik]

If all the drivers work in mono mode then the problem is likely an easy and cheap fix.

[Bass_Pounder]

In stereo mode, you have to plug into BOTH sides for both speakers to work.

P.S. - That is a guitar cab, watch your volume and EQ'ing or it will be trashed.

[Bobdudeman]

Yes, both drivers work in mono, only the right in stereo.

[bassmeknik]

have you plugged 2 different amps (or a stereo amp) into it? with only one amp connected and in stereo mode you will only get one driver working...

You will need 2 speaker cords.

[Bobdudeman]

I spoke with bag end about the cab. The tec said alot of bass players use them with great results. the drivers are 200 watts each and 8 ohm. i also want to use this with my vox head wich is 4 ohm as well. kinda all around half stack.

[BassmanPaul]

I would imagine that plugging into the right speaker in will allow the right speaker to work. Plugging into the left will enable the left speaker. If that doesn't work then perhaps it's a TRS input as previously noted.

Edit: looking at the photo the jacks are two pole therefore not TRS.

[Bobdudeman]

so if o have to outs on my peavey bass head (peavey mark iii 300 chs xp series) i could run both to the jackplate on the cab? one to the 4 ohm and one to the 16 ohm? Im confused

[Bass_Pounder]

Originally Posted by Bobdudeman

so if o have to outs on my peavey bass head (peavey mark iii 300 chs xp series) i could run both to the jackplate on the cab? one to the 4 ohm and one to the 16 ohm? Im confused

Just run it in mono

[Bobdudeman]

this is of course not the correct plate for this cab, should be on a 4x12 I think

[BassmanPaul]

Now I'm confused. Is the switch for 4/16Ω or stereo/mono???

[Bobdudeman]

You are right, mono is just fine, just figured the stereo aspect would be great for the guitar portion and mabey cool for the bass

[Downunderwonder]

Man, you don't want to go near that cab with two amps. One false move with the switch and you'll have two fried amps.

Use it with the switch set to mono and you are good to go.

[Bobdudeman]

This is what I have.

Originally Posted by BassmanPaul

Now I'm confused. Is the switch for 4/16Ω or stereo/mono???

[Bobdudeman]

You are right, I will just run it on mono, It sounds great as is, just wondered why someone added that jackp[late in the first place. Bag End doesnt do that. As far as amps, I just power down one amp, pull the cable out of the ouit and plud it in the other amps line out and turn it on. No two amps at the same time,

Originally Posted by Downunderwonder

Man, you don't want to go near that cab with two amps. One false move with the switch and you'll have two fried amps.

Use it with the switch set to mono and you are good to go.

[Bobdudeman]

Thanks for everyones input on this. I appreciate this forum and all the knowledge. I am loving my bass playing/practicing. Trying to learn the fundamentals of guitar and bass at the same time. Its gonna be a while.

[gearhead1972]

You can use those switches for 4 ohm mono (left jack) parallel), 16 ohm mono (right jack) series), or 8 ohm stereo (both jacks used with separate amps)