Cabinet with 3 speakers?

[toejam]

Thinking of possibly building a cab with 3 speakers... one 10" and two 12". How would this be wired, and for what ohmage?

[ March 21, 2004, 01:02 AM: Message edited by: toejam ]

[jackson1]

Re: Cabinet with 3 speakers?

First i need to know what the ohmage are for each of the speakers you choose.

And would you prefer a total load of 16 ohm?

Typical scenario would be two 12" of 16 ohm each and one 10" in 8 ohm.

A = 10" 8 ohm
B = 12" 16 ohm
C = 12" 16 ohm
Rtotal = 16 ohm

Like this:



/Henrik

[jackson1]

Re: Cabinet with 3 speakers?

Matching the speakers regarding sensitivity (dB/watt) could be a challenge and will be the hardest part in this project.

/Henrik

[charvelguy]

Re: Cabinet with 3 speakers?

I think you could wire all of equal ohmage in parallel as option one. Option two is wire two in series and then those to the last one in parallel as Henrik suggests.

I think Trace elliott has already made a 3x12 tho.. you might want to save yourself some work, but a 2x12+1x10 sounds kinda cool, altho again as Henrik suggests, they would be slightly mismatched.

[jackson1]

Re: Cabinet with 3 speakers?

Originally posted by charvelguy:
I think you could wire all of equal ohmage in parallel as option one.

<font size="2" face="Verdana, Helvetica, sans-serif">Three 16 ohm speakers in parallel = 5.3 ohm
Three 8 ohm speakers in parallel = 2.6 ohm

I wouldn't go below 4 ohm Rtotal and i would recommend hitting either 4, 8 or 16 ohm Rtotal.

/Henrik

[toejam]

Re: Cabinet with 3 speakers?

Thanks! Actually, the amp I'd be hooking it up to is my Mesa F-30 1x12 combo. It's got an 8-ohm Vintage 30. It's got two outputs for 4 ohms each. I know Mesa's cabs are all 8 ohms. I'm not real familiar with ohms and whatnot, so what would be the best for this amp, and would I need to disconnect the combo's speaker or can I use that in conjunction with the extension cab?

[jackson1]

Re: Cabinet with 3 speakers?

To be absolutely sure if you can run the internal speaker + external speakers simultaneously, read the manual for the amp. Probably you can and hopefully there's some guidelines describing different setups.