!2x12 speaker cab question!

Shawnvs

Hi,

I cant carry my 4x12 (greenbacks) cab around town any more, so I decided to use my 2x12 instead.

I removed the speakers in the 2x12(black standard) and replaced them with the 2 greenbacks.

My amp's ohms are set at 8 and each speaker is 16ohms.

I tried the amp and new speakers, and it works fine. I boosted the volume; works and sounds like your first kiss.

Is it fine? Can I expect to play for next few months without expecting fireworks again? Or should I change my ohm settings on the amp immediately?

matta

Shawnvs wrote Hi,

I cant carry my 4x12 (greenbacks) cab around town any more, so I decided to use my 2x12 instead.

I removed the speakers in the 2x12(black standard) and replaced them with the 2 greenbacks.

My amp's ohms are set at 8 and each speaker is 16ohms.

I tried the amp and new speakers, and it works fine. I boosted the volume; works and sounds like your first kiss.

Is it fine? Can I expect to play for next few months without expecting fireworks again? Or should I change my ohm settings on the amp immediately?

General rule of thumb is that you should ALWAYS match your amp and speaker impedance, though certain amps had output trafos that allowed for tolerance mismatching ala a Fender Twin for eg.

If you parallel your 2 speakers you will get 8 Ohms, so it will match your amp output impedance... simple fix ?

Cheers

Matt

Shawnvs

Ok. I think my speakers are parallel. I simply copied the wiring of the previous 2 that were in there.

matta

Shawnvs wrote Ok. I think my speakers are parallel. I simply copied the wiring of the previous 2 that were in there.

Then you should be fine... Resistance is HALVED when you parallel two speakers of the same value... they are doubled if in series, so 2 x 16 ohms paralleled will give you 8 ohms. Likewise if you placed two 4 ohms in series you would have 8ohms.

Cheers

Matt

FenderBender

+1 Matt

This simple diagram shows connection details for series and parallel speaker connection:
http://www.pichost.co.za/v/SxyURYqfrKjzyssaRRECGgKpqtE977r5fFVlMK4P

Shawnvs

Thanks guys. I think this guitarforum gives all international sites a run for their money. You guys are all really helpful and polite. Nice one S.A! *high five*

matta

Shawnvs wrote Thanks guys. I think this guitarforum gives all international sites a run for their money. You guys are all really helpful and polite. Nice one S.A! *high five*

Whoa, you mean I'm coming off as polite and friendly! What kind of a message am I leave for the youth... this is SOOO not rock n' Roll. ? Glad we could be of help and happy playing, maybe that 2x12 be a weight off your shoulders and back... literally!

Cheers

Matt

Shawnvs

Well, I have been using the 2x12 for probably 4-5 years now. the 4x12 always stayed at home as a coffee table (DONT SHOOT ME, I have a slipped disc). I finally had the brain and guts to take 2 speakers out the original 4x12 and this week finally put them where they belong. in my current rig with da 2x12.

aja

What are you going to do with the remaining two speakers?

Shawnvs

Hey AJA.

Well those are sitting under my table at the moment. I do have issues with letting go of old gear, so its probably gonna stay with me till I die, or one day when I am touring the world it will be part of my stadium rig ?