#1
Yeah.
Basically, I'm so confused with ohms that it's not funny!

I have a project in mind, 4x12 cab to replace my crappy cab. It was going to be equipped with 4 celestions, 2 v30's, and 2 G12T-75's.
If all 4 of the speakers are rated at 8 ohms, in a series, what is the total rating?
What about if they were all rated at 16ohms each?

Thanks.
Signatures are overrated.
#3
read this, it will answer most questions.
Suhr Custom, Flaxwood Rautia or Grosh Tele thru
HBE Medicine Bawl Wah
Analogman BiComp
Texas Two Step OD
Fulltone Ultimate Octave/Fuzz
Boss CE-2
TC Nova Delay
SLO-100, 65 London or Bogner Shiva
Ask me about any of this stuff!
#4
Suhr Custom, Flaxwood Rautia or Grosh Tele thru
HBE Medicine Bawl Wah
Analogman BiComp
Texas Two Step OD
Fulltone Ultimate Octave/Fuzz
Boss CE-2
TC Nova Delay
SLO-100, 65 London or Bogner Shiva
Ask me about any of this stuff!
#5
Quote by Moe.
Yeah.
Basically, I'm so confused with ohms that it's not funny!

I have a project in mind, 4x12 cab to replace my crappy cab. It was going to be equipped with 4 celestions, 2 v30's, and 2 G12T-75's.
If all 4 of the speakers are rated at 8 ohms, in a series, what is the total rating?
What about if they were all rated at 16ohms each?

Thanks.


If you put 4 speakers rated at 8 ohms each in series the total resistance will be 32 ohms. If they were 16 ohms each then you would have a total resistance of 64 ohms. I presume you want a total resistance of 8 ohms, which would require wiring pairs of speakers in parallel and then wiring those pairs together in series. I think.
Quote by Kensai
Racism... against the human race? Sure, go ahead
#6
with four 8 ohm speakers you can get 2 ohms, 8 ohms, or 32 ohms. with four 16 ohm speakers you can get 4 ohms, 16 ohms, and 64 ohms. guitar heads usually use 4, 8 or 16 ohms, so you need to see what your head uses. heres what to do in each case:

4 ohms - four 16 ohm speakers in parallel
8 ohms - four 8 ohm speakers in series-parallel (two sets of two in series, with the two sets in parallel)
16 ohms - four 16 ohm speakers in series-parallel
#7
Quote by handlerb



Brain.......hurts.....

okay, I understand that you can get 2 ohms with 2 3 ohms speakers but how can you get 4 or 8 ohms?
My obligatory gear list

Guitars
Schecter C-1 Classic
Gibson SG Special
1987 Fender Strat
Epiphone PR-150

Amp and Effects
Peavey Valveking 112
Boss DD-6
Crybaby Wah-wah
Ibanez TS-9DX
Banshee 2 Talkbox


Crit plz! Wh ore of Gommorah
#8
Ok, the math is pretty simple.

Series speakers (or any impedance or resistance) just adds normally. Two 8's add up to 16. Simple enough.

Parallels are more complicated. In words:

You add up the inverse of each impedance or resistance, and then take the inverse of the result. Ok, in actual math stuff:

Two 8 ohms in parallel - first, add the inverse of each:

(1 / 8) + (1 / 8) = 0.25

Now, take the inverse of the result:

1 / 0.25 = 4 ohms

Now, series/parallel combinations work the same way. For example, two 8's in series which are wired in parallel with two other 8's in series - first, the 8's in series add up to 16 each. Now, two parallel 16's:

(1 / 16) + (1 / 16) = 0.125

Now, take the inverse:

1 / 0.25 = 8 ohms

There will be a quiz at the end of the semester!
#9
Here's a comprehensive link, with pictures!
http://colomar.com/Shavano/4x12wiring.html
Jackson KV 2, Jackson COW 7 (both in B), Jackson Demmelition V
Bogner Überschall (blue rev)
Marshall 1960B Vintage (2x V30 & 2x G12T75)
TC Electronic G Major
BBE Sonic Maximizer 422A
Weber Mass 150w
ISP ProRackG
T.Racks Dinopower