Help wiring a 4x12

cujo · Jun 20, 2014

4x12
V30- 60 watt each 16 ohm 4 of them.

I want to wire for one jack... Do I do 16 ohm or 8 ohm?
And do u guys have a diagram ?

The Traveller · Jun 20, 2014

Kinda depends on the amp. If it's a Mesa wire it up for 8 ohm. For some reason they just sound better with 8 ohm cabs. Anything else I would probably go with 16 ohm.

Here is a diagram. Third one from the top, the series-parallel one.

http://www.colomar.com/Shavano/4x12wiring.html

edit: because I forgot the damn link

peterc52 · Jun 20, 2014

4 or 16 ohm

cujo · Jun 20, 2014

6505+

The Traveller · Jun 20, 2014

cujo":36945wcg said:
6505+

Ok cool. I would go with 16 ohm then. :rock:

cujo · Jun 20, 2014

That wiring diagram you said ? That makes the cab 240 watts at 16 ohm correct?

stoneage cabs · Jun 20, 2014

If you want a V30 240 watt 16 ohm mono 4x12 go with series/parallel.

Here's how:
http://www.scumbackspeakers.com/wire.html

http://www.jensentone.com/wiring_diagra ... &watts=100

cujo · Jun 20, 2014

Which schematic use ? Y is Marshall cab diff wiring if it's series par anyway ?

Erock · Jun 20, 2014

I don't have a diagram, but I just wired up a 16ohm cab and took a pic for a friend. All are 16ohm speakers. Each pair, left and right, are wired in parallel(16x16 in parallel is 8ohm). Those 2 pairs of 8ohm are wired in series with the jack. 8 + 8 in series is 16ohm.

lester · Jun 20, 2014

^^^ Creambacks and V30's. That looks interesting...how's it sounding?

cujo · Jun 20, 2014

Which input jack open or closed jack ?

maddnotez · Jun 20, 2014

Just a random question. Why are you guys recommending the highest possible ohms?

The op will never know until he tries all the combos but I prefer the lowest possible ohms.

If you plan to run several cabs I can understand highest but otherwise, is it just preference?

Erock · Jun 20, 2014

lester":35tvg9ex said:
^^^ Creambacks and V30's. That looks interesting...how's it sounding?

It sounds great IMO, they give me a bit of that greenback growl but keep everything tighter. I seem to always gravitate back to V30, so I keep crossing them. These and Scumback J75 have been my favorite combos so far.

cujo":35tvg9ex said:
Which input jack open or closed jack ?

Not sure what you mean man, it would be the main jack, not the parallel daisy chain jack.

maddnotez":35tvg9ex said:
Just a random question. Why are you guys recommending the highest possible ohms?

The op will never know until he tries all the combos but I prefer the lowest possible ohms.

If you plan to run several cabs I can understand highest but otherwise, is it just preference?

Personally, I do it because I have multiple cabs, and I'm used to how the parallel/series wiring sounds. I think it does make a difference if they are all parallel or series.

thunda · Jun 20, 2014

maddnotez":16cr4mds said:
Just a random question. Why are you guys recommending the highest possible ohms?

The op will never know until he tries all the combos but I prefer the lowest possible ohms.

If you plan to run several cabs I can understand highest but otherwise, is it just preference?

If you have a tube amp with a multiple ohms selector (4, 8, 16 ohms), you will utilize a different amount of the windings in the output transformer. Set at 16 ohms settings, you will achieve full power with all the windings in the transformer. At 8 ohms setting, 1/2 of the transformer windings will be used, producing a bit more stress and heat in the transformer. At 4 ohms setting, you will use 1/4 of the windings in the transformer causing even more stress and heat to be produced. And at any setting with a tube amp, you will produce the same power (not so with solid state). So, if you can get 100 watts at 16 ohms, why use 4 ohms for the same 100 watts and build up stress/heat in the transformer?

Now if you run two 16 ohm cabs, you can set impedence to 8 ohms and still get the 100 watt output. Two 8 ohm cabs, set to 4 ohms. Still same power output (with tube amps). With solid state amps, higher impedence equals lower output power.

maddnotez · Jun 21, 2014

thunda":3vebbeft said:
maddnotez":3vebbeft said:

Just a random question. Why are you guys recommending the highest possible ohms?

The op will never know until he tries all the combos but I prefer the lowest possible ohms.

If you plan to run several cabs I can understand highest but otherwise, is it just preference?

Click to expand...

If you have a tube amp with a multiple ohms selector (4, 8, 16 ohms), you will utilize a different amount of the windings in the output transformer. Set at 16 ohms settings, you will achieve full power with all the windings in the transformer. At 8 ohms setting, 1/2 of the transformer windings will be used, producing a bit more stress and heat in the transformer. At 4 ohms setting, you will use 1/4 of the windings in the transformer causing even more stress and heat to be produced. And at any setting with a tube amp, you will produce the same power (not so with solid state). So, if you can get 100 watts at 16 ohms, why use 4 ohms for the same 100 watts and build up stress/heat in the transformer?

Now if you run two 16 ohm cabs, you can set impedence to 8 ohms and still get the 100 watt output. Two 8 ohm cabs, set to 4 ohms. Still same power output (with tube amps). With solid state amps, higher impedence equals lower output power.

Hey great info Ty. This is good to know.

So I guess that I prefer that stressed transformer sound lol.

Now that I know this, not enough of a difference for me to potentially damage the transformer.

cujo · Jun 22, 2014

Tnx for help everyone !

~Abstract~ · Jun 22, 2014

IMO it depends on if you're gigging or not.

Gigging...go with 16ohm
Home use...go with 4ohm

You'll get a little more bass with 4ohm...and it feels tighter.

With 4 16ohm speakers you can't get 8ohms...and use them all.

bwgintegra · Jun 22, 2014

I did this awhile back for somebody here on RT and still had it saved

389E0704-BFB8-4F57-88C9-842CADF1C224-950-0000013E4CCC3F77.jpg

thunda · Jun 22, 2014

maddnotez":3a37vljz said:
thunda":3a37vljz said:

maddnotez":3a37vljz said:

Just a random question. Why are you guys recommending the highest possible ohms?

The op will never know until he tries all the combos but I prefer the lowest possible ohms.

If you plan to run several cabs I can understand highest but otherwise, is it just preference?

Click to expand...

If you have a tube amp with a multiple ohms selector (4, 8, 16 ohms), you will utilize a different amount of the windings in the output transformer. Set at 16 ohms settings, you will achieve full power with all the windings in the transformer. At 8 ohms setting, 1/2 of the transformer windings will be used, producing a bit more stress and heat in the transformer. At 4 ohms setting, you will use 1/4 of the windings in the transformer causing even more stress and heat to be produced. And at any setting with a tube amp, you will produce the same power (not so with solid state). So, if you can get 100 watts at 16 ohms, why use 4 ohms for the same 100 watts and build up stress/heat in the transformer?

Now if you run two 16 ohm cabs, you can set impedence to 8 ohms and still get the 100 watt output. Two 8 ohm cabs, set to 4 ohms. Still same power output (with tube amps). With solid state amps, higher impedence equals lower output power.

Click to expand...

Hey great info Ty. This is good to know.

So I guess that I prefer that stressed transformer sound lol.

Now that I know this, not enough of a difference for me to potentially damage the transformer.

No - transformers actually are pretty tough. I've often run mine at 4 ohms with two 8 ohm cabs - no problem. I also have a 4 ohm cab with 4x10 Jensen mods in it. Sounds great.

Scumback Speakers · Jun 22, 2014

bwgintegra":3afkypm5 said:
I did this awhile back for somebody here on RT and still had it saved

The diagram above is the same as this one.

Help wiring a 4x12

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