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 Post subject: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 10:36am 
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Plank Cranker Wanker
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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 ?


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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 10:49am 
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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 :D


Last edited by The Traveller on Fri, Jun 20, 2014 10:50am, edited 1 time in total.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 10:49am 
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4 or 16 ohm

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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 10:56am 
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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 10:59am 
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cujo wrote:
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Ok cool. I would go with 16 ohm then. :rock:


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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 11:03am 
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That wiring diagram you said ? That makes the cab 240 watts at 16 ohm correct?


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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 12:22pm 
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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

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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 12:30pm 
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Which schematic use ? Y is Marshall cab diff wiring if it's series par anyway ?


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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 1:19pm 
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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.

Image

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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 1:25pm 
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^^^ Creambacks and V30's. That looks interesting...how's it sounding?


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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 1:37pm 
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Which input jack open or closed jack ?


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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 3:34pm 
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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?

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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 4:10pm 
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lester wrote:
^^^ 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 wrote:
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 wrote:
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.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Fri, Jun 20, 2014 11:30pm 
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maddnotez wrote:
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.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sat, Jun 21, 2014 8:17pm 
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thunda wrote:
maddnotez wrote:
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.


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.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 6:14am 
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Tnx for help everyone !


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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 1:39pm 
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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.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 2:11pm 
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I did this awhile back for somebody here on RT and still had it saved

Image

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 4:48pm 
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maddnotez wrote:
thunda wrote:
maddnotez wrote:
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.


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.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 5:42pm 
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bwgintegra wrote:
I did this awhile back for somebody here on RT and still had it saved

Image


The diagram above is the same as this one.

Image

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 9:34pm 
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Scumback Speakers wrote:
bwgintegra wrote:
I did this awhile back for somebody here on RT and still had it saved

Image


The diagram above is the same as this one.

Image


Right on brother, looks good! A lot better than my hand sketch :lol: :LOL:
Also like how it states how to position the speakers for easy wiring and short runs.

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 Post subject: Re: Help wiring a 4x12
PostPosted: Sun, Jun 22, 2014 10:59pm 
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bwgintegra wrote:
Right on brother, looks good! A lot better than my hand sketch :lol: :LOL:
Also like how it states how to position the speakers for easy wiring and short runs.


I'm into KISS, keep it simple stupid! Basically, I know I need it simple, so I have to figure there are others that do, too! LOL

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