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Old 13th July 2007, 08:01 PM   #1
Dtorre is offline Dtorre  United States
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Default Please Help With Wireing My Cab!!!

im basicly building my cab from the empty shell of a marshall avt150h cab (which has one speaker cable input) and i have 4 12" celestion speakers that are 16 ohm each... the head i want to use is a marshall MODE 4 head which has only 8 and 16 ohm outputs. i know i cant wire these speakers to 8 ohms... so can someone either tell me in detail or give me a diagram on how to do this???? PLEASE... i just bought these amazing speakers, and am dieing to use them haha.

-Dave
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Old 13th July 2007, 08:43 PM   #2
Petriej is offline Petriej  United States
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Wire two of the drivers in series. (Group 1)
-Take a wire and connect the negative terminal from one driver to the positive terminal of the other driver.

Then wire the other two in series. (Group 2)
-Same as group 1 but the other two of four drivers.

Take the (unconnected) positive lead from Group 1 and connect it to the 16 ohm output. Take the (unconnected) negative lead from the other driver in Group 1 and connect it to the 16 ohm output.

Do the same thing for Group 2, so that your amp's 16 ohm output has 2 positive wires and 2 negative wires.

That should be a load as seen from the amp of 16 ohms.

Hope it sounds great! If you need a diagram I can prolly draw one up for you. Good luck.
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Old 13th July 2007, 09:25 PM   #3
Dtorre is offline Dtorre  United States
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yah, if you could draw a diagram that would be amazing.
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Old 13th July 2007, 09:47 PM   #4
Petriej is offline Petriej  United States
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Hope this helps:
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Old 14th July 2007, 09:22 AM   #5
Dtorre is offline Dtorre  United States
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THANKS SOOO MUCH! it sounds absolutely amazing... and now i can rock with 320 tube watts of power haha!
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Old 19th July 2007, 09:27 AM   #6
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by Dtorre
THANKS SOOO MUCH! it sounds absolutely amazing... and now i can rock with 320 tube watts of power haha!

Hmmm .........

Its a valve / solid state hybrid, you likely need another 16 ohm 4x12
to liberate the full 350W. The effect of adding another 16 ohm 4x12
will not double volume (+10dB), it will add 6db, the stack will go as
loud as one 16 ohm 4x12 driven by 4 times the power.

Or in other words 3dB louder than a very similar 8 ohm 4x12.

/sreten.
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