16 Ohm to 8 Ohm

mark13 · 06-26-2009, 12:47 AM

Hello everyone,
New boy here.

I've got a 1x12 extension cab that has a 16 Ohm G12-75 in it.
My current amp has an 8 Ohm extension cab output.
Is there a way of making the cab 8 Ohms without changing the speaker?

JohnH · 06-26-2009, 02:13 AM

what is your amp?

Jesstaa · 06-26-2009, 05:08 AM

You could put a 16ohm resistor in parallel with the speaker, or series, whatever. That'd halve it down to 8.

PaoloJM · 06-26-2009, 05:18 AM

Quote:

Originally Posted by Jesstaa

You could put a 16ohm resistor in parallel with the speaker, or series, whatever. That'd halve it down to 8.

Depending on the amp, this may not be a great idea as the power resistor may have to dissipate considerable amounts of heat. It will also affect the tone as the resistor will have 16 ohms at all frequencies unlike a guitar speaker.

OP, we can't really help until you let us know the amp type.

mark13 · 06-26-2009, 08:04 PM

Thanks for the help guys.
The cab is a 1912 that's had the 150w speaker changed to a g12-75.
The amp is an Award-Session 75w combo with an 8 ohm extension output.
I got the cab off Craigslist for $50.

Thanks again

jerryjg · 06-26-2009, 10:04 PM

no

JohnH · 06-26-2009, 10:15 PM

Seems like the amp is solid state? if so, you can plug your 16Ohm cab straight in. Theres no risk, the 8 Ohms rating would be a minimum value. Higher Ohms are fine (but only on a solid state amp) although youd not get quite as loud.

John

***Adwex*** · 06-27-2009, 12:41 AM

Quote:

Originally Posted by Jesstaa

You could put a 16ohm resistor in parallel with the speaker, or series, whatever. That'd halve it down to 8.

Bad idea. Better off adding another 16 ohm speaker.

xophrax · 06-27-2009, 12:33 PM

Get a new cab.

mark13 · 06-27-2009, 04:48 PM

Quote:

Originally Posted by JohnH

Seems like the amp is solid state? if so, you can plug your 16Ohm cab straight in. Theres no risk, the 8 Ohms rating would be a minimum value. Higher Ohms are fine (but only on a solid state amp) although youd not get quite as loud.

John

Thanks.
I'm going to try that at the next rehearsal.

Mark

JohnH · 06-27-2009, 07:40 PM

OK, so Im assuming you are confident that it is a solid state amp? - no tubes? I thought it was but you should be sure.

Scrap_Iron · 06-27-2009, 09:43 PM

I looked at the Award-Session website, and assume the OP's amp is solid state.

It won't be the amp's full potential into the 16 Ohm load, but it should be safe to do.

mark13 · 06-28-2009, 10:10 PM

Yes, it's all solid state. It's a Mk II FET model.
The big test is tomorrow.

06-26-2009, 12:47 AM	#1 (permalink)
mark13 Junior Member Join Date: Jun 2009 Location: Santa Monica, Ca Posts: 9	16 Ohm to 8 Ohm Hello everyone, New boy here. I've got a 1x12 extension cab that has a 16 Ohm G12-75 in it. My current amp has an 8 Ohm extension cab output. Is there a way of making the cab 8 Ohms without changing the speaker?

06-26-2009, 02:13 AM	#2 (permalink)
JohnH Senior Member Join Date: May 2008 Location: Wollongong NSW Posts: 640	Re: 16 Ohm to 8 Ohm what is your amp? __________________ DSL401 8412 cab Crate Powerblock 1 x 12 Vintage 30 cab '76 Shergold Masquerader '93 Les Paul Studio '83 Roadstar

06-26-2009, 05:08 AM	#3 (permalink)
Jesstaa Senior Member Join Date: Apr 2009 Location: Gippsland, Vic, Australia. Posts: 797	Re: 16 Ohm to 8 Ohm You could put a 16ohm resistor in parallel with the speaker, or series, whatever. That'd halve it down to 8. __________________ GEAR LIST Marshall JCM900 4100 (6L6) (1995) Marshall Valvestate 1965A cab (????) Cort VX-2V (2008) TUBES/SPEAKERS Power: Groove Tube 6L6GCB Phase Inverter: Sovtek 7025 Pre: V1 - N.O.S Mullard ECC83. V2 National 12AX7A Speakers: Celestion G10L-35 Marshall forever My tube amp & Real Music appreciation forum

06-26-2009, 08:04 PM	#5 (permalink)
mark13 Junior Member Join Date: Jun 2009 Location: Santa Monica, Ca Posts: 9	Re: 16 Ohm to 8 Ohm Thanks for the help guys. The cab is a 1912 that's had the 150w speaker changed to a g12-75. The amp is an Award-Session 75w combo with an 8 ohm extension output. I got the cab off Craigslist for $50. Thanks again

06-26-2009, 10:04 PM	#6 (permalink)
jerryjg Junior Member Join Date: May 2009 Posts: 11	Re: 16 Ohm to 8 Ohm no

06-26-2009, 10:15 PM	#7 (permalink)
JohnH Senior Member Join Date: May 2008 Location: Wollongong NSW Posts: 640	Re: 16 Ohm to 8 Ohm Seems like the amp is solid state? if so, you can plug your 16Ohm cab straight in. Theres no risk, the 8 Ohms rating would be a minimum value. Higher Ohms are fine (but only on a solid state amp) although youd not get quite as loud. John __________________ DSL401 8412 cab Crate Powerblock 1 x 12 Vintage 30 cab '76 Shergold Masquerader '93 Les Paul Studio '83 Roadstar

06-27-2009, 12:33 PM	#9 (permalink)
xophrax Senior Member Join Date: May 2009 Posts: 135	Re: 16 Ohm to 8 Ohm Get a new cab. __________________ "Those who criticize our generation forget who raised it."

06-27-2009, 07:40 PM	#11 (permalink)
JohnH Senior Member Join Date: May 2008 Location: Wollongong NSW Posts: 640	Re: 16 Ohm to 8 Ohm OK, so Im assuming you are confident that it is a solid state amp? - no tubes? I thought it was but you should be sure. __________________ DSL401 8412 cab Crate Powerblock 1 x 12 Vintage 30 cab '76 Shergold Masquerader '93 Les Paul Studio '83 Roadstar

06-27-2009, 09:43 PM	#12 (permalink)
Scrap_Iron Senior Member Join Date: Jan 2009 Location: Austin, Texas Posts: 118	Re: 16 Ohm to 8 Ohm I looked at the Award-Session website, and assume the OP's amp is solid state. It won't be the amp's full potential into the 16 Ohm load, but it should be safe to do.

06-28-2009, 10:10 PM	#13 (permalink)
mark13 Junior Member Join Date: Jun 2009 Location: Santa Monica, Ca Posts: 9	Re: 16 Ohm to 8 Ohm Yes, it's all solid state. It's a Mk II FET model. The big test is tomorrow. __________________ Gear: 9001 9004 DRP-1 8008 8004 1922 x 2

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