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post #1 of 11 (permalink) Old 09-07-2010, 04:43 PM Thread Starter
 
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Cab question.

Ok, now this may sound like a stupid question but i can't help but ask.

Soon i'll be aquring a JCM 800 cab, and i want to know if i can plug my 15 watt line 6 spider into it through the headphone jack, i know the answer is probably a no but it's worth asking.

thanks.
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post #2 of 11 (permalink) Old 09-07-2010, 05:00 PM
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Re: Cab question.

Well, if your 800 cab is a 4x12 then it's a 16 ohm load mono input. I doubt your Line 6 has a matched output. Mismatched ohm loads can damage your amp....
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post #3 of 11 (permalink) Old 09-07-2010, 05:01 PM Thread Starter
 
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Re: Cab question.

I'm pretty sure my amp is 4 ohms, so i'm guessing that is a definet no...

thanks.
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post #4 of 11 (permalink) Old 09-07-2010, 06:51 PM
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Re: Cab question.

The headphone outs on most electronics, especially amps, are not direct line outs--they are compensated for lower levels. Whay you could do, and this will require just a basic knowledge of electronics/wiring, is to ad your own speaker output. To do this, take the two wire off of the Line Y speaker, splice in another two leads with a 1/4" phone jack female end. Then hook the original speaker leads back into the Line 6 speaker and you have the new plug dangling from the leads. Run a 1/4" instrument/speaker cable from that to your Marshall cab. Now you'll get sound from the Spider AND the Marshall.



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post #5 of 11 (permalink) Old 09-07-2010, 08:14 PM
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Re: Cab question.

Quote:
Originally Posted by AlaskaBat View Post
The headphone outs on most electronics, especially amps, are not direct line outs--they are compensated for lower levels. Whay you could do, and this will require just a basic knowledge of electronics/wiring, is to ad your own speaker output. To do this, take the two wire off of the Line Y speaker, splice in another two leads with a 1/4" phone jack female end. Then hook the original speaker leads back into the Line 6 speaker and you have the new plug dangling from the leads. Run a 1/4" instrument/speaker cable from that to your Marshall cab. Now you'll get sound from the Spider AND the Marshall.
Might work Bat, but a single speaker usually carries an 8 ohm load- still have the mismatch.
My suggestion is to go to a local electrical tech and have him set up a 16 ohm output jack from the amp - then your matched impedance will make that Marshall scream.
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post #6 of 11 (permalink) Old 09-07-2010, 08:18 PM
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Re: Cab question.

Yeah--the impedance would be the big issue.



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post #7 of 11 (permalink) Old 09-07-2010, 08:19 PM
 
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Re: Cab question.

i don't think you can do that. Thats adding another speaker parallel to the one which is there probably lowers the resistance ,if i remember right, and may damage the amp.
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post #8 of 11 (permalink) Old 09-07-2010, 08:23 PM
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Re: Cab question.

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Originally Posted by Ibanized View Post
i don't think you can do that. Thats adding another speaker parallel to the one which is there probably lowers the resistance ,if i remember right, and may damage the amp.
That's what we're talking about--the impedance is the problem, unless he can get the amp modded for the load.



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post #9 of 11 (permalink) Old 09-07-2010, 08:29 PM
 
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Re: Cab question.

i know nothing about line 6 amps but most amps i have seen you can just unplug the original speaker , and plug in the cab. Maybe the load is switchable on the amps back. Than the amp just powers the cab, and the internal speaker is off.
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post #10 of 11 (permalink) Old 09-07-2010, 09:55 PM
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Re: Cab question.

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Originally Posted by Ibanized View Post
i know nothing about line 6 amps but most amps i have seen you can just unplug the original speaker , and plug in the cab. Maybe the load is switchable on the amps back. Than the amp just powers the cab, and the internal speaker is off.
No--when you "unplug" the original speaker, you just have the two leads, not a phono plug to insert into a cab.



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post #11 of 11 (permalink) Old 09-08-2010, 06:33 PM Thread Starter
 
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Re: Cab question.

Ok then new idea, I'm not sure which cab it is, so it could ither have 8 ohm or 16 ohm speakers, i've heard 16 ohm 4x12's can be wired to 4, 16, and 64ohms. if that's the case i can wire it to 4 ohms and it will be matched....would that work?
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