#1
Hey

Noob question here

on the amp head I can change the impedance to 4,8 and 16 ohms, and on the specs for the cab it says;
# Impedance Stereo/Mono: 8 Ohm, 16/4 Ohm

So what should I set the impedance to on the amp?
I've usually got it set to 8, so am I doing it right?

Thanks
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#3
the cab is a Marshall 1960A
the head is a Peavey 6505
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#4
bump since my question hasn't been answered...

I'll delete this thread as soon as it is
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We play some goffic pish
Its fun

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#5
8Ohm for mono use, the 1960 has a switch to change impedance in stereouse, but for mono its 8 Ohms. Thats at least what I think.
Gear:
Ibanez SZ320 -> Höfner Analouge Delay -> MXR GT-OD -> Laney GH50L -> T.C.Electronics GMajor -> Line6 4x12 w/ Celestion G12T-75


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#6
Quote by OrangeWalls
8Ohm for mono use, the 1960 has a switch to change impedance in stereouse, but for mono its 8 Ohms. Thats at least what I think.
Nope.
The Marshall 1960 series cabinets are 4/16 ohms MONO and 8 ohms STEREO.

Set your amps impedance to 16 ohms and set the cabs switch to mono 16 ohms.
MARSHALL JVM 210H
PEAVEY JSX
KRANK 412
MESA 412
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#7
^+1

The speakers must be 16ohms each, if it is a 4x4 cab.

Mono @ 4 ohms = 4 x 16 ohm speakers wired in paralell - set your head to 4ohms
Mono @ 16 ohms = 4 x 16 ohm speakers wired in series/paralell - set your head to 16 ohms
Stereo @ 8ohms = 2 x 16 ohm speakers in paralell - set your head to 8ohms. There should be two stereo inputs on the cab, for two seperate 8ohm heads.
#8
Quote by Van Noord
Nope.
The Marshall 1960 series cabinets are 4/16 ohms MONO and 8 ohms STEREO.

Set your amps impedance to 16 ohms and set the cabs switch to mono 16 ohms.


Dammit I'm so sorry
Gear:
Ibanez SZ320 -> Höfner Analouge Delay -> MXR GT-OD -> Laney GH50L -> T.C.Electronics GMajor -> Line6 4x12 w/ Celestion G12T-75


My Lyrics and Poems


"with golden hair and perfect eyes,

with hollow words and empty lies."
#9
aah... would this make any difference to the sound of my amp?
My Band =]
We play some goffic pish
Its fun

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#10
Marshall 1960a with stock speakers are 16ohm. Be sure that the cab hasn't been retro fitted with other speakers. You can check the input jack with a volt meter for ohms.
AL
#11
nah, I bought it from gak, I'm pretty sure it'd be stock speakers

So I should have the amp set to 16 ohms...

will I have caused any damage by having it set to 8?
My Band =]
We play some goffic pish
Its fun

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#12
^

If the amp has been set to 8ohms, and you've had it in one of the cab's stereo inserts, you'll be fine, but you'll be only playing out of two speakers.

If the amp has been set to 8ohms, and you've had it in the cab's mono 16ohm insert, you'll be fine too, but you'll have been playing with some power loss.

If, however, the amp has been set to 8ohms and you've been playing through the cab's mono 4ohm input, you'll be liable to be putting the power section under a lot of stress. I'm pretty sure damage in this instance would be noticable, so if all sounds fine, then I think you're okay. But never have a lower impedance rating in the cabinet to that of the head.

Basically, set your head to 16ohms, and play through the 16ohm mono input on the cabinet. Or set your head to 4ohms, and play through the 4ohm mono input on the cab. Not sure if there is a beneficial reason to play at 4ohms over 16ohms... anyone?
Last edited by Mathamology at Feb 24, 2009,
#13
hmm... I don't even think the cab has a selection switch on it...

But if the power section got damaged, would the sound just cut out, or would there be depredation to the tone?
My Band =]
We play some goffic pish
Its fun

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#14
If you are unsure set the head to 8ohms. It won't harm the head. If you set the head to 16 and cab is 8 you could do $$$damage.
AL
#15
hmm, is there any difference in sound between 4, 8 and 6 ohm settings?
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We play some goffic pish
Its fun

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#17
hmm, well I'll see what it says next time I get to see my amp :P

Thanks man
My Band =]
We play some goffic pish
Its fun

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#18
Quote by FNAFJ
hmm, is there any difference in sound between 4, 8 and 6 ohm settings?
I find the lower the ohm rating the better the low and high freq's sound to my ears. Maybe not "better", but more contained I guess.
At 16 ohms, you are using the most of the windings in your output transformer therefore getting the most out of it. I typically find amps set to 16 ohms played through 16 ohm cabs to have somewhat slightly extended treble projection.
MARSHALL JVM 210H
PEAVEY JSX
KRANK 412
MESA 412
FENDER STRATS
DIMARZIO
CELESTION