Different readings with switchable Marshall MF280 cab...please help?

philbinator1 · February 26, 2010, 06:14:15 AM

Hey guys, i just rewired my 4x12 cab (loaded with 16ohm vintage 30's) to be switchable between 4/16 ohms. i'm aware of the fact
that i can't get a totally accurate reading with my digital multi meter because the speakers measure in impedance; but i know i can get
a ballpark figure for both 4/16 ohms using resistance. the problem is, i don't know at which points to test at. i've tried diff points
and sometimes i get 3.6/13 ohms, sometimes 3.6/6.8 ohms. do you guys know which points to measure at?

here is the diagram i'm working off: http://www.colomar.com/Shavano/4x12wiring.html
and i'm using the 10th diagram down.

I would appreciate any help, thanks

anchovie · February 26, 2010, 06:41:39 AM

It would seem logical to measure at the socket that your speaker cable plugs into. This is the point at which your amp will connect to the cab, after all!

philbinator1 · February 26, 2010, 06:49:18 AM

Quote from: anchovie on February 26, 2010, 06:41:39 AM
It would seem logical to measure at the socket that your speaker cable plugs into. This is the point at which your amp will connect to the cab, after all!

You'd think, ay! but i tried that just now, got a reading of 1 Ohm.

philbinator1 · February 26, 2010, 06:05:44 PM

just bumping this for a quick reply, before the gig tonight

KV200 · April 17, 2010, 08:47:29 PM

Is it really loaded with Celestion Vintage 30's? The Spec Sheet says "Vintage 30MF". I'm thinking about buying one but would you have a photo of the "V30MF" speaker? (or is it just "Vintage 30"?)
Cheers

philbinator1 · April 18, 2010, 06:10:45 AM

Quote from: KV200 on April 17, 2010, 08:47:29 PM
Is it really loaded with Celestion Vintage 30's? The Spec Sheet says "Vintage 30MF". I'm thinking about buying one but would you have a photo of the "V30MF" speaker? (or is it just "Vintage 30"?)
Cheers

I'm pretty sure its a special V30 they made for the Mode 4 line. I've been using the MF280 with my Peavey Triple XXX
and it sounds great! Very big and heavy though, bigger than a regular 1960 Lead. Check out the specs:

http://www.marshallamps.com/downloads/files/MF%20Cab%20hbk.pdf

Hope that helps

KV200 · April 18, 2010, 08:30:18 AM

Does it have a regular Celestion Vintage 30 Sticker?

philbinator1 · April 18, 2010, 08:42:24 AM

Sure does. "Vintage 30MF" or similar, from memory. And judging by your username, it'll suit your style quite well.

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Different readings with switchable Marshall MF280 cab...please help?