Couldn't find any information on the VS-412
Vintage Marshall VS-412 Cabinet How Many Ohms???
- Thread starter Inspector #20
- Start date
chilipeppermaniac
Ambassador of Decibels
This is what I came up with. Saw it on Reverb Marshall VS412 4X12 Cabinet | Reverb
Used: This cabinet is in good condition, with some typical tolex and grille cloth wear. All speakers are fully-functional, and sound great!
Speakers: (4) Celestion G12L35 35W, 96db.
Total Power Handling: 140W
Impedance: 8ohm
Construction: MDF (Particle Board)
Used: This cabinet is in good condition, with some typical tolex and grille cloth wear. All speakers are fully-functional, and sound great!
Speakers: (4) Celestion G12L35 35W, 96db.
Total Power Handling: 140W
Impedance: 8ohm
Construction: MDF (Particle Board)
OP
You may want to bring a meter with you to verify impedance, using the tip and sleeve of a known good speaker cable that is plugged into the unknown speaker cabinet. Just because the internet says it is 8 Ω, doesn’t mean that it hasn’t been altered.
SG John
Ambassador of Cool Guitars and Amps.
We both care for our tube ampsWe hit reply at almost the same moment.
and know the perils of strange cab’s.
chilipeppermaniac
Ambassador of Decibels
This for sure Bastarddon
I like this idea very much!
OP
It measured 9.2ohms
Jethro Rocker
Ambassador of Live & Loud Action
You are measuring resistance not impedance. So Should be 16 ohm then but that is a bit low a reading for 16.. Usually measures around 12. Perhaps they are the old 15 ohm drivers. Set er to 16 and rock. Cab should be an 8 ohm though if stock.
Or open up back and check each driver. Make sure they all work.
Really not that drastic.
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Jethro Rocker
Ambassador of Live & Loud Action
I should add. 16 ohm load is fine on 8 ohm jack from amp.
OP
It's just a cab at our rehearsal space that I was invited to use.
It has a single jack with no switches.
It has a single jack with no switches.
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Jethro Rocker
Ambassador of Live & Loud Action
That 9.2 should indicate about 16 ohms. Stock cab is 8 but measured resistance of a speaker will be LOWER than impedance which would indicate 16 ohm. Which means drivers were changed.
OP
I just plugged it into the 8 ohm jack an we played about 4 hours
OP
@Jethro Rocker
Just to clarify this...
The VS412 has a single 1/4" jack and it is a closed back cabinet. It was not possible to take readings at the individual speakers.
My 9.2 ohms reading was taken by plugging in a single speaker cable and taking a reading across the contacts with my Snap-On DVOM.
Jethro Rocker
Ambassador of Live & Loud Action
Right yes. I knew that part. Total cab resistance. Did not realize you had no access to the drivers themselves. That would make it a 16 ohm cab which is not stock.
OP
A 16 ohm cabinet with 9.2 ohms total resistance at 78°F???
Jethro Rocker
Ambassador of Live & Loud Action
Well it isn't 8 ohm. That would measure well below 8. Can't set it at 12. So 16 it is. If in doubt, set amp at 8 if using a tube amp totally safe for an over 8 ohm load. If SS it makes no diff, no kmpedance setting.