Connecting speakers to Model 4211 Combo
0

votes

Hi,

Question about connecting a Model 1982B 4x12 lead cabinet to my Model 4211 JCM800 100 watt lead combo.

I just want to be sure on the ohms before connecting the 1982B. Both have been in storage for over 30 years. I have already tested the 4211 combo and it is working fine, It has 2 x G12T-75's connected to one of the two speaker jacks in parallel, with the ohm dial set to 8 omhs. The Model 1982B lead 4x12 cabinet has 320W RMS and 8 omhs marked on the plate. So the questions are...

1. With the 2x16 ohm combo speakers in parallel the amp should be set to 8 ohms on the dial, correct?

2. If I disconnect the 2 combo speakers and only plug in the 4x12 cabinet, the amp stays at 8 ohms?

3. If I connect bothe cabinets, combo at 8 ohms and 4x12 at 8 ohms, should the amp be set to 4 ohms?

Sorry if this sounds like a dumb question, but both these things have survived over 30 years in storage, and the last thing I want to do is screw them up by being an idiot and connecting them wrong and frying them.

Thanks for any help in advance...

Les

 

asked 19 Apr 2017 at 08:51 PM

Les Turner
Answers: 1
0

votes

Hello Les,

Regarding your questions-

1- This is correct

2- This is correct

3- When using the internal 8ohms and the external 8ohms load you do put the impedence selector to 4 ohms. Remebering to switch it back to 8ohms when using the amplifier by itself. 

answered 25 Apr 2017 at 07:43 AM

Marshall
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