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Unread 05-04-2008, 12:39 PM   #1 (permalink)
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Wiring 4 8ohm speakers at 16 ohms

Is it possible to take 4, 200 watt EVM 12L's (which are all rated at 8ohms) and wire them in a 4x12 cab so that the total load is 16 ohms? Any info much appreciated...
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Unread 05-04-2008, 01:53 PM   #2 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

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Originally Posted by abbiehuxley View Post
Is it possible to take 4, 200 watt EVM 12L's (which are all rated at 8ohms) and wire them in a 4x12 cab so that the total load is 16 ohms? Any info much appreciated...
No way, no how.

Choices are:

all 4 in parallel = 2 ohms
series/parallel pairs = 8 ohms
all 4 in series = 32 ohms
3 in parallel, in series with the 4th = 10.66 ohms
3 in series, in parallel with the 4th = 6 ohms

To get 16, you'll have to either add speakers, remove speakers, or get 4 16 ohm speakers.

Another option is to get a HotPlate and use it as a dummy speaker load in series with your 8 ohm cab, but you'd be better off just getting more, or less, or different speakers.
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Unread 05-05-2008, 09:18 AM   #3 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

Why do you want to increase the ohms?
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Unread 05-05-2008, 03:00 PM   #4 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

I just think amps sound better running at 16 ohms so I was hoping I could find a way to run the cab at 16 ohms. Guess not...
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Unread 05-05-2008, 03:30 PM   #5 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

I guess we are the opposite. I rewired mine FROM 16 to 4 Ohms. I think the lower resistance allows more power into the speaker so it sounded better to me.
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Unread 05-05-2008, 03:37 PM   #6 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

A long time ago, I tried comparing running at 4 and 16 to see any difference. I didn't hear any. It's certainly not worth doing what you would have to do.
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Unread 05-05-2008, 03:58 PM   #7 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

I may change mine back to see if the difference I heard was due to speaker wire upgrade, or ohm droppage. It's not like it's difficult to do! I just have to desolder all of my connections, but once the iron is hot, that takes a few seconds per connection.
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Unread 05-05-2008, 04:01 PM   #8 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

Ok... so a 4x12 cabinet with 4, 8ohm EVM 12L's would have to be in series/parallel pairs to run at 8 ohms? Man, I'm terrible at this... Thanks!
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Unread 05-05-2008, 04:06 PM   #9 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

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Ok... so a 4x12 cabinet with 4, 8ohm EVM 12L's would have to be in series/parallel pairs to run at 8 ohms? Man, I'm terrible at this... Thanks!
Correct.

Just checking....Do you know what "series/parallel pairs" means?
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Unread 05-05-2008, 04:16 PM   #10 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

Yes, it would have to be in series/parallel. What that basically means is that your left and right set of speakers are wired together in parallel. That means that if you have 8 ohms speakers, the left and right speakers are wired to 4 ohms, then the two sides are joined (series) and you add up both sides to get the total. So your 8 ohms comes from wiring up 2 SETS of speakers wired to 4 ohms. In other words, you could get a jack plate for the back and do a ton of different configurations. You could have a 2 ohm in put, a 8 ohm input and 2 stereo 4 ohm inputs, however hardly any amps have 2 ohm outputs, so that would make that input worthless. But you could use the others!
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Unread 05-06-2008, 12:22 AM   #11 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

Speaker Impedance Calculator here:===> Speaker impedance
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Unread 05-18-2009, 12:02 PM   #12 (permalink)
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Re: Wiring 4 8ohm speakers at 16 ohms

Need a the definite ramifications. 50 watt tube wired into two 8 ohm Celestions in a parallel circuit bringing it down to 4 ohms per speaker and 25 watts per speaker. Good or bad? Then single speaker MG50DFX 8 ohms connected to the two eight ohm speakers. Adviseable?
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