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Old 05-04-2008, 01:39 PM   #1
abbiehuxley
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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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Old 05-04-2008, 02:53 PM   #2
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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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Old 05-05-2008, 10:18 AM   #3
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Re: Wiring 4 8ohm speakers at 16 ohms

Why do you want to increase the ohms?
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Old 05-05-2008, 04:00 PM   #4
abbiehuxley
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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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Old 05-05-2008, 04:30 PM   #5
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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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Old 05-05-2008, 04:37 PM   #6
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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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Old 05-05-2008, 04:58 PM   #7
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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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Old 05-05-2008, 05:01 PM   #8
abbiehuxley
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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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Old 05-05-2008, 05:06 PM   #9
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Re: Wiring 4 8ohm speakers at 16 ohms

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Originally Posted by abbiehuxley View Post
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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Old 05-05-2008, 05:16 PM   #10
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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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Old 05-06-2008, 01:22 AM   #11
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Re: Wiring 4 8ohm speakers at 16 ohms

Speaker Impedance Calculator here:===> Speaker impedance
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Old 05-18-2009, 01:02 PM   #12
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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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Old 10-21-2015, 12:50 AM   #13
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Re: Wiring 4 8ohm speakers at 16 ohms

here is a video on how to do it, so i guess it can be done..
I have a cab with 4 - 8 ohm speakers run in parallel / series, and for some reason the output jack is reading 13 ohms.. go figure.

https://www.youtube.com/watch?v=kQ6_uYAb_CM

This is how mine is wired up.

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Old 10-21-2015, 07:37 AM   #14
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Re: Wiring 4 8ohm speakers at 16 ohms

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Originally Posted by ZoomZilla View Post
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.
No it does not allow more power, but it might sound differently.

16 ohm speaker, amp set 16...
is same exact power as
4 ohm speaker, amp set on 4 ohms.

no power increase.


4X EVM wired 8 ohms, amp set 8 ohms, will be just fine.
again, the same power as
16 ohm speaker, amp set 16 ohms.

EVM speaker sounds quite nice! My favorite speakers.
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Old 10-21-2015, 08:19 AM   #15
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Re: Wiring 4 8ohm speakers at 16 ohms

Quote:
Originally Posted by Slimjim View Post
here is a video on how to do it, so i guess it can be done..
I have a cab with 4 - 8 ohm speakers run in parallel / series, and for some reason the output jack is reading 13 ohms.. go figure.

https://www.youtube.com/watch?v=kQ6_uYAb_CM

This is how mine is wired up.

13-14 would be a normal reading for four 16 ohm speakers wired series / parallel...my guess would be your speakers are 16 ohms. Disconnect one and check across the terminals.
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Old 10-21-2015, 10:10 AM   #16
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Re: Wiring 4 8ohm speakers at 16 ohms

I concur completely with Tony....gotta be 16 ohm speakers...Ohm's law don't lie
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