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Topic: Speaker Wattage Mismatch in a Peavey Deuce--Need Advice |
Don Mogle
From:
Round Rock, TX, USA
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Posted 29 Feb 2020 12:51 pm |
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Hello and Thanks for You Time,
Can someone tell me if it would be OK (safe) to use an Eminence Cannibus Rex (50 watts) alongside an Eminence TT-12 (300 watts) in a Peavey Deuce (120 watts)(2 X 12) without possibly blowing the Cannibus Rex or driving it into distortion? Both speakers are 8 ohms.
Does this scenario raise any red flags for anyone more knowledgeable about these things?
Thanks,
Don |
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Paul Sutherland
From:
Placerville, California
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Posted 29 Feb 2020 1:08 pm
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What are the sensitivity ratings of the two speakers? That's the volume at a measured distance at a specified frequency produced by one watt on power. If the values are more than one or two db apart, one speaker will be noticeably louder than the other, which may or may not be a good thing.
The Peavey Duece is a tube amp, right? It will probably be unbearably loud well before you are putting it's full output to the speakers. So the Cannibus Rex will probably survive, unless you really crank the amp.
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It don't mean a thing if it ain't got that swing. |
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Brian Hollands
From:
Geneva, FL USA
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Posted 29 Feb 2020 1:16 pm
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Given the same impedance the speakers will each draw half the current, so 60 watts each. That said, practically speaking you won't get near full output at any reasonable club volume so you should be okay. But, that combination could easily blow the Rex if you crank it.
I'm assuming these are to be wired parallel for a 4 ohm load, correct?
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'81 Sho-bud LDG, 2 EMCI's |
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Paul Sutherland
From:
Placerville, California
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Posted 29 Feb 2020 1:42 pm
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Answering my own question: The Cannibus Rex sensitivity rating is 101.8 db, and the TT-12 sensiivity rating is 100.2 db. So the Cannibus Rex will be 1.6 db louder at one watt. It should be somewhat louder at all playing volumes, which I would think would be noticeable.
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It don't mean a thing if it ain't got that swing. |
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 29 Feb 2020 2:01 pm
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| Paul Sutherland wrote: |
| Answering my own question: The Cannibus Rex sensitivity rating is 101.8 db, and the TT-12 sensiivity rating is 100.2 db. So the Cannibus Rex will be 1.6 db louder at one watt. It should be somewhat louder at all playing volumes, which I would think would be noticeable. |
No, that's not enough difference to be significant, and you may not even notice it when they're side by side. Also, be advised that a speaker's sensitivity (efficiency) isn't linear, meaning that one particular speaker may not sound identically loud as another at different frequencies, even though their efficiencies are similar. Efficiency is only measured at one frequency, so to compare them properly, you need to know the response curves of each, which tells you the efficiency across the entire spectrum of frequencies. |
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Stephen Cowell
From:
Round Rock, Texas, USA
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Posted 29 Feb 2020 2:43 pm
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Better take into account the ohms of each speaker... I'm guessing the TT is 4ohms and the Rex is 8... so the TT will hog 2/3 of the power (good!) and your resultant impedance will be 5.33ohms in parallel (use a 4ohm output). If they're both the same impedance then watch out for blowing the Rex.... and try to match the output of the Deuce if you can.
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Too much junk to list... always getting more. |
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Don Mogle
From:
Round Rock, TX, USA
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Posted 29 Feb 2020 7:45 pm Mismatch
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My Deuce is all solid state. not the hybrid.
The TT-12 is 8 ohms. Both are 8 ohms.
They will be wired in parallel. There are two speaker jacks, so I think these are parallel. The internal speakers plug into one of the Jacks. My guess is the two speakers in it now (CTS 12s) are in parallel for a 4-ohm load.
The Rex starts going loud and strong between 1.8K and 3K...wildly loud! The TT-12 starts to drop significantly above 2.5Hz. The frequency response curve appears to be similar. Will try to post the response curves later.
I mostly will be playing it in my music room in the house. My wife goes crazy if I turn the volume past "1" on the volume control. However, it could see some play time at church.
Thanks for all the responses...gotta love this Forum!
One more thing, Mr Tone Tubby says hemp cones love more power!
Don
Last edited by Don Mogle on 2 Mar 2020 10:14 am; edited 1 time in total |
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ajm
From:
Los Angeles
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Posted 1 Mar 2020 9:40 am
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Don: What is the power rating of your Deuce, and into what impedance?
It may have been mentioned already, if so I missed it. |
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Don Mogle
From:
Round Rock, TX, USA
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Posted 1 Mar 2020 11:10 am
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| Deuce is 120 watts into 4 and 2 ohms...90 watts into 8 ohms. |
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