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Topic: Speaker Wiring |
Mitch Druckman
From:
Arizona, USA
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Posted 21 Dec 2008 7:00 pm |
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I have 2- 8ohm 12" speakers. I want to mount them together in an extension cabinet, but a 4 ohm cabinet will not work for me.
How can I wire them to end up with an 8 ohm cabinet? |
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Bob Tuttle
From:
Republic, MO 65738
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Posted 21 Dec 2008 7:18 pm
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| If you wire them in parallel, you'll have a 4 ohm load. If you wire them in series, you'll have 16 ohms. I don't know of any other way to wire them. Maybe you could trade them for two 16 ohm speakers and hook them in parallel for an 8 ohm cabinet. |
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Mitch Druckman
From:
Arizona, USA
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Posted 21 Dec 2008 8:18 pm
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| Isn't it possible to use a resistor or some type of load circuit to modify the speaker's impedance? |
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Mitch Druckman
From:
Arizona, USA
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Posted 22 Dec 2008 3:49 pm
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| Have I stumped the band? |
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Pit Lenz
From:
Cologne, Germany
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Posted 22 Dec 2008 4:46 pm
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Mitch,
Bob is completely right, but
theoretically you could wire the two 8-ohm speakers in series (one behind the other) to get a 16-Ohm combination, then hook up another 16-Ohm Resistor (watch the wattage) parallel to that and you´ll end up with a 8-Ohm cabinet.
But this makes no sense, since the parallel dummy resistor will eat up half of the amp´s power to produce nothing but heat, only the other half will actually drive your speakers.
So, in the end you´ll be better off with a 16-Ohm cabinet (no resistor hassle and risk), ´cause it´ll deliver just the same power to the speakers....
What´s the problem with a 4.Ohm cab?
Are there already other speakers hooked up or is it a tube amp? |
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Mitch Druckman
From:
Arizona, USA
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Posted 22 Dec 2008 5:16 pm
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| I want to connect a 2-12 extension cabinet to my deluxe reverb. The deluxe already has an 8 ohm speaker in it. I'm afraid if I connect a cabinet with less than 8 ohms to the extension jack on the amp, I'll damage the amp. I don't think a deluxe reverb can handle a load of less than 4 ohms total. Is this correct? |
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Pit Lenz
From:
Cologne, Germany
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Mitch Druckman
From:
Arizona, USA
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Posted 23 Dec 2008 7:25 am
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| Thank you to Pit and Bob for steering me in the right direction. It looks like wiring it for 16 ohms is the ticket. Happy Holidays to all. |
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James Morehead
From:
Prague, Oklahoma, USA - R.I.P.
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Posted 23 Dec 2008 8:01 am
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| Mitch, you can wire two 4 ohm speakers in "series" to end up with 8 ohms from your ext. cabinet, too. But if you already own the 8 ohmers, well---------- |
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 23 Dec 2008 7:31 pm
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| Since you're using a Deluxe Reverb (with only about 20 watts), you'd probably be better off just using one 12" extension speaker. If the cabinet holds two speakers, just unhook one of them. |
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