| Impedance question...again [message #1369] |
Wed, 20 March 2002 16:45  |
Siggy
Messages: 12
Registered: March 2002
Location: Columbus, Ohio
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When I cracked the cabinet on my J495,
I was surprised to see that the JBL D-130's were 16 ohm. I was under the impression that this was a 4 ohm cabinet, but from what I gather it's an 8 ohm?
Siggy
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| Re: Impedance question...again [message #1374 is a reply to message #1371] |
Thu, 21 March 2002 08:27  |
Siggy
Messages: 12
Registered: March 2002
Location: Columbus, Ohio
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Junior Member |
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I think so…
Series is when the leads from one speaker connect to the second speaker and the second speaker connects to the jack?
Parallel is when the leads from both speakers are connected to the jack , in my case via a y splice.
From what I understand though, doesn’t parallel wiring require more power to create the same volume? Effectively reducing your output?
IE: 100w rms @ 4ohm vs. 50~w rms @ 8ohm
If so, why is my Kustom SO DAMN LOUD!?!?
Inquiring minds,
Siggy
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| Re: Impedance question...again [message #1387 is a reply to message #1374] |
Thu, 21 March 2002 22:43 |
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Siggy, parallel dosen't require any more power than would speakers in series. The key thing here is to match your total speakers to your amp. If the amp produces 100w rms at a 4 ohm load, the amp dosen't care if it one 4 ohm speaker or four 16 ohms wired in paralled. Example would be a 4x12 cabinet loaded with 8 ohm speakers. two will be wired in series to get 16 ohms, the other pair will be wired in series again to get 16 ohms, the two pairs will be wired in parallel to get a 8 ohm load. Isn't this fun? you could wire the same four 8 ohm speakers in a parallel/parallel into series and get the same results of a 8 ohm total load. The kustoms amps work best at 4 ohm to produce the 100 watts. Kustom offered their 2x12 4x12 2x15 cabinets in a 8 ohm load per cabinet, that way you could always add another cabinet to bring it to the 4 ohm load for the max output. Hope this helps out, and we could talk all day on ther merits of what ohm is best. It still boils down to the amp selected to drive the speaker/s. Don
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| Re: Impedance question...again [message #1421 is a reply to message #1369] |
Sat, 13 April 2002 23:14 |
KomboKing
Messages: 44
Registered: June 2001
Location: Northern Kentucy
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OK...Pleat knows the answer I'm sure...
The Komboking scores again! I just aquired a fine charcoal K-25...I believe it has the original Jensen....what does a yellow dot mean?
And while we're on the subject.....how were the 4X10's wired?
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| Re: Impedance question...again [message #1424 is a reply to message #1421] |
Sun, 14 April 2002 10:27 |
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The yellow dot is the + marker for wiring the speaker. The impedance should be 16 ohms. I have had some with 8 ohms, but in what we have been able to find in the kustom manuals, 16 ohm is the correct impedance. The 4x10 100's were wired in series/parallel and used 8 ohm speakers to produce a 8 ohm load to the amp. Same wiring arrangement and speaker impedance that the 4x8, 4x10, and the 4x12 columns used. The k25 and k50 are still my favorite amps. Add a line out jack and grounded AC mains cable, and rock on. Don
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