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Old 06-16-2003, 10:19 PM   #1
TDing525i
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I need help with wiring subs to an amp

My friend's got a mono channel amp that he's pairing up with two 4-ohm single voice coil subs. Can I wire them to 2-ohms or does it have to be 4-ohms? Whichever one it is, could someone please draw a rough sketch of what the wiring would look like using Paint or something?


Here's the type of sketch I'm talkin about. I am almost positive that that's what it looks like. The only thing I can't remember for sure is if the amp has 1 or 2 sets of +/-. I would assume that since it's a mono that there's only one??
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Old 06-17-2003, 10:57 AM   #2
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It all depends on what amp you have. It's stable at a 2ohm load and your subs are DVC then I'd go with the 2ohm load. (Usually subs and amps run higher RMS at 2ohms) If not, the you can hook the mono amp with the two 4ohm subs...It just wont hit as hard.
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Old 06-17-2003, 11:19 AM   #3
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Like Temonio said, if the amp is 2-ohm stable then wire the subs in parallel. Otherwise, you'd have to go series to use both.

Series

Like batteries in a flashlight. Connect a wire from amp + speaker + and another wire from amp - to the other speaker -. Then connect the two speakers using the unused + and - with a wire.

Parallel

Use two sets of wires. Go from amp + to speaker 1 + and amp + to speaker 2 + with a different wire. Do the same with the negative.

If those are DVC subs, then things can get a little trickier.
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Old 06-17-2003, 12:41 PM   #4
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Note that if you wire in series, you'll have a total resistance of 8 Ohms.
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Old 06-17-2003, 01:18 PM   #5
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they are not dual voice coil. i'd like to be able to wire it to 2 ohms. subs are each 10" visonik 250W, 500W peak. amp is a bazooka el1500 500Wx1.

Could someone please take my little sketch and just draw in the wiring sceme?
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Old 06-17-2003, 02:33 PM   #6
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Edit: I just need a little more clarification with the parallel wiring. I'm getting confused because the amp has only one + and one -
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Old 06-17-2003, 02:44 PM   #7
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Is this how you do it? If so, what do I use to connect the wires of the speakers together?
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Old 06-17-2003, 02:59 PM   #8
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Your diagram is mostly right. Just twist the ends of your two positive wires together and plug those into the positive terminal of your amp. Do the same for the negative.

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Old 06-17-2003, 03:40 PM   #9
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Gotchya. Thanks a lot!
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Old 06-17-2003, 11:30 PM   #10
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what are the disadvantage and advantage of series vs parallel?
i'm trying to understand this by heart.
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Old 06-20-2003, 11:57 AM   #11
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Series has more resistance so you get less current and power. This will keep your amp cool. However, parallel will give you more power, a lot more. 2 ohm to 8 ohm is a big difference. Read up on Ohm's Law and all that good stuff.
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Old 06-20-2003, 01:16 PM   #12
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Quote:
Originally posted by Temonio
It all depends on what amp you have. It's stable at a 2ohm load and your subs are DVC then I'd go with the 2ohm load. (Usually subs and amps run higher RMS at 2ohms) If not, the you can hook the mono amp with the two 4ohm subs...It just wont hit as hard.
You can't get a 2ohm load from two 4ohm DVCs. If they're SVCs then you'e set. Most amps can handle a 2 ohm load.



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Old 06-20-2003, 02:51 PM   #13
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I checked and it'll handle 2 ohm fine, so wire them in parallel. If that amp is overrated, then you might actually want a better one since the speakers can handle 250 RMS.

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Old 06-20-2003, 05:48 PM   #14
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Quote:
Originally posted by SrCsTc


You can't get a 2ohm load from two 4ohm DVCs.


Correct.


I wired them in parallel and they work great.
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Old 06-20-2003, 05:55 PM   #15
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There's a good Tutorial here on Wiring your subs
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Old 06-23-2003, 08:08 AM   #16
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Quote:
Originally posted by Temonio
It all depends on what amp you have. It's stable at a 2ohm load and your subs are DVC then I'd go with the 2ohm load. (Usually subs and amps run higher RMS at 2ohms) If not, the you can hook the mono amp with the two 4ohm subs...It just wont hit as hard.

I reread my post and confused my own damn self! Good Catch fellas!
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Old 06-23-2003, 11:42 AM   #17
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Quote:
Originally posted by millst
Series has more resistance so you get less current and power. This will keep your amp cool. However, parallel will give you more power, a lot more. 2 ohm to 8 ohm is a big difference. Read up on Ohm's Law and all that good stuff.
first off, thank you for responding to my questions. i'm cleared now, but not sure about how you come up with 2 and 8 ohms.

so, PARALLEL for 1 channel amp, 4 ohms single voice coil sub would be R(t) = 1/R(1) + 1/R(2) = 2 ohms (4 ohms divided by 2 speakers).

and, SERIES for 1 channel amp, 4 ohms single voice coil sub would be R(t) = R(1) + R(2) = 2 ohms. i know how you get 8 ohms. that's by adding 4 ohms + 4 ohms = 8 ohms. i thought this is only true when you have dual voice coils on each sub? maybe my formula is wrong? i m confused. please educate me. thanks.

R = Resistance of one voice coil
R(1) = Resistance of the first single voice coil, R(2) = ...2nd, etc.
R(t) = total Resistance
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