woofer impedence Question
03-03-2006, 05:28 PM
#12
50 Watt CAFz'r
Thread Starter
Join Date: Nov 2004
Posts: 351
i'm going to be running em off a clarion apx640.2
specs are
# Continuous Output Power . . . . . . . . . . . . . . 320 W (160 W x 2)
# 2-ohm Stereo Output (1kHz) . . . . . . . . . . . . . . . 298 W x 4
# 2-ohm Stereo Output (20Hz-20kHz) . . . . . . . . . . 252W x 2
# 4-ohm Stereo Output (1kHz) . . . . . . . . . . . . . . . 180 W x 2
# 4-ohm Stereo Output (20Hz-20kHz) . . . . . . . . . . 164 W x 2
# Bridged Output Power @ 4 ohm (1kHz) . . . . . . . .596 W x 1
# Bridged Output Power @ 4 ohm (20Hz-20kHz) . . .504 W x 1
specs are
# Continuous Output Power . . . . . . . . . . . . . . 320 W (160 W x 2)
# 2-ohm Stereo Output (1kHz) . . . . . . . . . . . . . . . 298 W x 4
# 2-ohm Stereo Output (20Hz-20kHz) . . . . . . . . . . 252W x 2
# 4-ohm Stereo Output (1kHz) . . . . . . . . . . . . . . . 180 W x 2
# 4-ohm Stereo Output (20Hz-20kHz) . . . . . . . . . . 164 W x 2
# Bridged Output Power @ 4 ohm (1kHz) . . . . . . . .596 W x 1
# Bridged Output Power @ 4 ohm (20Hz-20kHz) . . .504 W x 1
03-03-2006, 06:17 PM
#16
You can only present a 4 ohm stereo load with single 4 ohm subs. A series circuit would turn them into a 8 ohm load and connecting to the bridged outputs of the amp would yield 250 watts rms. Wiring them in a parallel circuit would yield a 1000w rms output and melt your amplifier as it was not designed for this application. So based on the specs that you posted, here is what you can do.
This is your way for maximum output with two single 4 ohm drivers. This is the only safe way.
# 4-ohm Stereo Output (20Hz-20kHz) . . . . . . . . . . 164 W x 2
This is my way with two dual 4 ohm drivers.
# Bridged Output Power @ 4 ohm (20Hz-20kHz) . . .504 W x 1
My way provides you with more output power. To answer your question though, "I could present a 4 ohm load to the amp by running 2 svc's could I not?", only if you buy two 2 ohm subs and wire them in series or two 8 ohm subs and wire them in parallel. These then would both be a 4 ohm bridged load and give the same amount of output as what I said to do. There are far more subs available that are dvc 4 ohm than there is single 2 ohm or single 8 ohm.
This is your way for maximum output with two single 4 ohm drivers. This is the only safe way.
# 4-ohm Stereo Output (20Hz-20kHz) . . . . . . . . . . 164 W x 2
This is my way with two dual 4 ohm drivers.
# Bridged Output Power @ 4 ohm (20Hz-20kHz) . . .504 W x 1
My way provides you with more output power. To answer your question though, "I could present a 4 ohm load to the amp by running 2 svc's could I not?", only if you buy two 2 ohm subs and wire them in series or two 8 ohm subs and wire them in parallel. These then would both be a 4 ohm bridged load and give the same amount of output as what I said to do. There are far more subs available that are dvc 4 ohm than there is single 2 ohm or single 8 ohm.
03-03-2006, 08:37 PM
#19
50 Watt CAFz'r
Thread Starter
Join Date: Nov 2004
Posts: 351
ok so how exactly does one go about wiring to 2 speakers with 1 wire? do I splice the wire or should I just run another small set of wire from the first sub to the second? also in the pic I noticed that its run from the + on the amp to the + on both subs.. as well as for the -'s.. but it looks like it's also showing the other + and - on each sub connected to eachother.. is that correct or are the other + and -'s on the 2 woofers left alone?
03-03-2006, 09:34 PM
#20
I usually run a wire from one sub to the other. It is correct in showing that there is a wire running from voice coil #1 - to voice coil#2 + on each subwoofer. This is called a series circuit and makes the sub a 8 ohm driver. When two similar drivers are wired this way, you now have two 8 ohm drivers. If you notice that the wire that connects the two subs together goes from a + on one to the + on the other, same with the - wires, this is called a parallel circuit and when wired together like this makes a 4 ohm load again.
