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How to wire Speakers for 4 Ohms?

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Old 04-08-2008, 03:05 PM
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Default How to wire Speakers for 4 Ohms?

My Amp can do 1 Channel at 230 Watts at 4 Ohms. I have 3 Subs, Dual Voice Coil 4 Ohms. How can i wire these to end up at 4 Ohms?

I can run other configurations too if needed... It just wont be a balanced setup (2 on 1 channel, 1 on 2nd channel)
Old 04-08-2008, 03:41 PM
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Default Re: How to wire Speakers for 4 Ohms? (I Want An Si)

Make and model of amp?

You can't get a 4 ohm load wit 3 DVC 4 ohm subs, you can get 6 ohms, [parallel/series] or 2.66 ohms, [series/parallel], go with two subs and wire them series/parallel, VCs in series for an 8 ohm load then the subs in parallel to bring it back down to 4 ohms.

The other option is to find an amp that is stable at 2 ohms and wire the VCs in series then the 3 subs in parallel.

Definitely need make and model of subs, 230W is low for 3 DVC subs. 94
Old 04-08-2008, 03:57 PM
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Default Re: How to wire Speakers for 4 Ohms? (fcm)

Yeah... was just thinking that.. the RMS of the Subs is 200...

The subs are Infinity Reference 1052W, the amp is an older model sony... XM-404EQX... its an amp I have so i was trying to use it...

Was thinking of going with the Kenwood Excelon KAC-X10D (300 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms) )

Im confused though... how many watts would i get if im running at 2.66 Ohms
Old 04-09-2008, 01:59 AM
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Default Re: How to wire Speakers for 4 Ohms? (I Want An Si)

Well with the sony it wont push 3 subs and survive a week, maybe not even 2. The kenwood would do great with 2 subs and still very good with 3. Might need a capacitor though. All wiring options are right here:
http://www.crutchfield.com/S-W....html
Old 04-09-2008, 04:22 AM
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Default Re: How to wire Speakers for 4 Ohms? (I Want An Si)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I Want An Si &raquo;</TD></TR><TR><TD CLASS="quote">Yeah... was just thinking that.. the RMS of the Subs is 200... </TD></TR></TABLE>

Then you should only be running one of those subs...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I Want An Si &raquo;</TD></TR><TR><TD CLASS="quote">Im confused though... how many watts would i get if im running at 2.66 Ohms</TD></TR></TABLE>

You amp is not stable below 4 ohms so you should not run a 2.66 ohm load.
Old 04-09-2008, 05:49 AM
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Default Re: How to wire Speakers for 4 Ohms? (White Smoke)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">

Then you should only be running one of those subs...


You amp is not stable below 4 ohms so you should not run a 2.66 ohm load. </TD></TR></TABLE>

Im talking if I run the other amp mentioned
Old 04-09-2008, 06:01 AM
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Default Re: How to wire Speakers for 4 Ohms? (I Want An Si)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I Want An Si &raquo;</TD></TR><TR><TD CLASS="quote">Yeah... was just thinking that.. the RMS of the Subs is 200...

The subs are Infinity Reference 1052W, the amp is an older model sony... XM-404EQX... its an amp I have so i was trying to use it..</TD></TR></TABLE> Actually the subs are 250W continuous, you will need to fins an amp that makes 750W + RMS into a 2 ohm load, I would look for a 1x1000W into 2 ohms amp if you want to drive all 3 subs properly. 94
Old 04-09-2008, 06:27 AM
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Default Re: How to wire Speakers for 4 Ohms? (fcm)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote"> Actually the subs are 250W continuous, you will need to fins an amp that makes 750W + RMS into a 2 ohm load, I would look for a 1x1000W into 2 ohms amp if you want to drive all 3 subs properly. 94</TD></TR></TABLE>

Thanks for the help!!

Would the Kenwood KAC-9104D do?

Maximum Power Output
• 1800W
Rated Power Output (14.4V )
• 500W x 1 at 4ohms (20-200Hz 0.5% THD)
• 900W x 1 at 2ohms (100Hz 0.8% THD)
• Over 900W at 1ohm

Also the 1052W Reference speakers arent set in stone yet.... I can just get a good deal on them... ill be running them in a JL Stealth Vantage box in an integra.... let me know if this is a good config or not....

Old 04-09-2008, 10:54 AM
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Default Re: How to wire Speakers for 4 Ohms? (I Want An Si)

The Kenwood amp will do the job, it should make around 800W into 2.66 ohms.

What size, [gross cuft of volume inside of box] is the JL box and is it a sealed box?

The 3 Infinity subs need .75cuft gross each, [2.25cuft gross total] in a sealed box.

It is importent that box volume is correct... http://manuals.harman.com/INF/...W.pdf 94
Old 04-09-2008, 11:57 AM
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Default Re: How to wire Speakers for 4 Ohms? (fcm)

I havent found any solid spec sheets for them online... but someone said its 1.75
Old 04-09-2008, 02:53 PM
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Default Re: How to wire Speakers for 4 Ohms? (I Want An Si)

That would make it too small for the Infinity subs. 94
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