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4 ohm + 4 ohm = 4 ohm?


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frans-c 
Copper - Posts: 77
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Joined: February 14, 2006
Location: South Africa
Posted: March 25, 2006 at 1:00 PM / IP Logged  
Is there any way of wiring two 4 ohm SVC subs to give a total impedence of 4 ohms?
From what I can tell from what I've read so far, the higher the impedence of the subs, the better sound quality you'll get from them.
I'm currently upgrading my car's audio, purchased a Kenwood KAC-8152D 1100W (300W RMS @ 4 ohms, 550W RMS @ 2 ohms) mono-amp, hooked up to two KFC-W3009 800W (200W RMS) 12" SVC subs (haven't done the installation yet).
I want tight, natural bass, so I built my own dual sealed sub-enclosure from 22 mm (a little less than an inch) MDF with double bracing separating the two 1 ft³ chambers as well as a double layer for the front (the thing weighs a ton!). The box is completely air-tight, 100% sure of it. I realise now that I should've rather purchased two 2 ohm subs and connected them in series for a 4 ohm load. Will there be a significant difference in sound quality when playing one sub at 4 ohms, versus the two subs wired in parallel at 2 ohms? My car's trunk is sealed rather tight, so the bass struggles to fill the cabin, hence the reason for two subs.
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the12volt 
Administrator - Posts: 3,955
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Joined: March 07, 2002
Location: Louisiana, United States
Posted: March 25, 2006 at 1:03 PM / IP Logged  
No. You can wire them to get a net impedance of 2 ohms or 8 ohms, but not 4 ohms.
4 ohm + 4 ohm = 4 ohm? -- posted image. the12volt • Support the12volt.com
boardinbum 
Silver - Posts: 358
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Joined: February 07, 2005
Location: United States
Posted: March 25, 2006 at 1:41 PM / IP Logged  
Just wire them for 2 ohms. I highly doubt you would be able to tell the difference between 4 and 2 ohms other than both wired at 2 will be ~3db louder.
forbidden 
Platinum - Posts: 5,352
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Joined: November 01, 2003
Location: Alberta, Canada
Posted: March 25, 2006 at 3:44 PM / IP Logged  
I too would wire them in parallel to have the amp produce the best it can for the subs you have.
Top Secret, I can tell you but then my wife will kill me.

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