amp cutting out

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=33221
Printed Date: May 10, 2025 at 4:54 AM

Topic: amp cutting out

Posted By: SPS70129
Subject: amp cutting out
Date Posted: June 03, 2004 at 10:03 AM

i have a kenwood 600 watt amp and i had two 8 ohm punch 12's. i changed out the punch 12s(blew them) and put in 2 kenwood 4ohms 12 now the amp is cutting out. i have them running parallel, also the amp is brighed, now i know that this is an ohms problem, but whats the problem?

thanks

Replies:

Posted By: DYohn
Date Posted: June 03, 2004 at 11:37 AM

You have placed too low an impedence load on teh amp. Two 4-ohm subs in parallel results in a 2-ohm load on teh amp, and your amp probably requires no lower than a 4-ohm load (although it would be nice to know the model number to determine this.) If the amp is stereo, either hook one sub to each channel (un-bridge it) or conenct the subs in series for a total load of 8-ohms on the bridged amp.

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Posted By: SPS70129
Date Posted: June 03, 2004 at 3:49 PM

the amp is a kac-829 it says that it's 2 ohm stable

Posted By: DYohn
Date Posted: June 03, 2004 at 3:55 PM

It is 2-ohm stable in stereo. It is 4-ohm stable if bridged. This is normal for Kanwood (and most other mid-level manufacturers.) So, if you have connected your subs in parallel to this amp, you are overloading it.

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Posted By: SPS70129
Date Posted: June 03, 2004 at 4:26 PM

how do you run them in stereo at 2ohms, also is it cutting out b/c it getting hot are is it the electronics?

thanks

Posted By: kevinbo5
Date Posted: June 03, 2004 at 4:45 PM

Each channel is 2Ohm stable. i.e. you can "present" a 2ohm load to each channel on the amp. But if you bridge the two channels (Left ch. + and right ch. -) it is only stable at 4Ohms.
Refer to DYon's post... "either hook one sub to each channel (un-bridge it) or conenct the subs in series for a total load of 8-ohms on the bridged amp."

Here:

posted_image

Posted By: DYohn
Date Posted: June 03, 2004 at 4:46 PM

With the speakers you have you cannot. Like I said earlier, your only choice is 4-ohm stereo (or 8-ohm mono.) It is because of the electronics.

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