amp cutting out

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Sps70129

Copper - Posts: 55

Joined: September 26, 2003

Location: United States

Posted: June 03, 2004 at 10:03 AM / IP Logged

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

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: June 03, 2004 at 11:37 AM / IP Logged

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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Sps70129

Copper - Posts: 55

Joined: September 26, 2003

Location: United States

Posted: June 03, 2004 at 3:49 PM / IP Logged

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

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DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: June 03, 2004 at 3:55 PM / IP Logged

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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Sps70129

Copper - Posts: 55

Joined: September 26, 2003

Location: United States

Posted: June 03, 2004 at 4:26 PM / IP Logged

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

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kevinbo5

Member - Posts: 37

Joined: April 13, 2004

Location: United States

Posted: June 03, 2004 at 4:45 PM / IP Logged

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:

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DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: June 03, 2004 at 4:46 PM / IP Logged

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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amp cutting out

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