Hello folks,

I'm buying a kenwood kac-7203, but everywhere i look, it says it's stable bridged into 4ohms at 500w. I only need 300w (rms), but for a single 12w6 - a 3ohm load (2x6ohm coils).

Will it be safe to use this kenwood with said subwoofer? The amp is stable into 2 ohms, but not bridged - 250w x 2 at 2 ohms.

I don't want to kill either, as i won't be affording a replacement for a while

Please educate!

 

Oh come on fellas this isn't uni calculus...

 

yes but you should use each channel to power each VC separately so the amp will see 3ohms per channel (around 210w per cham @ 3ohms) and this way the amp wont go into protect...

This amp not the perfect fit for this sub, why this model?

 

Bought the sub for $50, buying the amp for $80. Both are used of course.

 

ok then, like i said power each VC with one channel and you should be fine.

 

Is there any deviation in the output of the 2 channels? I mean there's a left and a right input, if 2 different signals go into one woofer... it'll rip the motor assembly apart, won't it? Even if the input is mono, wouldn't there be small ripples on the output amounting to ~0.5% differences? I mean, that's the THD rating...

Thanks anyhow!

 

if you use 2 amps yes it's possible but the 2 channels should be correctly balanced (for bridge operation it need to).

 

Ah, yes... otherwise one would provide a load for the other! You're right, thanks!
Great then... i guess ill take it.

 

This is simply incorrect.
The Sub is a dual 6 not dual 3.
He would give each channel a 6 ohm load.
Really that sub is designed to be run at a trio. Get three of them together to get either a 4 ohm final or a 1 ohm final.

Also, don't run either coil off of a different channel.
L and R rarely are perfectly matched for output which means that when the outputs are NOT matched the voice coils will fight each other, diminish out-put and shorten the longevity of the sub.

What you need is a Mono Amp 2 ohm stable running at 3ohms.
That stereo amp is not a good fit.
Don't do it!

 

Weird, my understanding was that when you bridge the amp, one channel take care of the + sinewav and the other one the -. Now if it's not perfectly balanced the output signalwhen briged will not be good... no?

Also to make sure that the signal at the input is equal on both side he could use a Y adapter to split on of the sub out to the 2 input of the amp.

I could be totally wrong but that is how i would have done it. We are talking about a 130$ setup here.