QuestionI have a Sony XM-GTR2022 2 channel amplifer pushing a Kicker comp DC12. The amp has a bridging feature that allows you to use two of the four connecters if your connecting to one thing. My sub says two ohms on the side and if you use the bridging feature it says min 4 ohms. Is this a problem?
AnswerHi Tyler,
Unfortunately, yes, it's a problem.
Like most 2-channel amps, your Sony amplifier is only stable with a 4-ohm load in bridged mode. If you connect it to a 2-ohm subwoofer system, you'll be overloading the amplifier. This could result in overheating, blown fuses, and excess distortion; or trigger the "protect" mode on the amplifier from too much current. In the worst case, you could damage the amp. Furthermore, the amplifier's bridged power output is much higher than the rated power capacity of the subwoofer system, so you'd run the risk of damaging the subs as well.
The Kicker DC12 system consists of two 12" Comp 4-ohm subs, wired in parallel for a combined 2-ohm load. It's really designed for a 2-ohm stable mono amplifier. If the Sony amp is your only option, your best bet is to install a second speaker terminal block on the Kicker sub box so that the two Comp subs can be wired separately. This would allow you to connect the two subs to the amplifier in 2-channel mode.
Even then, it's not an ideal match. The Sony amp is rated at over 200 watts RMS per channel, and the Comp subs are only rated for 150 watts each. You'll need to use extra caution when setting the amplifier's gains and using the system, or you'll risk damaging the subs from over-powering.
Kicker's ZX300.1 is an example of an amplifier that would be a perfect match for your subwoofer system. It's rated at 300 watts RMS at 2 ohms, and it includes a subsonic filter--highly recommended when you're using subs in a ported box.
Hope this helps!
Brian
