Hey mike, i gotta problem, I have a rockford fosgate 200 watt 2 channel amp running a rockford fosgate T162S component system. In addition, I have 3 Rockford fosgate P2 12's, ran by an 800 watt amp. I grounded a wire to the outside of the 2 sets of rca jacks on my deck to get rid of a wheezing noise. Everything was running perfect until I hit a bump in the road, and now everytime a bass note hits, my component system clips, then continue to play. My component system works perfect at very low volume until I raise it to about a quarter of the way, then it stops playing. Note my subs continue to work perfect, and the protect light on the 200 watt amp blinks everytime the bass note hits, would it be a blown mosfet in the amp? any ideas? Also, I hooked up the 200 watt amp to a pair of 6x9s to make sure the component speakers weren't blown and they had the same reaction.
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dual voice coil subs hook up mono on amp, from amp - from right side + from left side of amp run to sub n then jumper wires from one side of sub to the other side goes negative jumps on positive and positive jumps on negative
The old Rockford-Fosgate was probably producing the rated power. The Sony is most likely overrated. But, it's supposed to be stable on each individual channel down to 2 ohms and will deliver 65 watts RMS into that load. So to get the most from it, your best bet would be a pair of 4 ohm speakers paralleled to each channel. A relatively efficient speaker like the Kicker 07DS600's shown here should provide pretty good sound.
Watts delivered is a function of the voltage times the current. If the amp was 100 percent efficient, it would need 33 amps at 12V for 400 watts. At 14.4V, it would only need 28 amps. Of course, amplifiers are NOT 100 percent efficient, only about 50-60 percent in many cases, but somewhat higher for monoblocks, maybe 80-90 percent. So you're looking at a fuse in the 60-80A range. In the absense of a specific fuse size from the manufacturer, I'd start the primary fuse at a 60A and if the amp blows it on power up/immediately/frequently, move up to an 80A.
All of the Rockford-Fosgate 2-channel bridgeables I've ever seen show using the left positive (+) and the right negative (-) for bridging. But if it's not shown right on the amp, I'd call or email RF for the correct connection. The new amps do show it.
Remove the load from the amplifier (subs) and the RCAs
If the light stays on, there are internal problems with the amplifier, and it needs to be serviced.
If the amplifier works normally, attach the RCA's and power on again.
If it remains on, connect one sub, and then the other.
Your amplifier is a 2 channel amplifier rated at
60 Watt - 4 Ohm - 2 channel(s) 125 Watt - 2 Ohm - 2 channel(s) 250 Watt - 4 Ohm - 1 channel(s)
Your amplifier is not rated for a 2 ohm mono load. If you have Single voicecoil subs wired in parallel, you have a 2 ohm mono load - your amplifier will eventually fail.
That all depends upon whether or not the sub you are running has dual voice coils or just a single voice coil. The 800a4 is a four channel amp; thus the only way you can bridge it will be 3 channel or 2 channel. If you are running a dual voice coil sub then you can wire the amp two channel and get 400 watts x 2 @ 4 ohms. Make sure that you sub can handle this kind of power though.
Here are the specs:
4 x 100 @ 4 ohms (13.8V - <0.05% THD) 4 x 200 @ 2 ohms (13.8V - <0.10% THD) 2 x 400 @ 4 ohms bridged (13.8V - <0.10% THD) Fuse: External 60A Manufactured in 1999 - 2001
that amp should work fine with those speakers,just make sure that they(speakers)are wired for 2 ohms.at 500-600watts coming from amp, you should be getting 250-300 watts per speaker,just dont crank your gain too high on the amp.