Can I Add two 12" subs and 2 pairs of 6"x9" speakers to my amplifier
I have a 10 year old pioneer 4 channel class A amplifier GM-X904 in good condition which I had got for $450 and gives me ample power to drive a pair of pioneer 6"x9" speakers and a 12" pioneer sub from my car's headunit. I was wondering if I can add another 12" sub to the existing setup. Please help me on this I have seen a bench test on this amp and it did: 56rmsx4@4ohm 161rmsx2@4ohm bridged I cannot remember the test voltage though.
Other than that I can tell you from digging through the Pioneer catalogue that this unit is from 1996 and specs are:
Continuous power (20-20kHz, 0.04%THD -50x4@4ohm -75x4@2ohm -150x2@4ohm -2/3/4ch capability -no current limiting -S/N ratio 105dB -frequency response 10-80Khz -variable low pass filter 50-120Hz, -12dB -variable high pass filter 50-120Hz, -12dB -independent front and rear input gain controls 400mv-2v -gold plated dual inputs -gold plated thru-put terminal -PWN power supply -fan cooling system -high speed mos-fet power transistors -high performance balanced isolator circuit -made in USA -9-7/8x2-1/4x12-1/4"
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This could be the reason. If you look at the specs for this amp you will see that the continuous power out is rated for 380W bridged. The speakers rated at 450W should be able to handle close to 315W continuous. Now if you split these numbers being you have bridged these speakers, you drive each one up to about 190W continuous. The speakers are being driven approximately by 60% of the rated capability. I personally like to keep it right where you got it, not exceeding 80% of the speakers rated capacity.
I have used Pioneer before but have not run
across this before.sounds like you may have
drove it a little to hard, and and zap one of your amps inside.Take the top off and look
around and smell.
Maybe This Will Help
you are going to need an amp that can supply the right amount of rms power to make it sound good. these sony subs are rated for 380 watts rms. so in order to find an amp that will supply two, you must multiply that figure by two. so you will need an amp that can supply around 500 to 750 watts continuously (or rms). also you are going to want an amp that is either class d or class ab rated. these amps are built to push subwoofers exclusively and will give you the best efficiency and sound out of your subs. you will also want to get an amplifier is a monoblock amp, and not a stereo amplifier. make sure the amp can put out that rms rating at 2 ohms as two 4 ohm speakers equal 2 ohms wired in parallel. i have a kenwood kac9152d that puts out about 2000 watts max at 2 or 1 ohms (900 watts rms) that i used with my two sony xplod 10's for about 2 years. it was kick ***! now i dont know if you need that much power but they will handle it as long as you dont push them too hard for long periods of time, otherwise you might end up blowing them up! (depending on the box size that is, and the quality of it as well...)
i have years of car audio installation experience and can help with setting up and wiring any mobile entertainment system you can imagine. may i ask what kind of music you listen to and what kind of box do you have for these subwoofers?
I do not reccommend that you push the Pioneer speakers over 100 watts. The jenson will already drown the car with bass through your pioneers so much you will want to turn off the bass boost when playing some low bass hip hop songs. It changes from one venue of song to another, so I just keep the jenson bass boost off and use my head unit to adjsut the sound to fit my listening prefences. I am telling you man, you will be blown away . Hook up the pioneers straight to the Channels,. do not bridge. I put Subs in my truck though. I used the Pass output to send the audio to me Jenson 2 Channel 600W amp. I drive one 10 inch enclosed JBL Class A/B Sub. I bridged the output of the 600 W amp to the 10 inch sub in my Z28. The pioneers never get drowned out. I did smoke my 2 channel Amp one time. and also took out a MTD 10inch sub. I am talk shooting flames and smoked the whole car up. I think if you bride the XA4150 to the pioneers, you will have the flaming smoke problem in no time.