Good evening, The problem was caused by me.... i've disconnected my bridged sub woofer when i left for holidays...but unfortunately i didn't remove the cable from the amplifier...the result... the tape went out and the + cable touched the - cable....now the amplifier doesn't work at all,no lamps no sound nothing...i've checked the fuses 2 and the cables... all seem to be ok ,please what can i do.Here in Greece i can't find someone to fix it. Thanks Giorgos
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Re: AMPLIFIER NOT WORKING
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
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First of all.
Using two different kinds of sub woofers, is not an option, as these two sub woofers have different specifications and you should never mix sub woofers.
Now the better choice from the 2, would probably be the Rockford. (cant be sure without knowing the models, power handling is also a factor in how well either of the sub woofers will play, but Rockford as a rule makes better sub woofers than Sony does)
In my opinion, both the sub woofers deserve a better amplifier than what Boss has to offer.
However to connect either of these sub woofers, you would need to determine how many voice coils it has and how many OHM the voice coil/s are.
If it is a DVC (dual voice coil) and each voice coil is 4 OHM or 2 OHM, then you can connect one voice coil to one channel of the amplifier and the other voice coil to the other channel of the amplifier. If it is a DVC 2OHM you can also connect it wired in Series/Series to give a 4OHM load and should be connected to the BRIDGE dedicated speaker outputs of your amplifier.
If it is a SVC (single voice coil) and it is 4 OHM, then you can connect the sub woofer to the designated speaker outputs of your amplifier that states BRIDGE.
DO NOT run the amplifier in BRIDGE mode at 2 OHM as this will probably damage the amplifier.
Nice amplifier. However it is best suited for speakers and not for sub woofers.
Connect the plus (+) from speaker output 1 and the minus (-) from speaker output 2.
Connect the plus (+) from speaker output 3 and the minus (-) from speaker output 4.
Now the amplifier is in bridge mode, which will give you 300 WATT RMS at 4 OHM load.
If you are bridging the amplifier to run sub woofers then do not forget to set the X- Over to LPF on the channels that you are planning to bridge. Whatever you do, make sure that the load you are asking the amplifier to play is no lower than 4 OHM. Playing this amplifier in bridged mode lower than 4 OHM is a recipe for trouble.
If you meant to connect your Sub woofer speaker which has an impedance of 8 ohms , you can use the bridge connection between the two channels to connect.
This will be noted on the output terminals and so the speaker can be bridged between the left and right channels.
The sub woofer can be connected by bridging one side of the right channel to the other side of the left channel. Usually this will be marked on the speaker connection terminal and use will not have any trouble to locate. If not use the + ve of the right and the - ve of the left to connect to the sub woofer. turn it on and check . If you find the phase different- with less bass- reverse the connection and try. this will work fine. Good day
What you need to check is the impedance that you are connecting at. If you are using for sub woofers... you need to check how you wire them up. If you are using bridge mode then make sure that you have a 4 ohm load. This is possible with a single coil woofer which has an impedance of 4 ohm.
If you have a single dvc woofer, then you would have to either wire it up in stereo with a 4 ohm coil to each channel. If you would like to run it in brifge mode then you would have to invest in a single dual 2 ohm sub woofer and connect it with the coils in series thus obtaining a 4 ohm load.
If you have multiple woofers then it becomes more tricky. You can use a channel amp in bridge mode by getting 2 dual 4 ohm dvc woofers. You would have to connect the woofers themselves in parrallel but to the amplifier, you MUST have the woofers in series with each other. Thus getting a 4 ohm bridged load on the amplifier.
Connecting this amplifier any other way can cause it to overheat and fail.
It is possible if the model amp you have is bridgable to 1 channel. Usually when you bridge an amp you will need to hook one wire to the positive side of one channel and the negative side to the other. You will need to consult you user manual for the amp or get the manual from the sony website for instructions on how to bridge the amp or if the amp is even bridgable.
If your planning on using a stereo system in your car or home you need to follow some rules otherwise your just wasting money. The watts of a speaker means how much power it can handle. The higher the number the more power it can handle, and usually the louder it can get without distorting. If your amp has more power or close to the wattage rating of the speaker you will blow the speaker, it can even get so hot it ignites. The amount of ohms is the electrical resistance the speaker provides. House speakers usually have 8 ohms where car speakers tend to use 4. 8 ohm stereo means your left and your right are separate channels and each speaker has 8 ohms. 8 ohms bridged means you bridge the left and right channel to increase the power output of the amp and you have to use either 1 8 ohm speaker, or 2 4ohm speakers in parallel to prevent damage to the system. Same goes for 4 ohms. If I remember correctly you want your sub(woofer) to have a wattage rating 20% higher than the amp. Remember if the speaker overheats its no good, but most amps if they overheat they just shut off until they cool off, but only if they state they have a thermal overload protection.
When you say the 40 Amp fuse blew. Was it your mains battery fuse or was it the fuse on the amplifier? If it was the fuse on the amplifier then you may have hurt the amplifier. The Kenwood KAC-8101D is a 1000 Watt monoblock amplifier. Therefore if you say that 1 of your woofers is not playing, then it is almost certainly blown if you are sure it is connected correctly. Try disconnecting it and only running the woofer that tries to play. If this woofer is still working correctly, you will notice a drastic drop if the sound of your bass. The reason for this is because you have changed the impedance load on your amplifier due to the fact that the other woofer is not working. Have your working woofer checked and replace the faulty woofer then you should be banging again.