Question 1

I have 4 apeakers I want to connect to this would this work if I cross the wires to make 2 speakers go into the channel of one?

Accepted Answer

Haphazardly connecting speakers in combination to an amp can have disastrous results for your amp and speakers.  However if you know the rules of wiring speakers in combinations of parallel and series you can safely do this.  Basically, two identical speakers wired in parallel cuts the resistance (ohms) in half and doubles the output power of the amp.  The result of this could potentially burn up your amp and blow out your speakers.  To be sure you must calculate the resistance and also know the minimum resistance of the amp and maximum power of the speakers you are using.  Or you can connect the speakers in such a way as to have minimal effect on your amp... Read on.To calculate the resistance in a parallel installation, multiply the resistance of the two speakers and divide the result by the sum of the resistance of the two speakers.  If you are using home stereo speakers (usually 8 ohms) your calculation would be (8*8)/16=4 ohms.  Since this amp is rated at 4 ohms you would be just fine.  If however, you used two 4 ohm speakers (like most car stereo speakers) you would end up with only 2 ohms of resistance.  Also, two 4 ohm speakers wired in parallel would double the power output to 50 watts from this amp.    The other side of this is wiring your speakers in series.  Connect the negative terminal of one speaker to the positive of the other speaker. Then connect the unused positive and negative terminals on the pair of speakers to the amp as if it were just one speaker.  When you do this, resistance is increased (calculated by the sum of the resistance of each speaker in the loop).  Two 4 ohm speakers would result in 8 ohms of resistance.  Two 8 ohm speakers would be 16 ohms of resistance.     An 8 plus a 4 would be 12.  Tree 4's would also be 12.  Ideally, try to keep the total resistance to 16 or less.  One drawback in this is that the power output is reduced in this process.  For this 4 ohm 25 watt amp, taking the resistance up to 8 ohms would cut the power output by half.  16 ohms would cut it by 75%.  Using combinations of series and parallel connections can be used to your advantage.  For example, creating a parallel combination of two pair of 4 ohm speakers wired together in series would result in 4 ohms of net resistance with likely only a minor impact on the power output on this amp - (4+4)*(4+4)/16 = 4 ohms of resistance.Remember that these calculations are for each channel of the receiver.  So whatever you do to one channel would be independent of the other, but it's best to keep the channels balanced.  By the above method you could connect up to eight 4 ohm speakers to a 4 ohm stereo amp.In the example of one of the commentators below, he connected three speakers in parallel.  Assuming these "ceiling speakers" were 4 ohms each the net result would be resistance increasing to 5.33 ohms (4*4*4/12=5.33) and a corresponding reduction in amp power output.  This would reduce the maximum volume through the speakers, but would not damage this amp.

Question 2

Where can I find a fuse replacement?

Accepted Answer

i dont know the voltage and amperage off the old fuse, you can read it and go to Home Depot or Frys electronics for a replacement

Question 3

I've had it for a few months and it's worked great but suddenly it just won't turn on AT ALL! Do I need to replace a fuse on it? What's wrong with it?

Accepted Answer

anyone with a ohm meter can check it for you. if you don't have one or some one that has a ohm meter just install a new fuse...

Question 4

Can I leave the power switch on all the time and if so will it shorten the life of the unit?

Accepted Answer

I would never recommend leaving an amplifier on all the time.  If your phone was paired to it, it will automatically connect about 10-15 seconds after turning the power back on.

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Pyle Bluetooth Stereo Amplifier - Mini Blue Series Audio Power Amplifier | Wireless Streaming | USB Charge Port | AUX (3.5mm) Jack | 2 x 25 Watt (PCA12BT)

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