What happens if the polarity of the DC input changes? I want to use this amplifier after a switching circuit, will this work?
646483
i fried one by reversing the in put . i now use a checking diode to keep this from happening .
1228663
The switches are not polarized. Think of them as a piece of wire that is continuous when the button is pressed. You can connect them with either terminal to either pole of your voltage source.
1994522
It would for a short time and quickly burn out. It is rated at 4 ohms, below that would damage the amp
2238363
No problem. I use in a one-channel antique jukebox for the phono input. Very few of the modern ones have a phono input anymore and they need a pre-amp. This is a road-warrior amp, and I have used several of them for different projects over the years. One takes the output from my surround sound unit and powers speaker pairs all over the house. Another goo feature is that the off-on switch stays in the position you leave it and can be used in a switched power outlet of a master amp or anything else you want it to respond to. I keep coming back to this amp and have been very happy with them...especially the price and availability. No problem. I use in a one-channel antique jukebox for the phono input. Very few of the modern ones have a phono input anymore and they need a pre-amp. This is a road-warrior amp, and I have used several of them for different projects over the years. One takes the output from my surround sound unit and powers speaker pairs all over the house. Another goo feature is that the off-on switch stays in the position you leave it and can be used in a switched power outlet of a master amp or anything else you want it to respond to. I keep coming back to this amp and have been very happy with... » Read More No problem. I use in a one-channel antique jukebox for the phono input. Very few of the modern ones have a phono input anymore and they need a pre-amp. This is a road-warrior amp, and I have used several of them for different projects over the years. One takes the output from my surround sound unit and powers speaker pairs all over the house. Another goo feature is that the off-on switch stays in the position you leave it and can be used in a switched power outlet of a master amp or anything else you want it to respond to. I keep coming back to this amp and have been very happy with them...especially the price and availability. « Show Less
1846092
When testing polarized parts, such as a diode. It should only allow current in one direction. When you try to push current through it in the wrong direction it will read .0L, because it wont let anything through. I had to check diodes for a power supply. When I connected it in the correct direction, it read .5, but in the wrong direction, .0L.
1510637
No it does not. Go back and check your wiring you might have reversed the polarity.
1280868
I wouldn't, it sounds like it should work but speaker switches are inexpensive and they have resisters in them. I read a old article on having 2 sets of speakers on 1 amp and I think they said you fed one threw the other. I don't remember how they said to do it I think they said you go from positive of the amp to positive of the 1st speaker form the neg. of the no.1 to pos. of 2 and from neg of No 2 speaker to neg of the amp. Bottom line is get a speaker switch better safe then sorry.
1035743
According to Easy Setup Guide that came with the amplifier, page 5 drawing, indicates a switch for voltage selector on GENERAL MODEL ONLY; which means there are two models.The amplifier I bought does not have the voltage selector switch.
2282952
I'm not sure. There is no internal switching for this, but, in principle, you could do it externally. Very little information comes with the unit, and I've never seen a circuit diagram. Although you would probably be OK, I have noticed that the output protection circuit is very touchy. For some reason it refuses to let the output relays close when the line voltage is greater than 127V. (I bought a voltage regulator.) So, I guess I would be wary of doing anything unusual with the output.
388595
No problem. I use in a one-channel antique jukebox for the phono input. Very few of the modern ones have a phono input anymore and they need a pre-amp. This is a road-warrior amp, and I have used several of them for different projects over the years. One takes the output from my surround sound unit and powers speaker pairs all over the house. Another goo feature is that the off-on switch stays in the position you leave it and can be used in a switched power outlet of a master amp or anything else you want it to respond to. I keep coming back to this amp and have been very happy with them...especially the price and availability.
458396
This switcher has dual inputs from two amplifiers. If only 1 amplifier is used you would just connect to the A input.
1301966
This is a power amp, not a turntable preamp. It expects line level input. Though you might be able to modify it, given sufficient electronics expertise, I would not recommend it.
823510
Dear Keith B.,As long as the amplifier is with Voltage: DC 12V will do.Before add amp ,please make sure the wires are enough and you'd better ask a technician to make sure that for you .Sincerely yours,Astra Depot
1619587
In short, yes. Any input will be output as balanced when using balanced connectors coming from the DC-1. HOWEVER, if you get interference from the non-balanced input BEFORE it hits the DC-1, it will be amplified with that interference. The balanced out only guarantees that any interference between the DC-1 and power amp / powers speakers will be eliminated. This would be the case with any pre-amp with balanced out.
132956
Yes that us the input voltage not the output . the output voltage is multiplied in the amp so the input voltage can stay low. If their is a direct short then it will pop the fuse instead of amp
1550036
that is correct. if you connect them incorrectly nothing will happen. the voltage output will be one or two volts. if you connect them correctly you should get 18 volts. good luck.
1479499
With a standard 12v DC adapter. Look on the PCB and you will see a + and - sign indicating the polarity.