Serj22

Serj22

Full Audioholic
I have an Acoustic Research HD510 Subwoofer, and it has an auto-on function, but when I turn on my receiver in the "infinite" position, the subwoofer immediately goes into red led protect mode, and won't turn on normally unless switched on and off a few times. It is attached to a subwoofer out on a receiver, and on a Y-splitter RCA in to a stereo input on the subwoofer. Could I be overloading it even with no volume?
 
TLS Guy

TLS Guy

Audioholic Jedi
I have an Acoustic Research HD510 Subwoofer, and it has an auto-on function, but when I turn on my receiver in the "infinite" position, the subwoofer immediately goes into red led protect mode, and won't turn on normally unless switched on and off a few times. It is attached to a subwoofer out on a receiver, and on a Y-splitter RCA in to a stereo input on the subwoofer. Could I be overloading it even with no volume?
I would bet money your receiver has a fault, and is sending out a huge turn on thump, which is causing your sub to act in this manner. There is likely a bad cap somewhere in your receiver.
 
Serj22

Serj22

Full Audioholic
I would bet money your receiver has a fault, and is sending out a huge turn on thump, which is causing your sub to act in this manner. There is likely a bad cap somewhere in your receiver.

I have two receivers, and I tried both of them. Both give the sub the same issue, so could it possibly be something wrong with the subs built-in amplifier, or perhaps the wrong impedence load somehow?
 
TLS Guy

TLS Guy

Audioholic Jedi
I have two receivers, and I tried both of them. Both give the sub the same issue, so could it possibly be something wrong with the subs built-in amplifier, or perhaps the wrong impedence load somehow?
That is really strange. It is not an impedance issue. If your sub has a two pin AC connector, then the sub power supply must be sending a surge to ground back through the receiver.

From what you now have revealed, I would take that sub out of service immediately and have it checked by a service tech. It might well do serious damage to your receiver as well as being an electrical hazard.

Sub power supplies are renowned for a multiplicity of problems. Most sub amps are in the POS category.
 
Serj22

Serj22

Full Audioholic
I'm going to take it to an audio junky store nearby and see what's up. It's just really odd, because I've never had this type of problem before. Would it make a difference if it was connected into the low frequency effects spot instead? The amp/sub has: speaker lead in (stereo), RCA Input (stereo), and LFE IN, and LFE out.
 
TLS Guy

TLS Guy

Audioholic Jedi
I'm going to take it to an audio junky store nearby and see what's up. It's just really odd, because I've never had this type of problem before. Would it make a difference if it was connected into the low frequency effects spot instead? The amp/sub has: speaker lead in (stereo), RCA Input (stereo), and LFE IN, and LFE out.
You should be using the LFE connection. Power amps are renowned for turn on thumps. Your type of connection should only be used as a last resort, if there is no LFE output.
 
Serj22

Serj22

Full Audioholic
Oh ok, I didn't know if it would be an LFE in since the receiver only says "Subwoofer" and I know there are some that say LFE specifically. I'm going to try that and see if it solves the problem.
 
Serj22

Serj22

Full Audioholic
IT appears to work now with just the LFE input. Thanks mate. So then what's the input and output for if they don't work right?
 
Knucklehead90

Knucklehead90

Audioholic
You might try using a different cable before you lug it into the repair shop. Cables and connectors do go bad.

If the sub has speaker level inputs thats what you should be using to connect it so the internal crossover can work effectively. Some subs don't have a crossover with the LFE input.
 
Serj22

Serj22

Full Audioholic
If the sub has speaker level inputs thats what you should be using to connect it so the internal crossover can work effectively. Some subs don't have a crossover with the LFE input.
Ok, so if I use the speaker inputs, should I use a Rca from the sub out on the amp and split it into 2 leads? Or do I have to feed off a channel already in use? I have a 5.1 with a secondary "speaker B" setting where there's 2 more channels (I'm assuming in stereo).
 
Knucklehead90

Knucklehead90

Audioholic
Ok, so if I use the speaker inputs, should I use a Rca from the sub out on the amp and split it into 2 leads? Or do I have to feed off a channel already in use? I have a 5.1 with a secondary "speaker B" setting where there's 2 more channels (I'm assuming in stereo).
No - just connect wires from the L/R front speaker connections on the receiver to the sub's speaker level connections. No RCA connection is needed. The sub will use a very minimal amount of power and it won't be missed by the L/R speakers. You are in effect connecting the sub and the L/R speakers in parallel.
 
Serj22

Serj22

Full Audioholic
All right, I'm going to try that today, I was worried it would divide the power up too much or change the impedence.
 
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