Question about Acoustic Research S112PS Subwoofer

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I have a hum comming from my sub at all times if volume is at low listening level the hum is still there help please

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Check the cable from the amp it mite be earthing try a new cable

Posted on Apr 05, 2011

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2 Answers

Why is there low humming in the receiver sub channel(only?)


Sounds like a shorted capacitor in the sub out circuit.

May 04, 2015 | RCA Audio Players & Recorders

1 Answer

Klh powered sub woofer


Low level inputs are designed to take signals directly from an amplifier's "sub out" connections. That way the KLH amplifier will use those signals to produce sound and the volume can be balanced between the main amplifier and the sub amplifier using the sub's volume controls. Depending on your amplifier and sub, that is the best way to connect them. However, be careful running the RCA cables since the low levels are more subject to interference. Keep the runs as short as possible and use high quality shielded cables for the interconnects.

Aug 26, 2014 | Audio Players & Recorders

1 Answer

The subwoofer output on my Kenwood VR-606 has suddenly stopped working. I have tried the "setup" several times, turning the subwoofer off and back on. Also, when I first power up the system, it emits a low...


It sounds like the problem is not with your VR-606. If you hear a hum from the sub, the problem is more likely to be in the sub's built-in power amplifier. However, it is worth resetting the amplifier to factory presets. To do this, unplug the power cable from the mains supply and reconnect whilst holding down the power on/standby key. If the hum persists, connect any powered speaker to the sub-out socket, power on and listen for the hum. If no hum then suspect the powered sub amp. Turn the sub on with no connection to the Kenwood VR-606. If hum persists, the sub has a problem and will need to be replaced or repaired. By the way, you said there is a low frequency hum through the 'speakers' for about 30 mins. Is that all speakers or just the sub? Hope this helps.
Cheers, Don.

Jul 06, 2014 | Kenwood VR-606 Receiver

2 Answers

Balance is stronger on left than right side. I don't see a button to adjust the balance. i have it hooked up to my lcd as well but the sound is definitely louder on the left and leaving out some of...


You really need to look in the manual. The individual channel levels (and other parameters) are adjusted in the initial setup. This isn't your grandpa's stereo that you just turn on and listen.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Yamaha-HTR-5860-Receivers-manual/id/394ci075/t/2/

Jul 07, 2011 | Yamaha HTR-5860 Receiver

2 Answers

I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...


I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

Mar 01, 2011 | Audio Players & Recorders

1 Answer

What volume level should I set the sub at please. I have a Marantz 7005 av amp and when using Audyssey to set up, the slam from the sub is miniscule. I normally set it a 50% volume when setting up,can...


It might be easier to "skip" the subwoofer meausrement step in Audessy and tune it by ear instead. Refer to page 52 in the manual, step 6/7.

I use familiar music and test tones when I tune my sub to the mains. Generally, I set the preamp trim to -10db, the crossover as appropriate (80 or below), and then bring up the level knob on the sub to taste. Confirm phase alignment, if possible, by having someone flip the phase (if available) so the response is strongest at the main listening position.

Keep it a little "lean" at first, and over the next several hours or days, bring the preamp level up one db at a time. It takes several days of tweaking to arrive at a level that I find appropriate. Once there, I try to ignore programs with bloated bass - remember, not all recordings are created equal.

Should you fond yourself bringing the preamp level to 0 or above, kick the sub amp level knob up a couple of clicks, and back off the preamp level. It's safer to have the amp do the work, than driving too hot of a signal at the preamp level and clipping it.

Jan 18, 2011 | Quad Audio Players & Recorders

1 Answer

I'm not sure how to hook up a powered sub woofer to my rx4109 reciever


It doesn't have a specific low-frequency or subwoofer output.

Depending on your unnamed subwoofer we may be able to work something out. Any sub should be able to work with a full-range Line Level feed.

If you use a Line Level input you won't have volume control of the sub through the receiver.

That would be available at either Tape Out or Aux Out. Just run an RCA pair (or combined to one male out if that's what the sub amp requires).

Whichever one you use, you won't be able to activate that function for listening as it would remove the input to the sub amp.

If your sub accepts speaker level High Level inputs you could drive it with speaker outputs and yoi WOULD have some volume control, assuming the sub had a way to match its initial volume to your other speakers.

Of course, the manual for your sub might explain some of this, too.

Jan 10, 2011 | Sherwood RX-4109

1 Answer

Popping noise on my 12" type r subs


The subs are making that sound when the bottom out + when they reach full excursion be careful if it keeps happening eventually your subs will fail because you will end up damaging the subs voice coil.

Happy Booming

Apr 20, 2010 | Alpine Type-R SWR-1222D Car Subwoofer

1 Answer

Alesis M1 active 620 woofer problem


There clearly is a fault in the sub's amp section. It's probably the main part that does most of the work. It will need to be replaced.

Mar 07, 2017 | Alesis M1-Active MkII Main / Stereo...

1 Answer

Subwoofer works at high volume, doesnt work at low volume


You had the settings set incorrectly and overdrove it. The voice coil leads are burn't open. If you look at the little flexible braids by the terminals I'll bet they are black/brown and maybe even burn't in half. It's toast.

Sep 17, 2007 | Kicker 02S10L74 Car Subwoofer

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