Question about Sony STR-DE875 Receiver

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Sub Out Hi,My subwoofer doesn't engage until the volume is quite loud. Is there a way to increase the output at the sub preamp out? Thanks.

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Have you adjusted your subwoofer?

Posted on Dec 02, 2007


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I have the following setup: AV Receiver: Pioneer

Very common problem with today's receivers. Receivers made today don't have a true preamp section in the amplifier and do not amplify the sound to the extent of an older receiver. I have large 15" front speakers on my system, and have stuck with my 15 year old receiver just because I know that a new receiver will not have the power to drive them well. Many of the newer receivers need to be turned up to 50-60% before you can even hear anything from the speakers.

Aug 08, 2013 | Pioneer Audio Players & Recorders

1 Answer

I just pick up a used LW 10 Powered sub and 2 channel sherwood receiver.What is the preffered method of hook up up the sub with out a pre sub out?

"Sherwood Receiver" doesn't really tell us much about that end of the scenario.

Look at this picture of the sub amp.

You COULD run the Main speaker output to the large Red/Black speaker inputs, then some more wires Out from the other Red/Black connectors to your Main Speakers. That way your amp volume control will affect both equally.

Tweak the sub volume, crossover and phase to match it up to your mains.

May 15, 2011 | Cerwin Vega LW10 Subwoofer

2 Answers

I have the Subwoofer plugged into the output and have it turned ON but it's still not working!

It only drives a self-powerd sub.

The manual...

Page 17:

Setting the Subwoofer Information

Register whether you have connected a subwoofer or not.

Before you start, remember....

• There is a time limit in doing the following steps. If the setting is canceled before you finish, start from step 1 again.

On the front panel ONLY:

1. Press SETTING repeatedly until "SUBWOOFER" appears on the display.

The display changes to show the current setting.

2. Press CONTROL UP / DOWN to select "YES" or "NO."

• Each time you press the button, the display alternates between "YES" and "NO."

YES: Select this when a subwoofer is connected.

NO: Select this when no subwoofer is used.


You cannot use SUBWOOFER OUT ON/OFF on the front panel (see page 14) and adjust the subwoofer output level (see below) when "SUBWOOFER" is set to "NO."

Then continue with setting its relative level and other things.

Feb 06, 2011 | JVC RX-8010V Receiver

1 Answer

I haw alpine mrp-m350 amplifier how many sub can i

Hook up the MRP-M350 to one 4-ohm sub, and you get 200 watts RMS; connect a second 4-ohm subwoofer and the power output increases to 350 watts! All that juice means that your subs won't just be loud, they'll sound clean and thumping.

Apr 08, 2010 | Alpine MRP-M350 Car Audio Amplifier

2 Answers

Connect stereo amplifier to powered sub

You can y out from the main out to the sub.This output is post volume control. set level on sub to desired balance of lows feq to highs

Nov 20, 2009 | Yamaha YST-SW015 Subwoofer

1 Answer

Subwoofer noise

You didn't say is your sub active or passive.If its active first check signal cables from theater system,power line of the sub, it has to be the same phase as the system.If its passive take a voltmeter disconnect the sub from the system and measure for DC voltage on the SUB output on the system when its OFF.If DC voltage is present your amp is damaged.It can also be that the preamp circuit for the sub doesn't mute the input when unit is on stand by and you hear frequency of your power supply (50-60Hz) on the sub

Mar 09, 2008 | Audio Players & Recorders

2 Answers

No Output Subwoofer

hi, ya , some recievers have its setup where u have to enable the sub out,, check the menu carefully, also the player menu if the sub is on or off, let me know..

Jan 10, 2008 | Sony SA-W305 Subwoofer

2 Answers

Subwoofer Connection: Speaker wire to Mono RCA

The easiest solution to use your subwoofer is to buy an amp for it. Any old stereo receiver from a garage sale will probably do just fine.
  1. Connect the mono RCA subwoofer output from your Sony with a 1xRCA-to-2xRCA splitter to both the left and right input of the cheap reciever's tape or aux input
  2. connect both speaker outputs of the cheap reciever to the speaker input on your subwoofer. make sure both black (-) outputs on the reciever connect to the black input on the sub, and the red outputs (+) on the reciever are both connected to the red input on the subwoofer.
  3. make sure the cheap receiver's volume is all the way down. turn your Sony up to about the loudest you'll listen to it. turn up the subwoofer amp until it's loud enough to sound good.
  4. leave the subwoofer amp alone, the Sony volume will all you ever need to touch from now on.

You can even now turn off your subwoofer / adjust the volume easily now!

Oct 30, 2007 | Audio Players & Recorders

1 Answer

RCA Problem

You need an active subwoofer input in your amplifier.Which amplifier you are using? Only latest pioneer amplifiers has active sub input and sub output which can be connected to subwoofer.If you dont have active input then you will have to connect it the way you did in old player.

Feb 10, 2007 | Pioneer DEH-1800 CD Player

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