No input signal to amp from receiver?

[md_gt]

Newbie here, didn't know where to post this question.

I recently purchased a Harman Kardon AVR240 as well as a Behringer EP1500 to power my subwoofer. I have connected them from the subwoofer pre-out on the receiver to the behringer input through a shielded male-to-male rca cable which connects to a 1/4" unbalanced mono jack adapter.

I've tried everything but I cannot get the EP1500 to receive a signal (the signal light doesn't even light up).

Any help/ideas would be appreciated.

[Stoney]

Have you checked the settings in the HK for the sub and base management?
Below is a quote from page 28 of the manual. If it is set to LFE all you will get is LFE effects. If it is set for SUB LFE+L/R, you will get all base below the setpoint of the base management (100 hz default) + LFE.

• If a subwoofer is connected and you wish to have
the front left/right “main” speakers reproduce bass
frequencies at all times, and have the subwoofer
operate only when the AVR 240 is being used with
a digital source that contains a dedicated Low-
Frequency Effects, or LFE, soundtrack, press the
‹/› Buttons on the remote so that LFE
appears in the on-screen menu.
• If a subwoofer is connected and you wish to use
it for bass reproduction in conjunction with the
main front left/right speakers, regardless of the
type of program source or Surround mode, press
the ‹/› Buttonsoon the remote so that
SUB LFE+L/R appears in the on-screen
menu. When this option is selected, a full-range
signal will be sent to the front left/right “main”
speakers, and the subwoofer will receive the
bass frequencies under frequency selected, as
described below, as well as the LFE information.

I also read somewhere in these forums about differences between the balanced and unbalanced adaptor jacks. Are you sure you are using the correct adaptor?

[md_gt]

I have tried every concievable setting on the AVR240 regarding the sub and still no output through the pre-outs. I wish I had another receiver with pre-outs I could test the amp with but unfortunately I don't.

I've read that unbalanced connectors are needed for this, any input?

[Stoney]

Could you try one of the other rca outputs from the receiver to see if you get any input into the berringer?

Do you have a receiver with tape outputs?

[md_gt]

I tried the other rca preouts for the other channels, none gave a signal to the amp.

Unfortunately I have no receiver with tape outputs or preouts of any kind to test with.

Could it be that I'm using an unbalanced 1/4" jack when it might require a balanced jack?

[Stoney]

According to this thread https://www.htguide.com/forum/showth...ight=Behringer the unbalanced would be correct. Sorry I couldn't be of any more help. You might try posting your question in the
Mission Possible DIY https://www.htguide.com/forum/forumdisplay.php?f=6 forum. There are a lot of guys over there that use Behringer amps.

[md_gt]

Thanks for your help Stoney, I'm gonna give the Mission Possible DIY section a try.