Originally Posted by xtrips
I need your help with something I think is a malfunction of the product, so please confirm that or not, and help me solve the problem.
I will describe the facts first:
- The way the EQ process works (not the Self-EQ) as I understand is that it feeds the sweep signal through the RCA EQ-Output to a receiver, while the Sub is muted you level the Main speakers' level to 76dB while listening to the sweep signal (through the mike of course), and then you un-mute the Sub to level the Sub's output to 76dB too.
- The thing is there is no sweep sound coming out of the sub when un-muted. I should expect a sweep signal right?
- According to the previous facts you would think that something is broken between the sweep generator inside the Sub and the Sub's amp, and that's why you don't hear the sweep signal through the sub, only through the EQ-Output RCA port to the receiver, right?
>> The thing is that when I use the Self-EQ which doesn't involve a sweep signal through the EQ RCA output, the sweep signal is heard through the sub, which means that the internal connection between the sweep generator and the sub's amp is not broken.
I am assuming from your description that you are trying to use a classic Digital Drive series subwoofer and not a Digital Drive Plus series subwoofer.
In the classic Digital Drive the sweep tone is generated internally. When you use the Self-EQ mode, the tone generator feeds directly to the subwoofer amplifier internally, so no cables are needed.
When you attempt to manually EQ the system you need to send the sweep tone to the receiver then back to the subwoofer. Doing so allows the receiver's crossover, and main speakers to be taken into account. To do this the EQ-output on the DD subwoofer is connected to an unused input on the receiver. This input is selected and the receiver's LFE output must be connected back to the subwoofer's LFE input. If it is not, then the signal path is not complete. You can test that the manual EQ is working by connecting the EQ output on the DD subwoofer directly to the LFE input on the subwoofer, you should hear the subwoofer play.
Given that you are hearing the sweep tone play through the main speakers and not through the subwoofer, I believe the problem lies in a setting on the receiver. The signal being supplied to the AV receiver from the DD subwoofer is a two channel track, there is no LFE. If your main speakers are set to large in the AV receiver, then most likely no bass will play on the subwoofer unless you have a dedicated LFE track, which we do not. If you tell your receiver that you have small speakers the problem should be solved.
If the main speakers are already set to small then you may also check that the A/V receiver is not in the discreet mode which will bypass any of these settings causing information only to go to the channel on which it was recorded.