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Discussion Starter · #1 ·
I recently built my first diy sub. I have a Mal-x in a pr'd 8 cubic foot enclosure tuned ~17.5hz. My receiver is a Pioneer elite vsx-21txh and my amp is a beringer EP4000.

When I connect the Pioneer directly to the EP4000 and run MCACC everything works great. The sub sounds pretty good and it pressurizes the room very well. But when I add the reckhorn to the mix, I have to turn up the gain all the way on the reckhorn and pioneer to get decent sound levels. I thought if anything I'd need to turn down the sub out on the pioneer.

I'm using all RCA cables with a RCA to 1/4 adapter into the EP4000. Am I missing something or do I have a defective reckhorn b2?
 

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Discussion Starter · #3 ·
I have channel one all the way up. I also tried channel two all the way up but it made no difference
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Discussion Starter · #4 ·
Also, if it matters, I'm running the amp in bridged mode and have the voice coils wired in series.
 

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Discussion Starter · #6 ·
I had the "main level" at 12 o'clock, the subsonic filter just under 9 o'clock, boost at 9 o'clock and frequency at 20 hz.
 

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Discussion Starter · #8 ·
I tried a few things last night and I now think the left channel on my reckhorn is the problem.

I tried the main level at max (I've been using the left channel only the entire time) and it made no improvement. Then I switched to the right channel just for grins and it works like a champ. The only issue is with the main level maxed out and the gain on the EP maxed out I can hear a slight hum from my listening position. I don't think it's a ground loop because it doesn't go away with a cheater plug (or could it still be a ground loop?).

Anyway, after the holiday I will put in a call to CSS as the reckhorn is new. I just wanted to rule out my noobness first.

Thanks for the help Mike!
 

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Discussion Starter · #9 ·
Got my reckhorn issues sorted, the problem was me and not the b2 :eek:opssign:

Everything is working perfectly now and after fixing a ground loop, I am at max gain on the EP4000 and the B2 with zero hum! Even with the sub trim at -8 db on my pioneer, my pr'd mal-x has ridiculous amounts of bass. I am a very camper!

Thanks for the help in trying to troubleshoot my problem Mike. I appreciate it :T
 

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Can you post details of the 'fault' and how you fixed it together with how you resolved the ground loop problem.

It may well help others in a similar position. :)
 

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Discussion Starter · #11 ·
Sure. The problem with the left channel on the reckhorn was probably me wiring the input and output backwards. In an effort to get rid of the hum I replaced both rca cables at the same time. It didn't make a difference but I decided to switch back to the left channel to try one more time before I call CSS and it worked perfectly. I tried the old cables and it still worked fine. I cant reproduce the problem now which is why I think I had it wired backwords the other day :dumbcrazy:

To fix the ground loop I had to have my cable company fix the ground on my cable modem.
 

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Sure. The problem with the left channel on the reckhorn was probably me wiring the input and output backwards. In an effort to get rid of the hum I replaced both rca cables at the same time. It didn't make a difference but I decided to switch back to the left channel to try one more time before I call CSS and it worked perfectly. I tried the old cables and it still worked fine. I cant reproduce the problem now which is why I think I had it wired backwords the other day :dumbcrazy:

To fix the ground loop I had to have my cable company fix the ground on my cable modem.
Thanks for the update k_t.

Glad you got sorted:T
 
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