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Off-Grid Party Sound Systems

Step 13Attach the pre-amp crossover

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3 comments

Apr 29, 2011. 1:21 PMweener says:

Hi there. I followed this great guide with great results! ... I've gotten myself a really hardcore off-grid party sound system - just what i was looking for. This tutorial is one of a kind.

BUT, i have to minor problems!

The setup:
2 x Behringer B215XL 15" with the above preamp and a Tripath TK2050 amp installed in each. Both are wired identical to each other!
Wired up to 24V.

1. one of the speakers are noticeably less loud than the other. We tried change their power source, audio input, and adjusting the preamp (tweeter / woofer screws) - Ideas?

2. When speakers are connected to the same power source - a loud noisy interference appears.. When one speaker is disconnected the noise goes away, also when they're on two different power sources. So the interference travels through the power cords?

I would really appreciate some help and ideas!

It's not a BIG problem, but it's annoying.

Below, a picture of the setup inside the speaker

Cheers

May 11, 2011. 1:39 PM

dan (author) says:

about the speaker being less loud - the things you checked all are important. in addition, check that the woofer and tweeter are connected to the correct outputs on the amp. if you get the outputs reversed then the woofer signal is sent to the tweeter, and it is not as loud. need to adjust the preamp tweeter/woofer screws when you do this to verify.

your photos are a bit low-res, its hard for me to see the wiring detail.

May 11, 2011. 1:29 PM

dan (author) says:

besides loose connectors, check that you have a 'common ground' between the two systems and any mixer or audio source. i have seen random noise is cases where the mixer was running on one power source and the speakers on a different one - if you have multiple power sources the ground needs to be connected together with a wire. check the wiring diagram in STEP 5 of here:
http://www.instructables.com/id/Battery-Powered-Mobile-Party-Sound-Systems