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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Lounge => Topic started by: Patrick Campbell on April 07, 2015, 08:03:56 am

Title: QRX 153/75 - 15's are working then not working -
Post by: Patrick Campbell on April 07, 2015, 08:03:56 am
Hey guys,

I have 4 QRX 153/75's which I love but in the last few months, a 15 in two of the cabinets is intermittent.

When I plug in the cab, the 15 wont work for a minute, then when I push the fade up more.....the 15 comes on for a bit and then stops again.......... These are bi-amped, so I am muting the highs so I can just listen to the 15

I battery tested the 15 and it pops, also swept the 15 and it seems ok when working but I hear some slight noise at 150-180

I am thinking can it really be a situation with both 15's dying at the same time, OR is it possibly a cold solder joint on the back panel that has a green board attached to the backside of the NL4's inputs.

Any experience with these boxes and this problem would be appreciated.

Patrick
Title: Re: QRX 153/75 - 15's are working then not working -
Post by: Quenton Haynes on April 07, 2015, 11:00:04 am
Patrick,
Could be a crossover issue. I had the same thing happen to my boxes. Turned out to the crossover in one of the boxes. I replaced the crossover and this seemed to work.

Quenton

Hey guys,

I have 4 QRX 153/75's which I love but in the last few months, a 15 in two of the cabinets is intermittent.

When I plug in the cab, the 15 wont work for a minute, then when I push the fade up more.....the 15 comes on for a bit and then stops again.......... These are bi-amped, so I am muting the highs so I can just listen to the 15

I battery tested the 15 and it pops, also swept the 15 and it seems ok when working but I hear some slight noise at 150-180

I am thinking can it really be a situation with both 15's dying at the same time, OR is it possibly a cold solder joint on the back panel that has a green board attached to the backside of the NL4's inputs.

Any experience with these boxes and this problem would be appreciated.

Patrick