Hi All,
I am having an issue at my cinema trying to install the Cat 441 card Surround and Subwoofer, which seemed to cause the centre channel/eq card to fail. our initial setup was as follows.
4.0 sound L,C,R,LS
NEC projector with IMS1000 - sound going to a DMA8plus
'from digital' terminals on the CP65 from the DMA8 are L,C,R,LS,S/W. the RS from DM8 was connected to the LS terminal.
'to amps' terminals we had L,C,R,LS going to a 4 channel amp a QD 4960, which then went out to the speakers.
Today we tried installing the Cat 441 card to enable subwoofer and stereo surround, setup was as follows.
We left the 'to amps' terminals as they were L,C,R,LS going to the QD4960, we then added a QSC1850 amp using the RS,and S/W terminals.
We then seperated the RS and LS wire from the DMA8 and had the LS, to LS and RS to RS at the 'from digital' terminals on the CP65.
Once everything was in place we installed the Cat 441 card ensuring the jumpers were set to stereo etc... and powered up. We ran some pink noise thnrough the system direct from the projector as we don't have the Cat85c card, and turned each amp channel up 1 at a time. All channels were working playing pink noise except the centre channel.
We did lots of troubleshooting changing cables round etc... from one channel to the other and between amps, and always we would get nothing from the centre.
In the end we reverted everything back to original wiring removing the Cat 441 card, and still the centre channel was no longer working. It was at this point we tried changing the Cat 64 EQ card, (we luckilly had a spare) and thankfully the centre channel is working again.
We are reluctant to try again as I can only assume something we did somehow fried the centre EQ card, but im not sure how this could have happened.
Does anyone have any wiring diagrams showing how the wires should be connected as the only thing I can think of is we maybe put the RS and S/W negative wire to the wrong ground terminal on the 'to amps' part of the CP65.
Sorry for the long post and hope everything makes sense above, if anyone has any ideas or suggestions would be greatly appreciated.
Peter
I am having an issue at my cinema trying to install the Cat 441 card Surround and Subwoofer, which seemed to cause the centre channel/eq card to fail. our initial setup was as follows.
4.0 sound L,C,R,LS
NEC projector with IMS1000 - sound going to a DMA8plus
'from digital' terminals on the CP65 from the DMA8 are L,C,R,LS,S/W. the RS from DM8 was connected to the LS terminal.
'to amps' terminals we had L,C,R,LS going to a 4 channel amp a QD 4960, which then went out to the speakers.
Today we tried installing the Cat 441 card to enable subwoofer and stereo surround, setup was as follows.
We left the 'to amps' terminals as they were L,C,R,LS going to the QD4960, we then added a QSC1850 amp using the RS,and S/W terminals.
We then seperated the RS and LS wire from the DMA8 and had the LS, to LS and RS to RS at the 'from digital' terminals on the CP65.
Once everything was in place we installed the Cat 441 card ensuring the jumpers were set to stereo etc... and powered up. We ran some pink noise thnrough the system direct from the projector as we don't have the Cat85c card, and turned each amp channel up 1 at a time. All channels were working playing pink noise except the centre channel.
We did lots of troubleshooting changing cables round etc... from one channel to the other and between amps, and always we would get nothing from the centre.
In the end we reverted everything back to original wiring removing the Cat 441 card, and still the centre channel was no longer working. It was at this point we tried changing the Cat 64 EQ card, (we luckilly had a spare) and thankfully the centre channel is working again.
We are reluctant to try again as I can only assume something we did somehow fried the centre EQ card, but im not sure how this could have happened.
Does anyone have any wiring diagrams showing how the wires should be connected as the only thing I can think of is we maybe put the RS and S/W negative wire to the wrong ground terminal on the 'to amps' part of the CP65.
Sorry for the long post and hope everything makes sense above, if anyone has any ideas or suggestions would be greatly appreciated.
Peter
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