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Author Topic: CP55 Non-sync too loud Stephen Frazza Expert Film Handler Posts: 161 From: Nutley, NJ, USA Registered: Mar 2004 posted 11-30-2004 12:39 AM                        I have a couple Dolby CP55's.When in non-sync mode some are just to loud. I'v turned down the pots all the way on the Cat 242 card but it's still way too loud.We just have cd players hooked into the non-sync inputs.I've tried different cd's (normal and burned) and they all just play too loud. I asked my tech about this awhile back and he said i'd have to put resistors between the cd player and the inputs on the CP55. Is this my only option and if so what size resistors should i use? I read in another post to use the headphone out on the cd player but none of the ones i have have this.  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 11-30-2004 03:57 AM                        Put a 5k in series with the hot and cold lines, and then another 5k across the input. Cheers  |  IP: Logged Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 11-30-2004 07:25 AM                     Also make sure you do not have an SRA-5 hooked up. If you do, you are turning down the wrong pots.  |  IP: Logged Stephen Frazza Expert Film Handler Posts: 161 From: Nutley, NJ, USA Registered: Mar 2004 posted 11-30-2004 07:48 AM                        We have 3 with SRA-5 cards hooked up but they all use the newer way to use 03 format instead of the 10 Aux and 2 of those have DTS units on them so I know it has to be that way. So i know i am using the correct pots.  |  IP: Logged Dominic Espinosa Phenomenal Film Handler Posts: 1172 From: Boulder Creek, CA. Registered: Jan 2004 posted 11-30-2004 04:23 PM                     If it's an option you could try lowering the source.  |  IP: Logged Stephen Frazza Expert Film Handler Posts: 161 From: Nutley, NJ, USA Registered: Mar 2004 posted 12-05-2004 01:31 AM                        Peter, I understand how to put a 5k in series with the hot and cold lines but can you explain what you mean by another 5k across the input. Theres the right and left connector and then the 2 grounds are tied together i'm just not sure what across the input means. Thanks  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 12-05-2004 03:29 AM                        Hi Connection of the resistors.. Remove the two "hot" lines coming from the CD (to NSL and NSR conns). Solder a 5k resistor to NSR and one to NSL, then attach your hot feeds to the other ends of the resistors. Then add another 5k between the NSL terminal and GND, as well as a 5k between NSR and GND. This is a voltage divider cct and whould halve the level.. Good luck !  |  IP: Logged

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