my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Dolby CAT 685 vs. 685A

Author Topic: Dolby CAT 685 vs. 685A Tom Ostertag Film Handler Posts: 41 From: St. Louis, MO, USA Registered: Jun 2014 posted 09-25-2015 11:10 PM                     Is there any difference between these boards (quality, reliability, specifications, fidelity, etc.), apart from the SMD construction of the 685A? I'm on the lookout for a 6-channel ADC for my CP500, but I'm not sure if I should try for one over the other. The original 685 looks like it has some potentially nasty tantalum caps, but I can make quick work of those if they're a problem. The Dolby block diagram says the 685 (not sure which was around at the time) is 18 bit, and I know the rest of the whole system is 44.1 KHz.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 09-26-2015 03:23 PM                     In my limited experience with those boards I've seen some which are constantly displaying some input level on L and R even though nothing is plugged in. Not sure whether that may be the difference and no, I didn't measure the output to see what that noise was.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.