"ODEP" crown macrotech

Weve just got a load of macrotech amps. we havnt run them up yet but ive switched them on and they all go into "ODEP" mode. which is some kind of protect from what ive read on the net.

Could this be a mains problem in our building? All five of them do the same thing....

ahhhh  iam being a spanner.  just read abit further in the manual pdf and its all there. cheers for your help though dude

When the red odep lights go out, the drivers are dead

Just so you know :)

The light flashes to the signal correct, but shows no sign of how much DB is being achieved or when clipping occurs, unless it does flash red when clipping and i've never pushed it that hard! Which I doubt i've NEVER done!

//t0m

If you have Macotech 3600VZ or 5000VZ, is normal the ODEP led's be light on , after 4 secs of starting up and internal status check.

Edited by DjLeco - 05 May 2009 at 1:20am

yes, I agree, this amp (MA3600) does seem very good at destroying speakers. It's the only macrotech I really don't trust.

By the way the MA5000 is the only common macrotech that has a red (actually dual colour) LED and it doesn't flash to indicate clip, it indicates the amp is delivering maximum current and could flash well after the amp clips but not usually before. Clip indication is the same as the rest of the series, a bright flash of IOC, and from memory it holds for 0.5 sec for output clip and 0.2 sec for input clip. Not the most clear system admittedly. ODEP should never dim, if it dims there is a problem. ODEP is a misunderstood feature IMO, it's intended to keep the amp operational rather than disconnecting the load as is standard. It's not a signal limiter and doesn't provide any speaker protection. It's there purely to protect the output devices and in most cases does a good job with the advantage of still having a usable amp rather than one that's disconnected the speakers or is going through a thermal cycle.