ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
I recently acquired a beautiful pair of Redline 60.2 speakers... but when I plug them in to my Beocentre 7700 they work for a few seconds but then seem to cut the power to the system.
Not knowing too much about the maths and science behind what goes with what - I guessed that the "Wattage" may have something to do with it? The speakers are 60 watts, but the power output of the 7700 is "RMS DIN: 2 x 40 W / 4 ohms" so I'm guessing this means that there's not enough power coming from the unit to keep the speakers working? or the speakers are trying to draw too much power?
My old redline 45's work fine. Am I on the right track here and will I ever get to use these RL 60.2s with my 7700? I do have a spare Beomaster 2000 who's power output is "2 x 30 W / 8 ohms" - hmmm that's even less... so that may not work as my plan B either... any ideas?
The 7700 is perfectly capable of driving RL60s as indeed is any B&O amplifier. I would guess there is a short somewhere either in the speaker wire you are using or the speaker itself. Try one at a time first and see if one trips the 7700. The 7700 is simply protecting itself. The amplifier in the 7700 is superb - a conservative 40W a channel but peaks at far more - the 7700 can be regarded in many ways as a Beosystem 8000 in music centre form. Not as powerful but stunning performance. Probably the best record playing music centre ever made.
Don't get hung up on speaker wattage ratings. Sensitivity is more important - the CX range, for instance, are not that sensitive and need more juice to play loudly compared than, say, the S45-2. I have used almost every amplifier that B&O have made with MS150s and all can work perfectly well.
Peter
Thanks Peter,
I opened up the back of them and checked all connections... it didn't seem like anything was wrong but I've since closed them up and put them back together and they're sounding perfect.. like I have a whole orchestra in my living room. Must have been the smallest stray wire or something at the terminals or something. I'm a very happy rabbit now.
Now I just need to work out how to hang these beasts on the wall....
I have the same problem with a beocenter 7007. Even if no spekers are connected the power will cut off after a few seconds. Anyone with a idea?
pacificocean:I have the same problem with a beocenter 7007. Even if no spekers are connected the power will cut off after a few seconds. Anyone with a idea?
Probably the idle current is out of range due to bad trimmers.
//Bo.A long list...
What BO said.- Or one of the small signal transistors in the amplifier introduces a DC offset.This is quite common and easily detected if you have a few seconds of power before closing down.It will also affect unloaded amplifiers and typically send the Beocenter into standby.
Martin