[Oil Country]

Hi,  I have a Bryston 4BSST2 and a Lexicon 512 I am using in a home theatre 7.1 set up.  The amps are located in a Middle Atlantic Rack.  I currently have the 512 rack mounted below the 4BSST2 and the 4BSSt2 on a 2U shelf right on top of the 512.  The rack is open on both sides, the room can reach temperatures of 30.0 Cel. after a movie is playing for 2 hours.

What the problem is after the 2 hour mark I have one of the LED's on 512 turn to a solid red.  It is the 2nd light from the right side if facing the amp.  After letting amp cool down for a few hours the channel comes back. 

1.  First of all, the red LED lights up on same light every time and shuts down this channel on the amp.

2.  Lexicon 512 (9BST) feels very warm to touch, not sure how hot amp should run?

3.  Have one rack space below 512 open, none above.


What can I do stop this from happening?  Is this normal for amp to shut channel down?  Has anyone ever had this happen before?

If I give one more space in rack above 512, hence  creating one space away from 4Bsst2 will this solve problem? 

Would some sort of cooling fan help more than creating space?

Any suggestions here greatly appreciated.

Cheers

Oiler Country

[James Tanner]

Hi oiler

Yes the channel is shutting down due to overheating so a small wisper fan or more space would help.

James

[Oil Country]

Thanks James for the info.  Do you think one rack space above and below should solve problem? Or would a whisper fan work better?

And could anyone recommend a brand one of these fans that would work inside a Mid Atlantic rack?  And just curious where do these fans go?  On back of rack and circulate air on amp?  Not quite sure on theory here.

Cheers

Oiler Country

[Anonamemouse]

Posting a picture might give us more insight, and would help in giving suitable suggestions...
I only have 1 inch of space above my 4B SST2, which works here.

Maybe you should consider something like this:

[Phil A]

Thanks James for the info.  Do you think one rack space above and below should solve problem? Or would a whisper fan work better?

And could anyone recommend a brand one of these fans that would work inside a Mid Atlantic rack?  And just curious where do these fans go?  On back of rack and circulate air on amp?  Not quite sure on theory here.

Cheers

Oiler Country

One rack space is not much.  Even some receivers recommend 8 inches of clearance.  In my secondary basement system I have the audio rack recessed into the wall into the unfinished portion with the receiver on the top shelf.  I cut out most of the ceiling above the area to allow for air flow.

[Oil Country]

Hi,  I just finished reconfiguring rack I now have 2 complete spaces above Lex 512 (9BST) and 1.5 spaces below and roughly 2 spaces above 4Bsst2.  Will hopefully put to test this weekend.  I have removed a Cisco network switch that was generating a lot of heat in room too.  Hopefully brings operating temperatures down in room. 

And just curious do those fans sit behind the amps on back of rack? Or would they work better in a rack space like other audio gear?


Cheers

Oiler Country

[James Tanner]

Hi,  I just finished reconfiguring rack I now have 2 complete spaces above Lex 512 (9BST) and 1.5 spaces below and roughly 2 spaces above 4Bsst2.  Will hopefully put to test this weekend.  I have removed a Cisco network switch that was generating a lot of heat in room too.  Hopefully brings operating temperatures down in room. 

And just curious do those fans sit behind the amps on back of rack? Or would they work better in a rack space like other audio gear?


Cheers

Oiler Country

Hi Oiler,

You want the air to move past the heatsink in an upward motion - convection cooling - so put the fan below the amp.

james