Heat heat and more heat??


My Jeff Rowland model 8 amp seems to be giving off more heat than I can ever remember. The sound still seems great, but the amp gets hot quicker than I ever remember ( heats up the room quickly!) and it is still warm even after several hours after shut down. Any ideas as to what's going on? Is it time for a trip back to Mr.Jeff?
128x128daveyf
Strange that the two channels gave different results. Not sure how to explain that.

Just to confirm that the correct pins were measured, pin 1 of each of the female XLR connectors would be the pin closest to the right side of the connector, when viewing the connector from the rear of the amp.

Given those results, additional measurements that might be useful to know would be the resistance between the ground sleeves of the two RCA connectors, and the resistance between pin 1 of the two XLR connectors.

In any event, I would still expect connecting the black wire to XLR pin 1 to work, although using the right channel XLR connector seems like the surer bet.

Best regards,
-- Al
Al, the reading at the two RCA's is 0.4 ohms, same as at the two xlr's.
I took the caution of replacing the battery in the meter today ( even though apparently the old one was ok), which seemed to slightly solidify the readings, so I re-took the reading at the left xlr and rca ground, it fluctuated a little but I suspect the true reading is also 0.4 ohms. Seemed to float around there.
Sounds good! So pin 1 on either XLR connector should be a good point for connection of the black wire from the sub.

Best regards,
-- Al
Thanks again Al. As soon as the amp comes back from the factory, I will connect the sub as suggested. Appreciate all the help.
In the home environment, where I am running cables that are what...1.5meters typically ( and VERY well shielded) I just don't get it. The extra expense and hassle for balanced..why??

The reason for this is that balanced connections (if done correctly as they are in a stage environment) will sound better even if the cable is only a meter long. The balanced line system was devised for the purpose of eliminating cable artifact (which allows them to also be longer lengths).