XPA vs UPA and heat

[2pt2]

I have been running my UPA-5 for a couple of days and the channels that are working barely get warm.

This makes me wonder if something might be wrong with my XPA-2. It gets pretty darn hot playing the same speakers at the same volume.

Any ideas?

Thanks!

[roadrunner]

Oct 21, 2010 7:41:49 GMT -5 2pt2 said:

I have been running my UPA-5 for a couple of days and the channels that are working barely get warm.

This makes me wonder if something might be wrong with my XPA-2. It gets pretty darn hot playing the same speakers at the same volume.

Any ideas?

Thanks!

Take a good look at the product pages for each amp and pay particular attention to the Number of Output Devices per channel. You will notice that the XPA-2 has 24 highout devices divided between 2 channels, 12 per channel. The UPA-5 only has 4 output devices per channel. In addition to running triple the output per channel, the XPA-2 is designed to run at a higher bias level giving yet more energy (heat) that needs to be dissapated. Then take a look at the output level of the transformers of the two amps... 1200VA for the XPA-2 versus only 600VA for the UPA-5.

[2pt2]

Thanks.

I knew the XPA had bigger and badder components. I just didn't realize they used extra energy even if they were not delivering more power!