2. amps-preamps
  3. 1371603241

Anyone have/ordered the Job 225?

There's almost no consumer impressions of this amp on the internet... but the 6moons review is intriguing.
girlsgeneration
grannyring's avatar
grannyring
6,507 posts
 
Understand. The heatsinks are only warm at low volumes, but very, very hot at high volumes. At idle, just warm. 
devilboy
1,176 posts
 
Hmm.
Like I said, I'll check tomorrow in the a.m. and post my findings.
At the temp you're describing, it's like it was class A or something.
srosenberg's avatar
srosenberg
209 posts
 
@grannyring...
what is the sensitivity of your speakers and the gain of the preamp you are using?  this matters much with the job's 35db of gain and 0.75V sensitivity.  i found that i also had a hiss with my 94db speakers and modwright preamp until i bled off quite a bit of gain at the inputs to the job.  after doing so, the noise floor was back to where i expected - ie, no noise whatsoever.

that said, my amp gets warm, but never too hot to rest my hand upon, even after several hours of use, so it's possible there may be more going on with your amp.
grannyring's avatar
grannyring
6,507 posts
 
How did you bleed off gain at the inputs? Speakers are 84db effecient and my tube preamp I am not sure about. It is not high gain however. 

The top cover is warm, however I am talking about the heat sinks on the back of the amp only. These sinks get very, very hot. 
georgehifi's avatar
georgehifi
10,312 posts
 

0.75V sensitivity for full output! With all this gain and 94dB speaker why use a active preamp with gain?? Most sources give out more than 2v these days, even phono stages, and the Job I believe is 100kohm input impedance, all this is a perfect match for a passive pre such as the $49 Schitt Sys

http://schiit.com/products/sys

Then you will not have any hum or noise problems and as a bonus zero colourations that all actives have.

Cheers George

  

More to discover