I'm afraid not, Goldmund never use XLR. The new preamp seems to be a simple solution, and i'll be very surprising if propose a headphone output.
JOB 225 2-channel Power Amplifier ... update ...
- Thread starter joeinid
- Start date
I'm afraid not, Goldmund never use XLR. The new preamp seems to be a simple solution, and i'll be very surprising if propose a headphone output.
- Thread Author
- #1,083
Welcome to the forum achaves! Thank you for joining.
I've used Revel Studio2 with my Job 225 amp and loved the combo. Of course I never cranked it like some members here do, but for my low to moderate listening sessions, it was perfect! You might want to wait for the mono blocks at the end of the year, but if you don't listen excessively loud, I think it's a workable and even desirable. For me and my listening levels, it's fine.
I've used Revel Studio2 with my Job 225 amp and loved the combo. Of course I never cranked it like some members here do, but for my low to moderate listening sessions, it was perfect! You might want to wait for the mono blocks at the end of the year, but if you don't listen excessively loud, I think it's a workable and even desirable. For me and my listening levels, it's fine.
Jack
Active member
I've used the JOB for the last several months with the Vandersteen Treos which JA measured at 82db and they do fine even at higher levels.
Do you find the heat sink gets very hot? My speakers are 8ohm/ 89dB and I can't even touch it for one second at its hottest. I've started using a small USB fan firing at the heat sink and it makes a massive difference.
Jack
Active member
It used to get really warm when I first got it during the break-in period and then cooled down. To be honest haven't even thought to check it lately.
When I had mine it was at most lukewarm but my speakers were easy drive.
Just did a test using a digital thermometer with probe touching a heatsink. Music = dub reggae, volume = medium, room = medium, ambient temp = 24c
without fan = 66c/ 152f. With fan = 30/ 86
Speakers are easy 8ohm load
If this is out the ordinary, I'll get in contact with Job, but I remember someone reporting similar figures on another site.
without fan = 66c/ 152f. With fan = 30/ 86
Speakers are easy 8ohm load
If this is out the ordinary, I'll get in contact with Job, but I remember someone reporting similar figures on another site.
Jack
Active member
I just checked mine after about an hour at of about 85db ABB and if I press down on the heat sink it is in fact hot, but the case itself is not. I though heat dissipation was the heat sinks job?
Just redid the test on a cooler day (21C inside), playing 50's Jazz. = 55c, playing for half hour or so. That would increase with deep bass no doubt.
At least not for the Job :|. Someone else measured theirs on another site and got similar resulsts. Playing loud (which I wasn't) could easily take it over 70C! Hopefully the internal components aren't going to have a shortened lifespan.
It got plenty hot in winter too when the ambient was in the teens centigrade.
At least not for the Job :|. Someone else measured theirs on another site and got similar resulsts. Playing loud (which I wasn't) could easily take it over 70C! Hopefully the internal components aren't going to have a shortened lifespan.
It got plenty hot in winter too when the ambient was in the teens centigrade.
RPM-123
New member
So, why are you so concerned about the heat sinks becoming warm or even hot? That just shows that they are doing their..."Job"!
Now, if the case became too hot to touch, then that would be cause for concern. Just relax and enjoy and the music it makes!So, why are you so concerned about the heat sinks becoming warm or even hot? That just shows that they are doing their..."Job"!
RPM is right, why worry? Back in the 80's I sold several class A amps the you could almost fry an egg on, especially the Bedini amps. There were no issues. And if you have ever ran Atmosphere OTL amps, these will heat up your whole room.
My Job 225 ran burning hot, burning hot. I found one of my rca inputs to be loose and turning/twisting. I presumed this was causing a short, and sent the job for service, which was very expedient. Supposedly not a short..... but upon return it performed flawlessly without becoming burning hot. It is easy enough for Jobbers to check the stability of the rca inputs. Considering how we, me too, may change interconnects this could lead to a maddening intermittent issue as well.
Q: is there by now a consensus as to what fuse will serve musicality the most ?
Q: is there by now a consensus as to what fuse will serve musicality the most ?
- Thread Author
- #1,095
Interesting. So Job tweaked your amp to alter its running temp!
Thanx for the fuse news, Joe !
From before, I would not say that my Job was "tweaked" towards a lower temp.. The only info. after discussing potential short was - no short. Rca input tightened up. Thats all.
Personally, I could imagine that there was a relationship between my loose rotating connector and the excessive heat. And if it happened to my unit, maybe it is happening to other units as well.
Maybe just a correlation, rather than a cause and effect. At least, simply check to make sure your rca connector aren't loose.
From before, I would not say that my Job was "tweaked" towards a lower temp.. The only info. after discussing potential short was - no short. Rca input tightened up. Thats all.
Personally, I could imagine that there was a relationship between my loose rotating connector and the excessive heat. And if it happened to my unit, maybe it is happening to other units as well.
Maybe just a correlation, rather than a cause and effect. At least, simply check to make sure your rca connector aren't loose.
medivierte
New member
i don´t have the 225 but i know that the older Job amps, being hyper-wide bandwidth amps , were rather sensitive to RF and some units from first batches showed to be prone to oscillation problems in some conditions. I guess that Job people have solved this and improved a lot the amp, but the job225 is still a wide-bandwith amp.
Specially for people living in a bad RF area, near a AM /LW radio station, the Job could be amplifying something else than music, specially if bad shielding cables are used. This may result in overheat the amp and its HF protection (and RL circuit at the time). I would try to use line cables with good quality shielding and construction, running far from the speaker cables to avoid HF oscillation.
Specially for people living in a bad RF area, near a AM /LW radio station, the Job could be amplifying something else than music, specially if bad shielding cables are used. This may result in overheat the amp and its HF protection (and RL circuit at the time). I would try to use line cables with good quality shielding and construction, running far from the speaker cables to avoid HF oscillation.
Hi. I'm using original Chord Anthem ($400 approx) with decent shielding. Also tried a cheaper cable but didn't notice any difference in heat.
View attachment 6491
To quote Chord:
The Anthem was the first Chord Company interconnect to employ high frequency effective shielding, helping it to achieve new levels of performance
they are tight.