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+--- Thread: SAM effects (/Thread-SAM-effects)
RE: SAM effects - Antoine - 21-Nov-2016
(21-Nov-2016, 20:00)4tLotM Wrote:(21-Nov-2016, 18:01)Antoine Wrote: If the exact temperature increase is normal or not depends on whether you provide sufficient ventilation (65 degrees is quite high) but that the temperatures increase with higher SAM usage is to be expected.
The SAM percentage controls the amount of bass extension and the amp has to provide much more power for that extra extension.
I would think though that your D amp would rise about as much in temperature as it provides most of the current.
My actual temps. at -25 db. I didn't thaught that the A-Amp makes the work.
Holy moly! This kind of proves the more efficient cooling in at least the 250/1000Pro but that A amp is seriously hot compared to the D amp and supply. While the Devialet has many protections built in, including over temperature I'd contact Devialet and send them this picture anyway just to verify that this is right.
AFAIK nobody has ever reported/mentioned these big differences on the forum but perhaps it is perfectly OK. The Pro series are of course very new so things could change compared to the older series.
RE: SAM effects - Jean-Marie - 21-Nov-2016
That does not look right to me and not consistent with the explanation that Devialet gave that on the new ADH the ratio of A vs D is much lower than on the previous models. Therefore having a A amplifier much hotter than the Ds look very suspicious to me and would be worth reporting to Devialet for an explanation.
RE: SAM effects - Confused - 21-Nov-2016
I recall the audition I had for the 1000 Pro. It was a very hot day, extremely hot in the demo room, we did use SAM. I think we got the class A temp to 57 deg, but the D and supply temps were more or less 50 deg. Nothing like the delta reported here. My own Pro is usually in the high 30's or 40's with some serious SAM enabled playing.
To be clear, my view is that if you are getting 69 deg, then the unit is faulty. Devialet have advised in the past that up to 65 deg is OK, you are way over that. What's the temperature in your listening room?
RE: SAM effects - 4tLotM - 21-Nov-2016
(21-Nov-2016, 21:19)Confused Wrote: I recall the audition I had for the 1000 Pro. It was a very hot day, extremely hot in the demo room, we did use SAM. I think we got the class A temp to 57 deg, but the D and supply temps were more or less 50 deg. Nothing like the delta reported here. My own Pro is usually in the high 30's or 40's with some serious SAM enabled playing.
To be clear, my view is that if you are getting 69 deg, then the unit is faulty. Devialet have advised in the past that up to 65 deg is OK, you are way over that. What's the temperature in your listening room?
Room Temp 20,2 deg, in the last hour i'm getting to -10 vol. and ended by 73 deg. I think my unit is not working ok.
RE: SAM effects - 4tLotM - 21-Nov-2016
(21-Nov-2016, 23:10)4tLotM Wrote:I switched sam off and the temp goes down to 48 deg (A Temp). So sam will be no longer in my set up. Mabe one last track: Talking Heads - Burning down the house.(21-Nov-2016, 21:19)Confused Wrote: I recall the audition I had for the 1000 Pro. It was a very hot day, extremely hot in the demo room, we did use SAM. I think we got the class A temp to 57 deg, but the D and supply temps were more or less 50 deg. Nothing like the delta reported here. My own Pro is usually in the high 30's or 40's with some serious SAM enabled playing.
To be clear, my view is that if you are getting 69 deg, then the unit is faulty. Devialet have advised in the past that up to 65 deg is OK, you are way over that. What's the temperature in your listening room?
Room Temp 20,2 deg, in the last hour i'm getting to -10 vol. and ended by 73 deg. I think my unit is not working ok.
RE: SAM effects - Confused - 22-Nov-2016
Referring this thread back to post #53. Has anyone else tried the SAM 'gui' test? I have to say I found it fascinating, well worth trying!
RE: SAM effects - kerkhoffd - 22-Nov-2016
Give it some time 4tLotM. When I got my new Devialet it showed the same rediculous temperatures. It was too hot to touch sometimes, but after some time it changed. Temperatures dropped to normal range and sound quality improved a lot. Think it took a week or two continuous playing internet radio.
RE: SAM effects - 4tLotM - 23-Nov-2016
(22-Nov-2016, 23:13)kerkhoffd Wrote: Give it some time 4tLotM. When I got my new Devialet it showed the same rediculous temperatures. It was too hot to touch sometimes, but after some time it changed. Temperatures dropped to normal range and sound quality improved a lot. Think it took a week or two continuous playing internet radio.
The 250 pro plays now for 200 hrs. Especially Classical and some Jazz takes the 250 pro above 70 degrees. Only with dpm off and sam off the temp. get's around 48 deg. But with dpm on the SQ falls off.
RE: SAM effects - Soniclife - 23-Nov-2016
Moved to To SAM or not to SAM and DRC #5.
RE: SAM effects - Antoine - 23-Nov-2016
YabaVR has opened a thread for these tests here: http://devialetchat.com/showthread.php?tid=3714