Cocolino,
thanks, I learned soemthing, sometimes the way I do things just don't "feel" right.
thanks, I learned soemthing, sometimes the way I do things just don't "feel" right.
Since you have expressed interest, it looks like Rushmore
will ship with 3 X 10 watt SE Class A amps and a 50 W
Aleph X. It draws about 350 watts / ch, and we have included
an auto-shutoff option which unbiases it after 1/2 hour
without signal to save energy.
The first pair go to the Netherlands this Friday for a show.
will ship with 3 X 10 watt SE Class A amps and a 50 W
Aleph X. It draws about 350 watts / ch, and we have included
an auto-shutoff option which unbiases it after 1/2 hour
without signal to save energy.
The first pair go to the Netherlands this Friday for a show.
Mr. Pass:
Is Rushmore related to your FirstWatt venture, or is FirstWatt still a surprise in the making? Just curious.
Thanks
Mike
Is Rushmore related to your FirstWatt venture, or is FirstWatt still a surprise in the making? Just curious.
Thanks
Mike
I'm asking because my Aleph X has at least 50W into 8ohms and it's running at 15V rails. And I've read the previous posts.😉
Unless one can use higher rails and allow only as much bias as required for a given power requirement, is it the case here?
Unless one can use higher rails and allow only as much bias as required for a given power requirement, is it the case here?
The way I see it the 3 10W "Mini_A" type amps will have 25V rails take 50 w each out ot the 350 total and 200 watts will go to the AX which will also have 25V rails.
Transistors question
Hello all,
Is it possible to use IRFP044N instead of IRFP044 in AlephX?
Symbol Ids Vdss Rds(ON) Pmax Case
[A] [V] [W] [W]
IRFP044 57 60 0,028 120 TO247AC
IRFP044N 49 55 0,02 100 TO247AC
Hello all,
Is it possible to use IRFP044N instead of IRFP044 in AlephX?
Symbol Ids Vdss Rds(ON) Pmax Case
[A] [V] [W] [W]
IRFP044 57 60 0,028 120 TO247AC
IRFP044N 49 55 0,02 100 TO247AC
Transitors IRFP044N
Thanks for reply,
IRFP044N are twice cheaper then IRFP044. According to the parameters IRFP044N would be use, but what about sonic inflluence?
Thanks for reply,
IRFP044N are twice cheaper then IRFP044. According to the parameters IRFP044N would be use, but what about sonic inflluence?
I think there are other factor that influence the sound more than the the IRFP's you pick. The bias for one. I have used IRFP 064n, IRFP 044n, IRFP 048n, IRFP 140n, IRFP 250, IRFP240, and IRFP 254. They all sound good.
Peter, I you sure they are 8 ohm speakers?
Peter, I you sure they are 8 ohm speakers?
Peter Daniel said:
In comparison with the sound of Zen V2 vith 40V rail I'm planning for a +/- 25 volt.
Bias or not I like voltage, like mosfets
😉
Peter Daniel said:
I am even higher than Stefano, I'll use 30-0-30. Sort of a double aleph 2 with a total of 24 mosfets/chn I am thinking a 1 ohms for the resistors (maybe 0.75 if I feel like pushing it) ~6 amps/chn, 4 r-theta heatsinks/chn should allow for 360W dissipation maybe 400W. That should give a super clean 100W/8ohms which is more than I'll ever need.
Stefano thinks like I do on this one. I think it's better to lower power expectation into lower impedance loads than it is to run out of voltage margin.
The mosfets with odd suffix number like 150 or 054 or that contain the letter N are not recommended, don't ask me why, I don't remember, there was extensive discussion here months ago.
I don't know why, but I was always under the impression that the rails voltage level dictates the power level, but obviously this is not the case. Does it mean that one can actually choose any power level without caring much about how high are the rails? (I mean here higher rails than required). Why everybody was so much concerned with 12 V rails in the beginning of the thread?
Peter Daniel said:
you're right!
+-12V rails means 72W max on 8R, and 144W max on 4R (with high enouth bias, of course)
maybe slightly less, cauz you can never output as much voltage as the poser supply rails, but it's still enough power woth 12V rails