The Aleph 30 is an improved Aleph 3 with 30W clean Class A Power per Channel.
I decided to build 2 Monos.
Details per Channel:
300VA Toroid
10x 15,000 uF Panasonic caps
Toroid inductors in power supply
Superfast rectifier diodes
3 pair of IRFP240 output stage
Case: 3HE 450mm x 300mm
Heatsinks: each 0.4K/W result in 20°C above ambient
Should be nice to drive my K2 clones
We need to talk!
Wow that's nice!!
Rob
An Aleph 30 Driving K2 Clones??? Hope you mean just the horn(s).
I have built Aleph 1.2 monos earlier, and they dont have a chance at driving the Woofer in the K2. They couldnt even get the Woofer in my L65 Jubal to work properly.
The mids and highs on the other hand is heaven
Best regards Tim
What pcbs are the Guido?
The Aleph 2 was fine running the 4345s and earlier iterations..
It is useful to understand this type of amplifier is not push pull it is SE with an actie current source and will not double the power into 4 and 2 ohm loads normally
A standard (particular model 2, 3, 4, 5) are set up and designed particular set of operating conditions.
You can if you actually understand what you are doing optimise the design meaning the supply voltage, bias, currenty gain and transconductance other output stage for virtually any loudspeaker.
The Aleph 3 was the first one I built back in 2000, then the 5 and later on the Aleph 2 which was a stunner. The Aleph 3 or the 30 are fine or horns.
They do run hot and use a resonable amount of power like 100-150 watts per mono block. If that scares you then this is definately not for you.
The more recent commerical Passlabs X series were a different approach (A/B) biased heavily into class A and have a more dynamic capability and are more suited to low impedance loads. The Aleph owners however prefered to Biamp using the Aleph on the mid and top end where appropriate.
The current Passlabs X.5 series and the most recent AX.5 series have a number of refinements and can handle any load and are sonically superior to earlier Aleph and X Series
Ian
Guido,
as always "PRIMO" they should drive MY K2 clones quite nicely. And just in time for my Birthday. Your so thoughtfull !!!!
Its interesting that some believe they are good for the horns only. Did you learn something from the SAC build? I can see where you had the screws out and the covers off !
There seems to be 2 very informed schools of thought regarding Bi-amping !
Rich
It fairly simple.
If you don't need to don't.
Please don't go digital with class A amplification
If you do class A is a waste of time.
I really don't know what you are talking about. My Aleph 2 blow the hell out of my 4435.Originally Posted by timc
An Aleph 30 Driving K2 Clones??? Hope you mean just the horn(s).
I have built Aleph 1.2 monos earlier, and they dont have a chance at driving the Woofer in the K2. They couldnt even get the Woofer in my L65 Jubal to work properly.
The mids and highs on the other hand is heaven
Best regards Tim
BrianGT
The Aleph 2 are stunning !! I can hear absolutely no problem for them to drive my 4435's. Just the opposite. They do really kick the 4 2234.
Whenever you're readyWe need to talk!
I am sure Giskard has the capability to build up some of these..its all a matter of time!
Hi Ian ,
I,m running the 45's with class A SAC mono blocks. Rated at around 35 watts per. They have no problem making the 2245's dance. I think I get the BIG RACK syndrome sometimes ( I need to find a Girl-friend) Besides, your too bloody busy building secret stuff.
The only digital is the itunes signal via fibre- optic to the Quad cdp 2. Then analouge to the nak pre. It sounds superb. But, one always want it to sound better!
I would be better off spending my £££ on room acoustics. I'll just keep reading and someday !!!!!
Have a great day,Richard
There's nothing particularly secret about the above.
The point to respect is the patent belongs to Pass Labs and any construction can only be for home diy use. They tend to be too heavy to ship so that tends to control that issue.
Yes, class A can be considered a high current designed because of the high standing bias current running through the output stage is constant and there are no non linearity issues per say.
There are good and bad designs of any class of amp and the above are at the top of the heap in terms of subjective performance of their genre.
Ian, I did'nt mention the brand .
I realize the walls have ears after the horn threads got removed.
however, the linearity thing has meis it possible to explain in laymans terms ?
Rich
Today was the first soundcheck.
Only 1 Mono is finshed.
It really kicks the 250ti. Wonderful smooth sound and no lack of power. Good woofer (LE14H-1) control.
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