maybe it is time to release a ultimate stereo power amplifier?

[mert]

Dear Nelson,

I couldn't find a better power amplifier than my X250.5 simply because you haven't built one yet.(stereo not in monos form, space is premium for me) There must be a super stereo amplifier from Pass within 10k-20k usd range. I don't know how you will manage this but it has to be done soon. Or teach me how to modify a X.5 series stereo amplifier, I ,seriously, got fed up with changing power cables for fun.

 

[Nelson Pass]

It depends on what you mean by ultimate.

Candidates:

XA30.5

X350.5

F5

 

[DocLorren]

F5?

Uhoh!

Please Mr Pass, elaborate a bit on this mysterious "F5"

 

[jupiterjune]

Is it too soon to start an "Official F5 builders thread?"

Maybe just a hint Nelson? What type of PS will we need? A typical Aleph type PS, or perhaps a regulated front end? Or something like the ZV5 PS?

JJ

 

[stefanobilliani]

I am very curious

 

[Nelson Pass]

You must wait for publication in AudioXpress. It should be out
in about a month +

 

[DocLorren]

Well, shall we start the F5 thread and leave it blank for you to fill in when the time is right? Or invite the Pass forum regulars to speculate a bit on the topology/design philosophy? We're like children you see, cannot wait, become anxious etc...

 

[mert]

candidates

It depends on what you mean by ultimate.

Candidates:

XA30.5

X350.5

F5

Ultimate: something, Pure Class A, 100 watts per channel 8 ohm, doubles in 4 ohm, very best internal parts, pure copper heat sinks, .........but ofcourse in STEREO!

 

[paulb]

... invite the Pass forum regulars to speculate a bit on the topology/design philosophy? ..

That's the purpose of the DIY Progress Report thread. Or at least what it has turned out to be.

 

[culture]

F5

Well, what about just posting the BOM so we can start ordering parts and be prepared

 

[Dave]

mert,

This is not a Pass design but could be what you are looking for,

http://www.hardwareanalysis.com/content/article/1842/extrema-reference-class-a-diy-amplifier/

 

[moe29]

take the 4 to 6 weeks wait and build a couple of mono block cases!

probably big with good heat sinks

then the hard part will be finished - and you'll be ready for the circuit!

 

[tze-hao yen]

i love aleph-x it sound good space bass highend every thing you name it but some time you have to change the cable................
nothing better then that a pair of aleph-x

 

[paulb]

mert,

This is not a Pass design but could be what you are looking for,

http://www.hardwareanalysis.com/content/article/1842/extrema-reference-class-a-diy-amplifier/

...or not...that's a pretty complex schematic
http://www.hardwareanalysis.com/content/image/11997/

 

[jacco vermeulen]

No, it's not.
(though only worth the extensive heat combined with a <10ppm pre-amp deal)

Lovely design, but the link has no business in the PL section.

I'll take Moe's advice and start prepping a chassis for the all-JFET F-amp.

 

[jupiterjune]

the all-JFET F-amp

no, no, no -- please say it isn't so!

JJ