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   Home » Audio Discussions » SS Power Amps - the FoxNews of Audio. (26 posts, 2 pages)
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  »  New  Yamaha B-2 V-FET amplifier...  I do like my B-2...  Audio Discussions  Forum     19  199152  07-20-2009
08-19-2009 Post does not mapped to Knowledge Tree
Amir
Iran Tehran
Posts 347
Joined on 02-11-2009

Post #: 21
Post ID: 11487
Reply to: 11477
Low Power Class A Solidstate Design
fiogf49gjkf0d
I think low power ss design is the only way we can make ss to sound good. in my idea all high power ss design i heard had no emotion in their sound in comparison by good SET designs like AN UK Ankoru.
the first SS design that make me happy in comparison by other ss designs was Vitus SS-101 integrated amplifier. vitus is 50 watt Class A push pull design.
Vitus micro linearity was exceptional in comparison by other so expensive high power ss design but i should add even vitus micro linearity is not in the league of good SET designs.
vitus was even better than many tube designs i heard in iran.

I should say 90% of tube amplifiers in market are not my favorite (i do not like to describe them crapy) and 99% of ss designs are like their tube brothers , this means that design in my idea is more important than components though i agree the best result is given by SET amplifiers.

I listened to Pass labs 100 watt amplifier and it's sound was like other high power designs. never heard first watt project.




www.amiraudio.com, www.hifi.ir
08-19-2009 Post does not mapped to Knowledge Tree
Axel
South Africa
Posts 80
Joined on 07-18-2009

Post #: 22
Post ID: 11497
Reply to: 11487
50 watt class A, PP...
fiogf49gjkf0d
well fine, my X350.5 does 50 watt class A, and of course in push-pull. I use it with 120 watt max rated 3 way speakers of about 87 dB efficiency. You can see on the 350.5's  centre instrument dial if you go out of class A. If I go out, I usually fear for my 8" bass drivers first so it actually NEVER happens during 'normal' listening.

Any tube I have heard trying to satisfy a 4 - 6 ohm box-speakers ~ 86 - 88 dB just doesn't get there without going soft in the bass, loosing some control. Some like this effect, I don't. That leaves horns --- and THEN we start talking issues aplenty.

4 to 6 way, phase tracking of each horn!? how?, active amping with 8 to 12 tube monos, just for a starter.
My Pass is pulling ~ 670 watt in idle and it's giving me heat exhaustion in summer, no way I'm gonna survive with a stack of tube monos. So, it's horses for courses and I try to get the best from what I can live with.
Cheers,
Axel
08-19-2009 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,156
Joined on 05-28-2004

Post #: 23
Post ID: 11503
Reply to: 11497
The First Watt shall be better then Second Watt
fiogf49gjkf0d
I do not care about all of Nilsson Pass amps; I feel that all the same and all are very sub-qualified.  A few years back Mr. Pass went for his low-powered SS single-ended amps and they might be more interesting.  I do not have them and I never seen anybody with sanity or good speaker used them, so it is hard to say what the “First Watt” amps do.  BTW, there is a “might be interested” thread at AA about the subject.  I hope it will not be vandalized by the typical AA sewer’s intellectuals.

http://www.audioasylum.com/forums/set/messages/6/61599.html

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
08-20-2009 Post does not mapped to Knowledge Tree
Amir
Iran Tehran
Posts 347
Joined on 02-11-2009

Post #: 24
Post ID: 11504
Reply to: 11503
Pass labs
fiogf49gjkf0d
In my idea pass labs high power amplifiers are in under average even in comparison by market average standard.
it's sound xa1000 was not good and i think when a company accessed a good market for his products then start to making crap products.
in my idea pass labs now make bad components like many other famous brands.





www.amiraudio.com, www.hifi.ir
08-20-2009 Post does not mapped to Knowledge Tree
el`Ol
Posts 225
Joined on 10-13-2007

Post #: 25
Post ID: 11505
Reply to: 11504
From A to AB
fiogf49gjkf0d
I never listened to Pass amps, neither class A nor class B, but I think I know a counter-example:
The new powerful AB amps from Martion in my opinion play in the same league as the small class A amps in the Orgon active horn system concerning freedom of any coloration. The sad thing: I could afford them, but a highend amp alone doesn´t make a highend system and I don´t know components with similar cost-benefit ratio in other categories.
08-20-2009 Post does not mapped to Knowledge Tree
Stitch


Behind The Sun
Posts 235
Joined on 01-15-2009

Post #: 26
Post ID: 11506
Reply to: 11503
The matching is important
fiogf49gjkf0d
 Romy the Cat wrote:
I do not care about all of Nilsson Pass amps; I feel that all the same and all are very sub-qualified.  A few years back Mr. Pass went for his low-powered SS single-ended amps and they might be more interesting. 

The Cat

I think, Pass became really his "famous name" with his Aleph power amps ("Single ended Transistor Design"). They had indeed a very good sound with matching Speaker. Best was a high sensitive one, I listened to such a combination with a 99dB 8 ohm Horn speaker, that was amazing. Speed, holographic picture and the Illusion of "being there" was really better compared to most other transistor combinations.

Pass.jpg


In my opinion the best way for good reproduction is to "see" the speaker and the amp for it as 1 unit. Most problems are based on mismatches. Same with those Alephs. Never made to drive difficult loads, most were paired with exactly those (Expensive to Expensive, typical High End mistake).
After those Pass introduced the X-Series, to serve the customers/Dealers much more powerful amps because they wanted that. I listened to those, really horrible. Dead, thin, ultra-analytic, no Body. Seems, that others had the same opinion, later they were offered as the XA-Version (A for Aleph circuit). But interestingly, it never worked in the way the Aleph worked (from Sound Quality). Seems, that some designs are limited in amplification. I listened to those again, not my cup of tea to be honest. When you know what was possible before, then this is a waste of time.But they are quite successful, probably based on the support from DIY groups who made those by their own (Pass Designs are online). Here "they" see what he has done and they were never able to do it on they own (typical).Pass himself created a new - additional - Company, The First Watt, offering amps (Solid State) for high efficiency speakers. I guess, he liked what he heard before, but to make money the bigger amps are better to sell.




Kind Regards
Stitch
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  »  New  Yamaha B-2 V-FET amplifier...  I do like my B-2...  Audio Discussions  Forum     19  199152  07-20-2009
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