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In Reply to: RE: LOL! Brand new Krell for $175. Man, those pirates are ballsy! posted by David S. on November 25, 2015 at 09:37:25
Seems to me that inside of that `Krell` box is hiding two power amp modules + PSU of legendary JLH1969 - A class 10 W amp , which altogether in case that unit works properly is not that bad offer for that asking price .Regards !
__
"Art which does not have the appearance of art is true art."
- Old Roman saying -
Edits: 11/25/15Follow Ups:
Pretty ugly gear. It's like buying a watch on the Street for $10 that says Gucchi.
Yes it is ugly ! ,but hey it is JLH1969 2x10W A-class inside , maybe some nice & sweet sounding surprise can go out from that ugly gold painted box :),
looking inside the box everything seems OK ,four Nichicon PSU capacitor ,BC(former Philips)axial type output capacitor , big red maybe some MKC or MKP input capacitor ,maybe some decent toroid main transformer is hiding there ,
even those four Motorola 2N3055 seems pretty authentic to me ,with same series numbers on top , but who knows ...?
Regards !
__
"Art which does not have the appearance of art is true art."
- Old Roman saying -
Edits: 11/25/15
What is a JLH1969 ? And do 2N3055 make for decent amplification? I've used them for power supply pass transistors with the LM723 but never for audio amplification.
JLH1969 is simple BJT four transistor A-class amplifier designed by John Linsley Hood in 1969 (UK),in some way it resemble Williamson tube amp architecture,
but in my humble opinion it is more close to Julius Futterman OTL amp architecture , if is made properly is very good sounding amp , originally uses obsolete two Motorola MJ480 but 2N3055 is very good substitute , faster modern power BJT`s lead this simple amp into heavy instability .Regards !
__
"Art which does not have the appearance of art is true art."
- Old Roman saying -
Edits: 11/26/15
Very interesting, I had no idea. Thanks for the additional info and link.
Using the KRELL logo - and the chassis resembles the Krell KSA-5 headphone amp - just seems like someone is not trying to sell a counterfeit product but is clueless about branding. No one in their right mind would believe that this is actually a Krell product. I think that this represents an idea someone over there had to sell a headphone amp based on the KSA-5 circuit and they made a run of casework with that Krell logo to house the things; they didn't sell well, and so now they have to find new uses for these silly Krell chassis. Rather than a counterfeit of an existing product, I think the things were designed to show they were based on a copy of the KSA-5 circuit- and you can still buy the KSA-5 version of this, as well as KSA-5 -based boards. However- according to Head-Fi the KSA-5 is not really a very good sounding design.These are actually an OK chassis and the JLH class-a circuit in this specific one is a decent version of that amp- and likely better than the KSA-5 circuit; but having that Krell logo on there really just cheapens the thing to the point of no return.
To look at this thing and draw a conclusion that "all Chinese electronics are junk" is to generalize based on a Western misunderstanding of a product that was the result of a Chinese misunderstanding....
I have seen this same chassis for sale without the Krell logo. You can also buy boards - empty or stuffed- for JLH type amplifiers if you want to house them yourself. FYI these are typically low power designs, 10 watts per channel or so.
For those interested in the JLH class a circuit and it's permutations see http://sound-au.com/tcaas/index.htm
Edits: 11/27/15 11/27/15 11/27/15 11/27/15
I'm not concerned with the Krell logo, branding, and Chinese chassis. Clearly these are not Krell products. I was interested in the JLH amp design. Thanks.
Somebody is now selling these things without that silly Krell logo, although you can still get the Krell logo ones, too. I have not heard these, but from all accounts, they are a very good sounding- albeit low power- amplifier. They are only about 10 watts per channel, but capable of driving difficult loads. If you had speakers with, say, 95 dB / watt / 1 meter sensitivity (or more) this amp might prove quite satisfying. You know, nice old Altecs or speakers like the various Zu models, seems like this amp would suit them well. Would also serve as a handwarmer in the winter..... or place it under your desk for your cold feet.... toasty feet and good sound!
Edits: 06/25/16
Heat sink maybe a little small for class A.
Well if we assume that front and back metal plate are in good thermal contact with the main left&right heatsink maybe than overall heatsink capacity is OK ,
not counting top&bottom metal plates ,
and here is the less ugly silver painted variant :)
Regards !
__
"Art which does not have the appearance of art is true art."
- Old Roman saying -
It is interesting nobody is addressing the OP's point, which is the clearly bogus Krell badge on the front of this amplifier.
I don't think how it might sound is the point.
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