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Posts by alphaman

Does the C4  feature variable vol. for LO?   I've had the Colorfly CK4 DAP for a few years. It has VARIABLE vol. for LO. I think vol. is controlled INSIDE the Cirrus DAC chip.    I used to operate LO with vol. at max. That's what's normally suggested. Then, I began experimenting and found that SQ improved SIGNIFICANTLY (for most subjective perceptions) when I reduced LO vol. I finally settled on about 2/3 (66%). That forces me to use the FULL range of my external...
Are you referring to the standard SSMH? In #6561, Goobley brought in the MiniMax (with its CCS tweak) into the discussion . So that's what I was kinda comparing the Borbely to.     IAC ... your point-by-point contrasts are good. However, I was largely referring to semantics and nomenclature used to generically describe BOTH amps, which is why I used quotations in #6567's remark: The amps ain't THAT different in that both are "vacuum tube and discrete solid state hybrid...
Sorry for just getting around to replying to your reply ;) The amps ain't THAT different in that both are "vacuum tube and discrete solid state hybrid headphone amplifier[s]" About that diode ... my bad on stating that being the ONLY part needed for a drop-in type CCS upgrade for the MSSH -- and YOUR bad for not noticing that :) Specifically ... if you look at the  the Borbely ckt you'll note two addit. transistors and three Rs  (Q4, Q5,R11/12/13 )., sorta similar to...
General comments about mark2410's review style:   Pros: Good product selection (ie., when compared to plethora of new junk released, mark2410 grabs the real goodies) Good photography   Cons: No bulleted intro/summary -- important info like price, main features, dimensions, and manuf. web links should be FIRST -- in bullets -- and later expanded in that order later (see 1, 2 below) Too long (see 1, 2 below) Not written/stylized for the web...
Oh ... okay, I finally got iRiver's branding strategy.... Barbie Astell and Ken Kern .... toys!!    Looks like Barbie doll never got hitched ... even after all these years ... marriage is so overrated, anyway.
I haven't seen a schematic for the Bottlehead Crack .And while that is a different style of tube amp than MSSH, I did note that Bottlehead offers a CCS upgrade called "Speedball" for the 12AU7 section: http://www.bottlehead.com/store.php/products/speedball-upgrade-for-crack-amplifier   Will it work with the 12AU7 SSMH variant?   EDIT: Here's the C4S Camille Cascode Constant Current Source kit: http://www.bottlehead.com/et/adobespc/C4S/c4s_kit.htm ... it's an LED-based CCS...
I went to the iriver wiki page as well as the official iriver web site and can't find any info on who "Astell" and "Kern" are? Are they project engineers? Or is it a "brand name" ... like Lords and Taylor? Anyone know? Thx!!
How hard is this device to get into? For Apple and similar "idevices", there is $10 kit you can get to easily pry open w/o any damage to unit. It's important to be able to get into one of these units according to Bear Grylls and Survivor man and all those "reality" shows". Reason: you may need the battery inside to, say, start a fire if there is some sort of "emergency" ;)
Cool, but in order to conduct any useful "engineering analysis" we need properly-lit and focused macro photography, preferably in multiple sections, and (as I noted before) on BOTH sides of the board. Also, that daughter board needs to be lifted to reveal the covered section of main board underneath.   Come on folks ... take that cover off, focus your iPhones, and snap ;)   HINT: Here's example of GOOD internal photography: Image link (full...
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