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Today's Featured Head-Fi Blog: A Japanese headfier's monologue (Sasaki)
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Yes, I have. The combined modifications (changing out the 5 capacitors and increasing the PSRR by 20dB on each channel) resulted in a more detailed amplifier. I heard a couple of echoes in one Iron Maiden song I never heard before on any system and certain details in numerous songs are new to me.
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Home: Audigy 2 ZS ---> PIMETA (Class-A Biased, AD8620AR, TREAD Regulator, Custom-built Discrete Diamond Buffer boards on L/R from PPAv2) ---> Grado SR-225
USAFA: Audigy 4 (roommate's computer) ---> DIY GB-150D-based integrated amp (stereo configuration, remote-controlled, power-on delay for output, and heavily class-A biased (3.9mA/channel) LM4562NAs used in preamp section) ---> Yamaha NS-527 (modified with Vifa 6 1/2" woofers, Panasonic film caps in crossover, and heftier internal wiring)
Ghey-C'97 (my piece-o-crap issued laptop) ---> PPAv2 (class-A biased AD8620 (2.5mA/channel), 8600uF pre-regulator, LM338 high-current regulator, 40mA/channel output bias) ---> Grado SR-225 (yes, I bring my headphones home from the Academy during leave)
USAFA: Audigy 4 (roommate's computer) ---> DIY GB-150D-based integrated amp (stereo configuration, remote-controlled, power-on delay for output, and heavily class-A biased (3.9mA/channel) LM4562NAs used in preamp section) ---> Yamaha NS-527 (modified with Vifa 6 1/2" woofers, Panasonic film caps in crossover, and heftier internal wiring)
Ghey-C'97 (my piece-o-crap issued laptop) ---> PPAv2 (class-A biased AD8620 (2.5mA/channel), 8600uF pre-regulator, LM338 high-current regulator, 40mA/channel output bias) ---> Grado SR-225 (yes, I bring my headphones home from the Academy during leave)
i was going to build the cmoy first, but i only just managed to pay zigis the other day for a cmoy pcb (i didn't want to do it on strip board ... *shudder*)
rail caps are 6.3v 1000uf panasonic fms, matched wima poly caps for c4 and ad8260/8610 opamps.
i have 2 634s on the L/R outputs and one on the ground. i've decided not to bias it into class-A to try save on batteries. overall gain is set to about 3.9 but i've kinda screwed the internal gain .... its at something like 300 .... so thats going to get changed soon =S
only niggle i have with it is ... it needs a trickle charger attached to it =p i think i'll try squeeze one of these into the case some day.
generally happy with the sound from the amp. but i've forgotten to bring my grados back from university from the weekend. =/ bummer
thanks to warren for the quick delivery!!!
got a cmoy and xp amp coming next in the portable area =)
USAFA: Audigy 4 (roommate's computer) ---> DIY GB-150D-based integrated amp (stereo configuration, remote-controlled, power-on delay for output, and heavily class-A biased (3.9mA/channel) LM4562NAs used in preamp section) ---> Yamaha NS-527 (modified with Vifa 6 1/2" woofers, Panasonic film caps in crossover, and heftier internal wiring)
Ghey-C'97 (my piece-o-crap issued laptop) ---> PPAv2 (class-A biased AD8620 (2.5mA/channel), 8600uF pre-regulator, LM338 high-current regulator, 40mA/channel output bias) ---> Grado SR-225 (yes, I bring my headphones home from the Academy during leave)
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Current Amps: SOHA and NO AMP AT ALL
Current Headphones: Grado 225,KSC 75,PX 100,YUIN PK2
Future projects:Cavelli jones(with 5687 upgrade)
Source: 4G 20G ipod, Dell computer with SB Live card,Phillips 953 dvd/cd player
Work source: Dell optiplex GX620,IPOD
Previously owned headphones: er6i,sr80,HD580 with hd650 cable,PX100,sr225,YUIN PK3,sr325i,igrados
Previously owned amps: Millett Hybrid with diamond buffer bd,Sr-71
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