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Checking out an M^3 as a pre-amplifier with a cheap Sony DVD/CD player, a pair of *really* cheap JBL speakers (just in case, wouldn't want to fry the B&Ws), and the power amp section of an old Denon receiver.
Makes the JBLs sound like they cost.... oh $100 a pair.
from left to right
1. my second try, a smEaton with crossfeed in an USB-harddrive-case
2. my first try, a RA-1-clone in the wooden box
3. a simple switch for comparing the amps (here used with a Creek OBH21 SE)
Actually I wait for some parts to complete my 4th project, a PIMETA
on this pictures the cables are just plugged for testing.
They are replaced by better ones which are placed in a better looking way and have been soldered now.
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 have altered completely unnecessary device Musical Fidelity X-10D in system in the amplifier for headphones.
The applied military transistors allow to work to the circuit without negative feedback in a class A.
The circuit is thought up by Igor Semyninym from the city of Izhevsk.
It emitter the repeater with incredibly pure and transparent sound.
What say?
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)
M^3 -- Gee, do I really need a case?
Linear Mode
