AKG K450. AKG Acoustics K 701 headphones. Oh mama, was I ever excited when I heard rumors of the existence of AKG's K 701! If you're among the audiophiles who sneer at those of us who like headphones, you're probably rolling your eyes and thinking I must lack a rich inner life. But hold on there, Skippy—some of us use those cans in our prosumer studios, in recording sessions, and even in barn-burning late-night critical listening sessions where we employ ancillary equipment that would beggar your jaded high-end sensibilities. We're not talking about the three-buck, upchuck disposable 'phones your friendly flight attendant flogs before your in-flight main feature. We're talking about serious tools that can reveal a flea fart in a cathedral. Well, some of us are. Me, I'm just a headphone geek, so news that AKG was going to launch a flagship dynamic headphone had me all aquiver with anticipation.
Rumor had it that the K 701s would come in closer to $400, which they did—$450 and frequently discounted. Take the cabling, for example. Yamaha RH5-ma, best sleeper of 2009? Well I wrote another somewhat lengthy post and somehow it ain't here. Anyway... Notes and such... WARNiNG: Be careful with the stubs of the forks that hold the cups. I broke one off and have to superglue it back now and hope that works. Otherwise I'll have to go into serious engineering mode...
I tried removing the foam that is over the drivers, between them and my ears. Sound is still good to me after immediate excitement is subsiding. I am going to make mine single entry and install a 3.5mm jack so I can swap interconnects. HeadWize Library - Projects. Sections: DIY Tutorials and Showcase Headphone Amplifiers - Discrete Solid State Headphone Amplifiers - Opamp Solid State Headphone Amplifiers - Vacuum Tubes Headphone Amplifiers - Hybrids (Solid State/Vacuum Tube) Headphone and Earphone Projects Musicians and Audio Professionals PC Applications Signal Processors Greg J.
You can't get much simpler than this classic class-A MOSFET driver. Kevin Gilmore Designed and built for the author's Stax Omega II headphones, this amplifier can be used with other Stax models. Richard Murdey This amplifier is based on the MOSFET headphone driver by Greg Szekeres . A high-current output amplifier for low-impedance dynamic headphones such as the Grados.
Benny Jørgensen A discrete all-bipolar, zero feedback class A amplifier with a new opamp-based servo. Marcello Pellerano A single-ended, class A MOSFET headphone amplifier with an active current source that results in increased efficiency (50%) and lower distortion. Rohit Balkishan Kurt Strain Eric Barbour HeadWize. Head-Fi.org - Headphone forums and reviews for audiophiles.