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Posts by milosz

Musical Fidelity XCAN V3 headphone amplifier, modifications include: Removed input coupling electrolytics, replaced garden-variety rectifier diodes with fast/ soft-recovery HEXFREDs, replaced low-quality electrolytic filter caps with low-ESR high-quality Panasonic electrolytics, and replaced polar electrolytic output coupling capacitors with nonpolarized Nichicon Muse ES-type audio-grade capacitors- going from stock value of 440 uF to 1,000 uF for lower source impedance /...
The two chassis are from eBay, but I machined the front panels to my design, and cut ventilation slots in the top and bottom panels     Here's a chassis before machining.  Very good quality for the money.   Here's an ebay item for one of these chassis (note, this ebay link will eventually die...)  http://www.ebay.com/itm/Aluminum-chassis-Power-amplifier-Enclosure-DAC-case-preamp-PSU-Box-DIY-AUDIO-/130953831714
NEW BUILD   Compact 2-chassis ß22 / σ22 2-board amp with built in DAC  (note: Genuine AMB / Glass Audio parts)   DAC is Curryman - ES9023 DAC with discrete FET output buffers ( https://www.minidsp.com/products/minidspkits/curryman-i2s-dac ) DAC has separate power supplies USB reciver is Amanero ( https://docs.google.com/viewer?url=http://www.amanero.com/drivers/combo384-D.pdf ) USB receiver and DAC are in a copper shielded subchassis inside the amp. Switch selects...
FYI this is for sale.... send PM
Yeah that Lumberg looks nice and I bet it's well made but it's 3.5 mm not 1/4"  my HE-6, LCD-2 and HD-800's won't plug into a 3.5 MM jack and using an adapter kind of defeats the purpose.   Maybe I'll have to start manufacturing one myself.  I have in mind one that has a larger contact area, and that has a lever-operated clamping mechanism instead of just a push-fit, the whole business machined from Teflon and 305 stainless, with gold plated OFC copper contacts.....$150...
Yes.
Built this amp using http://electronics-diy.com/zen-headphone-amplifier.php   Uses 1,000 uF motor run film caps for output coupling (switchable with 1,000 uF Elna Silmic II electrolytic cap for comparison), SIlmic II caps in circuit, IXYS FRED diode bridges, separate transformers / diodes / filters for left and right channels, Alps blue velvet pot, solid metal Switchcraft 1/4" jack, silver / teflon wiring, etc etc.   Signal path consists of essentially only ONE active...
Here's another CAD image.   The 3-circuit ring-tip-sleeve plug shown in the picture above worries me, can't have polarizing voltage on something like that. Are these self-energizing, rectifying audio to provide the bias?  ESP-6 tried that.... not many sold....very heavy if you put transformers in the earcups....   The little coily wires at the top going from one earcup to the other worry me, too, seems like those would eventually fatigue and open up.   Also, these...
 No, but pointing to a 170 dB dynamic range and claiming it makes the DAC audibly superior to typical ~120 dB DACs is a marketing lie.  You said that having a 170 dB dynamic range prevents clipping on orchestral peaks, so you're saying that orchestral peaks exist that are beyond the 110~120 dB dynamic range of a typical good DAC. Can you please tell me which orchestra is capable of such SPL's? If you need 170 dB of dynamic range to reproduce the peaks, I'd like to point...
Interesting to see a DAC claiming over 170 dB dynamic range.   ( http://www.msbtech.com/products/dacSelect.php )   A typical symphony hall has a background noise level between 35 and 50 dB.  5 meters in front of a typical symphony orchestra, max SPL is almost never above 100 dB.  And, of course, further back, say at row 25, it would be lower.   So if a symphony has a dynamic range of 60 to 50 dB, how exactly does a 170 dB dynamic range add to the reproduction of...
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