Looking at my blog statistics I noticed some visits on my now old and very dead Cmoy project. Out of respect for the people who are visiting I wanna give an update on my electronics projects. Since I built that Cmoy headphone amplifier and crossfeed my life changed quite a bit, I don't have the … Continue reading Cmoy headphone amp update.
It came to my attention that Pow Chu Moy the man behind Head-Wize and the Cmoy headphone amplifier passed away in Reno Nevada (US) on February 12, 2016. Kevin Gilmore was the bearer of the sad news in the headphone community Head-Fi. I never had the pleasure of talking with Chu Moy, mostly because his … Continue reading The hero of DIY audio, Pow Chu Moy.
Sometimes I really hate living in Portugal, If I want to buy some JRC4556 for my low impedance headphone amp I must pay 18€ of shipment doesn’t matter if it’s 1 or 30 op-amps, if the purchase doesn’t go above 65€ the shipment must be paid. I get people must get paid to make my shipment but 18€ … Continue reading JRC4556, shipment prices and other rants.
Some audiophile remove dc filtering caps from their source devices saying that they degrade the sound of their setups, usually I read stuff like electrolytic caps suck, bass gets cut off, my (insert device name here) does not have any dc problems, my preamp already has filtering and the list goes on. My questions to … Continue reading Some thoughts about AC coupling.
Solve for -3 db Frequency Solve for Capacitor Value Load Input Impedance (Ohms): 32 Capacitor Value (µF): 680 -3db Frequency (Hz):7.31 Optimal low frequency response (Hz):73.14 After some “study” I went for the 680uf caps. 32 Ohms are the base impedance of my grados. People say electrolytics color the sound, I must be deaf because I … Continue reading My DC coupling caps.