I was thinking about a way to decrease the chance of cathode stripping on my "starving student" amp by adding in a standby mode. I was considering doing this by powering the heaters at 50% nominal voltage from the 48 volt supply with a voltage divider from the supply. Is there any reason I...

I just got a pair of Sennheiser HD-280 Pros. I love them! They're comfortable, transparent, and sound nice. An obvious improvement over my Apple in-ear phones. I shortly discovered a small problem though. When using them with my computer the sound is thin, noisy, and lacks any bass. I only have...