I'm trying to build a passive notch filter eq based on the linkwitz er4s passive eq circuit. I'd like to know if anyone here is knowledgeable with rc filters and notch filters and that sort of thing and might be able to help me design one and answer some questions for me. Please chime in! :-)  ...

Are there any meets in the new england area, maybe close to new hampshire somewhere?

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I'm looking for a new portable "mp3" player that meets a few requirements.   - Large storage capacity ( >= 128gb) - Excellent audio quality (at least as good as an ipod touch 5g or sansa clip+) - Line out for better quality is o.k. if necessary, as I have a portable amp - Not too large...

I wanted to ask a few questions about getting custom tips for my ER-4S and have a poll as well.   First, would everyone agree that you will achieve at "least" the same sound quality as the triple flange tips when you get customs?  I'd like to stick with the ACS/Microsonics customs as those...

I have an apogee duet (firewire) that sounds excellent with my new pfe232 IEMs.  My ipod touch isn't "as" good, primarily, I believe, because of the impedance being lower.  This causes a slight treble boost around 10khz.  The duet also has slightly better overall detail/smoothness/tightness/etc...

This thread is basically a list of songs from a variety of genres that I have listened to with comments on my observations of the sound properties of each.  I have listened to each song from beginning to end and also compared small sections of interest to get a full engrossing feel for each song...

I'm looking for a new pair of in ear headphones for general listening as well as studio mixing (i live in an apartment, so I can't use my studio monitors any more).   My goal is to get a pair of headphones at least as good as my current pair but with a little more "air" or brightness.  ...