I am inching towards making my own CIEMs, but in the meantime I do need some hearing protection for practicing with my band. I see these nice custom ones http://www.etymotic.com/hp/erme.html but heard they cost at least $200-$400 so would like to make some. I already have ear impressions, and am...

I have a sony amp that I have for about 5 years now, it has started having a problem where the center channel in 5.1 mode will cut out, and when it does I hear a click, like a small relay, and it will come in and out, each time I hear a click. My questions are, 1) What are relays used for in...

I just built my first Cmoy on a breadboard, and initially I am dissapointed. I am using V6's and source is an ipod, and the output is very harsh, meaning the highs are overly strong, and possibly distorted. I tried changing some resistors, but nothing helps. Any help would be greatly...

Hello, I am building my first amp, a Cmoy, and have 2 questions. 1) I want to add the bass boost, that can be switched on/off. I understand how to hook up the C/R in the feedback loop, but at first thought it seems I would need 2 switches, 1 for each channel. How can I do it with one switch...

Hello, I want to build me a PIMETA, but I have a question. The Schematics and the Text says to use Op-amp AD8620, but the parts list shows OPA2132PA. I am looking for the best value so let me know so which should I use? Thanks, CP