I just got my molded earplugs that accept the Etymotic musicians filters. I have been wearing them all day while cutting sound effects for a TV show on the CW. Early in the morning I set my monitors to the standard 82db for TV stuck in the plugs and brought the monitors up to around 105db. After...

I couldn't connect to their website, their phone is disconnected, and I drove by where stereophile said their HQ was and found nothing. Does anyone know if they moved or are they out for good? This would be bad, their gear was quite nice and very reasonable. Milo

Here is the schematic that I generated for a single channel balanced preamp/headamp. I have two questions. 1. Is the section in red necessary? I think it is not, but I want to make sure. 2. If all Rf's are equal then the amp has a gain of 2, which works for me right now. If that is the...

I am looking to build a truly balanced (unbalanced in to balanced xlr out) headamp/preamp. Cost is an object, I am happy to use opamps, discrete is fine too. Suggestions? Milo

I recently acquired two Alesis amplifiers. One is a standard instrument amplifier the RA-100, its pretty basic, analogue volume control, separate volume control per channel. It pushes 100w per channel. The other is really a budget priced sound reinforcement amplifier, can push 640w when biamped...

I have a transformer with a dual secondary which runs at 8.5V. This is the powersupply I designed for it. Any suggestions? Do I need the filter resistor? Thanks for your help! Milo

Specifically, what is the 9pin on a Noval tube? Do you ground it. Also the tab in the center of the socket is for grounding, correct? Thanks, Milo

How do I implement the third wire (earth) on a power supply? Do I just use the Negitive as a ground and not connect the "grounds" to the earth? Also I need to calculate for a fuse but I read somewhere that you should both protect the AC end and the DC end. How do I calculate for the DC end...

? well thats the question. Thanks Milo

I am interested in it because it is so compact but I have yet to hear a non-marketing review of the product. Anyone Head-fiers listen to it, and through what? thanks. Milo

Could you insert a 12AU7 for tube 1 in the Morgan Jones amp wihout changing the schematic at all? Milo

Id like to start a gallery of RCA and Mini plugs because its sort of a mystery when you buy these plugs what they look like on the inside. If anyone would like to contribute photos please send them to my email _email_jmilotrian@cox.net _email_ (remove the _email_). Please include...

I built a passive preamplifier which contains switching and vloume controls. I am using it to send a signal to two powered speakers, but their runs are getting longer than I had anticipated so the interconnects are humming (they are unbalenced) How do I crate a balenced signal? I know that...

Does anyone know where I can buy USB and Firewire tips/ends/connectors? Not cables. Thanks Milo

This is my first try at actually making something up so don't kill me for any stupid mistakes i might have made , but I am interested in everyones thoughts. Its a loop with a complementary symmetrical Class AB emitter follower instead of the typical buffer. Thanks for your help and...

should rotary switches for a passive or active preamp (for source selecting purposes) be non-shorting or shorting? Thanks, Milo

I recently came across a place in Rockvill MD that I thought you all would be interested in. It is a wood working shop that has tools and exotic woods. Its setup like a club where you can become a member, get discounts, and use the shop/tools. They also provide classes for those wanting to get...

Well I just got a pair of these for a small studio and...damn. These little guys sound really good. They have great bass for such small drivers and they are really really clean sounding. Headroom is nice, imaging could be better but its not supposed to be. All in all I really like these. They...

I know that there are better places to look for this but I cant find them, and I know its totally off subject but I figured there was someone out here that would know. I wrote a very simple script to run in the terminal of OSX and I want to make a button for it that I can put on the Dock (ok...

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2573955480 For $40.00 including shipping even if its a paper weight it is worth it. However are there any opinions on this scope. Did i just buy a dud? I havent ever impulsed on ebay but I guess there is a first time for everything. PS I found a...

So has anyone tried using a 12v rechargable drill battery for a headphone amp. They have good long life and they are easily rechargable many times. Plus most DIYers have them so it might be a usefull side item. Milo

edit: sorry didnt see the post that explains this. milo

I recently stopped by rat shack and found a few interesting batteries. Most notibly is the 12v alkaline battery for a "keless entry system" 23-279 which in a pack of 2 costs $2.99. Its a little over an inch long and 1/4 inch wide making it extreamly small and seemingly quite usuable for...

I just built a basic rail splitter powersupply for a 9v battery (2 47k resistors, 2 420uf caps) and I am getting a significant difference in voltages in respect to the ground, some times as much as .8 volts. I switched to a small wallwart added two 2200uf caps and one 6800uf cap from the...

i have recently scavenged some computer power supplies and I am trying to figure out what the bridge Diodes are rated for. Is there a way to identify this? Their labels seem useless by I wouldnt know. Also is there any way to find out if they are high speed soft recovery diodes? thanks milo