i've been on a kick checking out power amps to run my subwoofers. so i've read up on a few things and here are some of the amps i'm considering to run 2 or 4 cheap subwoofers, each at an 8-ohm load.

Crown XTi4000
Crest VS1500 (if i use 4 subs i'll need 2 of these)
QSC RMX series

Hey guys diden't know where to post this so feel free to move it.

500 series preamps are a pretty popular item for discussion around here. I thought I would start a thread on the racks that hold these units. I'm going to give it a go as a first shot and as new or better information comes in I will edit this first post to try and make a pretty comprehensive list of options.

I have an old Groove Tubes 6TM mic with the PS1 Vacuum tube power supply. The mic end looks like the Groove Tubes EC7 cable in that it has a 7-pin connector. The power supply end looks like an 9-pin ADAT sync connector almost like a vga computer display connector. I am in need of the pin out configuration so that I can build one or a source to purchase one.

I apologize in advance for my lack of technical knowledge, I will try my best :)

We have a old 12 Channel Yorkville mixer that runs 2 self powered Mackie Speakers in a Worship environment.

Right now, there is a delay switch wired in so that the mixer turns on first, then a half second later, the powered Mackie Speakers.

What are the benefits of relocating the power supply from inside a piece of gear and into it's own external box? Electrical interference reduction maybe? I've notice a number of really high-end preamps having this feature.

Im stuck again, i just bought a new sub to go with my klipsch speakers for my mixing station.
Speakers=klipsch wf-35's
Sub=tannoy revolution sub 1001
Power amp=crown 202 (no sub out).

The 1 month old APC backup unit employed on my studio failed twice today, once last week. Yes there are shoddy power issues in the building. We have multiple breakers in our sub-board but haven't popped. These issues are for the electrician.

I Have a M-audio Sputnik microphone, but the problem is, that i don't have a power supply for it, which is a big problem because it is a 7-pin multi-pattern large diaphragm vacuum tube condense microphone, and there is no way to get it I live in Czech republic and here it's impossible to order it.

I am trying to improve my 200VDC power supply by making a simple linear regulator. nothing is ever simple...

http://en.wikipedia.org/wiki/Linear_regulator