#Diy 500 series chassis full#
#Diy 500 series chassis pro#
#Diy 500 series chassis plus#

#Diy 500 series chassis full#

Before that full kits will be prohibitively expensive as you end up paying 300-400 EUR / USD just for the power supply, but the supply will power two full rack rows. I'm super happy that I found an affordable solution for cleaning up power in my studio, and that I've rendered two pairs of great sounding preamps more likely to be used on sessions from now on.For 2 full rack rows or more of modules, the DIY 51x option from silent:arts in EU / CAPI in the USA starts making sense. Once I had the circuit tested and made up, I found I use them all over the place in my DIY builds and in my studio.' I like that the DC Power Box can be adapted to many other devices or DIY projects, and Dan's simple, cheap DC Filtering PCB offers a 'raw' version of the Box that one can use in other formats and even load with parts already sourced. After dropping the files into iZotope RX 6 I was able to 'see' the true reduction on these certain preamps, and it turned out to be around 12 dB quieter enough to drop the hum below the listening threshold on tracks when recording.Дan says, 'I designed the DC Power Box out of my own need.

The other three preamps remained the same if there had been hiss there was still hiss, but in all cases none of them had exhibited audible signs of AC hum before or after.

#Diy 500 series chassis plus#

Listening, I could hear less of the low end hum (120 Hz, mostly) on these preamps, plus a noticeable reduction in hiss. After zooming in on the waveforms, I could tell that visually two of the preamps showed a reduction of some sort of noise. After installing these boxes, I recorded the outputs again.

#Diy 500 series chassis pro#

First though, I turned up all the inputs from all my mic preamp pairs and recorded the resulting hiss and hum into Pro Tools. A quick order to Redco Audio solved that problem, and a week later I was plugging the DC Power Boxes in. I could not even find longer cables for this, like one might need for a tube mic. Now is the time to note that basically no one sells premade, 3-foot, 5-pin XLR cables out there (watch out for DMX cables as I don't believe they will work for this). Then I realized I had no 5-pin XLR cables to jumper from the DC Power Box to the 500 rack's power input! Oops. This looked promising! I purchased direct from Dan and quickly received two little black boxes with 5-pin XLR ins and outs. The person behind this, Dan Deurloo, runs Collective Cases, supplying custom cases (and much more) to DIY audio builders. I considered dumping the two 10-space racks I'd already purchased and getting an overbuilt rack with better power, but my next thought was, 'Why couldn't there be a power filtering box that installs between the supply and the rack to clean some of the noise and hash from the switching power supply?' I asked a friend to build one for me but I could sense his reticence, and, being a great designer, I knew he'd rather rebuild the entire unit from the top down вЂ“ something he probably didn't have the time for and I didn't have the budget for! After multiple internet searches, I found an old thread on a forum somewhere that linked to a manufacturer of a passive 'inline box to clean up and filter switching and linear power supplies.' Amazingly the DC Power Box was presented as being ready for many brands of 500 Series racks, even mentioning the brand I had. What I found was that of the five different 500 Series preamp types I owned, two of them were audibly noisy, causing me to not use the units. This said, many 500 Series racks use switching power supplies, and with good design implementation they will work properly. But linear power is (usually) substantially cleaner and has better transient response, making linear generally better for audio use. As you may know, switching power supplies are cheaper to source or build and are more efficient than linear power supplies. I deduced right away that the problem was the inline switching power supply feeding my rack.

Not long after I finally made the plunge into acquiring a 500 Series rack and some modules, I noticed audible noise coming through some of the mic preamps in my rack.