Documentation for Dan's Blackbox Project #2 - Ambisonic Demo - Experimental 2

All of the capsule gain jumpers are available by removing the top plate and changing the jumpers with a pair of very long nosed pliars. I am hoping that the system now has enough dynamic range so that a single gain setting will work for all, or the vast majority, of recording situations.

The battery compartment is a seperate, yet identical, box. Should I get the time to work on the phantom power issue and find a solution, I can just remove the compartment and use the undrilled half of the battery box to replace the drilled half of the pc board box. Simple change. The battery box only contains two 9-volt batteries, a power switch, and LED power indicator.

Another stroke of luck is that in my well-stocked junk supply, I had an adapter from a 5/8-inch microphone stand to a male 3/8-inch stud. I mounted this adapter to the end plate of the pcb box so I can mount the microphone on standard mic stands. Also on the same end plate is where the quad cable is attached by means of a rubber grommet which is part of an adapter intended for transitioning rubber cable to 3/4-inch electrical conduit.

By attaching the output cable directly to the box, I saved the space required for 4 connectors; I had neither the space on the end plate nor the internal space in the box for them. And with twenty feet of quad cable attached, I can use a tall mic stand (14 feet) and still have enough cable to position my recording rig box nearby without having to add extention cables.

I still have dynamic range and frequency response tests to run on the Experimental 2, but the initial recordings sound very good.