34mm Capsule Upgrade, Condenser Microphone Circuit Board Mod DIY [CM-2A]

Description

Condenser Microphone Amplifier Modules
Starting Level
Middle Level
High Level
CM-1A
CM-2A
CM-1XP
Condenser Microphone Amplifier Module CM-2A rev.1.0
Description
This module combines the best solutions of the RODE NT1-A and Neumann TLM-103 condenser microphone amplifiers with my design experience. It is designed for Chinese BM-700, BM-800 or similar microphone body (see the dimensions for verification).
Compatible capsule: 34mm condenser capsule  or 25mm electret (without built-in JFET). Required 48V phantom power.
Views on microphone frame is for sizing purposes only.
Features & Benefits
Ultra-low noise and very low distortion.
Transformerless JFET impedance converter (unity closed-loop gain) with bipolar output buffer.
Used only branded SMD components: matched pairs of low-noise transistors, low-noise precision thin-film resistors (±0.1% tolerance in symmetrical side), highly stable NP0 ceramic capacitors (where possible) and X7R ceramic capacitors with high AC linearity, DC blocking and filtering electrolytic capacitors by Panasonic.
Package Included
ESD-packed condenser microphone amplifier module;
XLR connector and 20cm FF46-2 wire (24AWG);
two M2.5 * 5mm countersunk screws for installing the module onto the microphone frame;
two M1.6 * 6mm screws and washers for installing a 34mm condenser capsule onto the mount.
(microphone body, capsule and capsule mount are NOT included)
If you are in doubt about anything or need more quantity, please contact me.