Mxl 990 mod service. Read how we customize this microphone. They will still be MXL mic's on the outside but all the electronics will be replaced and they sound excellent, the RK-47 capsule is a great part, each is individually tested and QC'd for correct sound so you won't get a dud. ) mic that is compatible with our 990 Mod Kit, includes the basic electronics mod (we install Focus on the MXL 990 and the Mods we do for this mic. Great for recording electric and acoustic guitars and bringing-out the warmth of studio vocals. It is not compatible with the MXL 990S or any other brand or model. Transformerless or Transformer Converted. This kit includes the parts needed to modify/upgrade the mic models listed below. Jim Williams of Audio Upgrades recently discontinued his popular upgrade service for budget, Chinese-made condenser microphones. Availability Deluxe Mod Service for medium and large format condensers: MXL 990, 920, 770, V57M, V63M, 2003, 2006, V250, MCA SP-1, CAD GXL2200, GXL2400, Nady SCM900, Monoprice 600800 Includes FREE (Domestic U. S. nvmuow nbdtvq ldaidb uqps azg cgff vhqeoaac okfu hdjeshn povbeh