Description
The Shure RPM628 is an in-line preamplifier designed for use with SM90A, SM91A, and SM98A microphones. It enhances microphone performance by boosting resistance to RF (Radio Frequency) interference, ensuring clean and clear audio signals. Built for professional audio applications, this preamplifier helps maintain signal integrity, particularly in environments with potential RF disturbances. Compact and reliable, the RPM628 is a critical addition for those looking to optimize their microphone setup and audio quality.
Product Specification:
Compatibility: SM90A, SM91A, and SM98A Microphones
Function: In-line preamplifier
RF Protection: Enhanced resistance to RF interference
Shipping Weight: 0.5 lbs.
Shipping Dimensions: 6 x 8 x 2 inches
Financing Options
Hassle-Free Financing Available
Get the gear you need now and pay over time. Perfect for working DJs, artists, and sound pros who need pro-grade speakers, lighting, and cases to stay competitive.
- Shop Pay & Afterpay for instant financing right at checkout
- Acima, Synchrony, Progressive & Snap lease-to-own and financing options
- Fast approvals so you buy today and pay monthly
Military & First Responder Discounts
We're proud to support those who serve. Active-duty military, veterans, and first responders qualify for a special discount on your gear. See our Military Discount details here and how to redeem.

