Shure Free Shipping Lowest Price Promise $0.00 Tax Collected Outside California Shure RPM626 Inline Microphone Preamp for Beta 91/98 and Other Shure Mics - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. In Stock & Ready to Ship! Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart Tweet Pin it Copy URL This product's URL has been copied to your clipboard. Brand New ConditionMore InfoThis product is in the box as received from the manufacturer and comes with the original warranty. Shure's RPM26 is an inline microphone preamplifier for use with their WBH53, Beta 53, Beta 91, Beta 98, MC50, and MC51 microphones.