Diamond Audio MP525 5.25" PRO Full-Range Co-Ax Horn Speakers (Pair)

The Diamond Audio MP525 is a 5.25" full-range co-ax horn speaker built for maximum efficiency and loudness — pro-audio sound that cuts through wind and engine noise on a bagger, a boat, a slingshot, or an RV. The horn-style tweeter and full-range coax design mean you get highs and mids from one speaker, no separate tweeter location required.

Why we recommend them

The MP series is Diamond Audio's high-output pro line, and the MP525 packs it into a compact 5.25" that fits where bigger speakers can't. A high-temp neodymium motor and heavy die-cast aluminum basket drive a big 101dB sensitivity, so it plays loud without a huge amp, across a wide 110Hz–18kHz range. The horn tweeter uses a replaceable diaphragm, so it's built to last and easy to service.

Fitment & install notes

Sold as a pair. Mounting depth 2.99", 4.68" mounting diameter. 12dB crossover protects the tweeter. Water-resistant (not waterproof) — great for open-air builds, but don't submerge. Pair with a pro-audio amp for full output.

Features & Specifications

• 5.25" full-range co-ax horn speakers (sold as a pair)
• Power: 150W RMS / 300W max
• Sensitivity: 101dB
• Frequency response: 110Hz–18kHz
• High-temp neodymium magnet, die-cast aluminum basket
• Horn tweeter with replaceable diaphragm, 12dB crossover
• Water-resistant — mounting depth 2.99", diameter 4.68"
• Great for baggers, boats, slingshots, side-by-sides, and RVs