Alpine MRP-M1000
The Alpine MRP-M1000 is a Class D mono subwoofer amplifier, part of Alpine's V-Power line. It was sold alongside the lower-rated MRP-M500, and the two share a single owner's manual. Alpine positioned it as an older version of the later S-A60M. It's a one-channel amp with a stereo input and monaural output, rated at 600 watts RMS into 4 ohms and 1,000 watts RMS into 2 ohms. The service manual confirms those figures at 1.0% THD at 14.4V, measured at both 20Hz and 100Hz.
The manufacturer documentation goes well beyond the headline numbers, which is unusual for a car amp of this class. The service manual lists a 94dB S/N ratio, 20k-ohm RCA input impedance (39.6k-ohm on speaker-level input), and a 25A peak fuse requirement on each of four battery-line fuses. No-signal current draw is 2.7A, and it climbs to 170A at full tilt into 2 ohms. The amp runs from a 14.4V nominal supply (11-16V range). Internally it's a PWM design built around a TMP87C847U microcontroller that handles protection and thermal monitoring. An IRF3205-based DC-DC converter stage feeds ±46V rails. The block diagram shows a subsonic filter, gain amp, bass EQ, low-pass filter, and a reverse buffer ahead of the PWM driver. That matches the marketing copy, which talks about a variable bass boost and a low-pass filter controlling what reaches the subs.
Little is documented about production years or original MSRP. Period retail listings put it around $400-$450, and a forum owner recalled buying a Best Buy display unit for under $200. On the used market they surface cheaply, as little as $40-$65 and often scratched, though new-in-box examples with manuals still turn up. The amp's reputation is mixed. Owner reports describe failures tied to incorrect impedance matching (running an 8-ohm sub, for instance). At least one account describes a unit that only produced sound with the RCA ground strapped to chassis ground. A former owner on a Russian car-audio forum warned it might not meet expectations. These amps produce a lot of heat, so the service manual's cautions about the heatsink, and about never joining speaker leads to chassis ground, are worth following.
Known Specifications
- Class D mono (1-channel) subwoofer amplifier
- Power output: 600W RMS × 1 @ 4 ohms; 1,000W RMS × 1 @ 2 ohms (1.0% THD, 14.4V)
- S/N ratio: 94dB
- Input impedance: RCA 20k ohms; speaker-level 39.6k ohms
- Fusing: 25A peak × 4 (battery line)
- Power source: DC 14.4V (11–16V)
- Stereo input, monaural output; one set of speaker outputs
- Low-pass filter and variable bass boost
- Sold alongside the MRP-M500; shares its owner's manual
Similar items on eBay
No exact Alpine MRP M1000 listings are live right now — these searches show current Alpine and similar vintage audio gear on eBay:
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.