Infinity REF-551a

About the Infinity Reference 551a

Infinity’s Reference 551a mono amp will add some bass muscle to your music without breaking a sweat, and it’ll look good doing it. This potent powerhouse will send up to 550 watts RMS to your subwoofer, and its Class D design ensures the amp’s high output will put minimal strain your vehicle’s electrical system.

Works in almost any vehicle

Speaker-level inputs allow this amplifier to work in almost any system, even if you’re hanging on to your factory radio. You can use the low-pass filter and variable bass boost to maximize the performance of your subwoofer and enclosure, while a phase switch ensures that the bass will blend well with your full-range speakers.

What’s in the box:

• Monoblock amplifier with two 30A ATO fuses installed
• Two spare 30A ATO fuses
• 2 Speaker wire-to-RCA adapters
• 4 Self-tapping screws (length=2.25″)
• Quick Connect Guide
• 2 Infinity decals

Product highlights:

• mono subwoofer amplifier
• 370 watts RMS x 1 at 4 ohms (550 watts RMS x 1 at 2 ohms)
• Class D amp technology
• variable low-pass filter (32-320 Hz, 12 dB/octave)
• variable bass boost (0-9 dB at 45 Hz)
• phase switch (0, 180 degrees)
• preamp and speaker-level inputs
• fuse rating: 30A x 2
• 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
• 9-3/8″W x 2-1/4″H x 7-5/16″D