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Infinity
Infinity Reference 551a Mono subwoofer amplifier — 550 watts RMS x 1 at 2 ohms
$99.99
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Infinity Reference 551a
Mono subwoofer amplifier — 550 watts RMS x 1 at 2 ohms
Power delivered in style
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.
Reference 551a inputs and control panel
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
What's in the box:
Infinity Reference 551a owner's manual
- 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
30-Day Return Policy
At Fuego Bass Shop, we want you to be fully satisfied with your purchase. You can return most products within 30 days of delivery for a refund or exchange.
Please note: Any returns with physical damage or missing original packaging may incur a deduction.
Restocking Fee: A 15% restocking fee will be deducted from your refund to cover handling and restocking.
Refunds will be processed to your original payment method within 5–7 business days after we receive and inspect the returned item.
We ship within the United States (excludes recipients in Alaska, Hawaii, Puerto Rico, U.S. Virgin Islands, and Guam).
At Fuego Bass Shop, we understand the thrill of receiving your car audio equipment quickly. Our shipping process is designed to ensure your order arrives safe, fast, and ready to pump bass.
Most orders are processed within 1–2 business days. Standard shipping usually takes 3–7 business days depending on your location. Expedited shipping is available for select items during checkout.
Once your order is shipped, you will receive a tracking number via email so you can follow your gear every step of the way. Our packaging is designed to protect high-performance audio equipment from bumps, vibrations, and shocks during transit.
Please note: Delivery times may vary during holidays, promotions, or due to carrier delays. We highly recommend verifying your shipping address before completing checkout to avoid delays.
If you have any questions about your shipment or need assistance, our support team is ready to help. We want your experience with Fuego Bass Shop to be as powerful and smooth as our bass systems!
