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Infinity Alpha 1302A 2-channel amplifier
MRP: $123.37 Offer Price: $86.44
Power your car audio system with the Infinity Alpha 2802A, a compact yet powerful 2-channel amplifier built for clean, dynamic sound. With 65 watts RMS per channel and flexible bridging options, it’s ideal for upgrading front or rear speakers—or driving a subwoofer in bridged mode. Experience the clarity and reliability that Infinity is known for.
Description
Key Specifications
Here are the main specs gathered from multiple sources:
| Parameter | Value |
|---|---|
| Channels | 2 channels (stereo) roadentertainment.com+1 |
| RMS Power Output | 65 W × 2 at 4 Ω per channel roadentertainment.com+1 |
| RMS at 2 Ω | 85 W × 2 at 2 Ω per channel roadentertainment.com+1 |
| Bridged Power (4 Ω bridged) | 170 W × 1 when both channels are bridged to drive a single load roadentertainment.com |
| Peak Power | Up to 500 W peak (bridged at 4 Ω) roadentertainment.com+1 |
| Frequency Response | 10 Hz – 45 kHz roadentertainment.com+1 |
| Signal-to-Noise Ratio (S/N) | ~ 75 dB roadentertainment.com |
| High-Pass / Low-Pass Crossover Filters | Yes, adjustable HP/LP filters included. roadentertainment.com+1 |
| Operating Voltage | 9 V – 16 V (typical automotive range) roadentertainment.com |
| Fuse Rating | 30 A (single fuse) roadentertainment.com |
| Recommended Wire Gauge | 8 AWG for power lines. roadentertainment.com |
| Dimensions | Approximately 10-1/4 in × 2-3/16 in × 8-1/8 in (~ 26 × 5.6 × 20.6 cm) roadentertainment.com |
| Weight | ~ 2.09 kg roadentertainment.com |
Features & Design Highlights
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Class AB design gives better mis-frequencies and sound quality, at the cost of some more heat and less efficiency compared to Class D amps.
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Bridging capability – you can use the amp in stereo (2× channels) or bridge both channels to get more power to a sub or single speaker. Useful flexibility.
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Crossover filtering – having adjustable HP/LP crossovers helps you fine-tune which frequencies the amp sends to your speakers or subwoofer, allowing better integration and reducing distortion.
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Compact size for its power class – the physical dimensions are reasonably small, so it can fit in many car amplifier mounting spots.
What to Expect in Real-World Use
Strengths
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For small to medium speakers (door speakers, coaxials), 65 W × 2 RMS is decent. Will give noticeable improvement over weak factory head units.
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If you’re using one channel or bridging, in bridged mode you can get decent sub output (170 W bridged), enough for moderate bass in a car if the enclosure and power are good.
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The wide frequency response (down to ~10 Hz, though in practice output below ~30-40 Hz may be limited by speaker/enclosure) gives you good fidelity.
Limitations / Things to Be Careful Of
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The power numbers are modest for very demanding setups. If you have large subs or speakers that need a lot of power, this may not be enough.
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Heat: AB amps are less efficient, so under heavy use (driving low impedances, high gain) the amp may run hot. Good ventilation and proper wiring are essential.
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Bridged mode increases current draw; ensure your power wire, battery, and ground are capable. Undersized wires or weak grounds will degrade performance or cause voltage drop.
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Noise floor / S/N 75 dB is okay, but not “audiophile”-quiet. At low volumes, you may hear some noise (depending on system).
Suitability & Matching
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Best paired with mid-power speakers: 4-6.5″ coaxials or component sets, or maybe small woofers/subs in bridged mode.
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For a full car audio setup: front + rear speakers + a sub, this amp may suffice for mid-range speakers, but you’d need a separate sub amp or a more powerful amp for serious bass.
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Wiring: use good quality wire (8 AWG for power is recommended), decent gauge for speaker wires, secure mounting and good insulation.
1 review for Infinity Alpha 1302A 2-channel amplifier
Infinity Alpha 1302A 2-channel amplifier
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“Excellent upgrade for my door speakers—volume is cleaner and more dynamic than stock head unit.”