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INFINITY SPEAKERS Alpha 4020
MRP: $38.87 Offer Price: $27.29
Compact in size yet powerful in performance, the Infinity Alpha 402C 4″ 2-Way Coaxial Speakers are the perfect upgrade for factory sound systems. Designed for clarity and durability, they feature a polypropylene woofer cone and PEI dome tweeter that deliver crisp highs, detailed mids, and improved overall balance—ideal for small cars and dashboards with limited space.
Description
Specifications
Here are the known technical specs:
| Spec | Value |
|---|---|
| Power Handling (RMS) | 25 Watts RMS Xcite Audio+1 |
| Peak Power Handling | 175 Watts peak Xcite Audio+1 |
| Nominal Impedance | 4 Ohms infinity-caraudio.com.au+1 |
| Sensitivity | 88 dB (2.83 V / 1 m) infinity-caraudio.com.au+2Xcite Audio+2 |
| Frequency Response | Approximately 75 Hz to 20,000 Hz infinity-caraudio.com.au+1 |
Features & Build Details
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Woofer Cone Material: Injection-molded polypropylene. This tends to offer a good balance between stiffness & weight, which helps with midbass clarity and durability. my.infinityspeakers.com+2infinity-caraudio.com.au+2
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Tweeter: PEI balanced dome tweeter (soft or polymer-type) for producing higher frequency detail. my.infinityspeakers.com+1
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Design Aesthetics: Part of the “new Infinity ID” / updated design style under the Alpha line. Looks modern. infinity-caraudio.com.au
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Build / Reliability: These speakers go through environmental testing (heat, cold, vibration, UV exposure etc.) to ensure reliability. Alpha series generally tries to offer ruggedness even at lower cost. infinity-caraudio.com.au+1
What to Expect in Real-World Performance
Strengths
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Because of modest size (4″) and reasonable sensitivity, these speakers are good for replacing small stock speakers where space is limited (like tweeter locations, small door panels, dashboards etc.).
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Good clarity in mids and highs — vocals, instruments etc. will sound noticeably better than many basic factory speakers, especially with a clean signal.
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Enough power for everyday use: 25 W RMS is not a lot, but sufficient for moderate listening if your head unit or amp can deliver good clean power. It will run without distortion at normal volumes.
Limitations
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Low bass limit is around 75 Hz — so you won’t get deep bass from these; for bass below ~70 Hz, a dedicated subwoofer will be needed if you like it or if music demands it. infinity-caraudio.com.au+1
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Because of small size and limited excursion (how much cone can move), the loudness at very low frequencies or heavy bass passages will be constrained.
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Peak power ratings (175 W) are short bursts; sustained power use well above the RMS rating might cause distortion or stress.
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Installation matters: sealing, wiring quality, mounting depth etc will affect how good these sound.
1 review for INFINITY SPEAKERS Alpha 4020
INFINITY SPEAKERS Alpha 4020
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Adapter rings included made fitting into non-standard openings quick and stress-free.