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Infinity Primus 1270 – 12” Subwoofer | 300W RMS / 1200W Peak | Deep Bass & Durable Build
MRP: €131.88 Offer Price: €92.39
Experience powerful and distortion-free bass with the Infinity Primus 1270 12-inch Subwoofer. Built for music lovers who crave depth and clarity, it delivers 300W RMS (1200W peak) power with a 4-ohm impedance. The polypropylene cone, rubber surround, and stamped steel frame ensure long-lasting performance and accurate low-frequency response.
Description
Key Specifications
| Spec | Value |
|---|---|
| Impedance | 4 ohms nominal Crutchfield+2my.infinityspeakers.com+2 |
| RMS Power Handling | 300 Watts Crutchfield+2my.infinityspeakers.com+2 |
| Peak Power Handling | 1,200 Watts peak Crutchfield+2Audio Express+2 |
| Sensitivity | 91 dB (measured at 2.83 V, 1 m) Crutchfield+2my.infinityspeakers.com+2 |
| Frequency Response | ~ 35 Hz to 200 Hz Crutchfield+1 |
| Voice Coil Diameter | 2 inches (≈ 50.8 mm) my.infinityspeakers.com+1 |
| Cone Material | Polypropylene Crutchfield+1 |
| Surround Material | Rubber (for durability, better excursion) Crutchfield+1 |
| Basket / Frame | Stamped steel frame Crutchfield+1 |
Physical / Mechanical / Thiele-Small Parameters
| Parameter | Value |
|---|---|
| Top-mount Depth | ~ 5-15/16 inches (~150 mm) Crutchfield+1 |
| Bottom / Overall Depth | ~ 6-7/16 inches Crutchfield |
| Cut-out Diameter | ~ 10-15/16 inches (~278.5 mm) Crutchfield+1 |
| Free-air resonance, Fs | ~ 29.7 Hz Crutchfield+1 |
| Vas (air compliance volume) | ~ 75.7 liters (~2.67 cubic feet) Crutchfield+1 |
| Qts (total Q) | ~ 0.49 Crutchfield+1 |
| Xmax (one-way maximum linear excursion) | ~ 11.35 mm Crutchfield |
Enclosure / Mounting Recommendations
From the manufacturer / spec sheets: Crutchfield+1
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Ideal sealed box: ~ 1.4 cubic feet (≈ 40 liters) internal volume. Crutchfield
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Ported (vented) box: ~ 1.6 cubic feet with a port of ~2.95 in diameter and ≈ 4 in length, tuned to around 34 Hz. Crutchfield+1
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Free-air / infinite baffle mounting is possible; note that in that setup, power handling drops (~half). Crutchfield+1
Features / What Makes It Good
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High power handling (300W RMS) gives you headroom to drive loud, without distortion. Crutchfield+1
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Durable build: rubber surround, polypropylene cone, stamped steel frame to withstand vibration, heat, and high excursion. Crutchfield+1
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Large voice coil (2″) helps in handling power and reducing heat. my.infinityspeakers.com+1
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Suitable for a variety of enclosure types (sealed, ported, free-air), giving flexibility depending on your space & sound preference. Crutchfield+1
Trade-Offs / What to Be Aware Of
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Although its lower frequency limit is 35 Hz, output will start falling off below that; it won’t be as deep as some large or more expensive subs.
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Needs good amplifier matching: to get the best performance without distortion, you’ll need an amp capable of ~250-350W RMS at 4 ohms. Poor amp or wiring will reduce performance.
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Big size and depth: the mounting depth (~150 mm) and cut-out size mean you need space; in small vehicles or tight trunks you’ll need to check physical fit carefully.
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Peak power (1200W) is just for short bursts; sustained usage at that power will likely stress things (heat, cone excursion, mechanical limits).
3 reviews for Infinity Primus 1270 – 12” Subwoofer | 300W RMS / 1200W Peak | Deep Bass & Durable Build
Infinity Primus 1270 – 12” Subwoofer | 300W RMS / 1200W Peak | Deep Bass & Durable Build
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“Great punch and clarity from this 12″ subwoofer; just make sure you’ve got a good amp behind it to unlock its full potential.”
“Amazing value — the bass hits hard for the price and fits neatly in my hatchback. Totally worth it!”
“The INFINITY 12” Primus 1270 subwoofer delivers deep, powerful bass—totally transforms my car audio experience!”