Alumapro Alchemy RX 12 12-Inch Metal Cone Subwoofer
Alumapro Alchemy RX 12 12-Inch Metal Cone Subwoofer
The Alchemy RX 12 is the Alumapro flagship. Alumapro's proprietary FEA-designed alloy cone, an actively cooled motor with a copper shorting ring, 15 mm of excursion and 500 W RMS on a proprietary cast frame deliver the deepest, most powerful bass in the Alumapro lineup. The standard RX has the lowest resonance of the three RX versions and is built for sealed boxes.
Highlights
- Proprietary FEA-designed alloy cone
- Active cooling motor system
- Copper eddy-current shorting ring
- Aluminum-wire voice coil
- Extended-excursion Santoprene surround with dual laminated Nomex spiders
- Proprietary cast frame
- 15 mm Xmax, 26 Hz resonance (single 4-ohm)
- Computer-optimized design for high efficiency and power capacity
- 500 W RMS / 1,000 W peak
Which Alchemy RX is right for you?
All three RX 12 models share the same proprietary FEA-designed alloy cone, motor, proprietary cast frame, 15 mm Xmax, mounting size and 500 W RMS / 1,000 W rating, and they look the same from the outside. The difference is in the suspension and tuning, which decides the box each one is built for.
| RX 12 | RX 12 SPL | RX 12 SQ | |
|---|---|---|---|
| Built for | Sealed | Ported, maximum output | Sealed, sound quality |
| Recommended box | Sealed 1.0–1.2 ft³ | Ported 2–3 ft³, tuned 32–38 Hz | Sealed 1.0–1.4 ft³ |
| Suspension | Dual laminated Nomex spiders | Quad laminated Nomex | Laminated Nomex |
| Surround | Extended-excursion Santoprene | Thick Santoprene | High-roll Santoprene |
| Fs (single 4 ohm) | 26 Hz | 35 Hz | 30 Hz |
| Vas (single 4 ohm) | 3.13 ft³ | 1.5 ft³ | 2.4 ft³ |
Not sure which fits your build? Contact us with your vehicle and box plans.
Specifications
| Parameter | Single 4 Ohm | Dual 4 Ohm (parallel) | Dual 4 Ohm (series) |
|---|---|---|---|
| Fs (Hz) | 26 | 28 | 28 |
| Qms | 3.1 | 3.5 | 3.5 |
| Qes | 0.4 | 0.5 | 0.5 |
| Qts | 0.353 | 0.43 | 0.43 |
| Vas (Ft³) | 3.13 | 2.5 | 2.5 |
| Re (Ohms) | 3.9 | 1.9 | 7.8 |
| Xmax (mm) | 15 | 15 | 15 |
| Sensitivity (dB/2.83 V/1 m) | 92 | 93.5 | 87.5 |
Mounting dimensions (inches)
| Outside diameter | 12-9/16" |
|---|---|
| Mounting hole (cutout) | 11-5/16" |
| Bolt circle diameter | 12-5/16" |
| Mounting depth | 6-1/2" |
Recommended enclosures
- Sealed: 1.0–1.2 ft³ (typical internal dimensions 13"H × 20"W × 8"D)
The Alumapro difference
Alumapro has built aluminum-cone subwoofers in the USA since 1994. An aluminum alloy cone stays rigid under power where paper and poly cones flex, and it helps draw heat away from the voice coil, so bass stays tight and controlled when you turn it up. Every Alumapro sub is hand built in Huntley, Illinois.
Buy direct from ShopAlumapro.com, the main online home of Alumapro. Every order comes with the 2-year warranty, free shipping on orders of $499 or more, and real support from our team in Cary, Illinois. Questions about your build? Talk to us.
Couldn't load pickup availability
Share
