Subs for Cars: How to Pick, Power, and Install One
Your door speakers give up around 80 Hz. Here is what a subwoofer actually adds, how to size and...
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Stereo Integrity
Stereo Integrity HS-24 | 24 Inch Subwoofer
SKU: SI-HS24-D1-STD
$ 1,799.99
QUICK SPECS
- Type: 24 in subwoofer, sold individually
- Power Handling: 3000W RMS
- Excursion: 40 mm one-way linear
- Enclosure: 8 cu ft sealed, or 20 cu ft ported
- Mounting Depth: 12.75 in, 22.375 in cutout
Stereo Integrity HS-24 | 24 Inch Subwoofer
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Stereo Integrity
HS-24
24 Inch Subwoofer | Sold Individually
3000W RMS 40 mm One-Way Xmax 8 cu ft Sealed Dual 1 or Dual 2 Ohm Standard or Accordion Surround
Full Bandwidth Bass From One Driver
The HS-24 is the Stereo Integrity 24 inch subwoofer, built to combine high fidelity, serious output, and a manageable enclosure in a single driver. Stereo Integrity designed every part with FEA simulation and CAD, then verified the finished driver on a Klippel system. It is aimed at low frequency effects and ultra-low frequency playback, with a bandwidth potential that Stereo Integrity puts at 5 Hz to 1000 Hz.
Stereo Integrity says the HS-24 keeps the precision of a 10 or 12 inch subwoofer despite its size, and its large linear displacement lets it play full bandwidth down into the single digits.
Engineering Highlights
High-Bl Ferrite Motor
A 10 inch diameter, quad-stacked Y35 ferrite motor provides the force to control a cone this large in a compact enclosure.
Three Shorting Rings
Three internal shorting rings control and linearize inductance across the long stroke, which keeps the bass accurate and tight.
Bifilar Copper Coil
Bifilar copper voice coil windings reduce inductance further, supporting 40 mm of one-way linear excursion and more than 120 mm of peak-to-peak stroke.
Carbon Fiber Sandwich Cone
The carbon fiber and Kevlar sandwich cone rides on a 3 layer, 10 inch Nomex spider in a cast aluminum basket, with large 4 AWG spring-loaded terminals.
Enclosure and Power
Stereo Integrity rates the HS-24 at 3000 watts RMS. The driver reaches a 0.707 alignment in an 8 cubic foot sealed enclosure, which Stereo Integrity notes is smaller than a 28 inch cube. For a vented build it recommends 20 cubic feet, and the specification sheet lists the tuning for each surround option in the table below.
Surround options: The standard version uses a foam surround and lists an Fs of 16.2 Hz with a Qts of 0.47. The accordion version uses a cloth surround and lists 23.1 Hz with a Qts of 0.55. Both are rated for 40 mm of one-way excursion.
Choosing Your Version
The HS-24 comes in dual 1 ohm and dual 2 ohm. Dual 1 ohm coils wire to 0.5 ohm in parallel or 2 ohms in series, and dual 2 ohm coils wire to 1 ohm in parallel or 4 ohms in series. Pick the surround and impedance together, since the two surround options carry different parameters.
Fitment and Ordering
Cutout: 22.375 in. Outer diameter: 24.35 in. Mounting depth: 12.75 in. Displacement: 0.45 cu ft. Driver weight: 95 lb.
The HS-24 is built to order and ships by freight. Call 931-563-5151 before you order for current lead time and delivery options.
Authorized Stereo Integrity Dealer
Audio Intensity is an authorized Stereo Integrity dealer, and we build enclosures around their drivers.
Call 931-563-5151 to plan an HS-24 build, from enclosure volume to amplifier power.
| Specifications | ||
|---|---|---|
| Model | HS-24 | |
| Size | 24 in | |
| Voice Coil Options | Dual 1 ohm or dual 2 ohm | |
| Power Handling (RMS) | 3000 W | |
| Voice Coil | Bifilar copper windings | |
| Motor | 10 in quad-stacked Y35 ferrite, three internal shorting rings | |
| Spider | 3 layer, 10 in Nomex | |
| Cone | Carbon fiber and Kevlar sandwich | |
| Frame | Cast aluminum | |
| Terminals | Large 4 AWG spring-loaded | |
| Outer Diameter | 24.35 in | |
| Cutout | 22.375 in | |
| Mounting Depth | 12.75 in | |
| Driver Displacement | 0.45 cu ft | |
| Weight | 95 lb driver, 145 lb listed shipping weight | |
| Thiele-Small Parameters | ||
| Parameter | Standard Surround | Accordion Surround |
| Surround Material | Foam | Cloth |
| Resonant Frequency (Fs) | 16.2 Hz | 23.1 Hz |
| DC Resistance (Re) | 3.5 ohm | 3.7 ohm |
| Voice Coil Inductance (Le) | 2.1 mH | 2.0 mH |
| Electrical Q (Qes) | 0.52 | 0.61 |
| Mechanical Q (Qms) | 5.36 | 5.71 |
| Total Q (Qts) | 0.47 | 0.55 |
| Equivalent Compliance (Vas) | 563.7 L | 318.6 L |
| Effective Piston Area (Sd) | 322.8 sq in | 314.1 sq in |
| Force Factor (Bl) | 26.32 Tm | 27 Tm |
| Moving Mass (Mms) | 1067.2 g | 864 g |
| Suspension Compliance (Cms) | 92.7 um/N | 54 um/N |
| Linear Excursion (Xmax) | 40 mm one-way (70% Bl) | 40 mm one-way (70% Bl) |
| SPL | 92.09 dB | 93.1 dB |
| Enclosure Recommendations | ||
| Enclosure | Standard Surround | Accordion Surround |
| Sealed | 8 cu ft | 8 cu ft, 12 cu ft maximum |
| Ported | 20 cu ft tuned to 15 Hz | 20 cu ft tuned to 20 Hz |
| ULF Ported | Not listed | Up to 30 cu ft tuned to 17 Hz |
| Figures as published by Stereo Integrity. The two parameter sets correspond to the standard and accordion surround options. | ||
See every Stereo Integrity subwoofer box and enclosure, each cut for a specific Stereo Integrity driver.
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