Infinity SM-152
A floor-standing studio monitor from Infinity's SM series, featuring adjustable drivers and high sensitivity.
Overview
The Infinity SM-152 is a floor-standing speaker and part of the Infinity SM (Studio Monitor) Series. Manufactured in the USA, it was designed as a high-performance studio monitor with user-adjustable response controls. The speaker features a 3-way configuration with a bass reflex enclosure and is known for its high sensitivity and use of polypropylene drivers.
Specifications
| Type | 3-way |
| Enclosure | Bass Reflex |
| Nominal Impedance | 8 Ohm (sources conflict: some list 4 Ohm) |
| Recommended Amplifier Power | 10 to 300 watts |
| Frequency Response | 44Hz - 25kHz (+/-3dB) |
| Sensitivity | 102 dB |
| Woofer | 1 × 15″ (381 mm) polypropylene-coated low-frequency driver |
| Midrange | 2 × 4.5″ (114 mm) polypropylene membrane drivers |
| Tweeter | 1 × 25 mm |
| Special Features | 2 potentiometers for tweeter and midrange driver level adjustment |
Design
The SM-152 incorporates Infinity's use of polypropylene woofers and features adjustable potentiometers for fine-tuning the output levels of the tweeter and midrange drivers, allowing for room-specific sonic optimization.
Market
Owners have reported the need to re-foam the woofer surrounds after extended use, a common maintenance task noted across user groups. Spare crossover plates (J1012-112152) are available, and some units have been professionally re-foamed. Original retail price was $999 each in 1987.
Market Value
┌──────────────────────────────────────────────────────────────────────────┐ │ INFINITY SM-152 Apr 2026 │ ├──────────────────────────────────────────────────────────────────────────┤ │ High $1,700 Latest $1,550 │ │ Median $1,550 Trend ▼ Down │ │ Low $571 Volume ~1/mo │ ├──────────────────────────────────────────────────────────────────────────┤ │ $2,000 ┤ │ │ │ │ │ │. │ │ $1,357 ┤ .│ │ │ │ │ │ │ │ │ │ │ $500 ┤ . │ │ ├─────────────────────────────────────────────────────────────────│ │ vol │█ █ █│ │ └─────────────────────────────────────────────────────────────────│ │ 2026-01 2026-03 2026-04│ └──────────────────────────────────────────────────────────────────────────┘
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