
JBL LSR310S
Score: 82/100
Klipsch R-120SW Black
Score: 81/100Rankings

The JBL LSR310S is a 10-inch powered studio subwoofer with a 200 W Class D amp, Slip Stream Port and multiple crossover options, delivering precise low-end for professional monitoring. Its down-firing design and lack of onboard EQ limit placement and fine-tuning flexibility. Best suited for studio engineers who need accurate bass and balanced inputs.

The Klipsch R-120SW is a 12-inch powered subwoofer that combines a 200 W RMS digital amp with adjustable controls, delivering punchy bass for small to medium spaces. Its deep cabinet depth and lack of wireless features can limit placement flexibility and modern integration. Best for budget-conscious users who need a compact yet powerful sub for apartments or modest home-theater setups.
| Attribute | ![]() | ![]() |
|---|---|---|
200 Wbest | 200 Wbest | |
— | 400 Wbest | |
9.84 in | 12 inbest | |
| ↓ lower better | 34.392 lb | 31 lbbest |
15 in | 16.5 inbest | |
15.66 inbest | 14 in | |
17.64 in | 19.2 inbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Audio(2) | ||
Frequency Response (Hz) | 27-80 Hz | 29-120 Hz |
Driver Size (in) | 9.84 in | 12 in |
Connectivity(1) | ||
Input Type | XLR, TRS | RCA |
Build & Design(5) | ||
Enclosure Type | Ported | Bass-reflex |
Weight (lb) | 34.392 lb | 31 lb |
Height (in) | 15.0 in | 16.5 in |
Width (in) | 15.66 in | 14 in |
Depth (in) | 17.64 in | 19.2 in |


Products in the top-left offer the best value (high score, low price).

Professional reviewers emphasize the LSR310S's engineering excellence, highlighting the Slip Stream Port and 200 W Class D amp that deliver deep, low-distortion bass down to 20 Hz with 113 dB SPL. They praise its flexible XLF mode and multiple crossover settings for studio versatility, especially when paired with JBL LSR305/308 monitors.
While direct consumer reviews are scarce, inferred feedback suggests users value the subwoofer's deep bass response and easy, plug-and-play connectivity, with no major complaints surfacing in the available sources.

Professional reviewers and editors commend the R-120SW for its efficient 200 W RMS digital amplification, front-firing 12" IMG woofer, and flexible controls, noting it delivers impressive bass for its size and price. However, they also point out its limited SPL, shallower low-frequency extension, and deep cabinet depth as drawbacks compared to larger, higher-output Klipsch subs.
Everyday users praise the sub for its powerful, room-filling bass, easy setup, and attractive finish, especially in small to medium rooms. Common complaints revolve around insufficient deep bass in larger spaces, occasional amp humming, port noise when placed near walls, and concerns about weight inconsistencies.
“best Klipsch sub for the money”
