Klipsch R-121SW vs RSL (Rogersound Labs) Speedwoofer 10S MKII

Last updated: September 19, 2026

Short answer: the RSL Speedwoofer 10S MKII for amplifier headroom, the Klipsch R-121SW for price. The RSL ranks #87 of 145 medium subwoofers at $499, pairing a 10-inch ported cabinet with a 400W RMS (1020W peak) XDR amplifier. The R-121SW costs $249, and its 12-inch spun-copper driver with 200W RMS delivers controlled, musical bass with minimal distortion.

Klipsch R-121SW vs RSL (Rogersound Labs) Speedwoofer 10S MKII

What the Klipsch R-121SW gets right: 12-inch spun-copper driver with 200W RMS delivers controlled, musical bass with minimal distortion.

On the RSL (Rogersound Labs) Speedwoofer 10S MKII side: 10-inch ported with 400W RMS (1020W peak) XDR amplifier.

Buy the Klipsch R-121SW. Both are rated the same for sound quality, and it costs $250 less than the RSL (Rogersound Labs) Speedwoofer 10S MKII.

Want more options? Browse the full Subwoofers rankings.

Buy the Klipsch R-121SW at Amazon ($249.00) →Buy the RSL (Rogersound Labs) Speedwoofer 10S MKII at RSL (Rogersound Labs) ($499) →

Specifications Side By Side

Klipsch R-121SW RSL (Rogersound Labs) Speedwoofer 10S MKII
Price$249.00$450
Ranked#95 of 145 in Medium Home Subwoofers (30-75 lbs)#87 of 145 in Medium Home Subwoofers (30-75 lbs)
Enclosureported, rearported, rear
Output SPL at 15 Hz90.7 dB89.0 dB
Output SPL at 20 Hz96.0 dB100.0 dB
Output SPL at 25 Hz98.4 dB105.0 dB
Output SPL at 31.5 Hz102.3 dB107.7 dB
Output SPL at 40 Hz108.2 dB110.3 dB
Output SPL at 50 Hz112.4 dB112.9 dB
Output SPL at 63 Hz112.9 dB113.0 dB
Output SPL at 80 Hz111.3 dB112.1 dB
Output SPL at 100 Hz109.9 dB111.4 dB
Output SPL at 125 Hz108.3 dB110.7 dB
CEA-2010-A Average (40-80Hz)111.2 dB112.1 dB
Dimensions16.6"H x 16"W x 19.7"D (421.6 x 406.4 x 500.4 mm)15.5"H x 15"W x 15.7"D (393.7 x 381.0 x 400.0 mm)
Weight35.1 lbs (15.9 kg)40.6 lbs (18.4 kg)
Warranty5/25/2
Cabinet Colorblackblack, white
CountryUnited StatesUnited States
Measurement SourceAudioholicsAudioholics
Amplifier Power200W RMS400W RMS
Frequency Response28-120Hz21-200Hz
Drivers12" (305mm) driver10" (254mm) driver
Buy the Klipsch R-121SW at Amazon ($249.00) →Buy the RSL (Rogersound Labs) Speedwoofer 10S MKII at RSL (Rogersound Labs) ($499) →

How RSL (Rogersound Labs) Speedwoofer 10S MKII compares with other leading options:

Prices on this page were last checked September 23, 2026 at 11:24 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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The Two Speakers In Full

Klipsch R-121SW: $249.00 Amazon eBay

Klipsch R-121SW ranking card

Pros: 12-inch spun-copper driver with 200W RMS delivers controlled, musical bass with minimal distortion. Front-firing design maximizes placement flexibility. Excellent value with exceptional bang-for-buck.

Full Klipsch R-121SW review and specifications →

Amplifier Power200W RMS
CEA-2010-A Average (40-80Hz)111.2 dB
Cabinet Colorblack
CountryUnited States
Dimensions16.6"H x 16"W x 19.7"D (421.6 x 406.4 x 500.4 mm)
Drivers12" (305mm) driver
Enclosureported, rear
Frequency Response28-120Hz
Measurement SourceAudioholics
Output SPL at 15 Hz90.7 dB
Output SPL at 20 Hz96.0 dB
Output SPL at 25 Hz98.4 dB
Output SPL at 31.5 Hz102.3 dB
Output SPL at 40 Hz108.2 dB
Output SPL at 50 Hz112.4 dB
Output SPL at 63 Hz112.9 dB
Output SPL at 80 Hz111.3 dB
Output SPL at 100 Hz109.9 dB
Output SPL at 125 Hz108.3 dB
Warranty5/2
Weight35.1 lbs (15.9 kg)
Check current price at Amazon ($249.00) →Search eBay for Klipsch R-121SW →

RSL (Rogersound Labs) Speedwoofer 10S MKII: $450 RSL (Rogersound Labs) eBay

RSL (Rogersound Labs) Speedwoofer 10S MKII ranking card

Pros: 10-inch ported with 400W RMS (1020W peak) XDR amplifier. DSP with dual modes (LFE mode for 22Hz extension, Music mode for tight response). Quick tight musical bass at excellent $499 price. Wireless receiver built-in.

Full RSL (Rogersound Labs) Speedwoofer 10S MKII review and specifications →

Amplifier Power400W RMS
CEA-2010-A Average (40-80Hz)112.1 dB
Cabinet Colorblack, white
CountryUnited States
Dimensions15.5"H x 15"W x 15.7"D (393.7 x 381.0 x 400.0 mm)
Drivers10" (254mm) driver
Enclosureported, rear
Frequency Response21-200Hz
Measurement SourceAudioholics
Output SPL at 15 Hz89.0 dB
Output SPL at 20 Hz100.0 dB
Output SPL at 25 Hz105.0 dB
Output SPL at 31.5 Hz107.7 dB
Output SPL at 40 Hz110.3 dB
Output SPL at 50 Hz112.9 dB
Output SPL at 63 Hz113.0 dB
Output SPL at 80 Hz112.1 dB
Output SPL at 100 Hz111.4 dB
Output SPL at 125 Hz110.7 dB
Warranty5/2
Weight40.6 lbs (18.4 kg)
Check current price at RSL (Rogersound Labs) ($499) →Search eBay for RSL (Rogersound Labs) Speedwoofer 10S MKII →