Skip Navigation


Powered subwoofer (Dark Cherry)

1 Review

Item # 684USSDC

This item is no longer available.

Shop all Powered Subwoofers


Our take on the THIEL USS SmartSub®

Experience a new "low" in listening

It's hard to beat THIEL speakers for their pinpoint accuracy and clarity. Same for their subs. THIEL's USS SmartSub® delivers dynamic, low-distortion bass that pairs up perfectly with THIEL speakers, as well as other high-quality speaker systems. Its powerful 550-watt amplifier easily drives the front-firing 10" woofer — giving you deep, room-shaking low frequency effects from your favorite movies and clear, musical bass with your favorite tunes. The potent USS uses THIEL's exclusive SmartSub® technology to ensure exceptional performance, no matter where you place it in the room. Unlike traditional subs, it doesn't have a built-in crossover — so be sure to connect it to your home theater receiver's dedicated LFE (Low Frequency Effects) output, or use it with the THIEL PX05 passive crossover for full bass reproduction in an all-THIEL speaker system.

Precision engineering for awe-inspiring bass


A massive aluminum cone woofer delivers deep, punchy bass.

The woofer consists of a rigid aluminum driver and a heavy cast aluminum chassis. This solidly constructed driver maintains the proper shape as it moves, for crystal-clear sound reproduction, even when you crank up the volume. A motor structure consisting of a short, 6-layer voice coil sitting inside a large, double-stacked magnet effortlessly drives the woofer. Unlike the voice coils found in most speakers that extend outside the magnet, the deliberately short voice coil always "sees" the optimum magnetic field as it travels back and forth. This eliminates distortion caused by variances in magnetic strength. Unique electronic circuitry is also used to correct for compression distortion due to heating of the voice coil for more dynamic and effortless performance under heavy loads. It all adds up to thunderous bass that's fast, detailed, and articulate.

Rear panel

Advanced controls on the back of the sub make it easy to compensate for nearby walls, ensuring better bass response.

Smooth bass response — no matter where you put the sub

Placing any subwoofer against the wall or in a corner will produce uneven bass response due to dips and peaks at certain frequencies. THIEL ingeniously solved this problem with patented room-correction circuitry. Simply use the controls on the back of the sub to dial in the distance to the rear wall and nearest side wall, and the sub automatically calibrates itself to correct for boundary problems. You'll hear smooth and balanced bass no matter where you put the sub in your room. Best of all — the USS does this compensation without microphones, equalizers, or complicated measurements.

Product Highlights:

  • 550-watt RMS amplifier
  • 10" front-firing driver
  • line-level input frequency response: 10-300 Hz (±3dB)
  • LFE input frequency response: 16-300 (±3dB)
  • acoustic output: up to 99dB @ 20Hz, 106dB @ 30Hz
  • input sensitivity: 1 volt for 120dB @ 1 meter
  • SmartRoom filter eliminates room boundary problems for extremely balanced and smooth bass reproduction
  • inputs: 1 unfiltered LFE RCA and 1 line-level XLR
  • outputs: 1 RCA and 1 XLR
  • short coil/long gap driver design eliminates distortion caused by variances in magnetic strength
  • electronic circuitry corrects for compression distortion due to heating of the voice coil for more dynamic and effortless bass reproduction
  • real wood veneer finish
  • 11"W x 20"H x 15-1/2"D
  • weight: 55 lbs.
  • warranty: 10 years
  • Our 60-day money-back guarantee
  • Note: No built-in crossover — must be used with a receiver with an LFE output or the THIEL PX05 5-channel sub crossover

THIEL USS SmartSub® Reviews

Average Customer Review(s):

(1 Review)


Kumaravel from San Jose, CA 95117 on 7/27/2013

Crutchfield Customer Review (What's this?)

Thiel's SS2 SmartSub is very innovative and great sounding subwoofer. Playing deep bass seems to be its forte, and it settings for where you place subwoofer in your room helping to blend with the main electro static Mageplanar speakers. Our room was live when saw Pirates of the Caribean. It is worth every penny spent.

Pros: Able to adjust speaker distance from wall

Cons: It took almost 100+ hours for speaker breakin


Features and Specs

Enclosure Acoustic Suspension
Video Shielded No
Woofer Size (inches) 10
Woofer Composition Aluminum
Firing Direction Front
Wireless No
Preamp-Level Inputs Yes
Speaker-Level Inputs No
Speaker-Level Outputs No
Low-Pass Crossover Freq None
High-Pass Crossover Freq None
Phase Switch ---
Amplifier Output (watts) 550
Frequency Response 10-300 Hz
Height (inches) ---
Width (inches) ---
Depth (inches) ---
Weight ---
Speaker Parts Warranty 10 Years
Speaker Labor Warranty 10 Years
Amplifier Parts Warranty ---
Amplifier Labor Warranty ---