In-Wall (2×6) Regenerative Transmission Line® RTL Subwoofer

The S90i’s highly efficient design yields fast, dynamic, articulate results with accurate timbre. This is a high-end subwoofer solution for customers who desire no-compromise performance, but prefer the aesthetic benefits of custom installed, hidden loudspeakers. The S90i’s superb performance characteristics, which include flat response to 20 Hz with usable in-room energy down to 17 Hz, and outstanding dynamic capability and accurate timbre reproduction.


Key Features


In-wall (2×6) with grille

Regenerative Transmission Line® design

Key Benefits

Highly Detailed & Dynamically Accurate

(2) Custom designed high-output long throw 5”x7” woofers


Available with no grille for behind fabric installations – S90i-basic port

Available with floor/ceiling extension port kit – S90i-f/c

More Features

Flat frequency response across a 20Hz-80Hz operating range

(2) High operating woofers

(DSP Required)

(1) Channel of Power Amplification

Per subwoofer required

The Regenerative Transmission Line®

Regenerative Transmission Line® designs yielded the unique combination of high sensitivity, high output, and low distortion with the uniform and extended response we required. The result is extraordinary power and punch combined with a remarkable level of quickness, tunefulness and realism.


Frequency response 20Hz – 80 Hz ± 2dB relative to the target curve
Impedance 4 ohms
Sensitivity 93 dB / 2.83V / 1m
Power handling, peak 1000w
Maximum SPL 123dB / 20Hz / 1m
Shipping weight 65 lbs. (30 kg)
Dimensions HxWxD 92.75” x 15.875” x 6.125” (235cm x 40.3cm x 15.5cm)