REL Studio III subwoofer Specifications

Sidebar 1: Specifications

Description: Super "Acoustic Resistive Matrix" (ARM)-loaded, powered subwoofer. Inputs: 2 line-level, unbalanced (RCA) phono inputs with 0dB and +12dB sensitivities, 1 line-level, balanced XLR input, 2 speaker-level inputs using Neutrik Speakon connectors, one balanced, one unbalanced. No signal-sensing auto on/off. Drive-units: two downward-firing, long-excursion, heavy-duty 10" paper-cone woofers made by Volt. Crossover: low-pass filter (defeatable) using REL Active Bass Control (ABC) in 24 semitone increments, 22-96Hz, 12dB/octave slope; no high-pass filter option. Switchable phase: 0 degrees or 180 degrees. Amplifier output power: 500W RMS. Frequency response: 9-100Hz, ±6dB. Total harmonic distortion: not specified. Accessories included: detachable power cord, 35' (10m) signal cable.
Dimensions: 26.7" (685mm) W by 24" (617mm) H by 22.1" (567mm) D. Internal volume: 110 liters. Net weight: 205 lbs (93kg).
Finishes: Black oak, cherry, rosenut, walnut.
Serial number of unit reviewed: 301479.
Price: $8995. Approximate number of dealers: 100. Warranty: 3 years parts & labor.
Manufacturer: REL Acoustics Ltd., North Road, Bridgend Industrial Estate, Bridgend CF31 3TP, England, UK. Tel: (44) (0)1656-766093. Fax: (44) (0)1656-766093. Web: US distributor: Sumiko Audio, 2431 Fifth Street, Berkeley, CA 94710. Tel: (510) 843-4500. Fax: (510) 843-7120. Web:

US distributor: Sumiko Audio
2431 Fifth Street
Berkeley, CA 94710
(510) 843-4500

Doctor Fine's picture

The relationship between ultra low frequencies and increased midrange palpability and clarity underscores the necessity for the lowest foundation air movement---if one is to put into the listening environment all the overtones found in the actual recorded space.

One forgets that even human speach has a percussive component which releases sub bass air movement.  A plosive consonant has a leading edge of compressed air as it is sounded.  No wonder the lack of ultra low frequencies robs typical playback of it's "realness."

One has to experience a properly understated $9000 add-on like the Rel to understand why you would actually NEED such a thing.  Of course then it is too late and you are ruined for life.