Grotto

Compact and Accurate

The world's most affordable servo-controlled subwoofer, Grotto proves that a precise, compact subwoofer can have the heart of a beast.

Grotto combines explosive bass power with servo-controlled accuracy and precision in a surprisingly compact cabinet at a perhaps even more surprisingly affordable price. At its core are the same high-resolution 10-inch aluminum-cone driver used in our flagship Descent subwoofer and a proprietary advanced-design amplifier. Easy to set up and sporting an attractive contemporary look, Grotto integrates comfortably into any room and system.

Launched in 2003

Price when discontinued:
$1,195.00 each

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Grotto Specifications

Specifications are subject to change without notice

Frequency Response

22–150 Hz ±3dB; Anechoic through LFE effects input

Low Pass Filter Frequency

30, 35, 45, 55, 65, 80 Hz

High Pass Filter Frequency

70 Hz

Low Frequency Transducer

10" (25.4cm) high excursion, aluminum element woofer with extended throw drive assembly, non-resonance asymmetrical chamber format

Amplifier

250 watts rms (350 watts peak)

Impedance

RCA Line Level In: 20,000 Ohms Compatible with 4, 6, or 8 Ohm rated amplifiers.

Audio Controls

25Hz Level Control: ±12dB
Power: Auto/On/Standby

Inputs

RCA line level; RCA LFE; speaker level

Weight

40 lbs. (18.2 kg)

Dimensions

15.4" x 15" x 12.9 "
(39.1cm x 38.1cm x 32.8cm)

Customer Reviews For Grotto

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Jockey4her

  • Thursday, October 13, 2011

Grotto in a small office
My bosses stuck me in a stockroom closet and called it an office. The first (the very first) thing I did was install a pair of Quad powered bookshelf speakers, and the Martin Logan Grotto. To be frank, (and I mean this seriously) people really crapped themselves. To demo, I played Grateful Dead 06-05-85 Set II. Jeebus! I turned the cutoff down as low as possible and the filter basically, off, and the boost up. A totally bassy, non-audiophile configuration. But it goosed the heck out of everyone, and now, they let me live alone to live in peace. This box can fill a very large room. The phase correction knob is limited, but, probably enough for most spaces. It is a visceral thump and then some. You wont be dissapointed, except that you can't control it from Windows. :-) I blew the Quad's the first weekend, but not the Grotto. :-) Happiness, C

RocketD

  • Tuesday, December 7, 2010

Musical.
I use a Grotto as a "foundation" to my Aerius i's and it sounds great. It only struggles with the most demanding of bass at very high volume levels. Generally speaking though, it's hard to fault musically.... It's fast, accurate and involving. Nice small footprint too.

RocketD

  • Tuesday, December 7, 2010

Musical.
I use a Grotto as a "foundation" to my Aerius i's and it sounds great. It only struggles with the most demanding of bass at very high volume levels. Generally speaking though, it's hard to fault musically.... It's fast, accurate and involving. Nice small footprint too.

RocketD

  • Tuesday, December 7, 2010

Musical.
I use a Grotto as a "foundation" to my Aerius i's and it sounds great. It only struggles with the most demanding of bass at very high volume levels. Generally speaking though, it's hard to fault musically.... It's fast, accurate and involving. Nice small footprint too.