MartinLogan adds two sealed subwoofers, the Grotto 12 and Grotto 15. Each uses a Hybrid Woofer System with one active aluminum driver and two same-size aluminum passive radiators, backed by the Magnitude MT-2kW amplifier (2000W peak/1000W continuous) and an ultra-high-resolution Vojtko DSP engine. Wireless control and signal connection are built in, with ARC room correction support.
The company touts ported-like output and lower distortion in a compact, sealed package. App control, presets, and anti-vibration feet aim at easier setup and integration.
Key details: Grotto 12 is rated at 22–120Hz, ±3dB (anechoic via LFE). It uses a triple 12″ system in a sealed 1″ MDF cabinet with a center brace. Inputs include line-level L/R and LFE, XLR LFE, and speaker-level; an integrated wireless receiver with a transmitter is included. There’s an RCA sub out for daisy-chaining. Max power draw is 1000W; standby is
Grotto 15 is rated at 20–120Hz, ±3dB (anechoic via LFE). It uses a triple 15″ system in a sealed 1″ MDF cabinet with dual center braces. I/O and features mirror the 12. Dimensions are 20.5″ × 21.8″ × 21.8″; weight is 118 lb. Both models are available in Gloss Black and include integrated anti-vibration feet with carpet spikes.
Per the release, “Grotto series subwoofers offer a unique combination of understated, minimalist styling and impressively powerful, yet articulate performance.”
“The Hybrid Woofer System used in the Grotto series, pairs either a 12″ or 15″ active aluminum woofer with two equally sized, custom-designed aluminum passive radiators.”
“Thanks to the computational power of this sophisticated DSP engine, Grotto subwoofers are also compatible with the award-winning Anthem Room Correction system.”
MartinLogan positions the new series as carrying on the original Grotto’s legacy. Pricing is $2,299.99 USD/$2,599.99 CAD for the Grotto 12 and $2,799.99 USD/$3,199.99 CAD for the Grotto 15.
