Martin Logan Grotto i 10" Powered Sub

For sale is my Martin Logan Grotto i in black ash.It is in excellent condition and functions perfectly.A very stylish and compact sub that produces tight,articulate and tuneful bass thanks in part to the sealed servo design and the 300 watt RMS amp.But it is also very powerful sounding for home theater too in small to medium rooms.One of the best sounding subs I have heard that would blend well with many different speaker brands.
I have the owners manual,power cord.rubber feet and spikes.I don't have the original box but it will be very well packed for a secure shipment.Email with any questions.Thanks!
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Compact and Accurate
A powerful 300 watt (900 watt peak) low-distortion, high-reliability amplifier gives Grotto i extremely articulate bass without need of exaggerated amplifier power ratings or transient-blurring ported or passive radiator enclosures common to many modern subwoofers. A proprietary servo system further ensures that output from Grotto i's 10-inch high-resolution aluminum cone woofer is dramatically free of distortion and provides a faithful replica of the audio input signal.

Specs:
Frequency Response
22–120 Hz ±3dB; Anechoic through LFE effects input
Low Pass Filter Frequency
30, 35, 45, 55, 65, 80Hz
High Pass Filter Frequency
70Hz
Low Frequency Transducer
10" (25.4cm) high excursion, aluminum cone with extended throw drive assembly, sealed non-resonant asymmetrical chamber format
Amplifier
300W (at less than 0.5% THD)
900W (peak)
Impedance
Line level RCA: 20,000 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers.
Audio Controls
±10dB at 25Hz
Inputs
Left/Right RCA Line Level, RCA LFE, Speaker Level
Power Draw
Max: 250 Watts
Idle: 15 Watts
Standby: 10 Watts
Weight
51 lbs. (23.2 kg)
Dimensions
18.6" × 15.2" × 13.8"
(47.3cm × 38.6cm × 35cm)