I have a very lightly used pair of Spatial M2 Turbo speakers. Great sounding open baffle with excellent bass response. And they look good too.
Specs from Spatial:
Type: Compact 2-way, point source, open-baffle, dynamic driver, controlled directivity
Chassis: 5 layer Aluminum Composite / HDF
Driver compliment: Two 12 inch mid/woofers, one wide bandwidth compression driver
Crossover: 800Hz - Passive - Hologram Network Technology
Frequency Response: 43Hz - 20kHz +/- 3dB in room response
Sensitivity: 95dB - averaged across 200Hz to 5kHz at 1M - on axis
Impedance: 4Ω nominal, 3 Ω minimum, low phase angle
Dimensions: 27T x 16W x 3D inches, 35 lbs.
https://www.audiogon.com/listings/full-range-spatial-audio-hologram-m2-turbo-axp...