OB Sigma

(4 customer reviews)


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    Enjoy three-dimensional, spatially rich, holographic imaging (height, width, and depth). The OB Sigma incorporates a superior point source design for lock-tight pinpoint imaging and symmetrical polar responses to generate a truly expansive, transparent, life-like soundstage. All subtle nuances, harmonic overtones, and details clearly and accurately revealed. Musical performances that appear to emanate from thin air and space. True full-range, linear performance. A truly convincing and believable presentation with accurate and defined sense of timing and pace.

    • Proprietary Open Baffle-Hybrid Design
    • Dual 8″ transducers
    • Hybrid high frequency transducer
    • 93dB sensitivity 2.83V@1m
    • 6 Ohm average impedance
    • 35Hz-30Khz frequency response
    • 200 Watts power handling
    • Height 43″ (109.22 cm) x Width 17.125 (43.49cm) x Depth 14.25″ (36.95cm)
    • Call for custom colors.
    • Manufactured in the USA
    • Weight 62 lbs

    4 reviews for OB Sigma

    Based on 4 reviews
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    Showing 1 of 4 reviews (4 star). See all 4 reviews
    1. Trace

      Had my Sigmas for over 3 yrs now & have thoroughly enjoyed them. Coming from Apogee Duetta Signatures (15 yrs) I had grown to love open baffle sound. If you have enough room to get these 5 or 6 ft off the back wall you’re likely to love these. My only suggestion is get a sub (or better yet a pair of subs) to really flesh out the bottom end if you like the fuuuuull range sound. You just have to move a bit more air than these can accomplish (but I am spoiled). They blend beautifully with a pair of Hsu Research 10″ subs & my room is the equivalent of a 3 car garage. My-o-my, the openess, air and definition, without edginess, is wonderful! Careful placement of the subs can give you a most delicious low end and between all 3 amps I’m running nearly 900 watts so definition is remarkable as the system coasts along.

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    Professional Reviews

    Terry London, Home Theater Review
    "the Sigma OB can be driven with as little as eight watts, yet it can create soundstaging that rivals the best large planar or electrostatic panel speakers, but with much more accuracy in the location and size of players. It also has great lower-end bass extension; bass is tight and has great slam. Finally, these speakers render tonality and details of the music in a relaxing, natural way. [T]he whole time I spent reviewing the Sigma OB speakers, I kept thinking that these speakers have all the spatial virtues of big panels but add accurate sizing of players, along with chest-thumping bass and dynamics."