The D2 was the economy version of the popular C2. It used the same 10'' woofer in a simpler cabinet and used the C2's low tweeter, without the second tweeter. On axis, it sounded nearly the same; while off axis the C2s had more extended treble. An upgrade kit with the extra tweeters is available.
Upgrade Options:
The OHM D2 can be upgraded to the sound quality of an OHM C2 with the addition of a dome tweeter and crossover harness. The upper treble response is extended to add sheen to cymbals and metallic quality to horns. To use this kit you must first cut a hole in the front panel (a template is provided) and then install the crossover harness.
Both the C2 and the D2 can have tighter and deeper bass with the addition of a SubBass Activator (SBA) and our upgtaded 10'' woofer. The SBA eliminates the drive below the speaker's natural response to reduce distortion and clean up the deep bass. This allows for lower distortion, higher output and deeper bass, plus uses a self-resetting protection circuit. The upgraded woofers have a new cone surround that is projected to last up to 30 years, while the FerroFluid cooling handles the thermo transients from CDs.
Trade-In Options:
Ohm allows up to $595 for the return of a complete pair of undamaged Ohm D2s toward 25% of the purchase price of new Ohm speakers.
