Ohm D

The D used a 10” woofer in a cabinet with a resistive vent (AKA aperiodic) and the low tweeter from the C+. The D was known for its great “rock & roll” bass.

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The woofer is generally the largest driver in the system which covers the bass and mid-range frequency.

$295 2

The SubBass Activator is an electrical circuit which extends the deepest bass when the music calls for it, reduces the distortion for cleaner sound, increases the dynamic range for greater impact, and uses a self-resetting protection circuit to reduce the chance of damaging the speakers.

Low Tweeter

The low tweeter is generally the midsize driver in the system which covers the upper mid-range and low treble

High Tweeter

This kit adds a high tweeter to your system to make the performance of your D2 virtually equal that of the more expensive C2. You install it by cutting a hole in the front of your cabinet and reconnecting two sets of wires. No soldering necessary!

$358 4

The grill is the cloth and frame used to cosmetically conceal the drivers without affecting the sound. Ohm now uses black grills in almost all cases. In the past, brown and brown/black mixes were used; but every ”brown” turned out differently. Now they are all black.

Crossover service

The crossover is the electrical circuit that protects the tweeters from the low frequency energy that is reproduced by the main drivers. This can only fail, in rare instances, from overdriving the speakers.

(1) With the return of the original part for recycling within 60 days.
(2) With the return of the original part for recycling before the shipment of the new part.
(3) Recycled repaired and tested.
(4) Per pair.
(5) Special shipping rate applies.
Ohm D Specifications
Production Period
early 1970s
Nationally Advertised Price
$400 per pair
Amplifiers Recommended
at least 26W
Impedance (typical)
Frequency Response
52 - 17,000 Hz (+/-3dB)
Sensitivity @2.8 Volts
87 dB
Recommended Room Sizes
up to 2640 cu.ft.
  • The D used a 10” woofer in a cabinet with a resistive vent (AKA aperiodic) and the low tweeter from the C+. The D was known for its great “rock & roll” bass.

  • The OHM D 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 install this kit you must first cut a hole in the front panel (a template is provided) and then put in 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 upgraded 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 CD's.

    Another option available is the vent which allows for 1/3 octave deeper bass and also doubles the maximum sound pressure level in the bass. For installation you must cut a 2" circular hole (a template is provided) and then glue the new vent in.

    Note: Most Ohm upgrades require no specialized knowledge and are easily completed completed by any person. It takes less time to install your own upgrade than it does to package and return ship your speakers to the factory, therefore, we recommend you save time and money by doing this yourself. We ship the upgrade to your door with clear, easy instructions. If for any reason you prefer to have the factory complete your upgrade installation, we will be happy to do this for free, however, you will be responsible for shipping and handling costs each way.

  • Ohm allows up to $400 for the return of a complete pair of undamaged Ohm D's toward the purchase price of new Ohm speakers.

Contact Us

Ohm Acoustics Corp.
28 Tiffany Place, Unit 1L
Brooklyn, NY 11231 USA
Toll free: 800-783-1553
Phone: 718-422-1111
Service: 718-422-1111
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