- Production Period
- late 1970's
- Nationally Advertised Price
- $495 per pair
- Amplifiers Recommended
- 15 - 85W
- Impedance (typical)
- Frequency Response
- 30 - 20,000 Hz (+/-3dB)
- Sensitivity @2.8 Volts
- 88 dB
- Recommended Room Sizes
- 1440 - 2800 cu.ft.
The woofer is generally the largest driver in the system which covers the bass and mid-range frequency.
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.
The low tweeter is generally the midsize driver in the system which covers the upper mid-range and low treble
The high tweeter is generally the smallest driver in the system which covers the highest frequencies.
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 (except on some current white speakers, we have white as an option).
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.
The passive radiator looks like a large woofer from the outside. It produces the deepest octave of sound and has no magnet or motor assembly. The air inside the cabinet acts like a spring with the woofer driving one end and the passive radiator (PR) at the other. At the low frequency where the spring and the PR resonate, extra energy comes out of the system. Typically, the foam edge deteriorates within 20 years. We now use a new foam edge that is projected to last up to 30 years.
(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.
The Ohm K was a less expensive version of the Ohm H. They both had the same 8” woofer, 12” passive radiator and low tweeter. The K had a vinyl covered cabinet instead of the H’s real walnut veneer. The K also had a less expensive super-tweeter. The sound was nearly identical, including the exceptional deep bass.
The OHM K can have tighter and deeper bass with the addition of a new SubBass Activator (SBA) with our upgraded 8'' woofer and a new 12'' passive radiator. 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 and FerroFluid cooling which handles the thermo transients from CDs.
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 $495 for the return of a complete pair of undamaged Ohm Ks toward 25% of the purchase price of new Ohm speakers.