Ohm A
The Ohm A was one of our landmark speakers. The Klipschorn, Quad ESL and AR-1 are some others that come to mind. The Ohm A was a limited production series of hand made prototypes of Lincoln Walsh invention. The driver was 18” in diameter and operated from 20 - 20,000 Hz. Overall it was the size of a medium sized refrigerator. Power requirements were high as it sounded best with 350 plus watts, but could only handle about half of that safely.
When we completed the original Ohm Walsh 5, we compared it to our pair of Ohm As. With the Walsh 5’s bass control set at increase, perspective controls at mid and treble at decrease, the two systems sounded like one model. After 17 years of development we were right back where we started! Our improvements had not been in sound quality or quantity BUT we had improved sensitivity by 20 times, peak power head room by 2, reduced the size by 2, widened the sweet-spot by 12 and reduced the room placement fussiness.
Today we put the latest Walsh drivers on old Ohm A cabinets to gain deeper bass.
- Production Period
- early 1970s
- Nationally Advertised Price
- $1550 - $3995 per pair (varied over time)
- Amplifiers Recommended
- 100 - 300W
- Impedance (typical)
- 8Ω
- Frequency Response
- 25 - 17,000 Hz (+/-3dB)
- Sensitivity @2.8 Volts
- 78 dB
- Recommended Room Sizes
- 1600 - 4800 cu.ft.
The A4000 upgrade is for large rooms; while the A5000 can be used in any size up to 6000 cu.ft. You retain your old Ohm A cabinets while you get two new drivers, new driver mounting boards, input terminals, and grills. The overall performance is comparable to the original Ohm A but requires only 1/00th of the power to drive it. The Full Room Stereo effect is more pronounced because of the controlled dispersion. Minor cabinet modifications are required and the entire installation takes less than 1 hour.
The sound of the A5000s is amazingly similar to the original As if you set the bass and mid-bass controls to the maximum, mid-range control to the middle, and treble control to the down position. These controls allow you to match the sonic character of your room as well as your taste. You'll enjoy sound from one of the best speakers in the world.
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 $3995 for the return of a complete undamaged pair of Ohm As toward 25% of the purchase price of new Ohm speakers.
| Service Options | Price | Order |
|---|---|---|
| Upgrade to A5000 | $5,000 1 4 | |
| Upgrade to A4000 | $4,200 1 4 | |
| Grill | $600 4 | |
| (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. | ||
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