The Harrison Instruments 151 Theremin
(Back to Harrison Instruments' Main Page)

The unique Harrison Instruments Model 151 Theremin is designed for superb fidelity, stability, and ease of use. Compact, lightweight and completely portable, the 151 sets up in minutes, with battery operation eliminating the need for an external power source. When used with a mic stand and a battery-portable amplifier such as the VOX® DA-5, the 151 permits a theremin performance virtually anywhere. Equally suited for the studio, the 151 also provides unexcelled results for use in recordings and soundtracks.

The 151 Theremin was designed with the road musician in mind. Thoroughly evaluated in the rigors of harsh travel environments, it has been perfected and tested by thereminist Arthur Harrison while traveling extensively with The Cassettes in US Tours for three years. The 151's attractive, symmetrical style is both elegant and unobtrusive, allowing a clear view of the performer. The horizontal pitch antenna permits a natural, low-stress hand position, reducing the fatigue that otherwise may result from playing traditional "pole" designs. Rugged, reliable, and manufactured to rigorous standards with the best commercial materials, the 151 Theremin is a road-ready, reliable companion for the serious musician.

The volume of the 151 Theremin is specifically designed to increase as the hand descends toward the plate. While contrary to the traditional theremin volume response, extensive human-factor evaluation has found such a "closer for louder" design to be much more intuition-inclined and therefore easier to learn and play. While thereminists accustomed to the traditional volume method can adapt to the 151 with practice, beginning thereminists will find that the 151 method is very intuitive in nature.

For the left-handed thereminist, the 151 is available with a left-side pitch antenna and right-side volume antenna. Please contact us for details.

Features

• Full-function Pitch and Volume capability
• One-knob Tone control provides a wide range of high-fidelity, pleasing output tones with exceptionally low noise (>65dB S/N)
  and excellent hand-distance response (Sound Sample 1)  (Sound Sample 2)  (Sound Sample 3) (Sound Sample 4)
• Five-octave pitch range with easily-learned "Louder for Closer" volume operation
• Precision, ten-turn Volume Zero and Pitch Zero controls for easy sensing adjustment
• Easy-access internal 9V battery (included) provides more than 24 hours of play time
• Convenient low-battery indicator indicates advance need of battery replacement
• Output Jack for connection to external amplifier or effects processor
• Sufficient Zero-adjustment ranges for operation without a direct earth connection
• Attractive clear-anodized brushed aluminum antennas and housing
• 9-ply furniture-grade wood yolk with 5/8"-27 female-threaded adaptor for easy attachment to common mic stands
• Detachable plate antennas
• Two-Year Limited Warranty
  

Specifications

Useful pitch range	Five octaves (55 Hertz to 1760 Hertz)
Available pitch range	Seven octaves (27 Hertz to 3520 Hertz)
Nominal pitch sensing distance	18 inches 45.7 cm
Pitch response	Frequency increases as hand distance decreases (View Graph)
Tone waveform characteristic range	Sine-like wave to fully-rectified sine-like wave
Volume dynamic range	62dB minimum
Nominal volume sensing distance	14 inches 35.6 cm
Volume response	Volume increases as hand distance decreases (View Graph)
Control compliment	Volume Zero (10-turn potentiometer) Output Level (1-turn potentiometer) Power Switch LED Power and Low Battery Indicator Tone (1-turn potentiometer) Pitch Zero (10-turn potentiometer)
Output connector	1/4" Mono Phone Jack for standard audio instrument cable
Output impedance	Approximately 900 Ohms
Maximum output level	3 Volts Peak-to-Peak
Power source	One IEC 6LR61 9V Alkaline Battery, Duracell® MN1604 or equal
Battery life	24 hours, minimum
Overall dimensions (without antennas):	17" L  x  8" W  x  3" H 43.2 cm L  x  20.3 cm W  x  7.6 cm H
Overall dimensions (with antennas):	26" L  x  8" W  x  3" H 66 cm L  x  20.3 cm W  x  7.6 cm H
Antenna dimensions	8" L  x  5.5"  W,  Rectangular 20.3 cm L  x  14 cm W
Weight	Approximately 3.5 Pounds 1.6 kg
Shipping weight	Approximately 4.3 Pounds 2 kg

Click for User Manual

Ordering Information

Please order through eBay

Harrison Instruments Model Number	Description	eBay
151 (Standard, Right-side Pitch)	Professional Theremin	203777260867

Warranty and Repair Service

Harrison Instruments Two-Year Limited Warranty

Harrison Instruments Corporation ("Harrison Instruments") warrants this product to be free from defects in materials and workmanship for a period of two (2) years from date of purchase, PROVIDED, however, that this limited warranty is extended only to the original purchaser and is subject to the following conditions, exclusions and limitations hereinafter set forth:

This limited warranty shall be void and of no effect, if:

1. The first purchase of the product is for the purpose of resale; or
2. The original purchase of the product is not made from Harrison Instruments; or
3. The product has been damaged by accident or unreasonable use, neglect, improper maintenance, or other causes; or
4. The serial number affixed to the product is altered, defaced, or removed; or
5. The product's enclosure is opened by any party not authorized by Harrison Instruments.

In the event of a defect in material or workmanship covered by this limited warranty, Harrison Instruments will repair the defect in material or workmanship without charge or replace the product, at Harrison Instruments' option, provided however, that in any case, all costs of shipping for the purpose of shipping the product to Harrison Instruments for repair are paid by you, the purchaser.

THE WARRANTY REGISTRATION CARD SHOULD BE ACCURATELY COMPLETED AND MAILED TO AND RECEIVED BY HARRISON INSTRUMENTS WITHIN FOURTEEN (14) DAYS FROM THE DATE YOU RECEIVE THE PRODUCT.

In order to obtain service under this warranty, you must:

1. Contact Harrison Instruments and obtain a Return Materials Authorization (RMA) number.
   
2. Ship the defective product, FREIGHT PREPAID and INSURED for its purchase value, to:
   
   Harrison Instruments Corporation
   Post Office Box 9012
   Rockville, Maryland 20916
   
   
3. Include a complete, detailed description of the problem.
   
4. Include a complete return address.

If the defect can be remedied under this limited warranty and other terms and conditions expressed herein have been complied with, Harrison Instruments will provide the necessary warranty service to repair or replace the product and will return it to you, the purchaser.

Limitation of Liability

Harrison Instruments' liability to the purchaser from any cause whatsoever and regardless of the form of action, including negligence, is limited to the the amount of the original purchase price of the product that caused the damage or that is the subject of, or directly related to, the cause of action.

Harrison Instruments does not assume liability for personal injury or property damage arising out of, or caused by, any or all alterations or attachments to its products, nor does Harrison Instruments assume any responsibility for damage to interconnected non-Harrison Instruments products that may result from the normal functioning and maintenance of Harrison Instruments products.
.
UNDER NO CIRCUMSTANCES WILL HARRISON INSTRUMENTS BE LIABLE FOR ANY LOST PROFITS, LOST SAVINGS OR COLLATERAL, ANY INCIDENTAL DAMAGES, OR ANY CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE ITS PRODUCTS, EVEN IF HARRISON INSTRUMENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
.
THIS LIMITED WARRANTY IS IN LIEU OF ANY AND ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR USE.

Contact Harrison Instruments

by e-mail, at:

sales@harrisoninstruments.com

or in writing, at:

Harrison Instruments, Incorporated
Post Office Box 9012
Silver Spring, Maryland 20916