The 204 Theremin
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The Harrison Instruments Model 204 Theremin is a complete tabletop pitch instrument with a built-in loudspeaker. It is powered by an internal 9-volt battery, and has an output jack for connection to an external amplifier or effects processor. When used as a stand-alone theremin, the 204 provides a fixed volume suitable for small-group demonstrations, and serves equally well in business and retail venues. The 204's highly stable, low-noise output is well-suited for practice, performance and recording.

Features

• High-fidelity, pleasing output tone with exceptionally low noise, wide pitch range, and good linearity (click for 300kByte .wav sound sample)
• Output Jack for connection to external amplifier or effects processor
• Loudspeaker disconnects when cord is inserted
• Precision, ten-turn Zero Control for easy sensing adjustment
• Sufficient sensing range to operate without a ground connection; increased sensing range with ground
• Attractive clear-anodized brushed aluminum and 9-ply wood cabinet for tabletop use
• Rubber feet prevents marring delicate surfaces
• Detachable, plug-in plate antenna
• Internal 9v battery provides hours of play time

• Rear battery access through screw-on panel (click to view)
  

View User Manual

Specifications

Overall Dimensions (without antenna)	8"W x 5.5"H x 4.1"D
Overall Dimensions (with antenna)	8"W x 8"H x 6"D
Antenna Dimensions	6" Square Plate, 2.75" above enclosure
Power Source	One 9V Alkaline Battery, Duracell® MN1604
Battery Current (no tone in internal speaker, or with external amplifier)	5 milliamperes, typical
Battery Current (160Hz tone in internal speaker)	16 milliamperes, typical
Battery Life (constant 160Hz tone in internal speaker)	20 Hours, typical
Speaker Sound Level at 1 Meter	44dBA @ 110Hz 62dBA @ 220Hz 80dBA @ 440Hz 70dBA @ 880Hz
Output Level (160Hz tone)	350mV P-P into 10K Ohms
Output Impedance	900 Ohms
Output Connector	1/4" Mono Phone Jack for standard cord
Pitch Response to Hand Position (with theremin grounded through output cord)	(view graph)
Weight (with antenna and battery)	1.92 Pounds
Shipping Carton Dimensions	10"W x 10"D x 7"H (view packing details)
Shipping Weight	2.81 Pounds

Ordering Information

Warranty and Repair Service

Harrison Instruments One-Year Limited Warranty

Harrison Instruments, Incorporated ("Harrison Instruments") warrants this product to be free from defects in materials and workmanship for a period of one (1) year 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, Incorporated
   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.
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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.
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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