Model 650 A AudiometerPortable, light weight

Easy to use tone switch

Tone present indicator

Plug-in 110 or 220 volt, 650A

Plug-in and battery, 650AB

Battery life indicator

Five year warranty

Extremely accurate

Exceeds all specifications

Steady and pulsed tone

Custom carrying bag

Patient response



Meets or exceeds ANSI S3.6 1989, (ASA 81-1989) ISO 389-1985, C.H.D.P, O.S.H.A, E.P.S.D.T. F.A.A., Police, Divers, requirements.

Frequency Range: 250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz

Accuracy better than ± 3%, (steady and pulsed tone)

Hearing Threshold Range: 0 to 90dB in 5dB steps

Accuracy better than ± 2 dB

Harmonic Distortion - less than 3% Power: 110-230 VAC, 50-60 HZ UL, C.S.A. approved power supply.

Long hour operation on one 9 volt battery (650AB).

Total Weight less than 4.5 Ibs (complete with headset, TDH 39 earphones, patient response, audiogram pad and carrying bag.)




This warranty is extended to the original purchaser of the audiometer by AMBCO through approved Special Instrument Distributor or through AMBCO and covers defects in materials of workmanship for a period of 5 years from the date of delivery to the original purchaser.


Defects will be corrected at no cost to purchaser within the first 5 years, except for shipping charges to and from point of service. This warranty does not apply to those parts that are subject to normal wear and tear, such as cords, power supplies, ear cushions and headbands. Replaceable parts which may deteriorate with use will be supplied at a reasonable cost. The manufacturer's liability under the above warranty is void, if the audiometer is repaired by other than AMBCO or authorized AMBCO Special Instrument Distributor.