Hi-Fi Hearing Aids Demonstrator — TD140

The TD140 is a human-head hearing-aid demonstrator for comparing two pairs of hearing aids. The catalog describes an A/B switch, LED level readout, wide gain adjustment, low-noise signal reproduction and eight headphone outputs for simultaneous listeners in clinics, stores, trade shows or research settings.

Hi-Fi Hearing Aids Demonstrator

Model: TD140 · Item No.: 100601107

The source describes a dual-ear demonstration head, a digital volume display and up to eight independent headphone outputs. Its compatibility and sound-quality language are catalog claims rather than independent performance measurements.

• Human-head design
• A/B comparison of two hearing-aid pairs
• Eight simultaneous headphone outputs
• Digital level readout
• Wide gain adjustment

Input power

110–230 V AC

Operating supply

12 V DC / 3 A

Output impedance

32 Ω

Total harmonic distortion

≤3%

Sensitivity

−42 dBV/Pa

Signal-to-noise ratio

70 dB

Gain range

−30 to +20 dB

Frequency response

20 Hz–20 kHz

Head dimensions

210 × 160 × 176 mm

Base dimensions

260 × 200 × 78.1 mm