ALTEC LANSING 1650
¥ 534,000 (around 1977)
Commentary
Acousta-Voicette's active equalizer was developed to improve the acoustic characteristics of listening rooms.
The Acousta-Voicette uses a special filter with sharp shoulders to achieve a bandwidth as narrow as 1/3 octave compared to conventional graphic equalizers. The audio frequency band can be divided and adjusted finely according to the sound field characteristics of the room and the characteristics of equipment.
1650 is designed for mono.
Model Rating
| Method | Active equalizer |
| Format | Monaural, 1/3 octave band, 28-element active filter |
| Frequency characteristic | 20 Hz to 20 kHz ± 1 dB |
| Number of filters | Mono, 28 pcs |
| Maximum Insertion Loss | -15dB at center frequency |
| Input level | +21dB or +1dB |
| Output level | + 21 dBm or + 1 dBm (600/150 Ω balanced output) |
| Input impedance | Unbalanced : 600/15k Ω Equilibrium : 15/600/15k Ω (Equilibrium |
| Noise level | -90dBm at + 21 dBm -100dBm at + 1 dBm |
| Power supply voltage | 120 VAC, 50Hz/60Hz |
| Power consumption | 5W |