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Altec Lansing 1594A Solid-State Power Amplifier - $450 (Gresham)
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Solid-State Power Amplifier (1967-68)
Specifications
Power output: 100 watts into 4 8 16Ω (mono)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 1%
Gain: 64 dB
Input sensitivity: 0.8V
Signal to noise ratio: 85dB
Speaker load impedance: 4Ω to 50Ω
Dimensions: 19 x 7 x 8.5 inches
Weight: 35.5lbs
Year: 1967
The Altec Lansing 1594A is a 100‑watt mono solid‑state power amp from the late 1960s, designed for pro sound reinforcement with transformer‑isolated outputs and wideband response.
Key specifications
Power output: 100 W continuous into 8 Ω (mono), rated for 4–50 Ω loads via output transformer taps.
Frequency response: 20 Hz–20 kHz, typically within about ±1 dB across the band.
Total harmonic distortion: about 1% at rated power over the audio band.
Gain and sensitivity: 64 dB voltage gain, 0.8 V rms input for full rated output, with input impedance around 15 kΩ on the high‑Z input.
Noise: Signal‑to‑noise ratio around 85 dB, suitable for PA and program use.
Outputs and loading
Transformer‑isolated outputs provide taps for 4, 8, 16 Ω, and constant‑voltage distribution lines (25 V/70.7 V or 50 Ω depending on version/documentation).
Because of the output transformer, the amp can deliver essentially its full 100 W rating into any of the supported loads when wired to the correct tap, and remains stable with long capacitive lines.
Physical and power details
Form factor: 19‑inch rackmount chassis, about 7 in high and 8.5 in deep.
Weight: roughly 35.5 lb (about 16 kg), typical of transformer‑coupled pro amps of the period.
Mains: 120/240 V, 50/60 Hz operation with internal strap change for line voltage; power consumption up to roughly 250 W at full output.
Design and era context
Era: Introduced around 1967 as part of Altec’s 1500‑series amplifiers, targeted at sound reinforcement, paging, and installed systems.
Circuit topology: Early solid‑state design with positive‑ground supply in the 1594A version and an output transformer for isolation and line‑matching, preceding the later 1594B/1594C negative‑ground variants.
Typical use: Driving Altec theatre/PA systems and playback speakers such as 844A enclosures, in both fixed installations and industrial applications.
have a few originally did the sound for Vortex these drove the horns
great shape for so old in fact in excellent shape
have several and sold a few
$450 each
$750 for both
I will consider any offer or trade