Altec 725A (circa 1972)

Not much is documented about the Altec 725A. The record comes almost entirely from brief mentions in period equipment directories and test reports. What survives suggests it was a stereo receiver, and a capable one.

Test charts from Audio (January 1972, p.17) show a power-output curve labeled “60 WATTS RMS” with both channels driven simultaneously into an 8 ohm load, which aligns with that reading. The same directory entry lists an FM sensitivity of 1.8 µV for 30 dB quieting, a capture ratio of 1.3 dB, and the use of Butterworth and crystal filters in the IF section — solid engineering for the era. Rated harmonic distortion was 0.3% at full output.

The 725A measured 17 3/4″ wide by 5″ tall by 16 1/2″ deep and came in an oiled walnut cabinet. The listed price was $699.00. A separate $28.50 charge was likely for an optional cabinet or wooden sleeve.

That is about all that is known. No service manual, schematic, or owner's literature has surfaced in the archive's research, and the model does not appear in Altec's main product timelines. If you own a 725A or have documentation, the Archive would welcome a contribution.

• Type: Stereo receiver (FM/AM likely)
• Power output: ~60 W/channel RMS, both channels driven into 8 Ω
• FM sensitivity: 1.8 µV for 30 dB quieting
• Capture ratio: 1.3 dB
• IF filtering: Butterworth & crystal filters
• Distortion (rated): 0.3% at rated output
• Dimensions: 17 3/4″ × 5″ × 16 1/2″ D
• Cabinet: Oiled walnut
• Price (1972): $699.00 (plus $28.50 for optional cabinet)
• Related model: 714A (44 W/channel variant)

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Altec Lansing 725A Stereo Receiver Operating & Maintenance M

$150

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