Audio Research EC-4 (mid-1970s)
Little is documented about the Audio Research EC-4 (Audio, July 1979, p.112). What the record shows is fragmentary. Almost all of it comes from classified advertisements in Audio magazine between 1975 and 1979. Those ads identify it as an electronic crossover (Audio, June 1977, p.145). It sat in the same ecosystem as Audio Research's SP-3 preamplifier, Dual 76 and D-51 amplifiers, and Magneplanar Tympani speakers.
The EC-4 came in two variants: the plain EC-4 (Audio, July 1979, p.112) and the EC-4a (Audio, June 1977, p.145). A 1979 classified (Audio, July 1979, p.112) lists an EC-4 for $250. A 1977 ad puts the EC-4a at $275 (Audio, June 1977, p.145).
No further specifications, design details, or factory literature have surfaced. The Archive would welcome a correction from anyone who owns one or has documentation.
- Type: Electronic crossover
- Variants: EC-4, EC-4a
- Observed price (period): $250 (EC-4, 1979) / $275 (EC-4a, 1977)
- Era: Mid-1970s
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- Audio Research D-1
- Audio Research EC-4A
- Audio Research LS-3
- Audio Research PH-1
- Audio Research SP-10
- McIntosh C104 (1950–1954)
- McIntosh C20
- McIntosh C200 (2000–2006)
- McIntosh C22 (1963–1968)
- McIntosh C35