Ampex 1100

The Ampex 1100 reel-to-reel tape deck is a solid-state, quarter-track stereo recorder produced between 1966 and 1969 for the consumer hi-fi market. It is renowned for its advanced automation features, robust build quality, and versatile operability.

• Tracks: 4-track stereo (quarter-track).​

• Tape Speeds: 1 7/8, 3 3/4, and 7 1/2 ips (inches per second), offering a balance between extended play and high fidelity.​

• Max Reel Size: 7-inch reels.​

• Automation: Features auto-reverse playback and automatic threading system, allowing hands-free continuous operation and rapid tape changes.​

• Heads: 2-head design with Permalloy heads for stereo record/playback and erase.​

• Frequency Response: 50 Hz – 15 kHz at 7 1/2 ips, 50 Hz – 7.5 kHz at 3 3/4 ips; ±4 dB.​

• Wow and Flutter: 0.08% at 7 1/2 ips, 0.12% at 3 3/4 ips.​

• Signal-to-Noise Ratio: 53 dB at 7 1/2 ips, 48 dB at 3 3/4 ips, 43 dB at 1 7/8 ips.​

• Inputs/Outputs: Separate microphone and high-level (line/radio) inputs for each channel, RCA output, and variable ganged volume/tone controls per channel.​

• Motors: Single-motor transport.​

• Unique Features: Three-figure tape position indicator, illuminated recording button, automated tape direction reset, can be operated vertically or horizontally.​

• Auto-Reverse: Utilizes signal coding to automatically reverse direction at tape end, enabling dual-direction continuous playback or looping a tape segment indefinitely—a cutting-edge feature for the era.​

• Convenience: Designed with home and semi-pro users in mind, blending ease of use with advanced automation. Its unique auto-threading and semi-automated operation distinguish it from most mid-sixties competition.​

• Build: Models in the series include units with and without built-in amplifiers, but none have built-in speakers. Weights vary: ~27 lbs for the 1152, up to 39 lbs for amp-equipped models.

The Ampex 1100 series is highly regarded for its blend of consumer-friendly automation and sound performance rooted in the brand’s professional heritage. It provides robust stereo sound, very stable tape handling, and is sought after by collectors and HiFi enthusiasts due to its clever design and unique feature set.​

In summary, the Ampex 1100 is a consumer solid-state, quarter-track stereo deck with three tape speeds, auto-reverse, auto-threading, and notable automation, reflecting the quality and inventiveness of late-1960s Ampex engineering.