Ampex 1150

The Ampex 1150 reel-to-reel tape deck, part of the Ampex 1100 series from the mid to late 1960s, is a solid-state, quarter-track stereo recorder designed primarily for amateur and home use. It is notable for its high degree of automation and innovative tape handling features.

• Track Format: 4-track quarter-track stereo.

• Tape Speeds: 7½, 3¾, and 1 7/8 inches per second, providing options for fidelity versus tape duration.

• Heads: Two Permalloy heads for stereo record/playback and erase.

• Tape Handling: Features an automatic threading mechanism and auto-reverse playback enabling continuous and convenient tape operation.

• Automation Features: Includes automatic direction reset, allowing the machine to switch tape direction and play or record both sides of the tape without manual intervention.

• Inputs/Outputs: Dual microphone and high-level (line) inputs per channel, with volume and bias controls, plus separate outputs for stereo channels.

• Frequency Response: Approximately 50 Hz to 15 kHz at 7½ ips; 50 Hz to 7.5 kHz at 3¾ ips.

• Wow and Flutter: Around 0.08% at 7½ ips and 0.12% at 3¾ ips, ensuring stable pitch.

• Signal-to-Noise Ratio: Roughly 53 dB at 7½ ips, indicative of relatively low noise for the era.

• Operational Modes: Can be used vertically or horizontally, enhancing placement versatility.

• Other Features: Three-figure tape position indicator and illuminated recording button.

• Built-in Amplification: The 1150 model requires external speakers as it lacks integrated speakers, unlike some other 1100 series variants with built-in amps. Weight is approximately 27 lbs.

The Ampex 1150 was praised for its sophisticated mechanical automation paired with solid-state electronics, which delivered reliable performance and a user-friendly experience. Its automatic features allowed users to enjoy continuous playback or recording with minimal intervention. Its sound quality met high-fidelity standards for its time, making it a respected choice for home audiophiles and amateur tape recordists.

In summary, the Ampex 1150 is an automated, solid-state, quarter-track stereo reel-to-reel deck with multiple tape speeds, auto-reverse, and automatic threading, designed for high-fidelity home recording and playback with strong user convenience features.