Akai AP-B21

The Akai AP-B21 is a semi-automatic, 2-speed belt-drive turntable produced in Japan around 1982. It is designed to offer reliable operation with a focus on smooth, quiet playback and ease of use.

Technical Overview

Drive and Motor:

• Belt drive system with auto-return function.

• Motor: 4-pole synchronous motor designed for improved rotation accuracy and quiet operation.

• Speeds supported: 33⅓ and 45 rpm.

• Wow and flutter: 0.05%, providing stable speed with minimal pitch variation.

• Rumble: 65 dB, indicating low background noise.

Platter:

• Heavy die-cast aluminum alloy platter for low resonance and smooth rotation.

• Diameter: approximately 300 mm.

Tonearm:

• J-shaped static balanced tonearm with inside force canceller (anti-skating).

• Effective length: 220 mm.

• Overhang: 15 mm.

• Shell weight: 7 grams.

• Arm lifter is oil-damped for smooth stylus placement.

• Cartridge weight range: 4 to 9 grams.

• Typically fitted with a VM (moving magnet) dual magnet cartridge, such as the Akai PC-85 or Audio-Technica AT95E.

Construction and Dimensions:

• Solid chassis with large damped insulator feet to reduce acoustic feedback.

• Dimensions: 440 mm (W) x 135 mm (H) x 355 mm (D).

• Weight: approximately 5.9 kg.

• Includes a dust cover.

Additional Features:

• Pitch control ±5% for fine speed adjustment.

• Removable headshell allowing cartridge upgrades.

• Known for clear, bright sound with good mids and bass.

• Suitable for casual listening and entry-level audiophile use.

• Replacement parts like belts and stylus are readily available.