Akai AP-D40

The Akai AP-D40 is a fully automatic, direct-drive turntable produced in Japan between 1981 and 1983, known for its solid build and reliable performance.

Technical Overview

Drive and Motor:

• Direct drive system with DC servo motor.

• Speeds supported: 33⅓ and 45 rpm.

• Wow and flutter: 0.05%, indicating stable speed control.

• Rumble: 70 dB, reflecting low background noise.

Platter:

• 314 mm aluminum alloy die-cast platter designed for smooth rotation and low resonance.

• Includes a rubber mat with an indicator groove at the center.

Tonearm:

• S-shaped static balanced tonearm.

• Effective length: 220 mm.

• Cartridge weight range: 4 to 12 grams.

• Oil-damped arm lifter for smooth stylus placement.

• Overhang: 15 mm.

• Equipped with anti-skating mechanism.

Operation and Features:

• Fully automatic operation including auto start, stop, and return.

• Pitch control with adjustable speed range (some sources mention ±10% pitch control).

• Built-in stroboscope lamp for speed verification.

• Compatible with a wide range of cartridges; factory-fitted with an Akai magnetic cartridge.

• Front panel controls for ease of use.

Construction and Dimensions:

• Dimensions: approximately 440 mm (W) x 140 mm (H) x 403 mm (D).

• Weight: around 5.5 kg.

• Solid chassis with dust cover included.

• Available in silver or anthracite finishes.

Additional Notes:

• The turntable is praised for its durability and ease of maintenance.

• Capacitors may require replacement over time to maintain speed stability.

• Some units may have issues with broken weights or worn parts but are generally serviceable.