ADC Accutrac 4000

The ADC Accutrac 4000 is a sophisticated direct-drive turntable that combines advanced technology with user-friendly features, making it a notable choice for audiophiles. Introduced in the late 1970s, this model is particularly recognized for its programmable track selection and computerized memory bank, allowing for precise control over playback.

Key Specifications

• Drive System:Type: Direct-drive
  Motor: Low-speed electronically controlled DC brushless motor
  Build-Up Time: Achieves full speed within 2 seconds
  

• Speed Options:Supports playback at 33 1/3 RPM and 45 RPM
  Variable Pitch Control: ±5% adjustment for fine-tuning playback speed
  

• Platter:Material: Die-cast aluminum alloy
  Diameter: 306.4 mm
  Weight: Approximately 1.4 kg
  Design: Dynamically balanced to minimize vibrations during playback
  

• Performance Metrics:Wow and Flutter: Less than 0.03% WRMS
  Rumble: Better than -70 dB, indicating low background noise
  

Tonearm

• Type: Tubular S-shaped tonearm with static balance design

• Effective Length: 237 mm

• Overhang: 15 mm

• Offset Angle: 21 degrees

• Tracking Force Range: Adjustable from 0 to 4 grams

• Cartridge Compatibility: Designed to work with the ADC LMA-1 low mass induced magnet cartridge

Cartridge Specifications

• Output Voltage: 3.5 mV at a tracking force of 5.5 cm/sec

• Tracking Force Range: Recommended between 0.75 to 1.5 grams

• Frequency Response: Ranges from 10 Hz to 24 kHz

• Channel Separation: Approximately 28 dB

• Load Resistance: Standard at 47 kΩ

• Stylus Tip Type: Nude elliptical diamond (0.0003" x 0.0007")

Unique Features

• Programmable Track Selection: Users can program the order of tracks for playback, allowing for customized listening experiences.

• Remote Control Operation: The turntable includes a wireless remote control, enabling users to operate it from a distance, including functions like track selection and playback modes.

Build Quality

The ADC Accutrac 4000 features a sturdy chassis designed to minimize resonance and vibrations, enhancing overall sound quality. Its dimensions are approximately 470 x 441 x 152 mm, with a weight of about 9 kg, providing a solid foundation during operation.

Performance Characteristics

The ADC Accutrac 4000 is praised for its reliable performance, ease of use, and advanced features. The direct-drive system ensures consistent speed control, while the programmable capabilities cater to modern listening habits, making it an appealing option for vinyl enthusiasts.

Conclusion

The ADC Accutrac 4000 turntable stands out as a significant advancement in turntable technology, offering features that enhance both convenience and sound quality. Its combination of direct-drive performance, programmable functionality, and solid construction makes it an excellent choice for those seeking a high-quality vinyl playback experience.