Quad 3CDT CD Transport

A dedicated CD transport with high-precision disc retrieval, isolated digital circuitry, a TCXO master clock, and coaxial and optical outputs

The Quad 3CDT is a dedicated CD transport designed to retrieve the digital signal from compact discs with accuracy and stability. Rather than building in unnecessary circuitry, the 3CDT focuses on the mechanical and digital stages of disc playback, sending a clean digital output to an external DAC.

Designed as the natural companion to the Quad 3 integrated amplifier, the 3CDT is built to match its compact chassis, classic detailing, and DAC architecture. It will also integrate into other high-quality digital systems, providing coaxial and optical digital outputs for use with a separate digital-to-analog converter.

Accuracy and Integrity

At the center of the 3CDT is a high-precision CD mechanism with a custom CD servo control system. Quad has optimized the laser assembly and servo architecture to minimize read errors, jitter, and distortion, helping preserve the integrity of the original CD signal.

Power and Clock Architecture

The internal power architecture separates the motor and laser servo circuits from the decoder stage that retrieves the digital audio signal. A temperature-controlled ultra-low-jitter crystal oscillator provides the master clock for the servo and decoder section, with its own independent low-noise supply and grounding scheme.

Three independent low-noise voltage regulator circuits are dedicated to the CD servo, while the TCXO clock circuit is powered by an ultra-low-noise linear regulator. The advanced CD servo and control architecture uses a dual-core processing framework with a high-performance 32-bit RISC CPU and dedicated MCU for servo control, disc access, and error correction.

Quad 3 Synergy

When partnered with the Quad 3, the 3CDT offloads digital-to-analog conversion to the amplifier’s DAC architecture. This keeps the transport focused on clean digital retrieval and output, while the Quad 3 handles conversion and amplification in a visually and functionally matched system.

Classic Design, Modern Execution

The 3CDT mirrors the design language of the Quad 3, with a compact chassis, understated styling, and classic Quad detailing. Internally, the transport mechanism is shielded against vibration and electrical interference, with attention paid to durability, quiet operation, and digital signal integrity from the disc tray through the outputs.

Multi-Format Playback

In addition to standard CD playback, the 3CDT supports CD-R, CD-RW, and data CDs, with playback of FLAC, WAV, WMA, MP3, and APE files.

About Quad

Founded in London in 1936 by Peter Walker, Quad has built its reputation on disciplined engineering, practical design, and the enduring goal Walker described as “the closest approach to the original sound.” Originally focused on amplifiers and public-address equipment, the company moved to Huntingdon, Cambridgeshire, in 1941, where Quad’s British engineering, service, and development remain centered today.

Quad’s history includes some of the most important products in British hi-fi, from the Quad II amplifier and the 33/303 preamp and power amplifier combination to the 405 current-dumping amplifier. In 1957, Quad introduced the world’s first production full-range electrostatic loudspeaker, establishing a loudspeaker lineage that continues through generations of ESL designs.

Today, Quad continues to balance heritage and renewal, developing electronics and loudspeakers that respect the company’s classic design values while addressing modern listening habits. Across its amplifiers, digital components, and loudspeakers, Quad remains defined by clarity, restraint, and engineering purpose.

Features

• Dedicated CD transport designed for use with an external DAC
• High-precision CD mechanism
• Custom-designed CD servo control system
• Laser and servo architecture optimized to reduce read errors, jitter, and distortion
• Internal power architecture separates the motor and laser servo circuits from the decoder stage
• Temperature-controlled ultra-low-jitter crystal oscillator master clock
• Independent low-noise supply and grounding scheme for the TCXO clock
• Three independent low-noise voltage regulator circuits for the CD servo
• Ultra-low-noise linear regulator for the TCXO clock circuit
• Dual-core servo and control architecture with 32-bit RISC CPU and dedicated MCU
• Coaxial and optical digital outputs
• Illuminated 10.9 × 159 mm full-view LCD display
• Remote control functionality
• Supports CD, CD-R, CD-RW, and data CDs
• Supports FLAC, WAV, WMA, MP3, and APE file formats

Specifications

Compatible Disc Types: CD, CD-R, CD-RW

Compatible File Formats: FLAC, WAV, WMA, MP3, APE

Display: Illuminated 10.9 × 159 mm full-view LCD

Digital Output Interface: 1 coaxial, 1 optical

Digital Output Amplitude: 500 ±50 mVpp

Output Impedance: 75 ohms

Sampling Rate: 44.1 kHz

Standby Power Consumption: <0.5 W

Dimensions (HLW): 3.98" × 11.81" × 11.81" (101 × 300 × 300 mm)

Weight: 11.84 lb. (5.37 kg)