Quad 33

QUAD 33 Preamplifier – Iconic Design and Cutting-Edge Technology

The QUAD 33 is a modern reinterpretation of the famous preamplifier launched in 1967, a true tribute to the classic QUAD model that marked the history of hi-fi. This solid-state preamplifier maintains the unmistakable “Industrial” design that made QUAD a legendary brand, with a compact chassis that recalls the vintage style of the original model, enriched by a modern LCD display and orange LED backlit buttons.

Technical Characteristics

• Analog Circuitry and Digital Control: The QUAD 33 combines 100% analogue electronics with a digital microprocessor for function control, ensuring precise and uncompromising regulation.
• Linear Power Supply with Custom Transformer: The power supply features a custom-made ultra-low-noise toroidal transformer, five regulation rails and ultra-low-noise capacitors for clean and stable power.
• Optimized Signal Paths: Signal paths are designed to be very short and direct, preserving the integrity of the sound and minimizing any possible interference.

Advanced Adjustment Functions

• Motorized ALPS Volume Control: Equipped with an ALPS precision potentiometer, it allows for smooth and precise volume adjustment, with the possibility of remote control.
• Audiophile adjustments for Bass, Tilt and Balance: Thanks to three rotary encoders, the QUAD 33 allows you to adjust bass, tilt and balance in a meticulous manner, preserving the tonal and harmonic purity of the signal.
• Integrated MM/MC Phono Stage: It features a high-performance phono preamplifier for MM and MC cartridges, with high gain (63,5 dB for MC and 46 dB for MM), making it ideal for vinyl enthusiasts.

Outputs and Connectivity

• Multiple Stereo Inputs and Outputs: The QUAD 33 offers a wide range of connections, including balanced XLR inputs, unbalanced RCA inputs and a selectable MM/MC phono input.
• Versatile Outputs: Includes balanced XLR and unbalanced RCA outputs (Pre-Out and AUX), plus a headphone output with Current-Feedback amplification, compatible with impedances from 20 to 600 Ohm.
• Trigger and LCD Display: Two 12V trigger ports allow for integration with other devices, while the backlit LCD display makes it easy to manage settings.

Impeccable Audio Performance

• Frequency Response and Minimum Distortion: With a linear frequency response from 20 Hz to 20 kHz and a total harmonic distortion (THD) of less than 0,0005% (Line RCA/XLR) and 0,002% (Phono MM/MC), the QUAD 33 guarantees faithful and detailed reproduction.
• High Signal to Noise Ratio: Ensures minimal noise level with a S/N Ratio higher than 108 dB (Line RCA/XLR), 82 dB (Phono MM) and 74 dB (Phono MC).

General Specifications

• Finishing and Dimensions: Available in the classic QUAD Grey colour, the QUAD 33 measures 258 x 83 x 165 mm, weighs 4 kg, and comes with a remote control for convenient use.

With the QUAD 33, technological innovation meets audiophile tradition to offer a superior sound experience, faithful to the original sound but projected into the future.