QUAD 33 Preamplifier

Quad 33 Preamplifier A Modern Classic Design The QUAD 33 preamplifier continues QUAD’s tradition of practical simplicity while embracing modern features. Its sleek fascia and anodised finish highlight heritage with a contemporary edge. A backlit LCD display, subtle LED illumination, and remote control add convenience. Despite these updates, the unmistakable QUAD look remains, creating a timeless design suitable for any high-end audio system. Inputs Built on a classic analogue foundation, the QUAD 33 now incorporates digital microprocessor control for precision. It offers fully balanced XLR inputs and outputs, RCA pre-outs, and an AUX output for versatile connectivity. A new phono stage supports MM and MC cartridges, expanding options for vinyl enthusiasts. Dedicated stereo pre-outs feed power amplifiers directly, delivering uncoloured audio with clarity. Controls Controls are simple yet comprehensive. The backlit LCD screen displays settings clearly, while illuminated push buttons show input selection and mode. The motorised ALPS master volume potentiometer provides tactile precision and responds automatically via the remote control. Three rotary encoders allow instant access to fine-tuning, including bass adjustment, tilt control, and balance, preserving natural harmonic range. Performance The QUAD 33 advances technical performance with a low-noise toroidal transformer, multiple reservoir capacitors, and five regulated supply rails. Ultra-low-noise regulators prevent contamination, and a short, direct signal path preserves audio purity. Volume remains fully analogue under microprocessor control. Rigorous testing by QUAD’s design and service teams ensures it surpasses the original 33 in both accuracy and fidelity. Finish Every detail reflects meticulous craftsmanship. The rigid housing, precise machining, and custom tooling demonstrate quality from every angle. The QUAD 33 represents a faithful evolution of the original concept, balancing tradition with modern performance. It stands as a modern classic, blending past legacy with contemporary innovation. Click to see our showroom tour ModelQUAD 33 General DescriptionPre Amplifier Design Philosophy and Core TechnologyIlluminated LCD screen; Dedicated High Performance Low Noise MM/MC Phono stage; Classic QUAD 'Tilt' adjustment; Classic QUAD Tone Controls; Dedicated Current-Feedback Headphone Amplifier Inputs3 x RCA, 1 x Balanced XLR (pair), 1 x Phono (MM/MC switchable) Outputs1 x RCA (AUX), 1 x XLR, 1 x RCA (Pre Out), 1 x Headphone, 2 x 12V Trigger Out Pre Amplifier Gain0dB (Line/XLR), 46dB (Phono MM), 63.5dB (Phono MC) Input Sensitivity (Vout=695mV)695mV (Line/XLR), 3.2mV (Phono MM), 460µV (Phono MC) Input Impedance10kΩ (Line/XLR), 47kΩ/100pF (Phono MM), 100Ω/1.7nF (Phono MC) Total Harmonic Distortion (THD)<0.0005% (1kHz, Line/XLR), <0.002% (1kHz, Phono MM/MC) Frequency Response20Hz - 20kHz ( /-0.2dB) Signal-to-Noise Ratio (S/N)>108dB (A-weighted, Line/XLR), >82dB (A-weighted, Phono MM), >74dB (A-weighted, Phono MC) Output Impedance120 ohms Headphone Amplifier THD<0.01% (1kHz, 50mW) Headphone Output Impedance2.35 ohms Headphone Load Impedance20 - 600 ohms Standby Power Consumption<0.5W Net Weight4kg Gross Weight4.96kg Dimensions (W x H x D)258 x 94 x 165 mm Carton Size (W x H x D)330 x 192 x 257 mm FinishClassic QUAD Grey Power Requirements220 - 240V, 50/60Hz; 100 - 120V, 50/60Hz Standard AccessoriesPower Cord, Remote Control, User Manual