Quad 303

Quad 303 on maineikkaan, yli 50 vuotta sitten julkaistun päätevahvistimen uusi, moderni painos tämän päivän tekniikalla ja komponenteilla päivitettynä. Yhdessä 33-etuvahvistimen kanssa Quad 303 muodostaa upea-äänisen ja ajattoman tyylikkään vahvistinasteen kohtuuhinnalla.

Class AB-luokan toteutus laatukomponenteilla. Jatkuva teho 2x50W 8ohm ja 2x70W 4ohm. Sillattuna (mono) teho 1x140W 8ohm ja 1x170W 4ohm. RCA-sisäänmeno ja balansoitu XLR-sisääntulo.

Very few Hi-Fi components are as instantly recognisable as the QUAD 33 and 303, and for that we make no apologies.

Still one of the most popular models in the history of one of the world’s most poignant Hi-Fi brands, the QUAD 33 and 303 are benchmarks in almost every angle of desirable audio equipment – performance, reliability, industrial design, value and musical romance.

A dream team of Rob Flain & Paul McConville (the world’s most experienced QUAD service engineers), Jan Ertner (30 years of experience in QUAD design), Peter Comeau (the acoustic director behind some of QUAD’s most successful loudspeakers) and David McNeill (the industrial designer responsible for two decades of QUAD innovations) were all a part of this labour of love, making no compromise in the demand for a product that could bear the name of 33 and 303.

Always respected for its conservative but consistent power-output, the classic QUAD 303 was officially rated at 45W @ 8 ohms. A modest but honest output, the 303’s venerability is in the finesse of the performance, not just the raw power. The new model is thoroughly the same.

However, with some tweaking and enhancements, the 303 is loaded with a little extra power – offering 50W @ 8 ohms (70W @ 4 ohms) with a maximum current delivery of 10A into difficult loads. The original 303 was known to have issues with lower impedance loads, the new 303 has no such trouble. Perfectly suited to the more demanding requirements of the modern audiophile, it ensures any speakers – even including QUAD’s electrostatic designs – can be driven with ease. Connectivity options comprise single-ended RCA and balanced XLR inputs, a 12V trigger input and high-quality speaker binding posts. Simple, solid and thoroughly authentic, inside and out. The power output for ’bridged mode’ (for use as a mono-block power amplifier) reaches 140W @ 8 ohms or 170W @ 4 ohms (bridged mono).

Due to the lack of complementary transistors (NPN and PNP power transistors) in earlier times, the older QUAD 303 used a quasi-complementary output stage. The new version of the QUAD 303 now uses a fully complementary output stage, providing better linearity, more stable static bias, and improved stability under high voltage and large current conditions. Using premium power transistors, the 303 offers excellent gain linearity for accurate reproduction of the input signal with greater dynamic range.

The amplifier cannot be upset even when overdriven by an asymmetrical signal or by shorting or disconnecting the loudspeakers.

A brand new 200VA, custom-specified, low-noise toroidal transformer has been developed for the new 303.

The output stage of the discrete power amplifier circuit employs an advanced feedback topology to ensure superior linearity and exceptional thermal stability. Through its Class AB design, the ideal current is maintained independently of the temperature of the output transistors.

The result is a compact, cool-running power amplifier that possesses the capacity to deliver dynamic power and maintain a firm hold on the music while providing rich sonic detail.

” Preis/Leistung: Uberragend ” AUDIO STEREOPLAY (1/2025)

” Outstanding Product. These units sound ”huge” in the very literal sense. The 33 / 303 is a charmer, and Peter Walker would be proud. I am buying a set as my mid-priced reference. What more can I say? ” Ken Kessler / HI-Fi NEWS (Jan 2025)

” When the Quads arrived, I fell for their looks, By the time they left, I had fallen for their performance. Highly recommended. ” – 33 / 303 – HI-FI+ (Feb 2025)

” When the Quads arrived, I fell for their looks. By the time they left, I had fallen for their performance. These are a first-class, carefully conceived, and brilliantly executed homage to Quad’s illustrious history but should appeal equally to those unfettered by the remembrance of times past and are highly recommended.” -Quad 33 & 303- The Absolute Sound (Nov 2025)

QUAD paitsi palaa yhteen hifin historian ikonisimmista järjestelmistä myös kunnioittaa Peter Walkerin alkuperäisiä suunnitelmia samalla kun se on kehittänyt suorituskyvyn vastaamaan tämän päivän audiofiilien odotuksia – tämä on vintage-uudelleenjulkaisu juuri niin kuin sen kuuluukin olla. QUAD 303 -vahvistin tarjoaa lisää ab-luokan tehoa, mikä sopii paremmin nykyaikaisille kaiuttimille, sekä mahdollisuuden liittää toinen vahvistinyksikkö parempaa ohjausta ja tehoa varten. Samaan aikaan 33-esivahvistimeen on tehty päivityksiä liitettävyydessä ja käyttömukavuudessa. Yhdessä QUADin vahvistimet luovat laajan, tarkan ja yksityiskohtaisen äänikuvan, joka vangitsee kuuntelijan. Tämä on aidosti toimiva uudelleenlämmittely järjestelmälle, joka ilahduttaa sekä vanhoja että uusia audiofiilejä.

” Oman luokan referenssi. ” – yhdessä Quad 33-etuvahvistimen kanssa – HIFIMAAILMA (5/2025)

Voit ottaa yhteyttä alla olevalla lomakkeella tai soittamalla numeroon 03 2130 750. Vastaamme puhelimeen myymälän aukioloaikoina. Tarkista aukioloajat täältä.

Specifications

Model	QUAD 303
General Description	Power Amplifier
Design Philosophy and Core Technology	Class AB Power Amplifier QUAD 303 Triples Output Stage Custom 200VA Toroidal Transformer Stereo/Bridge mode selection
Inputs	1 x Line, 1 x XLR
Outputs	1 x 12V Trigger 1 x Stereo Speaker, 1 x 12V Trigger (Link)
Power Amplifier Section
Gain	+29dB
Rated Power Output	Stereo: 2 x 50W (8 ohms, THD<1%) Stereo: 2 x 70W (4 ohms, THD<1%) Bridged: 140W (8 ohms, THD<1%) Bridged: 170W (4 ohms, THD<1%)
Frequency Response	20Hz – 20kHz (+/-0.3dB)
Total Harmonic Distortion (THD)	<0.002% (1kHz)
Input Impedance	10k ohms
Input Sensitivity	700mVrms (Line) 1.5Vrms (XLR)
Signal-to-Noise Ratio (S/N)	> 108dB (A – weighted)
Max. Output Current	10A
General
Standby Power Consumption	<0.5W
Net Weight	8.4kg
Gross Weight	9.5kg
Dimensions (mm) (W x H x D)	120 x 176 x 325
Carton Size (mm) (W x H x D)	226 x 312 x 462
Finish	Classic QUAD Grey
Power Requirements (depending on region)	220 – 240V – 50 / 60Hz 100 – 120V – 50 / 60Hz
Standard accessories	Power Cord, Remote Control, User Manual

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