Power amplifier
below typical
Among the 25 power amplifiers in the catalogue, this one is below typical.
A band places a component against its peers and carries no price. It is deliberately the only price indicator on this page: a second one, measured against a different set, would narrow the two together far enough to give the figure away.
CRITICAL FEATURE: rear-panel pushbutton selects "bridge mode" — pair of 303s in bridged-mono delivers 140W/8Ω each (single-channel), matching the Artera Stereo's stereo rating. Synchronisation is cabled via mini-jack between units. See Quad-303-Bridged for monoblock-pair catalogue entry.
Voicing — Signals Hi-Fi (Dec 2025): "definitely a Quad. Slightly warmer than average in balance but clean and tidy too. It's very refined with what people refer to as a silky quality." AVForums commenter (after upgrading Artera Pre/Power → 33/303): "33/303 outdid my Artera pre/power in soundstage and bass performance. Added a 2nd 303, performance is now off the scale." Voicing camp: warm/harmonic, with the classic Quad lineage character.
Assessed against 19 rivals across the sixty systems: 6 head-to-heads won, 54 lost.
The dimension the engine names as the weakest link, counted across every head-to-head it lost.
13 lost · Anchored, Artisan, Characterful, PRaT, Reference, Romantic
Against the Anchored brief, the Longdog Audio P6100M Biamp 2x2 (4 units) keeps the slot decisively.
With the Emmae Reginae (custom), the pairing gives up most on bass control.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
Quad 303 reissue, classic Walker designQuad 303 (2024 reissue) + heritage
7 lost· 1 won · Artisan, Cavity-Native, Characterful, Intimate, PRaT, Reference, Romantic, Silent Path
Against the Characterful brief, the NVA S80 Stereo keeps the slot decisively.
With the NVA P50 MKII, the pairing gives up most on vocal presence.
With the Neat Iota 2, the pairing gives up most on timing and drive.
On its own merits the Quad 303 is the stronger power amplifier — but it loses here on fit: the pairing with the NVA P50 MKII gives up vocal presence under the Characterful weighting.
2x56W... sufficient headroomHi-Fi News Lab (Miller) 2025
5 lost · Anchored, Characterful, PRaT, Romantic, Silent Path
Against the Characterful brief, the Audiolab 9000P keeps the slot decisively.
With the Neat Petite Classic, the pairing gives up most on timing and drive.
With the Audiolab 9000Q, the pairing gives up most on vocal presence.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
2x56W... sufficient headroomHi-Fi News Lab (Miller) 2025
4 lost · Cavity-Native, Characterful, Romantic
Against the Cavity-Native brief, the Leema Hydra II keeps the slot decisively.
With the Emmae Reginae (custom), the pairing gives up most on bass control.
With the Leema Neutron, the pairing gives up most on vocal presence.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
Quad 303 reissue, classic Walker designQuad 303 (2024 reissue) + heritage
4 lost · Artisan, Cavity-Native, Intimate, Reference
Against the Intimate brief, the NVA S300 Stereo (Artisan) keeps the slot decisively.
With the NVA P50SA MKII, the pairing gives up most on vocal presence.
With the ProAc Tablette 10 Signature, the pairing gives up most on timing and drive.
On its own merits the Quad 303 is the stronger power amplifier — but it loses here on fit: the pairing with the NVA P50SA MKII gives up vocal presence under the Intimate weighting.
2x56W... sufficient headroomHi-Fi News Lab (Miller) 2025
3 lost· 1 won · BBC Sound, Twin Arms
Against the Twin Arms brief, the Sugden ANV 50 keeps the slot decisively.
3 lost · Intimate, Silent Path
Against the Silent Path brief, the Audio Note P1 SE keeps the slot by a whisker.
With the Emmae Reginae (custom), the pairing gives up most on low-level clarity.
With the Music First Audio Baby Reference V2, the pairing gains most on quietness at rest.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
92.1dB A-wtd S/NHi-Fi News Lab (Miller) 2025 (reissue)
3 lost · BBC Sound, Vocals-First
No completion of this shape fits that slot's budget.
3 lost · Artisan, PRaT, Reference
Against the Artisan brief, the Exposure XM9 Biamp 2x2 (4 units) keeps the slot decisively.
With the Emmae Reginae (custom), the pairing gives up most on timing and drive.
With the Exposure 3510 Preamplifier, the pairing gives up most on vocal presence.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
2x56W... sufficient headroomHi-Fi News Lab (Miller) 2025
2 lost · Intimate
Against the Intimate brief, the EAR Yoshino 890 keeps the slot decisively.
With the EAR Yoshino 868L (Line), the pairing gives up most on midrange truth.
With the Emmae Reginae (custom), the pairing gives up most on low-level clarity.
On its own merits the Quad 303 is the stronger power amplifier — but it loses here on fit: the pairing with the EAR Yoshino 868L (Line) gives up midrange truth under the Intimate weighting.
1 lost· 2 won · Vocals-First
No completion of this shape fits that slot's budget.
1 lost · Cavity-Native
Against the Cavity-Native brief, the Chord ULTIMA 6 keeps the slot decisively.
With the Emmae Reginae (custom), the pairing gives up most on bass control.
On its own merits the Quad 303 is the stronger power amplifier — but it loses here on fit: the pairing with the Emmae Reginae (custom) gives up bass control under the Cavity-Native weighting.
It sits well below the share of the budget this brief aims at the power amplifier position.
Quad 303 reissue, classic Walker designQuad 303 (2024 reissue) + heritage
1 lost · Anchored
Against the Anchored brief, the Longdog Audio P6100M (pair) keeps the slot decisively.
With the Neat Petite Classic, the pairing gives up most on bass weight.
With the NVA P50SA MKII, the pairing gives up most on depth of bass.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
3Hz-20kHz within -0.15dBHi-Fi News Lab (Miller) 2025
1 lost · Twin Arms
No completion of this shape fits that slot's budget.
1 lost · Vocals-First
No completion of this shape fits that slot's budget.
1 lost · BBC Sound
No completion of this shape fits that slot's budget.
1 lost · Silent Path
Against the Silent Path brief, the Quad Artera Stereo keeps the slot by a whisker.
On its own merits the Quad 303 is the weaker power amplifier for that brief.
0 lost· 1 won · Twin Arms
Against the Twin Arms brief, the Quad 303 takes the slot by a whisker.
0 lost· 1 won · BBC Sound
Against the BBC Sound brief, the Quad 303 takes the slot clearly.
Quad 303 reissue, classic Walker design Quad 303 (2024 reissue) + heritage· Bass control
92.1dB A-wtd S/N Hi-Fi News Lab (Miller) 2025 (reissue)· Electrical noise floor
3Hz-20kHz within -0.15dB Hi-Fi News Lab (Miller) 2025· Bass extension
2x56W... sufficient headroom Hi-Fi News Lab (Miller) 2025· Dynamic coherence
| is monoblock | False |
|---|---|
| is balanced internal | True |
| power class | AB |
| power 8ohm w | 50.0 |
| power 4ohm w | 85.0 |
| damping factor | 25.0 |
| accepts rca | True |
| accepts xlr | True |
| accepts din | False |
| input impedance rca kohm | 15.0 |
| input impedance xlr kohm | 22.0 |
| input sensitivity rca mv | 700.0 |
| speaker terminal type | binding post |
| gain db | 30.0 |
| snr db | 100.0 |
| thd pct | 1.0 |
| dimensions mm | 258/110/240 |
| weight kg | 8.0 |
| sold as pair | False |
| notes |