What it is
NEW ENTRY (2026-05-12) per Tier 1 currency audit. Audio Note (UK) P4 Balanced Tonmeister — Level 3 parallel-300B mono power amplifier pair with hand-wound balanced input transformers and interstage transformer coupling. The "Tonmeister" designation indicates the no-capacitor-coupling design philosophy (Audio Note official: "this clever but difficult to execute design philosophy allows the number of deleterious parts in the signal path to be reduced, simplifying the circuit and dramatically lowering colouration and improving transparency"). Hand-built Hove, East Sussex.
POSITION IN AN UK MONO RANGE: Above Conqueror stereo (8W single 300B SE), Quest mono (8W single 300B SE pair), Conquest mono (18W parallel 300B PSE pair); below Empress mono (parallel 2A3), Shinri/Neiro/Kassai mono pairs, Ginrei mono pair (Level 4, 45W parallel 211). The P4 Balanced Tonmeister is positioned as the FULLY-CONTAINED most powerful AN UK Level 3 monoblock — i.e. the most power without exposed valves (per Deco Audio framing).
INPUT COMPATIBILITY: 2.4kΩ balanced input impedance is LOWER than typical (most active preamps drive 10-50kΩ loads). The relatively low input Z is due to the AN UK input transformer step ratio. Reliable partners: Naim NAC 332 (true balanced output, 50Ω output Z), Naim NSC 222 (XLR output, single-ended but adequate drive), Audio Note M3 Phono/Line Balanced (XLR via output transformer), Audio Note higher M-series. Passive preamps with simple resistor attenuators may struggle to drive 2.4kΩ — verify drive capability before pairing.
ELECTRICAL FIT: 18W parallel-SE output mandates ≥90dB sensitivity speakers. Excellent partners: AN-E SPe HE (98dB), AN-J (94dB), Klipsch Heritage. POOR partners: LS3/5a derivatives (83-84dB) — P4 BT cannot reach typical listening SPL with them. In cavity-constrained context: NO cavity-eligible speaker meets the 90dB+ requirement (highest is Neat Petite Classic 87dB). The architectural Audio-Note-system tension applies fully to P4 BT.
Who it comes up against
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.
With the Audiolab 9000Q, the pairing gains most on depth of bass.
On its own merits the Audio Note P4 Balanced Tonmeister (pair) is the weaker pair of monoblocks for that brief.
natural harmonicsPROXY: Audio Note SET house
4 lost · BBC Sound, Twin Arms
No completion of this shape fits that slot's budget.
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 clearly.
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 Audio Note P4 Balanced Tonmeister (pair) is the weaker pair of monoblocks for that brief.
only matched in terms of dynamicsStereo Magazine 2021
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.
On its own merits the Audio Note P4 Balanced Tonmeister (pair) is the weaker pair of monoblocks for that brief.
natural harmonicsPROXY: Audio Note SET house
2 lost · Vocals-First
No completion of this shape fits that slot's budget.
2 lost · Characterful, Romantic
Against the Characterful 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 Audio Note P4 Balanced Tonmeister (pair) is the weaker pair of monoblocks for that brief.
Hydra II reference Leema stereo power ampLeema Hydra II positioning
1 lost· 2 won · Intimate, Silent Path
Against the Silent Path brief, the Audio Note P4 Balanced Tonmeister (pair) takes the slot clearly.
With the Music First Audio Baby Reference V2, the pairing gains most on quietness at rest.
On its own merits the Audio Note P4 Balanced Tonmeister (pair) is the weaker pair of monoblocks — yet it wins here on fit: the pairing with the Music First Audio Baby Reference V2 gains quietness at rest under the Silent Path weighting.
rich, warm bodyPROXY: Audio Note SET house
0 lost· 1 won · Silent Path
Against the Silent Path brief, the Audio Note P4 Balanced Tonmeister (pair) takes the slot clearly.
With the Music First Audio Baby Reference V2, the pairing gains most on low-level clarity.
On its own merits the Audio Note P4 Balanced Tonmeister (pair) is the weaker pair of monoblocks — yet it wins here on fit: the pairing with the Music First Audio Baby Reference V2 gains low-level clarity under the Silent Path weighting.