A list of contenders:
Goldmund Telos 5000
FM Acoustics Resolution Series 2011
Sovereign Audio The Sovereign
Dynaudio Arbiter
Krell Master Reference Amplifiers
Mark Levinson No.33 Reference Monaural Amplifiers
Burmester 909 Mk.V (Internally mono bridged)
darTZeel NHB-458
Soulution Audio 700
Gryphon Audio Colosseum Solo
Jeff Rowland Design Group Model 925
Edge NL Reference Mono Amplifiers
GamuT Audio S600M Mk.III
Halcro dm88
Spectral Audio DMA-360 Reference Monaural Amplifiers Series 2
Audire The New Monarch
McIntosh Mc2KW
Boulder 2050
MBL 9011
Tube Research Labs Platinum GTR-800
Jadis JA-800
Arna-Sphere MA-3
Conrad Johnson ART
VTL Siegfried
Audio Research Reference 610T
Wavac SH-833
Kondo Gaku-On Mk.II
LAMM Industries ML-3 Signature
Convergent Audio Technologies JL-1 Limited Edition
Joule Electra VZN-350 Destiny
Shoreline 800
Ypsilon SET-1000
Pathos Acoustics Adrenaline
Goldmund Telos 5000
FM Acoustics Resolution Series 2011
Sovereign Audio The Sovereign
Dynaudio Arbiter
Krell Master Reference Amplifiers
Mark Levinson No.33 Reference Monaural Amplifiers
Burmester 909 Mk.V (Internally mono bridged)
darTZeel NHB-458
Soulution Audio 700
Gryphon Audio Colosseum Solo
Jeff Rowland Design Group Model 925
Edge NL Reference Mono Amplifiers
GamuT Audio S600M Mk.III
Halcro dm88
Spectral Audio DMA-360 Reference Monaural Amplifiers Series 2
Audire The New Monarch
McIntosh Mc2KW
Boulder 2050
MBL 9011
Tube Research Labs Platinum GTR-800
Jadis JA-800
Arna-Sphere MA-3
Conrad Johnson ART
VTL Siegfried
Audio Research Reference 610T
Wavac SH-833
Kondo Gaku-On Mk.II
LAMM Industries ML-3 Signature
Convergent Audio Technologies JL-1 Limited Edition
Joule Electra VZN-350 Destiny
Shoreline 800
Ypsilon SET-1000
Pathos Acoustics Adrenaline