As I wrote in other threads before, the online SoundStage! Network has been measuring amplifiers for a long time now, formerly by 3rd parties (BHK Labs from Bascom H. King) and currently in house. All measurements are listed here:
https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=17&Itemid=141
I also mixed in there some amplifiers measured by Stereophile.
https://www.stereophile.com/category/integrated-amp-reviews
https://www.stereophile.com/category/solid-state-power-amp-reviews
And also Stereo magazine:
https://stereo-magazine.com/
And some datasheets of complete amp modules (ICEPower, Hypex, Pascal).
I wanted to compare these to the ASR standard measurements: SINAD at 5W in 4 ohms, and power at 1% THD+N in 4 ohms. So I chose some amplifiers that interested me more (let me know if you wish I can add more), read their graphs, converted to SINAD, color coded and created the list below.
I hope you find as interesting as I did.
Name - THD+N (5W, 4 ohms) - SINAD (5W, 4 ohms) - power (1% THD+N, 4 ohms)
Benchmark AHB2 - 0.00013% - 118 - 210W
McIntosh Laboratory MC462 - 0.0005% - 106 - 720W
Orchard BOSC - 0.0005%? - 105 - 250W?
Purifi EVAL-1 - 0.0006% - 104 - 425W
Vera Audio P150/600 RS - 0.0007% (stereo) / 0.0008% (bridge) - 103 (stereo) / 102 (bridge) - 300W? (stereo) / 1000W? (bridge)
Accuphase P-4500 - 0.001% - 100 - 228W
Accuphase A-47 - 0.001% - 100 - 170W
Arcam P49 - 0.001% - 100 - 343W
Devialet 110 - 0.001% - 100 - 163W
Devialet Expert 210 Pro Dual - 0.001% - 100 - 336W
Marantz PM10 - 0.001% - 100 - 423W
Mola Mola Kaluga - 0.001% - 100 - 643W
NAD M33 - 0.001% - 100 - 488W
Rotel RB-1590 - 0.001% - 100 - 640W
Hypex NCore NC122MP - 0.0012% - 98 - 125W
McIntosh Laboratory MC501 - 0.0012% - 98 - 1000W
MBL Reference 9011 monoblock - 0.0014% - 97 - 870W
Devialet D-Premier - 0.0015% - 96 - ?
Halcro dm88 Reference - 0.0015% - 96 - 525W
Hypex NCore NC502MP - 0.0015% - 96 - 500W
Classé Delta Mono - 0.0016% - 96 - 600W
Hypex NCore NC252MP - 0.0017% - 95 - 250W
CH Precision M1.1 - 0.0018% - 95 - 440W
Accuphase E-370 - 0.002% - 94 - 170W
Arcam A 39 - 0.002% - 94 - 181W
Bel Canto Design e.One REF600M - 0.002% - 94 - 658W
ICEpower 1200AS2 - 0.002% - 94 - 670W
ICEpower 125ASX2 - 0.002% (stereo) / 0.0025% (bridge)
- 94 (stereo) / 92 (brige)
- 105W (stereo) / 370W (bridge)
Marantz PM-KI - 0.002% - 94 - 271W
McIntosh MA 7900 AC - 0.002% - 94 - 204W
Parasound Halo HINT 6 - 0.002% - 94 - 241W
Primare I25 - 0.002% - 94 - 282W
Soulution 330 - 0.002% - 94 - 217W
Accuphase M-2000 - 0.0021% - 94 - 774W
Devialet Expert 130 Pro - 0.0022% - 93 - 200W
MBL 9007 - 0.0022% - 93 - 600W
Pass Laboratories XA25 - 0.0022% - 93 - 130W
Pascal M-PRO2 - 0.0023% - 93 - 800W
Soulution 710 - 0.0025% - 92 - 260W
Bel Canto e1X - 0.0026% - 92 - 530W
Cambridge Audio Edge A - 0.0026% - 92 - 230W
Audionet Max - 0.0028% - 91 - 750W
Constellation Performance Centaur II 500 - 0.0028% - 91 - 880W
Bricasti Design M15 - 0.0029% - 91 - 550W
Accustic Arts AMP II-MK4 - 0.003% - 90 - 460W
Accuphase E-480 - 0.003% - 90 - 293W
Devialet Expert 220 Pro - 0.003% - 90 - 343W
Electrocompaniet ECI 80D - 0.003% - 90 - ?
Primare A35.2 - 0.003% - 90 - 460W
PS Audio BHK Signature 300 - 0.0031% - 90 - 620W
NAD C 328 - 0.0035% - 89 - 40W
Calyx Audio Femti - 0.01% (stereo) /
0.0036% (mono) - 80 (stereo) /
89 (mono) - 107W (stereo) / 367W (mono)
Krell Evolution 600 - 0.0036% - 89 - 1190W
Simaudio Moon Evolution 860A - 0.0038% - 88 - 290W
Electrocompaniet ECI6 DX - 0.004% - 88 - 193W
Threshold T-200 - 0.004% - 88 - 220W?
CH Precision I1 - 0.0042% - 88 - 210W
Mytek Brooklyn Amp - 0.0045% - 87 - 315W
PS Audio Stellar M700 - 0.0045% - 87 - 712W
Mark Levinson No.532H - 0.0049% - 86 - 500W
Bryston 4B3 - 0.005% - 86 - 552W
Boulder Amplifiers 2150 - 0.005% - 86 - 1450W
Luxman L-590 AX II - 0.005% - 86 - 131W
Musical Fidelity M6 SI - 0.005% - 86 - 255W
Rotel Michi S5 - 0.05% - 86 - 867W
Hegel Music Systems H30 - 0.005% (stereo/mono) - 86 (stereo/mono) - 499W (stereo) / 1953W (mono)
Luxman M-900u - 0.005% (stereo) - 86 (stereo) - 638W (stereo) / 749W (mono)
Naim NAP 250 DR - 0.005% - 86 - 162W
Hegel Music Systems H590 - 0.0055% - 85 - 525W
Simaudio Moon Evolution 870A - 0.0055% (stereo) / 0.014% (mono)
- 85 (stereo) / 77 (mono)
- 543W (stereo) / 1520W (mono)
Accuphase E-260 - 0.006% - 84 - 157W
Constellation Performance Centaur II 500 - 0.006% - 84 - 1000W
Electrocompaniet AW400 - 0.006% - 84 - 655W
Hegel Music Systems H360 - 0.006% - 84 - 468W
Soulution 530 - 0.006% - 84 - 273W
Parasound Halo A31 - 0.0062% - 84 - 352W
Mark Levinson No.53 Reference monoblock - 0.0063% - 84 - 1080W
Accustic Arts Audio Mono II - 0.007% - 83 - 385W
Pass Laboratories XA200.8 - 0.007% - 83 - 480W
Peachtree Audio nova300 - 0.007% - 83 - 500W
Schiit Audio Aegir - 0.007% - 83 - 43W
Parasound Halo JC 1+ - 0.0075% - 82 - 830W
Bel Canto e.One Ref1000M - 0.008% - 82 - 1200W
Jeff Rowland Design Group Model 2 - 0.008% - 82 - 126W
Luxman L-509X - 0.008% - 82 - 220W
Rotel Michi M8 - 0.008% - 81 - 1793W
Mark Levinson No.5805 - 0.0081% - 81 - 210W
Pascal S-PRO2 - 0.0082% - 81 - 490W
AVM Ovation MA8.2 - 0.0085% - 81 - 1320W
Bel Canto Design Black - 0.009% - 81 - ?
Hegel Music Systems H160 - 0.009% - 81 - 270W
Luxman M-800A - 0.009% - 81 - 280W
Rotel RB-1090 - 0.0095% - 80 - 750W?
Moon Neo 340I - 0.01% - 80 - 166W
Marantz HD-AMP1 - 0.01% - 80 - 111W
Parasound Halo JC5 - 0.01% - 80 - 666W
Parasound Halo A 21+ - 0.011% - 79 - 620W
Classé Sigma 2200i - 0.012% - 78 - 410W
NAD D 3020 - 0.012% - 78 - 68W
Constellation Inspiration Stereo 1.0 - 0.013% - 78 - 480W
NAD Masters Series M22 - 0.013% - 78 - 400W
Pass Labs INT-25 - 0.013% - 78 - 50W
Anthem Statement M1 - 0.015% - 76 - 2120W
Moon 600i V2 - 0.015% - 76 - 210W
Schiit Audio Ragnarok 2 - 0.015% - 76 - 100W
NAD Masters Series M32 DirectDigital - 0.015% - 76 - 190W
GamuT Di150 LE - 0.016% - 76 - 400W
MBL Corona C15 monoblock - 0.016% - 75 - 520W
Anthem Electronics STR - 0.017% - 75 - 400W
Creek Evolution 100A - 0.017% - 75 - 180W
Harman Kardon HK 990 - 0.017% - 75 - 300W
Mark Levinson No.585 - 0.017% - 75 - 390W
Krell K-300i - 0.018% - 75 - 300W
Cambridge Azur 851A - 0.019% - 74 - 220W
Ayre Acoustics MX-R Twenty - 0.02% - 74 - 595W
Chord SPM 14000 Ultimate - 0.02% - 74 - 980W
Emotiva XPA Gen3 - 0.02% - 74 - 520W
Cary Audio SI-300.2d - 0.021% - 74 - 500W
Krell Solo 575 - 0.021% - 74 - 940W
Parasound Halo A23+ - 0.022% (stereo) - 73 - 275W
Pass Laboratories XA60.8 - 0.022% - 73 - 240W
Krell FBI - 0.023% - 73 - 667W
Bel Canto Design Black ACI 600 - 0.025% - 72 - 515W
Mark Levinson No.536 - 0.025% - 72 - 800W
Moon by Simaudio Neo 340i - 0.025% - 72 - 200W
Moon by Simaudio 888 - 0.025% - 72 - 1300W
Jeff Rowland Design Group Model 1 - 0.028% - 71 - 140W
Verity Audio Monsalvat Amp-60 - 0.028% - 71 - 145W
B.M.C. Audio Amplifier C1 - 0.029% - 71 - 275W
AVM A 6.2 Master Edition - 0.03% - 70 - 298W
NAD Masters Series M10 - 0.03% - 70 - 295W
Simaudio Moon 400M - 0.03% - 70 - 618W
T+A PA 3000 HV - 0.03% - 70 - 460W
Ayre Acoustics VX-5 - 0.038% - 68 - 286W
Pass Laboratories INT-60 - 0.04% - 68 - 125W
Krell KAV-400xi - 0.046% - 67 - 350W
Nagra Classic Amp - 0.06% - 64 - 121W
Ayre Acoustics EX-8 - 0.07% - 63 - 125W
Musical Fidelity Nu-Vista 800 - 0.07% - 63 - 500W
Parasound Halo Integrated - 0.072% - 63 - 270W
Dan D'Agostino Momentum monoblock - 0.076% - 62 - 1115W
PS Audio Sprout - 0.077% - 62 - 57W
Gryphon Diablo 120 - 0.1% - 60 - 240W
Gryphon Diablo 300 - 0.1% - 60 - 473W
darTZeel NHB-468 - 0.11% - 59 - 205W
Devialet Expert 140 Pro - 0.11% - 59 - 205W
Electrocompaniet Nemo - 0.17% - 55 - 1145W
First Watt J2 - 0.26% - 52 - 13W
Dan D'Agostino Progression Mono - 0.27% - 51 - 934W
First Watt SIT-3 - 0.4% - 48 - 17W
Let me know if you find any mistake.