I heard different types of connections with a sound engineer:
A) Only with T + A M10 monos
B) Only with T + A PA 3000 HV
C) With T + A PA 3000 HV as preamplifier and T + A M10 monos
Scenario A) was clearly superior to B) and C). More deep bass, more speed and beautiful timbres. Perhaps some Technical Specifications are an explanation for this:
T + A M10
Nominal power 8 ohms: 1000 W.
Damping factor 4 ohms:> 115
Slew rate: 65 V / Js
PWR supply reservoir capacity: 180,000 μF
T + A PA 3000 HV
Nominal power 4 ohms: 500 W.
Damping factor 4 ohms:> 100
Slew rate: 60 V / μS
PWR supply reservoir capacity: 120,000 μF
The M10 monos are better in all respects.