Hello

Your Artcoustic Diablo Target speakers are passive so you will cetainly need an amplifier if you are planning to use a Meridian MS200.
The MS200 has a variable analogue output so you only require a power amp.

Neil

1) MS200, G65, Revivers, DSP5000.2, DSP5000C.2, DSP3100, D1500, SME10/IV.

2) Mac Mini (Roon), Explorer 2, Sennheiser HD6XX.