First the quality of manufacture and date. Cel parat indestructible. The two satellites of 50W each mtalliques boxes are teams of two brackets that can rotate 360 and tilt 90 forward. They are positioned with necklaces Intgr fixations on the two front vertical bars of the rack. The Woofer 100W (2x 250mm) is really tough. It is covered with a carpet with a espce intgre grip screws securely on all four wheels. Convenient for 'travel and also saw the weight 30KG!. I switch on my right under the rack.
CONTRL: gnral Volume, Woofer Volume, High, Volume Mix
Connectors: Main Input (L / MONO, R) Mix Input (L / MONO, R), Line Output (L, R)
I used these speakers first on a Roland TD-6 and currently on a Roland TD-12. The sound is excellent. It would tend to saturate but you really put the focus back and ears. IDAL is for DMOS example of the methods of music (the satellites turn facing the audience) or training as a small return. Playing with headphones is good but also j'apprcie the direct sound. And it's really the foot. One more thing these speakers may well be trs utiliss also with an acoustic setting trpieds on satellites or on the rack to play on albums or to connect a box rhythms, SPD-S etc ...
For the price FRS 1'600 1'066 Euros approximately. Like all Roland products is a bit lev.
Exprience with this choice I do it again.