Ashdown CTM-100 Bass Amplifier Head The CTM 100 pairs the CTM 300 preamp with an all-tube, 100-watt power section 100W RMS Power Output Tube-driven DI out 2 x Ecc83/12ax7 2 x Ecc82/12au7 1 x Ecc99 2 x 6550 (100W)