Model No. MBL100055: Standard Series Standard 121 HR 500 W bass amplifier head
Class D power amp delivering 500 W RMS @ 4 Ω and 350 W RMS @ 8 Ω
Active 3-band EQ (Low, Mid, High) with sweepable parametric mid for precise tone control
Dedicated Drive circuit for added grit and harmonic richness
Balanced XLR DI output with ground-lift and pre/post-EQ switching for direct feed
Stereo effects loop with level control for seamless pedal or rack integration
Aux input and headphone output for silent practice and backing-track playback
Controls include Gain, Master, Drive, EQ knobs, FX Mix, Mute and Standby
Rugged all-metal chassis with integrated carry handle and protective rubber corners
Ultra-lightweight (~1.4 kg) and compact footprint for easy transport and stage use