Like the VHT RedLine 25B, the VHT RedLine 50B bass amp is brimming with the same pro-quality features: it has active and passive inputs to accommodate any bass, a post-EQ low-noise XLR DI output with level control for recording or connecting to a PA, a pre-EQ tuner jack, an extension speaker jack and a high-quality post-EQ effects loop. The 50B also has Volume, Bass, Mid and Treble controls, and its built-in limiter insures that the sound is always tight and clean.The 50B adds an effects blend control, which is great for blending clean tones with effects; try it with your favorite distortion pedal and hear how blending clean tones with distortion can keep the sound tight and punchy, with the added growl and grind from the distortion pedal.