GL 3300 is a versatile mixing console. 28 balanced inputs on XLR mic Gain + wideband phase inverter. 4-band EQ with 2 semi-parametric bands (with On / Off) + 100 Hz low-cut filter. 4 groups (balanced XLR output with insert) with reinjection to generals. + 4 subgroups. 4 stereo input channels: Balanced inputs on XLR microphone (48V) line insertion and Jack.