The Portal is an active signal mixer with two modes of operation: parallel and serial.

• In parallel mode, it features two send/return loops and one main output.
• The main output can combine three independent inputs into one or be used as an active ABY, depending on your needs.
• In serial mode, channels A and B are in series.
• When the A/B switch is off, either channel A or B is bypassed.
• When all three switches are off, there is true bypass.