- May 26, 2021
- Athens, Greece
Not neccesarily.If you ever want a subwoofer and use the LFE channel you kinda need one.
There are 2-ch amps with pre-out and/or subwoofer out.
Also, you can connect an active subwoofer just with speaker wire to the speaker terminals of your amp, in parallel with the speakers. The subwoofer presents a high impedance load to the stereo amplifier and takes very little current, so it may be connected in parallel with the main speakers with no adverse effects.