I use the Multicom as a dynamics processor in a live 2-piece band. The four channels allow me two vocals and two guitars to be connected to the Multicom via the inserts on the mixer.

Once I became used to the layout of the controls, it was fairly easy to alter the settings during the gig to improve the overall sound (at the expense, of course, of omitting some guitar playing!). I should note, however, that some of the buttons are not labelled with which switch position does which function - that has to be memorized!

The soft-knee compression characteristic is useful in reducing the noticeability of the compression kicking in, and allows a higher ratio to be employed. In the live situation, I would tend to use quite a bit of compression, perhaps more than a recording engineer might use. I keep the thresholds fairly low on the vocals a use about 4:1 or even 5:1 ratios. This means that practically all vocals are within the compression 'zone', except for the quietest of sounds, which are removed with the gate/expander. Thus softly sung lines don't drop under the mix, and loud parts don't drown everything else out. Note that quietly sung lines are still perceived as being quiet due to the timbre of the softer voice, and loud parts still are perceived as loud. The listener notices changes in voice expression more than actual volume changes. The end result is that everything stays in its place in the mix, without dropping under or booming over the mix, and everything can be heard at once.

I couldn't really comment on how the Multicom compares to other dynamics processors as its the first I've used. But it certainly is good value for money, as four channels are offered each with a gate/expander, compressor, and limiter. It certainly improves the live sound, and the whole sound feels more balanced and controlled. It also helpfully reduces the effects of the singer moving about in front of the mike, as is common in live gigs. The gate/expander is a really useful function too, and I have noticed it can help reduce feedback.

So if you play in a live band and want to help smooth out and balance your sound, go ahead and get one, they're fairly cheap. But you do need to do a bit of homework to figure out how to properly set the various controls for the sound you want - it's not that obvious.