Before founding PSL, I spent years as Technical Manager at the William Aston Hall in Wrexham. One night I was looking after sound for Martha Reeves, of Martha Reeves and the Vandellas.
The first time she played, I ran front of house and monitors myself from the one desk. No issues. The second time, the tour needed a separate monitor engineer, so I brought in a friend to cover the stage while I took front of house.
Soundcheck went on, and on. I was happy with the mix going out to the room, but the sound on stage was not right. The band were not comfortable. So I went up, asked the monitor engineer to step aside for a minute, and re-set the EQ across the whole stage rig. The band left the stage relatively happy.
After the show, Martha went to the monitor engineer first. She hugged him and thanked him for his hard work, which was a lovely thing to watch. Then she walked over to me, leant in, and whispered: “But don’t worry, I know that you’re the maestro.” A tap on the arm, and out she went.
Which had me dancing in the street. That is a Martha Reeves song. I am so sorry.
That night is the clearest example I can give of why these two jobs exist. The audience heard a great show. The band were quietly struggling. Same room, same gig, two completely different versions of the sound. That gap is the whole reason FOH and monitor engineering are separate disciplines.
What a front of house engineer actually does
The front of house engineer, or FOH engineer, is in charge of what the audience hears. That is the job in one sentence.
It goes deeper than pushing faders, though. A good FOH engineer is making decisions long before the show, like which microphone brands to use, where to place them on a drum kit, which polar patterns to choose, and how those mics capture the sound of the room itself. All of it feeds the one thing the audience experiences.
You are usually mixing with the artist’s management standing right next to you at the desk, which keeps you honest. You will never please everyone. Everyone in the room has a slightly different idea of what good sound is. So you mix for the majority and you make the show feel right.
The important thing to understand is that the artists on stage cannot hear your front of house mix. That can actually be a weight off their minds. What is going out to the crowd is your responsibility, not theirs. You are sending one main output to the audience, split left and right with subwoofers, and your whole focus is on making that single output as good as it can be.
What a monitor engineer actually does
The monitor engineer has a completely different job, and a very different stress profile.
Every musician on stage needs to hear themselves and each other, either through floor wedge speakers or through in-ear monitors. The monitor engineer builds a separate, dedicated mix for each one of them. Everyone on that stage is hearing something different, and all of it is being managed at once.
Here is what that means in practice. The bass player might want kick drum and snare clearly so they can lock in with the rhythm, plenty of their own bass so they can hear what they are playing, and probably less guitar and vocals. The singer might want their own vocal very prominent so they can pitch, a bit of the keyboard melody, and most other things turned down.
So the monitor engineer is not really mixing musically, the way a front of house engineer is. They are mixing to the personal preference of every individual on stage. On a bigger production that can be four mixes, or twelve, or twenty four, all running at the same time. Holding all of that together, live, at pace, with no chance to redo it, is the skill.
That is why the audience can be hearing a polished show while the band are having a hard night. If the monitors are off, the performers are fighting to hear themselves, and the front of house sound has nothing to do with it.
Why this matters when you book a live sound company
If you are a promoter, a band manager, or a venue booking a crew, the FOH versus monitor question is worth understanding before the day.
For a smaller show, one engineer running both from a single desk is completely normal and often the right call. It is how I ran Martha Reeves the first time, and how plenty of good gigs are run. The question is when your production has outgrown that.
The trigger is usually the number of individual mixes the stage needs. A solo act or a small band with simple monitoring is one thing. A larger act where six or eight people each need their own carefully balanced mix, especially with in-ear monitors, is another. At that point a dedicated monitor engineer stops being a luxury and becomes the thing that makes the show work.
A live event production company that knows what it is doing will tell you honestly which one your show needs, rather than selling you crew you do not require or sending one pair of hands to a job that needs two. If you want a fuller list of what to check before you book, we have written a guide on what to look for in a live sound company.
Frequently asked questions
What is the difference between FOH and monitor engineering?
The front of house engineer mixes what the audience hears. The monitor engineer mixes what the performers hear on stage, giving each musician their own individual mix through wedges or in-ear monitors. The audience never hears the monitor mix, but the band cannot perform well without it.
Does a small gig need both a FOH and a monitor engineer?
Not always. For a smaller show, one engineer can run both front of house and monitors from the same desk. As the production grows and more performers need their own individual mixes, a dedicated monitor engineer becomes worth it.
What does a monitor engineer actually do?
They build a separate mix for every person on stage, based on what each one needs to hear. A singer might want their own vocal loud, a bass player might want kick and snare to lock in with. Managing all of those mixes at once, live, is the job.
Why does the band sound fine to the audience but struggle on stage?
Because the audience hears the FOH mix and the band hears the monitor mix. If the monitors are not right, the performers can be struggling to hear themselves while the front of house sound is perfectly good. The two are completely separate.
Planning a live show in North Wales?
We provide live event production across North Wales, Chester, and the wider UK, for bands, choirs, promoters, and venues of every size. Whether your show needs one engineer or a full crew with separate front of house and monitor positions, we will tell you straight.
Get in touch and we will talk it through.
Darren Hughes is Director of Pivotal Sound & Lighting, a live event production and AV installation company based in Llay, Wrexham, North Wales. Before founding PSL he was Technical Manager at the William Aston Hall in Wrexham, where he delivered live sound for a long list of touring music and comedy acts. PSL works with artists and choirs across the UK and beyond.