Adjusting the levels on a dub sound system involves keeping each link loud enough to sound clean, without causing the next one to distort. This setting determines the weight of your bass, the clarity of the skank, and the prominence of your delay or siren. A powerful system that’s poorly set up sounds small. Even a modest system, if properly balanced, can sound just right.
It’s easy to fall into a trap: you turn up one knob because the level seems low, then another to compensate. In the end, the master level is low, one channel is overdriven and the delay is receiving a signal that’s too strong. To avoid this, think of your sound system as a chain. Each piece of kit receives a signal, processes it, then passes it on.
The signal chain of a dub sound system
Before adjusting any settings, work out the actual path the sound takes. This path may be short with an all-in-one unit, or longer if you’re using several separate units. The principle remains the same.
Table: Signal chain and the role of levels
| Component | What you adjust | What you hear | Risk if the level is too high |
|---|---|---|---|
| Audio source | Output volume | A stable, present signal | Mixer input already overloaded |
| Mixer channel | Gain or trim | Full-bodied sound without a steady clip indicator | Harsh sound, crushed transients |
| Effects | Send and return levels | Clear delay, well-balanced reverb | Aggressive or muddled repeats |
| Master | Overall level | Overall balance of the track | Overdriven output, overloaded amp |
| Amp and speakers | Sensitivity and volume | Sustained bass, intelligible vocals | Protection, distortion, speaker fatigue |
This approach is known as gain staging. The name sounds technical, but the idea is simple: you build up the level cleanly, step by step. You’re not trying to have all the knobs turned right up. You’re aiming for sufficient level at each stage, with a margin to allow for peaks.
Adjusting the levels on a dub sound system, from the track to the master
Start with a track you know by heart. Choose a production with a clear bassline, a crisp snare and vocals. A heavily compressed dubplate can mask any flaws in the mix. A more open-sounding track will give you a better idea of what’s going on.
Start with a stable source
Set your source volume to around three-quarters, then leave it there. A mobile phone, player or controller turned right up can send a signal that’s already distorted. Conversely, a source that’s too quiet forces you to overcompensate on the channel’s gain.
The correct setting depends on the device. Some players output very loud levels, whilst others are more restrained. What matters is consistency: keep the volume at the same level from one track to the next when the files have comparable levels. You’ll then know that any variations come from the mix, not your system.
Calibrate the gain for each channel
Set the channel fader to its usual playback position. Often, this is close to its maximum useful level, but it depends on your mixing desk. Play the track, then raise the gain until you achieve a solid level without constant clipping.
A meter that rarely lights up on a kick drum isn’t as serious a concern as a red meter that stays on throughout the track. If clipping persists, lower the gain. This isn’t about losing volume; it’s about preserving the headroom that the bass and kick drums need.
Make this adjustment on each source. Two tracks may sound equally loud to the ear, but require different gain settings. An old roots production with little bass doesn’t need the same settings as a dense modern steppa track. Don’t aim for identical positions on all the knobs. Aim for a consistent output level.
Leave some headroom for the loud passages
In dub, you take away and you add back. A bass kill, a filter opening up, a siren on a drop or a delay return can quickly change the perceived energy. If your system is already on the verge of saturation on the bare riddim, you’ve got no headroom left to play with.
So leave some headroom on the master. It’ll come in handy when you switch to a louder track, when you bring the bass back in after a filtered section, or when the crowd asks for a bit more volume. This headroom also protects your judgement: a sound that’s too loud often sounds better for thirty seconds, then becomes muddled.
Treat effects like any other track
Delay isn’t just about its time or feedback. Its input level matters just as much. If you send a signal that’s too hot into the effect, the repeats will become muddy, harsh or overdriven before you’ve even turned up the return.
Start with a low send level. Then turn up the return until you can clearly hear the first repeat, without drowning out the vocals or the skank. Then work on the feedback. High feedback can sound magnificent on a short phrase, but it quickly takes over on a sustained bass line.
With a spring reverb or an external tape echo, apply the same rule. An effect should add intent, not hide a level problem. If your delay is constantly muddy, turn down its return and input levels first before touching the EQ.
The role of isolator filters in your mix
Isolator filters aren’t just volume controls. They alter the spectral balance, and therefore the perceived power. When you cut the mids and highs, the bass may seem less powerful because your ear loses its reference points. Many people then compensate by turning up the master, only to suddenly turn it all back down and overload the signal chain.
Take the time to listen to what each band does. A rich bass line doesn’t always need more bass. It often requires cutting a little from the lower midrange, where the kick drum, bass line and certain vocals can get in each other’s way. On a small home speaker, boosting the bass doesn’t create a big bass sound: it can simply cause the speaker to work too hard.
On a KLEMENTZ Dub Mixer, the isolator filters, preamp, siren and delay all share the same control interface. It’s handy, but it requires the same discipline: maintain your reference level before applying any processing. You’ll hear each adjustment more clearly and find your balance more quickly.
Adjusting the amp without confusing power with saturation
The master control on your mixer doesn’t replace the amp’s sensitivity setting. Ideally, you’ll set the amp once so that your usual master setting delivers the desired level in the room. After that, you’ll control the session from the mixer.
If the amp has clip or protection indicators, keep an eye on them. An occasional clip on an attack should catch your attention. Repeated clipping indicates that you’re pushing the amp too hard or that the upstream signal is poorly adjusted. Turning down the master is the first thing to do, but also check the channel gain and the bass boost added by the isolator.
At home, the room plays a big part. A corner can boost certain bass notes and make you think the whole system is overloading. Move the speakers slightly, away from the corners if possible, then listen again at the same volume. Sometimes, the right setting isn’t found on a knob.
Mistakes that cause sound loss
The first mistake is to set each stage too loud and then turn down the master. You end up with a reasonable overall level, but the upstream circuits have already been overloaded with signal. Start by cleaning up the channels, then turn up the master only if the output remains clean.
The second mistake is judging the level based on a single track. Play at least three tracks: an old-school roots track, a dub track heavy on effects, and a production with a modern bassline. If you have to adjust the master every time you switch tracks, your sources may be poorly balanced or your tracks may have very different levels.
The third mistake is to adjust the levels at the lowest volume. At low levels, the bass sounds muted and the treble dominates. You risk overloading the bass to compensate. Make your adjustments at a realistic volume, but not so high as to strain your ears or disturb the neighbours.
FAQ on levels in a dub sound system
Should I turn all the faders right up?
No. Set the faders so that their travel allows you to maintain control whilst playing, then adjust the gain on each channel to achieve a clean level. The fader is for mixing. The gain is for adjusting the source.
My delay is overloading, but the track isn’t clipping. Why is that?
The effect’s input may be receiving too much signal via the send, or its return level may be too high. First turn down the send, then adjust the return. Also check for feedback: a build-up of repeats can give the impression of saturation.
Can I turn up the bass to get more power?
Yes, but in moderation. If the speaker starts to hit the floor, if the amp is clipping or if the notes become muddy, you’ve gone too far. Instead, try cutting a little from the low-mid range or lowering the overall level slightly.
How can I tell if it’s the mixer, the amp or the speaker that’s distorting?
Check the indicator lights and listen for when the distortion kicks in. If it occurs when a channel’s clip indicator lights up, turn down that channel’s gain. If it occurs when the amp’s indicator lights up, turn down the master volume. If no indicators light up but the bass becomes muddy, the speaker or the room may be to blame.
Prepare a reference track, set a starting position for your source and make a mental note of your master level. The next time you set up your sound system, you’ll be starting from a reliable baseline and can focus your attention on track selection, faders and mixing.
