Drummers and bassists who switch to IEMs usually say the same thing: “I can hear my kick fine, but it doesn’t feel like anything.” Cranking the kick channel up in the IEM mix doesn’t fix that — the missing sensation is tactile, not audible. A tactile transducer puts the low end back in their body without putting it in their ears.

Why low end disappears in sealed IEMs

Sound from a stage wedge hits you in three ways:

Ear-level audible — the eardrum hears the kick, snare, bass.
Bone conduction — low frequencies travel through your skull and chest.
Body sensation — sub-bass below 60 Hz actually moves your clothes and pressure-loads your chest.

Sealed IEMs deliver the first one cleanly and accurately, but they kill the other two. Even a perfectly-mixed kick drum in the ear lacks the “in the chest” feeling that tells a drummer they hit the kick hard enough.

The natural impulse is to crank the kick channel until the IEM volume itself produces the sensation. Wrong answer — that path ends in hearing damage. The right answer is to give the player a tactile signal at body level.

Shaker types — what each one does

Throne shaker

A small transducer (3–6 inch, 50–100W) bolted to the bottom of the drum throne. The seat itself vibrates with the kick. Compact, portable, easy to integrate.

Common pick: ButtKicker Mini Concert, Aura Bass Shaker AST-2B-4.

Platform / riser shaker

Larger transducer (10–12 inch, 200–400W) bolted underneath a drum riser or a small platform the player stands on. The whole platform vibrates. Bigger sensation, more rumble. Hard to transport.

Common pick: ButtKicker LFE, Crowson Tactile Motion actuator.

Bassist platform shaker

Same idea as a drummer’s riser shaker but on a small 12×12-inch platform the bass player stands on. Many touring bass players prefer this over carrying a bass amp — they get the chest-thump from the shaker plus the IEM mix, and the amp can stay home.

Signal flow

The shaker is just a speaker that lives at low frequencies. Treat it like one:

Dedicated aux send from the console — NOT the same bus as the IEM mix. The drummer can have ”more kick in chest” without dragging the entire IEM mix louder.
Routed through a small power amp — 50W for a throne shaker, 200–400W for a platform. Match the amp to the shaker’s rated impedance and power.
High-pass + low-pass on the send: HPF at 25 Hz (the shaker can’t reproduce below that anyway, and the amp will work less hard), LPF at 100 Hz (everything above 100 Hz wastes the shaker and starts to feel buzzy).

What to send to the shaker

Kick drum — primary content. Send the kick channel post-EQ so any HPF on the channel is honored.
Bass guitar — for the bass-player platform, and useful for drummers in some genres.
Floor toms — optional, only if the drummer wants extra rumble on tom hits.

Sensible starting settings

Aux send level: start at -10 dB and let the drummer dial up from there.
Power amp gain: roughly half. Don’t run the amp wide open — the shaker can mechanically overheat.
HPF on the aux: 25 Hz, 12 dB/oct.
LPF on the aux: 100 Hz, 24 dB/oct.
Compressor on the aux: ratio 4:1, threshold around -18 dBFS. Keeps a loud kick hit from shaking the player out of their seat.

Common installation mistakes

Mass-loading the riser. A platform shaker on a riser made of two 4×8 ply sheets vibrates beautifully. Stack a drum kit and three monitors on top and the riser is too heavy to move — the shaker is working against the riser’s own weight. Test with gear in place, not empty.
Coupling to the stage. If the riser touches the stage directly, the shaker’s energy telegraphs through the venue floor and the front row hears “thud.” Use isolation pads (closed-cell foam, gel pucks, Auralex SubDude HD-style platforms) between the riser and the stage.
Runaway sub-bass. No LPF on the aux → the shaker tries to reproduce 200 Hz vocal energy → unpleasant buzz. Always LPF the send.
Letting the shaker make audible sound. A well-tuned shaker is felt, not heard. If the audience can hear it, it’s leaking too much into the stage and the kick mic will pick it up. Lower the level and/or improve isolation.

When tactile fails and ambient sub is the better answer

Tactile is for the player only. If everyone on stage wants to feel low-end (in a worship band, for example), you can run a stage subwoofer at low volume pointed at the band. Same kick channel feeding it, same EQ rules.

Tradeoff: the audience near the stage will hear the sub leak, which somewhat defeats the “quiet stage volume” win of IEMs. Most teams pick one or the other depending on priorities.

Tactile Transducers for Drummers and Bassists Using IEMs