A tilt EQ is a single tone knob that tips your bass's frequency balance like a seesaw. Turn it one way and the sound gets brighter and more articulate; turn it the other way and it gets warmer and rounder. Instead of juggling separate bass, mid and treble knobs, you make one move and hear the whole tone shift. The McGrath Tilt EQ is our own version, an onboard active preamp and buffer voiced specifically for bass, and it comes standard on every active McGrath build.
How a tilt EQ works
Picture a seesaw balanced in the middle of the frequency range. A traditional tilt control lifts one end while lowering the other, so adding treble also trims some bass, and adding bass trims some treble. That keeps the overall level steady and makes the change feel natural rather than like a boost that pushes everything louder.
The idea comes from studio gear. Our circuit traces back to a suggestion from Keith Duffy, bassist for The Corrs, who wanted the tone-shaping of the 1980s DOD FX10 Bi-FET Preamp built straight into a bass control cavity. That pedal was a studio secret weapon on a lot of 1990s pop records.
What makes the McGrath Tilt EQ different
Generic tilt EQs can thin out your low end when you brighten the tone. That is a problem on bass, where the fundamental is the whole point. We voiced ours differently:
- Clockwise (treble tilt): brings out upper-mid articulation, finger attack and slap clarity while keeping the low-end fundamental intact.
- Counterclockwise (bass tilt): thickens the low end with vintage warmth, and turns into a sub-heavy sound when fully open.
- Center detent: a click at 12 o'clock returns you to flat instantly.
Even at center, the Tilt EQ works as a low-impedance active buffer. It protects your highs and your punch against signal loss from long cables and pedalboard runs. It runs on 9V or 18V for extra clean headroom, and an internal trimpot sets overall gain so active and passive modes can sit at matching levels.
Tilt EQ vs a 3-band EQ
A 3-band EQ gives you more surgical control, and some players love that. The trade-off is that it is easy to end up with every knob maxed out, chasing a sound that a single, well-voiced curve would have found faster. Bass Magazine's feature on our Tilt EQ talked about exactly this maxing-out problem.
A tilt EQ suits you if you want to dial a tone quickly on a gig, if you play several styles in one night, or if you find multi-knob preamps more confusing than helpful. If you want precise control over a specific midrange frequency, a 3-band may still be the better fit, and we offer a high-headroom 18V active 3-band EQ as a custom option too.
How it fits into a McGrath control layout
On an active McGrath, the controls stay simple. With one pickup you get master volume, Tilt EQ and master tone. With two pickups, you add a second pickup volume. With three pickups, like our Thunderhorse layout, the McGrath Switch 12-way rotary pickup selector joins the Tilt EQ, master volume and master tone. Pull up the volume knob to bypass the preamp and play passive any time, even with a dead battery.
If you are still deciding between active and passive, our guide to active vs passive bass electronics covers the basics. For the backstory, read our original Tilt EQ announcement and the Bass Magazine article. The Bass Channel also demonstrated it alongside the 12-way switch in their review of our 32" Thunderhorse 5.
Can I put one in my own bass?
Yes. The McGrath Tilt EQ is sold on its own for $120. The compact board drops into tight cavities, including standard P and J routes, without removing wood, and screw terminals make it a solderless install. You will need a stereo (TRS) output jack. A 9V battery is not included.
Common questions
Does a tilt EQ cut my bass when I add treble?
A generic tilt EQ usually does. The McGrath Tilt EQ is voiced so that turning clockwise adds articulation and attack while keeping the low-end fundamental intact.
Do I need a battery?
Yes. The Tilt EQ is active and runs on 9V, or 18V with two 9V batteries in series. Batteries are not included with custom basses or the standalone unit, so have some ready.
What happens if the battery dies mid-gig?
On a McGrath bass, pull up the master volume knob to bypass the preamp and keep playing passive.
Hear it on your own build
Every active bass designed in the McGrath Bass Builder includes the Tilt EQ as standard. Builds are made by Cormac in our two-person San Diego shop, with art finishes hand-painted by Madelyn, and ship in a McGrath x Protec hybrid case. Bass Builder pricing starts at $1,999, a 25% deposit reserves your build, and lead time is currently about 4 months. If you would rather play one now, browse our in-stock instruments, which ship within 2 to 5 business days.
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