From the Loftsmith Workshop

Guitar amp tilt-back stand, sized to your combo amp

Two lipped wedge cradles lift the front of a combo amp so it tilts back toward your ears, sized to amps 150-350 mm deep. You enter your amp's depth, height, weight and an estimated centre of mass. The stand works out the angle at which the amp would tip over backwards and keeps your tilt at least 8° short of it: a 238 x 398 mm amp (Katana-50 MkII size) tips at 30.9°, so the default 20° leaves a 10.9° margin. A 12 mm lip holds the front edge, and printed TPU pads stop the cradles walking. Checked in the Loftsmith engine at every slider end. Prints on its side in PETG with no supports: about 84

6 parts · 81 g · 86 × 40 × 95 mm

by Loftsmith Workshop

Guitar amp tilt-back stand, sized to your combo amp
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No adjustable sizes

Ask for the sizes you want to tweak, e.g. “make the width adjustable”.

Change it in the Studio

Parts

  • cradle ×2 · PETG · On its side (profile face down), printRotate [-90, 0, 0], so the amp's load runs along the layers; no supports

    86 x 94 x 40 mm each at the defaults; about 40 g and 58 min each at 2 walls/15%. PETG is tough if kicked and holds its shape better than PLA near a warm amp. The lifted height and the profile follow the depth and tilt sliders; at a 350 mm depth and 20° the cradle is 110 x 133 mm on the bed.

  • pad ×4 · TPU 95A · Flat, chamfered face down

    16 mm discs, 2.4 mm thick. They press into 1.5 mm pockets under each cradle and stand 1 mm proud. Under 1 g each, about 5 min. Stick-on rubber bumpers 16 mm across can be used instead.

Print settings

Layer height
0.2 mm
Walls
2 walls on the page stats (84 g, about 2 h 20 min for both cradles and pads at 2 walls/15%); 4 walls recommended for a part that holds a load for months
Infill
15% for the stats line; 4 walls/20% gyroid recommended: about 136 g, about 3 h 38 min for the set
Supports
None. The cradles print on their side and the window is a vertical through-hole
Notes
Cradles in PETG, pads in TPU 95A (a separate print). The engine's stress estimate is 0.45 MPa in the seat at the defaults, so the extra walls are for stiffness and creep, not strength.

Hardware

  • 4 × Optional: 16 mm stick-on rubber bumper pads · Use these instead of the printed TPU pads if you have no TPU. Felt can slide on hard floors at steep tilts.
  • Drop of superglue or contact adhesive · Optional, to keep the pads in their pockets when you move the cradles

Assembly

  1. Measure your amp's depth (front panel to back panel at the base), height, width and weight, and set the sliders. If you know the heavy parts sit low or toward the back (transformer, speaker magnet), move the centre-of-mass sliders to match. The stand lowers the tilt on its own if your amp would come
  2. Print two cradles and four TPU pads, then press the pads into the pockets under each cradle (a drop of glue keeps them there).
  3. Tip the amp back onto its back bottom edge, slide a cradle under each side of the front edge (they sit 35 mm in from each side wall), and lower the amp so its front bottom edge drops behind the lips.
  4. To take it off, tip the amp back a few degrees about its back edge (about 4° for a 238 mm deep amp) until the front edge clears the lips, then slide the cradles out.

Good to know

  • The tip angle depends on where your amp's centre of mass really is, which the stand can only estimate from the two sliders (default: middle of the height and depth). A heavy transformer high up or at the back makes it tip sooner, so if in doubt move the sliders toward the worse case.
  • The 8° margin assumes the amp's back bottom edge is on a level, hard floor. Thick carpet, feet or casters under the back edge, or a pedalboard cable pulling on the back all change it.
  • At the steepest settings the pads need friction of up to 0.45 on the floor. Rubber or TPU pads are meant for this; felt pads can slide on wood or tile.
  • Not for amp heads on cabinets, stacked rigs or amps over 25 kg. Very tall, shallow amps may be limited to a small tilt or none, and the tip check fails if fewer than 5° are safe.
  • Checked in the Loftsmith engine (fit, tipping, stress and pad friction at every slider end), not printed or tested on a real amp. Check that the lip clears any front corner protectors or grille trim before you rely on it.
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