NANO BLANK Panel 4HP Modular System

Eurorack Blank Panel 4HP — Clean Up Empty Slots in Your Modular Rack

The NANO Modules BLANK Panel 4HP is a passive Eurorack blind panel built to close the gaps that appear in any growing modular system. Every time a module is removed, swapped or simply not yet purchased, an empty 4HP slot exposes the rack's internal power distribution board to dust, stray patch cables and accidental contact. This panel covers that opening with a solid black faceplate that matches the Eurorack 3U row height, restoring a continuous, professional look across the entire case.

Beyond filling holes, the panel acts as a low-profile shield over the bus board and ribbon cables underneath. It also serves as a layout tool: placing one or more blanks between functional modules creates breathing room, makes knob clusters easier to read on a dim stage, and lets players group related modules (oscillators, filters, utilities) into clearly separated zones. The aesthetic is drawn from Lissajous curves and oscilloscope imagery, giving the front face a subtle technical character rather than a flat, anonymous look.

What Sets the NANO Blank Panel Apart

Most generic blanks are plain rectangles with no design intent. The NANO Modules 4HP Blank Panel carries a Lissajous-curve and oscilloscope-inspired graphic on its face, so the panel reads as a deliberate part of the system rather than a placeholder. It is also sold in a matched family of widths — 2HP, 4HP, 6HP, 8HP, 12HP, 16HP and 20HP — so builders can mix sizes to fill irregular gaps left by removing or rearranging modules of different widths.

Format and Physical Dimensions

The 4HP designation follows the standard Eurorack horizontal-pitch measurement, where one HP equals 5.08 mm of panel width. Choosing the correct HP value is essential because the panel must align with the threaded mounting strips on the rack rails; a mis-sized blank will leave a visible gap or fail to seat flush against neighbouring modules.

• Module Width: 4HP (20.32 mm) — covers a single standard Eurorack slot
• Module Height: 3U (128.50 mm panel height) — matches full-size Eurorack rows
• Panel Colour: Black — coordinates with the majority of dark-finished modules

Compatibility and Mounting

As a passive mechanical accessory, the panel requires no power connection, no signal cables and no firmware. It ships with two M3 knurled screws — the same thread used by every other Eurorack module — so installation is a matter of seating the blank against the rail and hand-tightening the screws. This makes it equally useful in a permanent studio case, a portable skiff or a performance rack that is reconfigured between sets.

• Format: Eurorack blind panel — passive, no power or signal I/O
• Compatible With: Eurorack modular synthesizer systems — any 3U row with standard rails
• Mounting: 2 × M3 knurled screws included — hand-tightened, no tools required

Use Cases and Ideal Owners

The NANO Modules BLANK Panel 4HP is the right choice for modular synthesizer builders who need to close unused 4HP slots in a 3U Eurorack rack while keeping the internal power distribution board protected. It suits players who frequently swap modules during patch development, performers who want clean visual separation between oscillator banks, filter chains and utility sections on stage, and studio owners who simply prefer a finished, gap-free front panel. Anyone running a partially populated case will find immediate value in a small stack of these blanks.

About NANO Modules

NANO Modules is a Eurorack manufacturer based in Spain, producing a focused catalogue of utility, mixing and multi-FX modules alongside practical accessories such as blank panels and bus boards. The brand's design language draws on oscilloscope and waveform aesthetics, which carries through to its blank-panel family and gives even a passive accessory a distinctive visual identity within a rack.