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DE Plan 400 inside

For Invisible Integration into Furniture and Wall Panels


Key Features
  • Very linear ferequency range

  • Small mounting dimensions: 420 × 300 mm

  • 180° dispersion

  • 240 watts power capacity, 8 ohms

  • 2 × 6“ woofers + 1” high frequency driver

  • Invisible flat transducer

  • For integration into furniture and wall panels

Fields of Application
  • Exhibitions, trade fairs
  • Gastronomy, hotels
  • Home audio
  • Museums
  • Surround systems
  • Sales rooms

The DE Plan 400 inside® is a special version of DE Plan 400 designed to be invisibly installed in furniture and wall panels. The speaker is glued onto the backside of furniture or panels made of wood, MDF or similar materials and directly excites through these surfaces. To do this, the recessed mounting area is milled into the rear surface to a wall thickness of 3 mm. The surface is activated without an intermediate membrane, which makes DE Plan 400 inside extremely efficient and gives it an extensive, linear frequency range.

de:shape: the membrane of the DE Plan 400 inside has an optimized contour with a calculated distribution of distance between the edge and the high frequency driver (patent pending). This results in unprecedented audio performance and extremely accurate sound reproduction.

The elaborately tuned crossover ensures a warm, transparent acoustic pattern. The DE Plan 400 inside offers high-quality music and precise speech reproduction and is hence equally suited for home audio as well as media rooms and gastronomy. A wide dispersion angle of 180° means that sound is distributed evenly throughout the room with just a few speakers.

The reproduction characteristics depend very much on the material in which the speakers are installed and the acoustics of each room. As a result, our system controllers or DSP power amplifiers should always be used to achieve the best sound pattern.

Technical Data

2-way flat transducer


2 × 6” woofers + 1” high frequency drivers

Frequency range
46 Hz – 20 kHz (mounted on a MDF panel with 3 mm thickness in)
8 Ohm
Power capacity
120 watts RMS, 240 watts program

82 dB (1 W@ 1 m), depending on the mounting materials

Maximum SPL

104 dB @ 1 m

Dispersion angle (H × V)

420 × 300 × 72 mm

Installation depth
72 mm
Recess size
424 × 304 mm, remaining wall thickness in front of the speaker: 3 mm
3.9 kg
Screw-type terminals, pluggable
5 years

DE Plan 400 inside

Order No.: 0412-0001

Complete with 2C adhesive


EG Plan 400

Order No.: 2302-0001

Back box

Dim. 500 × 480 × 120 mm