RD 280

Indiana Line offers high-quality installation speakers, including ceiling speakers for various types of audio systems. The Indiana Line RD 280, the larger of the two twin concentric Indiana Line models, is a two-way concentric installation speaker, which uses a large 210 mm woofer and a 24 mm dome tweeter. As a passive speaker, the Indiana Line RD 280 requires an amplifier whose recommended power is 20-70W. The loudspeaker can be mounted both in the ceiling and in the wall. This model will work as a part of a public address system, even in the most advanced installations, providing emotional and dynamic sound and complementing the fantastic appearance of this company’s loudspeakers. Indiana Line, as a manufacturer of models for amplifying any size of space using hi-fi stereo systems and more, offers both floor and ceiling speakers, as well as woofers. Thanks to this, it guarantees the highest quality of sound, which is confirmed by the Indiana Line RD 280 model.


SRP per item

sale only in pairs

Indiana Line RD 280

Indiana Line, with traditions dating back to the 1970s, is one of the most important Italian brands in the audio sector. It offers loudspeakers as well as installation speakers. Indiana Line designers and engineers develop models that stand out for high-quality workmanship, and at the same time are characterized by the rational use of elements. The sonic qualities of products with the Indiana Line brand logo go far beyond the parameters achieved by competing models in a similar price range.

Universal and functional designs

Installation speakers available in the Indiana Line offer are the models that have been designed to amplify sound to various rooms – from home living rooms to shops and restaurants. These models are perfect not only for playing sound in stereo systems but also for use in home theater systems – as effect speakers. Depending on their needs, users can choose from a variety of designs – this Indiana Line range includes both ceiling, wall, and wall-mounted loudspeakers. The universal design of the Italian brand installation models makes these speakers easy to match with any interior design.

For home theater and more

The RD 280 concentric 2-way installation speaker is designed for the most demanding audio and video installations. Of considerable size, because the 210 mm woofer, in combination with a 24 mm ring dome tweeter can produce an incredibly emotional sound spectacle. Thanks to the applied solutions, the RD 280 model is perfect for playing music in stereo systems and film sound effects in home theater systems. As in the smaller model RD 260 from this series, the special design of the cabinet allows you to install the loudspeaker on a wall or suspended ceiling without the need to use any additional accessories.

The most important features of the RD 280 model:

  • 2-way acoustical design
  • Crossover frequency: 4 kHz
  • 210 mm mid-woofer
  • 24 mm tweeter
  • Frequency response: 48 Hz to 22 kHz
  • Suggested amplifier power: 20 – 70 W
  • Sensitivity: 93 dB (2,8 V / 1 m)

Technical data

Speaker alignment / type

2-way / ceiling

Box aligment / port placement

sealed / infinite baffle

Driver diameter

midwoofer: 1 x 210 mm, tweeter: 24 mm, ring dome

Frequency response

48 – 22000 Hz

Sensitivity (2,8 V/1 m)

93 dB


4000 Hz

Amplifier loading impedance

4 – 8 ohm

Suggested amplifier power

20 – 70 W

Dimensions (H x W x D)

flange: 271 mm, mounting diameter: 237 mm




1,6 kg

Indiana Line Catalogue EN


Indiana Line RD 280 - product card_EN


Indiana Line RD SQ – owner's manual