Basso 840

The Indiana Line Basso 840 model is a modern active subwoofer. The integrated class AB amplifier with a maximum power of 125 W drives a 275 mm woofer. The frequency response of this subwoofer is between 24 and 180 Hz. The efficient bass reflex cabinet and the functionality of the subwoofer are also noteworthy. The amplifier module is equipped with a cut-off and gain frequency control as well as a phase switch, which allows you to adjust the signal processing parameters to the user’s needs. This active subwoofer is perfect for both stereo and home theater systems.


SRP per item

Indiana Line Basso 840

The Indiana Line brand was founded in 1977 in Turin. Currently, it is one of the most important Italian brands offering loudspeakers and installation speakers. The brand stands out from the competition of the rational use of components and an optimized production process. The goals of Indiana Line designers and engineers have resulted in the appearance on the market of models that achieve sonic qualities that go far beyond the parameters that can be achieved in a similar price range.

Basso series and unique acoustic possibilities

Basso models are active subwoofers with amazing acoustic capabilities. They have been designed to complete the low-frequency range processed by loudspeakers in stereo and home theater systems. The amplifiers built into the Basso subwoofers are equipped with a complete control section, which allows them to perfectly match other components of the audio system and the acoustics of the listening room.

Efficient bass reflex cabinet

This active subwoofer will work not only among home theater fans, but also music lovers. It uses two bass reflex ports located on the rear of the cabinet, minimizing the audibility of unwanted turbulence. The very low tuning frequency prevents excessive excursion of the 275 mm woofer. To deepen the bass, it has been placed underneath (produces sound towards the floor).

Functional control section

The class AB amplifier module used in the construction of this subwoofer is equipped with crossover frequency and gain controls as well as a phase switch, which allows for adjusting the processing parameters to the user’s needs. The Basso 840 is finished with matte black vinyl. The subtle and timeless design of this model’s cabinet makes it easily fit into any interior design.

The most important features of the Basso 840 model:

  • 275 mm woofer
  • Bass reflex cabinet with two ports at the back
  • Class AB amplifier
  • Finish: black matte vinyl
  • Frequency response: 30 to 180 Hz
  • Crossover frequency: from 40 to 180 Hz
  • Supply voltage: 220 – 240 V
  • Nominal / maximum power: 75 W / 125 W
  • Maximum power consumption: 125 W
  • Standby power consumption: less than 0,5 W
  • Dimensions (H x W x D): 385 x 300 x 320 mm
  • Weight: 10,2 kg

Technical data

Speaker alignment / type


Box aligment / port placement

2 x bass-reflex / back

Driver diameter

275 mm

Frequency response

30 – 180 Hz


40 – 180 Hz

Amplifier type

class AB

Nominal / maximum power

75 / 125 W

Maximum power consumption

125 W

Standby power consumption

< 0,5 A

Fuse rating

1 A

Line inputs

L / R / LFE

Hi-level input

yes (L / R)

Power supply voltage

220 – 240 V AC

Dimensions (H x W x D)

385 x 300 x 320 mm




10,2 kg

100% polyester damping

All Indiana Line cabinets are filled with polyester – a synthetic non-woven fabric of high purity, known for its excellent damping of the internal resonances of the speaker cabinets. What's more, polyester is also extremely resistant to stretching, drying and moisture.

100% polyester damping

MDF housing with transverse reinforcements

Indiana Line loudspeakers cabinets are made of MDF panels. They are made using the latest production techniques, which ensures high precision of workmanship, great repeatability and excellent performance parameters for many years. MDF is a moisture-resistant material, it is massive and it suppresses all resonances very well. To completely remove unwanted vibrations, we used transverse reinforcements of the cabinet. They take the form of horizontal rings that are located at key points along the entire height of the loudspeaker cabinet.

MDF housing with transverse reinforcements


A radial damping chamber that prevents harmful reflections under the tweeter dome while allowing it to achieve a low resonance frequency. The small, but at the same time strong, neodymium magnet of the tweeter is surrounded by a space in which – due to its shape – standing waves cannot be generated, which is the case with classic radial chambers located in the axis of the dome.


Indiana Line Basso 840 - product card_EN


Indiana Line Basso 840 – owner's manual


Indiana Line Catalogue EN


Pricelist 2023


Test Nota 240 X - Basso 840 - AudioReview - IT