ATOHM EURUS SWB-X Active Subwoofer DIY Kit LD230CRA04 Amplification Module S250 (Unit)

ATOHM EURUS SWB-X Active Subwoofer DIY Kit LD230CRA04 Amplification Module S250 (Unit)
The optional Eurus SWB-X active bass channel is an alternative to the Eurus SW-X model. Like the latter, it is designed in every respect to "extend" the Eurus 1.0 bookshelf loudspeakers.

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Atohm Kit Eurus SWB-X

Active Subwoofer DIY Kit LD230CRA04 Amplification Module S250 (Unit)

Atohm Kit Eurus SWB-X Kit DIY Subwoofer Actif LD230CRA04 Module d'Amplification S250 (Unité)

The optional Eurus SWB-X active bass channel is an alternative to the Eurus SW-X model. Like the latter, it is designed in every respect to "extend" the Eurus 1.0 bookshelf loudspeakers. With its small volume and perfect integration into the initial structure of which it becomes the pedestal, the bass-reflex load carries an S250 amplifier module coupled to an LD230CRA04. Equipped with the latest refinements, this unit pushes the limits of what can be expected from a loudspeaker of this diameter. Its specific alloy cone offers perfect rigidity in a wide bandwidth and under the strongest constraints. Peripheral suspension and spider, the result of extensive studies and simulations, provide a very wide range of linear excursion as well as perfect dynamic stability. Its impressive 156mm motor (FWI Technology: Force Without Inductance) gives an uncommon sensitivity level (90dB/2.83V/1m) for a "sub" application. The associated electronics propel this superb unit up to +/-20mm of excursion. The unique performance of the loudspeaker, the optimized bass-reflex load and the unconditional control of the applied signal (Class D power stage / X-Guard technology) allow to restitute the extreme bass (32Hz @ -3dB) with strength (11dB SPL RMS @ 1M / channel) and velocity. Thanks to its exceptional capabilities and active processing, the Eurus SWB-X connects in perfect symbiosis with the Eurus 1.0 to form a high level system.

Atohm Kit Eurus SWB-X Kit DIY Subwoofer Actif LD230CRA04 Module d'Amplification S250 (Unité)

Components supplied

This model is sold as a kit, to be assembled by yourself. The supplied components are as follows:

  • 1x S250 Module (X30 setting)
  • 1x LD230CRA04 Speaker driver
  • 8x Aluminium spacers
  • 1x Aluminium logo
  • 18x Screws M4x25mm zinc-plated black
  • 6x Claw insert M4
  • 10x Wood screws 4x20mm
  • 4x Screws M6x70mm
  • 8x Washers M6
  • 8x Claw insert M6
  • 4x Screws M6x100mm
  • 1x Decoupling foam  (to be cut into 4 pieces of 105x105mm)

Eurus 1.0 bookshelf speakers are sold separately.

The GR230-C loudspeaker grille is sold separately.

The cabinetwork and the damping material (recycled cotton felt and dacron) are not supplied. Plans are available in the "Download" tab on this page.

Technical characteristics

Specifications
Product typeActive Subwoofer DIY kit for Eurus 1.0
Speaker DriverLD230CRA04
Amplification moduleAtohm S250 (XG30 setting)
Bass-Reflex27.2L
Frequency response32Hz - 150Hz (-3dB)
Bass-Reflex tuning frequency35Hz (with floor vent radiation)
Max SPL level111dB RMS
38-100Hz @ 1M (half-space) THD < 3.5%
Speaker driver sensitivity level90dB/2.83V/1M
Effective power220W
Peak power260W / U-Guard (Soft Clipping)
Active excursion controlX-Guard technology (+/- 20mm max.)
Low level input2x RCA
High level input2x Bananas 4mm / direct clamping
Cut-off frequencyAdjustable from 38Hz to 150Hz
Filtering slopeAdjustable 12dB-24dB-LFE
Phase control0-180°
General
Consumption320W Max
Power supply115 / 230V
Dimensions (HxLxP)820 x 265 x 315mm (stand included)
 
Data sheet
InputSpeaker terminals
InputRCA
Speaker TypeSubwoofer
Loudspeaker diameter (cm)230
Efficiency / Sensitivity (dB)90
Xmax (mm)20
Accepts Banana PlugsYes
ClassClass D / T
Lowest frequency32
Highest frequency150
amplifier chipAtohm S250
Power (max)220W
 
Delivery
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ATOHM EURUS SWB-X Active Subwoofer DIY Kit LD230CRA04 Amplification Module S250 (Unit)
The optional Eurus SWB-X active bass channel is an alternative to the Eurus SW-X model. Like the latter, it is designed in every respect to...

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