Elac Varro PS250 Powered Subwoofer (10-inch, 500W)

Elac Varro PS250 Powered Subwoofer (10-inch, 500W)

The ELAC Varro PS250 is the 10-inch model in ELAC’s Varro Premium subwoofer range, a bass-reflex powered subwoofer designed to add controlled low-frequency weight to stereo and home theatre systems. Its headline power figure needs reading correctly: the built-in BASH amplifier is rated at 250 watts RMS with 500 watts peak into 4 ohms, which is how the 500W figure in the product name should be understood. A 10-inch treated paper woofer, a substantial internally braced cabinet and app-based control with automatic room equalisation mark the PS250 out from basic subwoofers that offer only a volume knob and a phase switch. It is intended for listeners who want bass that integrates with the main speakers rather than simply making its presence felt.

Key features

• 10-inch treated paper woofer: A single long-throw driver in a bass-reflex cabinet, sized for meaningful output in small to medium rooms without a large footprint.
• 250W RMS, 500W peak BASH amplification: ELAC’s BASH amplifier topology delivers 250 watts continuous and 500 watts peak power, with standby consumption below 0.5 watts.
• App control with Auto EQ: ELAC Sub Control 3.0, controlled over Bluetooth Low Energy from iOS and Android devices, includes Auto EQ room correction and control of multiple subwoofers.
• Low extension: Frequency response is rated 27Hz to 150Hz anechoic and 24Hz to 150Hz in-room, with a maximum output level of 107 dB at 1 metre anechoic.
• Adjustable low-pass crossover: The crossover can be set between 40Hz and 150Hz, allowing the PS250 to blend with compact bookshelf speakers or larger floorstanding models.
• Line and speaker level inputs: RCA line-level and speaker-level inputs are provided, plus a USB connection used for firmware updates.
• Braced cabinet: A vinyl-wrapped cabinet in black, internally braced to limit resonance, supplied with a grille, power cord and spikes.

Amplification and control

Traditional analogue subwoofer controls are replaced here by digital control through the ELAC Sub Control 3.0 app. That matters in practice because subwoofer adjustment normally means reaching behind a cabinet, changing a dial by guesswork and returning to the listening seat to judge the result. With app control, crossover, level and other settings can be adjusted from the seat itself, and more than one Varro subwoofer can be managed from the same interface. Auto EQ addresses the other persistent subwoofer problem: room interaction. By comparing a near-field measurement with a measurement at the listening position, the system works to reduce the peaks and unevenness the room itself creates, giving the listener more freedom over where the cabinet can realistically be placed.

Bass performance in a system

A 10-inch driver with this power reserve is aimed at extension and control rather than sheer physical scale. The in-room response figure of 24Hz indicates an ability to reproduce the lowest notes and film effects that small speakers roll off well above, while the 107 dB maximum output figure shows there is headroom for dynamic peaks. How that translates in a given room depends heavily on placement, room dimensions and where the listener sits. Corner placement typically reinforces output but can exaggerate unevenness, which is precisely the situation Auto EQ is designed to help manage. Experimenting with position before finalising settings is still worthwhile.

Integration and setup

The PS250 connects to an AV receiver or processor through its RCA line-level input, using the receiver’s own bass management, or to a stereo amplifier through either line-level or speaker-level inputs. Setting the low-pass crossover close to the main speakers’ natural low-frequency limit usually gives the smoothest handover: too high and the subwoofer becomes localisable, too low and a gap opens in the upper bass. Level should be set so that bass lines sound even in pitch rather than simply loud. Because control is handled in the app, the cabinet itself can be placed without worrying about daily access to rear-panel dials.

The Varro PS250 suits a system where the main speakers are good but physically limited in the bass, which describes most bookshelf and many floorstanding designs. Its combination of a 10-inch treated paper driver, 250-watt RMS BASH amplification, app control and Auto EQ room correction makes it a considered, technically complete subwoofer rather than a simple bass box, and its compact 360mm-wide cabinet keeps placement options open in ordinary living spaces.