Lab Gruppen LUCIA 240/1-70 Compact Mono Amplifier for High-Impedance 70V Installations (1 x 240W) - LUCIA240/1-70

Product Overview

The Lab Gruppen LUCIA 240/1-70 is a mono, 240W constant-voltage installation amplifier designed for 70V and 100V distributed speaker systems in commercial AV applications. It delivers 240W at 70V or 120W at 100V from a compact half-rack enclosure, making it well-suited for distributed audio in large conference rooms, training facilities, houses of worship, and government spaces. The LUCIA 240/1-70 supports decentralized AV architecture, placing amplification near the speaker zone rather than in a centralized equipment room.

Product Description

The LUCIA 240/1-70 is Lab Gruppen's highest-output 70V model in the LUCIA compact installation amplifier series. It operates at 70V (240W) or 100V (120W) constant-voltage, and also supports 16-ohm direct loads, providing flexibility for installers working across mixed speaker system types. The Class-D amplifier topology provides efficient operation, which is important in installations where the amplifier is located in a concealed, thermally constrained space such as behind a display or in ceiling plenum. Onboard DSP includes automatic dynamic loudness contouring and auto load sense, which calibrates the variable power limiter to match the total distributed speaker load — a critical feature for 70V systems where tap wattage may vary across individual speaker locations. Input connectivity includes a balanced Euroblock line input and dual RCA unbalanced inputs. A GPIO output block supports integration with external control systems for muting or triggering. The included wall-mount bracket enables deployment in equipment rooms, above ceilings, or near speaker clusters. Optional rack integration is available via the LUCIA-RACKKIT. The LUCIA 240/1-70 is the right choice when a 70V distributed speaker system needs a compact, locally-placed amplifier with professional DSP rather than a large central rack-mount unit.

Key Features

• 240W at 70V / 120W at 100V — Supports both 70V and 100V constant-voltage distributed speaker systems, plus 16-ohm direct loads, from a single amplifier.
• Class-D Efficiency — Energy-efficient amplifier topology reduces heat output in concealed or thermally limited installation environments.
• Built-in DSP — Onboard signal processing with equalization and auto load sense eliminates the need for external DSP in standard distributed audio deployments.
• Auto Load Sense — Automatically measures total speaker load and sets the variable power limiter to protect the speaker circuit without manual calibration.
• Automatic Dynamic Loudness Contouring — Maintains consistent tonal balance across listening levels in ambient environments.
• GPIO Control Output — 6-pin balanced GPIO block for integration with room control systems, enabling remote muting or zone triggering.
• Balanced and Unbalanced Inputs — Accepts both balanced Euroblock line-level and dual RCA unbalanced inputs for flexible source connectivity.
• Half-Rack Compact Enclosure — Concealed installation behind displays, in ceiling spaces, or in equipment closets; rack-mountable via optional LUCIA-RACKKIT.

Typical Applications

• Conference room
• Training room
• House of worship
• Government space
• Multi-purpose room
• Auditorium
• All-hands room

Technical Specifications

Frequently Asked Questions

Q: What speaker systems is the LUCIA 240/1-70 compatible with?

A: It is designed for 70V and 100V constant-voltage distributed speaker systems, which are standard for commercial AV installations with multiple ceiling or wall speakers. It also supports 16-ohm low-impedance loads directly, offering flexibility when a single zone has a low-impedance speaker cabinet.

Q: How many 70V speakers can this amplifier drive?

A: The total speaker load is limited by the amplifier's 240W output at 70V. The number of speakers depends on the wattage tap selected at each speaker transformer. For example, if each speaker is tapped at 10W, the amplifier can drive up to 24 speakers in a 70V zone.

Q: How does auto load sense work with 70V systems?

A: Auto load sense measures the impedance of the connected 70V speaker circuit after installation and automatically configures the variable power limiter (VPL) to match that load. This protects the speaker circuit and simplifies commissioning without requiring manual level setting.

Q: Can this amplifier be used for both background music and paging?

A: Yes. The LUCIA 240/1-70 is well-suited for distributed audio applications that include both background music playback and voice paging. The onboard DSP and auto load sense support reliable performance across both use cases.

Q: Does the LUCIA 240/1-70 require an external DSP?

A: In most standard 70V installations, no. The amplifier includes onboard DSP with equalization, loudness contouring, and auto load sense. For installations with complex zone control, an external DSP can feed the balanced line input.

Q: What control system integration options are available?

A: The 6-pin GPIO block supports integration with third-party control systems (Crestron, Extron, AMX, etc.) for remote muting, power triggering, or zone control without additional hardware.

Q: Can the LUCIA 240/1-70 be rack-mounted?

A: Yes, with the optional Lab Gruppen LUCIA Rackmount Kit (LUCIA-RACKKIT), which fits one or two LUCIA amplifiers into a standard 19" rack bay occupying 1RU.