The CS124D Designed for professional installations that need four independently configurable amplifier channels, the LEA Professional CS124D Connect Series combines 120W-per-channel output with networked audio and integrated digital signal processing. Each channel supports Lo-Z, 70V, or 100V operation, allowing the amplifier to accommodate different loudspeaker configurations within a single compact half-rack unit.

The CS124D includes four balanced analog inputs, four unbalanced RCA inputs, and a 4 × 4 Dante interface operating at 48kHz. AES67 can be configured through Dante Controller, while the 96kHz Analog Devices Sigma DSP provides routing, mixing, equalization, crossover filtering, and output delay. Smart Power Bridge Technology adds bridged output functionality without sacrificing an amplifier channel.

System setup and ongoing management are available through the browser-based WebUI, LEA Cloud, SharkWare, or third-party APIs. Installers can connect through the built-in Wi-Fi access point, an existing Wi-Fi network, or Ethernet. Integrated protection and load-monitoring functions help monitor amplifier operation and support reliable performance in installed audio environments.

Key Features

• Four-channel amplification with 120W per channel at 4Ω, 8Ω, 25V, 70V, and 100V.
• 60W per channel at 2Ω.
• Independent selection of Lo-Z, 70V, or 100V operation for each channel.
• Class D amplifier design with proprietary Smart Power Bridge Technology.
• 96kHz Analog Devices Sigma DSP processor with a 32-bit core and sample rate converters.
• Four balanced analog inputs and four unbalanced RCA inputs.
• 4 × 4 Dante audio networking at 48kHz, supporting multicast and unicast.
• Configurable AES67 connectivity through Dante Controller.
• Routable input matrix for assigning and mixing inputs to outputs.
• Eight-band parametric EQ per channel and IIR crossovers up to 48dB per octave.
• 100ms output delay per channel.
• DC, VHF, AC mains, overtemperature, current-limiter, and fan-fault protection.
• Adjustable peak-voltage and RMS-voltage limiting.
• Real-time load monitoring and internal or external pilot tone detection.
• Remote configuration and monitoring through WebUI, LEA Cloud, SharkWare, and third-party APIs.

Ideal For

• Commercial installations requiring four channels with output ratings up to 120W per channel.
• Distributed loudspeaker systems using 70V or 100V lines.
• Low-impedance loudspeaker systems operating at supported impedances.
• Dante-based audio systems requiring four network audio inputs and four network audio outputs.
• Installations needing centralized control, configurable DSP, and loudspeaker monitoring.

Inputs & Outputs

• 4 balanced analog inputs with selectable 26dB, 34dB, and microphone-level sensitivity.
• 4 unbalanced RCA inputs with selectable 26dB and 34dB sensitivity.
• 4 × 4 Dante network audio interface at 48kHz.
• AES67 configuration through Dante Controller.
• 4 amplifier output channels with selectable Lo-Z, 70V, or 100V operation.
• 10/100Mb Ethernet port.
• GPIO port with 4 general-purpose input/output pins.
• External I/O input for remote on/off control.
• External I/O output for amplifier health indication.
• IEC-type AC power inlet.

Frequently Asked Questions

What makes the CS124D suitable for higher-output installations?

It delivers 120W per channel at 4Ω, 8Ω, 25V, 70V, and 100V, with four channels available in one half-rack amplifier.

What output power does it provide at 2Ω?

The rated output is 60W per channel at 2Ω.

Can the four channels use different speaker configurations?

Yes. Each channel can be configured for Lo-Z, 70V, or 100V operation.

What network audio formats does it support?

The CS124D provides 4 × 4 Dante networking at 48kHz and configurable AES67 support through Dante Controller.

What analog connections are provided?

There are four balanced analog inputs and four unbalanced RCA inputs. The manufacturer notes that the unbalanced RCA inputs share the same analog input channel.

Which processing tools are available?

The integrated DSP includes a routable matrix mixer, eight-band parametric EQ per channel, IIR crossover filters, output delay, voltage limiting, protection, and load monitoring.

How is the amplifier managed remotely?

Users can access the browser-based WebUI, LEA Cloud, SharkWare, or third-party API control. Network connectivity is available through Wi-Fi or Ethernet.

What mains power does it require?

It operates at 100–240V AC, ±15%, at 50Hz or 60Hz.

Full Technical Specifications

Audio

Model	CS124D
Amplifier Channels	4
Output at 2Ω	60W per channel
Output at 4Ω, 8Ω, 25V, 70V/100V	120W per channel
Amplifier Classification	Class D with proprietary Smart Power Bridge Technology
Balanced Analog Inputs	4; selectable 26dB, 34dB, and microphone-level sensitivity
Unbalanced RCA Inputs	4; selectable 26dB and 34dB sensitivity
Analog Input Note	Unbalanced RCA inputs share the same analog input channel
Dante	4 × 4 at 48kHz, multicast or unicast
AES67	Configurable through Dante Controller
THD+N	0.1% from 20Hz to 20kHz
Frequency Response	20Hz–20kHz, ±0.5dB at 4Ω, 8Ω, 70V, and 100V; −2.5dB at 20kHz at 2Ω
Signal-to-Noise Level	102dB from 20Hz to 20kHz, referenced to 8Ω

DSP

DSP Architecture	Analog Devices Sigma 96kHz processor with 32-bit core and sample rate converters
Input Matrix & Mixer	Routable matrix; any input can be mixed to any output
Crossovers	IIR filters up to 48dB/octave; Linkwitz-Riley and Butterworth
Parametric EQ	8-band per channel
Output Delay	100ms per channel
Output Protection	DC, VHF, AC mains, overtemperature, current limiter, and fan-fault detection
Adjustable Limiting	Peak voltage and RMS voltage
Load Monitoring	Real-time load monitoring and pilot tone detection from internal or external sources

Control, Monitoring & Networking

User Interface	Browser-based WebUI, third-party API control or SharkWare
Network Connection Methods	Built-in Wi-Fi access point, existing Wi-Fi network, or LAN Ethernet
Ethernet	Fast 10/100Mb Ethernet
External I/O Input	Toggles remote on/off
External I/O Output	Indicates amplifier health
General-Purpose I/O	4 general-purpose input/output pins
AC Mains	100–240V AC, ±15%, 50Hz or 60Hz
Power Supply	Universal switch-mode power supply

Physical Specifications

Product Dimensions (L × W × H)	11.82 × 8.58 × 1.71 in
Shipping Dimensions (L × W × H)	18 × 11 × 2.75 in
Product Weight	7 lbs
Cooling	Front-to-rear variable-speed fan cooling
Fan Noise at Idle	50dB at 1m
Fan Noise at 50% Speed	57dB at 1m
Fan Noise at Full Speed	63dB at 1m