The LEA Professional CS34D Connect Series Half-Rack Smart Amplifier delivers four channels of professional amplification in a compact form factor. Rated at 30W per channel at 4Ω, 8Ω, 25V, 70V, and 100V, it supports selectable low-impedance (Lo-Z), 70V, or 100V operation on each channel, making it a flexible solution for installed audio systems.

The CS34D features a 96kHz DSP processor with a 32-bit core, fully routable analog inputs, and integrated Dante networking with AES67 configurability through Dante Controller. Its DSP capabilities include an input matrix and mixer, eight-band parametric EQ per channel, crossover filters, output delay, adjustable voltage limiting, and comprehensive output protection.

For convenient system configuration and monitoring, the amplifier supports browser-based WebUI, LEA Cloud, SharkWare, and third-party APIs. Its network connection options include a built-in Wi-Fi access point, connection to an existing Wi-Fi network, and wired Ethernet. Proprietary Smart Power Bridge Technology provides bridged output functionality without sacrificing an amplifier channel.

Key Features

• Four amplifier channels delivering 30W per channel at 4Ω, 8Ω, 25V, 70V, and 100V.
• Delivers 15W per channel at 2Ω.
• Selectable Lo-Z, 70V, or 100V operation per channel.
• Class D amplification 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.
• Dante 4 × 4 networking at 48kHz with multicast and unicast support.
• AES67 configurable through Dante Controller software.
• Routable input matrix allowing any input to be mixed to any output.
• Eight-band parametric EQ per channel and IIR crossover filters up to 48dB per octave.

Ideal For

• Installed audio systems requiring four amplifier channels.
• Distributed loudspeaker systems using low-impedance or constant-voltage operation.
• Networked audio installations using Dante or AES67.
• Commercial installations requiring remote amplifier control and monitoring.
• Audio systems requiring configurable DSP, speaker protection, and load monitoring.

Inputs & Outputs

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

Frequently Asked Questions

How many channels does the CS34D have?

The CS34D has four amplifier channels.

What is the power output per channel?

It provides 15W per channel at 2Ω and 30W per channel at 4Ω, 8Ω, 25V, 70V, and 100V.

Does the CS34D support Dante and AES67?

Yes. It supports 4 × 4 Dante networking at 48kHz, while AES67 is configurable through Dante Controller software.

What analog inputs are available?

The amplifier includes four balanced analog inputs and four unbalanced RCA inputs. The unbalanced RCA inputs share the same analog input channel as specified by the manufacturer.

What DSP features are included?

DSP features include a routable input matrix, eight-band parametric EQ per channel, IIR crossover filters, 100ms output delay per channel, output protection, adjustable voltage limiting, and load monitoring.

How can the amplifier be controlled?

Control options include the browser-based WebUI, third-party APIs, LEA Cloud, and SharkWare.

What network connection methods are supported?

The amplifier can connect through its built-in Wi-Fi access point, an existing Wi-Fi network, or wired Ethernet.

What are the AC power requirements?

The CS34D operates at 100–240V AC, ±15%, at 50Hz or 60Hz.

Full Technical Specifications

Audio

Model	CS34D
Amplifier Channels	4
Output at 2Ω	15W per channel
Output at 4Ω, 8Ω, 25V, 70V/100V	30W per channel
Amplifier Output Classification	Class D with proprietary Smart Power Bridge Technology
Balanced Analog Inputs	4, with selectable 26dB, 34dB, and microphone-level sensitivity
Unbalanced RCA Inputs	4, with selectable 26dB and 34dB sensitivity
Analog Input Note	Unbalanced and RCA inputs share the same analog input channel
Dante	4 × 4 at 48kHz, multicast or unicast
AES67	Configurable via Dante Controller software
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 DSP processor with 32-bit core and sample rate converters
Input Matrix & 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 parametric EQ per channel
Output Delay	100ms per channel
Output Protection	DC, VHF, and AC mains protection; overtemperature and current limiter; fan-fault detection
User-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, cloud 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