The LEA Professional CS704-G Connect Series Smart Amplifier is a four-channel professional amplifier designed for small- to medium-scale commercial audio installations. Delivering up to 700 watts per channel at 4Ω, 8Ω, 25V, and 70V/100V, it supports low-impedance loudspeakers and selectable high-impedance distributed audio systems. Its flexible channel configuration makes it suitable for installations requiring multiple independent audio zones.

Built around a highly efficient Class-D output stage and Analog Devices 96kHz DSP, the CS704-G provides integrated audio processing and system protection. Features include flexible input routing, crossover filters up to 48dB per octave, eight-band parametric EQ per channel, adjustable voltage limiting, and real-time load monitoring. Smart Power Bridge technology also enables bridged output functionality without sacrificing another amplifier channel.

The CS704-G offers browser-based WebUI access, third-party API control, and LEA Cloud connectivity for remote configuration, monitoring, and notifications. Its four balanced analog inputs can be routed through the input matrix, while external I/O supports remote on/off control and amplifier health monitoring. This G-model connects through a wired LAN connection and does not support Wi-Fi.

Key Features

• Four-channel Class-D smart amplifier.
• 700W per channel at 4Ω, 8Ω, and 70V/100V.
• Selectable low-impedance and 70V/100V operation per channel.
• 96kHz Analog Devices DSP with 8-band parametric EQ per channel.
• Browser-based WebUI, third-party API, and LEA Cloud control.
• Wired LAN connectivity with external I/O for remote control and fault monitoring.

Ideal For

• Commercial sound installations.
• Corporate offices and conference rooms.
• Educational facilities.
• Hospitality and retail environments.
• Houses of worship.
• Multi-zone 70V/100V and low-impedance audio systems.

What's in the Box

• LEA Professional CS704-G 4-Channel Smart Amplifier.

Inputs & Outputs

• 4 balanced analog audio inputs with selectable 26dB or 34dB input sensitivity.
• Amplifier outputs supporting 2Ω, 4Ω, 8Ω, 25V, and 70V/100V operation according to the specified power ratings.
• Wired LAN connection for WebUI and Cloud connectivity.
• External I/O input for remote on/off control.
• External I/O output for amplifier health indication.

Frequently Asked Questions

How many channels does the CS704-G provide?

The CS704-G is a four-channel amplifier, with power ratings specified per channel.

What is the output power per channel?

It delivers 350W per channel at 2Ω and 700W per channel at 4Ω, 8Ω, 25V, and 70V/100V, according to the published specifications.

Does the CS704-G support 70V and 100V systems?

Yes. Each channel can be configured for low-impedance operation or 70V/100V high-impedance applications.

Does this amplifier support Wi-Fi?

No. The CS704-G is designed for wired LAN connections and does not support Wi-Fi connectivity.

Can the amplifier be controlled remotely?

Yes. It supports browser-based WebUI control, third-party API integration, and LEA Cloud remote control and monitoring.

Full Technical Specifications

Amplifier and Audio Specifications

Amplifier Channels	4 Channels
Power per Channel at 2Ω	350 Watts
Power per Channel at 4Ω, 8Ω, 25V	700 Watts
Power per Channel at 70V/100V	700 Watts
Amplifier Class	Class D
Smart Power Bridge	Yes
Output Modes	Lo-Z, 70V, 100V
Channel Configuration	Selectable per Channel
THD+N	0.1% (20Hz–20kHz)
Frequency Response	20Hz–20kHz, ±0.5dB at 4Ω, 8Ω, 70V, and 100V
Frequency Response at 2Ω	-2.5dB at 20kHz
Signal-to-Noise Ratio	105dB (referenced to 8Ω)
Crosstalk	70dB (20Hz–20kHz)
Analog Inputs	4 Balanced Inputs
Input Sensitivity	Selectable 26dB / 34dB

DSP & Signal Processing

DSP Processor	Analog Devices Sigma
DSP Sample Rate	96kHz
DSP Core	32-bit
Sample Rate Conversion	Supported
Input Matrix	Routable Input-to-Output Matrix
Input Priority	Primary and Secondary
Crossover Filters	Up to 48dB/Octave IIR
Crossover Types	Linkwitz-Riley and Butterworth
Parametric EQ	8 Bands per Channel
Output Delay	100ms per Channel
User-Adjustable Limiting	Peak Voltage and RMS Voltage
Output Protection	DC, VHF, AC Mains, Overtemperature, and Current Limiter
Load Monitoring	Real-Time Monitoring and Pilot Tone Detection

Network & Control

User Interface	Browser-Based WebUI
Cloud Connectivity	LEA Cloud
Third-Party Control	API Control
Network Connection	Wired LAN
Wi-Fi Support	Not Supported
Remote Monitoring	Yes
Remote Control	Yes
VPN Requirement for Cloud Access	Not Required
External I/O Input	Remote On/Off
External I/O Output	Amplifier Health Status

Power & Electrical Requirements

AC Mains	100–240VAC ±15%
Operating Frequency	50Hz / 60Hz
Power Supply	Universal Switch-Mode
Power Factor Correction	Yes
Output Stage	High-Efficiency Class D
Cooling System	Variable-Speed Fan
Cooling Direction	Front to Rear

Connectivity & Protection Features

Analog Connectivity	4 Balanced Inputs
External Control	Remote On/Off
Fault Monitoring	Amplifier Health Indication
Load Protection	DC and VHF Protection
AC Mains Protection	Supported
Thermal Protection	Overtemperature Protection
Current Protection	Current Limiter
Fan Monitoring	Fan Fault Detection
Load Monitoring	Internal or External Pilot Tone Detection
Network Management	WebUI, LEA Cloud, and Third-Party API
Remote Access	Cloud-Based Control and Monitoring

Physical Specifications

Product Dimensions (L × W × H)	14.25 × 19 × 1.75 inches
Product Weight	14 lbs
Shipping Dimensions (L × W × H)	20 × 22.75 × 3.75 inches
Shipping Weight	18.7 lbs
Rack Format	1U
Fan Noise at Idle	50dB at 1m
Fan Noise at 50% Speed	57dB at 1m
Fan Noise at Full Speed	63dB at 1m