The LEA Professional CS704-ADSP Connect Series Smart Amplifier is a four-channel Class-D amplifier designed for professional installed audio systems that require flexible power, advanced processing, and network-based control. It delivers up to 700 watts per channel at 4Ω, 8Ω, 25V, and 70V/100V, with a rated output of 350 watts per channel at 2Ω. Its support for low-impedance and high-impedance loudspeaker systems makes it suitable for a wide range of commercial audio applications.

The CS704-ADSP features a 96kHz Analog Devices SHARC DSP processor with a 32-bit core and sample rate converters. Its processing capabilities include 2048-tap linear-phase FIR filters per channel, IIR crossover filters up to 48dB per octave, eight-band parametric EQ per channel, and up to four seconds of output delay per channel. Configurable peak-voltage and RMS-voltage limiters, input routing, and real-time load monitoring provide additional control for system tuning and protection.

With LEA Cloud connectivity, the amplifier enables remote control, monitoring, and notifications from compatible devices without requiring a VPN. Its browser-based WebUI, third-party API support, and SharkWare compatibility offer multiple ways to configure and manage installations. Four balanced analog inputs, external I/O for remote on/off and amplifier health monitoring, and a universal switch-mode power supply make the CS704-ADSP a flexible solution for demanding professional AV systems.

Key Features

• Four-channel Class-D amplifier delivering up to 700W per channel at specified loads.
• 96kHz DSP with 2048-tap linear-phase FIR filters per channel.
• Eight-band parametric EQ and up to four seconds of output delay per channel.
• Low-impedance and selectable 70V/100V operation per channel.
• Cloud-based remote control, monitoring, and notifications.
• Browser-based WebUI, third-party API, and SharkWare compatibility.

Ideal For

• Commercial audio installations.
• Corporate offices and conference rooms.
• Educational facilities and lecture halls.
• Houses of worship and hospitality venues.
• Distributed 70V/100V loudspeaker systems.
• Professional AV systems requiring network control and advanced DSP.

What’s in the Box

• LEA Professional CS704-ADSP Smart Amplifier.

Inputs & Outputs

• 4 balanced analog inputs with selectable 26dB or 34dB input sensitivity.
• 4 amplifier output channels supporting low-impedance and 70V/100V operation.
• External I/O input for remote on/off control.
• External I/O output for amplifier health indication.
• Network connectivity through built-in Wi-Fi access point, existing Wi-Fi, or LAN Ethernet.
• Browser-based WebUI and Cloud control access.
• Third-party API and SharkWare control compatibility.

Frequently Asked Questions

How many channels does the LEA Professional CS704-ADSP have?

The CS704-ADSP is a four-channel professional amplifier with output ratings specified separately for each channel.

How much power does the CS704-ADSP deliver?

The amplifier is rated at 700 watts per channel at 4Ω, 8Ω, 25V, and 70V/100V, and 350 watts per channel at 2Ω, according to the manufacturer's specifications.

Does the amplifier support 70V and 100V systems?

Yes. Each channel supports selectable 70V or 100V operation, alongside low-impedance loudspeaker configurations.

What DSP processing is available?

The amplifier includes 96kHz DSP, FIR and IIR crossover filters, eight-band parametric EQ per channel, up to four seconds of output delay per channel, user-adjustable limiters, and real-time load monitoring.

Can the CS704-ADSP be monitored remotely?

Yes. LEA Cloud provides remote control, monitoring, and notifications without requiring a VPN. The amplifier also supports browser-based WebUI control, third-party API integration, and SharkWare.

What protection features are included?

Protection features include DC, VHF, and AC mains protection, over-temperature protection, current limiting, and fan-fault detection.

Full Technical Specifications

Amplifier and Audio Specifications

Amplifier Type	Professional Class-D Smart Amplifier
Number of Channels	4
Output Power at 2Ω	350W per channel
Output Power at 4Ω and 8Ω	700W per channel
Output Power at 25V and 70V/100V	700W per channel
Amplifier Technology	Proprietary Smart Power Bridge
Bridged Output	Supports bridged output functionality without sacrificing another amplifier channel
Analog Inputs	4 balanced inputs
Input Sensitivity	Selectable 26dB or 34dB
THD+N	0.1% from 20Hz to 20kHz
Frequency Response	±0.5dB at 4Ω, 8Ω, 70V, and 100V; -2.5dB at 20kHz at 2Ω
Signal-to-Noise Ratio	105dB, 20Hz–20kHz, referenced to 8Ω
Crosstalk	70dB from 20Hz to 20kHz
Input Routing	Routable matrix with primary and secondary input priority

DSP and Processing

DSP Architecture	Analog Devices SHARC processor with 32-bit core and sample rate converters
DSP Sample Rate	96kHz
FIR Filters	2048 taps per channel at 96kHz
FIR Crossover Options	24dB/octave and 48dB/octave Linkwitz-Riley, linear-phase Brickwall, and custom FIR coefficient loading
IIR Crossover Filters	Up to 48dB/octave
IIR Filter Types	Linkwitz-Riley, Butterworth, and Bessel
Parametric EQ	8-band per channel
Output Delay	Up to 4 seconds per channel
Speaker Limiting	User-adjustable peak-voltage and RMS-voltage limiters
Load Monitoring	Real-time load monitoring and pilot-tone detection from internal or external sources

Protection, Cooling, and Power

Protection	DC, VHF, AC mains, over-temperature, current limiting, and fan-fault detection
Cooling System	Front-to-rear variable-speed fan cooling
Fan Noise	50dB at idle, 57dB at 50%, and 63dB at full speed, measured at 1m
AC Mains Voltage	100–240VAC ±15%
AC Mains Frequency	50Hz or 60Hz
Power Supply	Universal switch-mode power supply with power factor correction
Output Stage	High-efficiency Class D

Control and Networking

Control Interfaces	Browser-based WebUI, LEA Cloud, third-party API, and SharkWare
Network Connections	Built-in Wi-Fi access point, existing Wi-Fi network, or LAN
Cloud Features	Remote control, monitoring, and notifications without a VPN
External I/O	Input toggles remote on/off; output indicates amplifier health
Speaker Configuration	Low-impedance and selectable 70V/100V operation per channel

Physical Specifications

Product Weight	10 lbs
Product Dimensions (L × W × H)	14.25 × 19 × 1.75 inches
Shipping Weight	17.4 lbs
Shipping Dimensions (L × W × H)	20 × 22.75 × 3.75 inches