The LEA Professional CS354-ADSP Connect Series Smart Amplifier is a four-channel professional amplifier designed for demanding commercial audio installations. Delivering up to 350 watts per channel at supported output impedances, it combines efficient Class-D amplification with advanced digital signal processing. Its flexible architecture supports both low-impedance loudspeakers and 70V/100V distributed audio systems, making it suitable for a wide range of professional sound applications.

Powered by a 96kHz Analog Devices SHARC DSP processor with a 32-bit core and sample rate converters, the CS354-ADSP provides comprehensive audio processing and system configuration. Features include 2048-tap linear-phase FIR filters per channel, configurable IIR crossovers, eight-band parametric EQ per channel, input routing, and up to four seconds of output delay. User-adjustable speaker limiters and real-time load monitoring help maintain dependable system performance.

The amplifier features LEA Professional's cloud-connected platform for remote control, monitoring, and notifications from compatible personal devices without requiring a VPN. Installers can configure and manage the system through its browser-based WebUI, Cloud control, third-party API, or SharkWare software. With four balanced analog inputs, external I/O for remote power control and fault monitoring, and a universal power supply, the CS354-ADSP offers flexible integration for professional installed audio systems.

Key Features

• Four-channel Class-D amplification with 350W per channel at 4Ω, 8Ω, 25V, and 70V/100V.
• 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.
• Selectable low-impedance and 70V/100V operation per channel.
• Cloud connectivity with remote control, monitoring, and notifications.
• Browser-based WebUI, third-party API, and SharkWare control.

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 installations requiring remote monitoring and DSP control.

What’s in the Box

• LEA Professional CS354-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 CS354-ADSP have?

The CS354-ADSP is a four-channel amplifier rated at up to 350 watts per channel, depending on the selected output configuration.

What loudspeaker systems does this amplifier support?

It supports low-impedance loudspeakers and selectable 70V or 100V distributed audio operation on each channel.

What DSP features are included?

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

Can the amplifier be controlled remotely?

Yes. It supports LEA Cloud for remote control, monitoring, and notifications, as well as a browser-based WebUI, third-party API control, and SharkWare.

What power supply does the CS354-ADSP use?

It uses a universal switch-mode power supply supporting 100–240VAC ±15% at 50Hz or 60Hz.

Does the amplifier include protection features?

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

Full Technical Specifications

Audio Specifications

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
Frequency Response at 2Ω	-2.5dB at 20kHz
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
SP Architecture	Analog Devices SHARC processor
DSP Sample Rate	96kHz
DSP Core	32-bit
Sample Rate Conversion	Supported
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

Protection and Cooling

DC, VHF, AC Protection	Supported
Over-Temperature Protection	Supported
Current Limiter	Included
Fan Fault Detection	Included
Cooling System	Front-to-rear variable-speed fan cooling
Fan Noise at Idle	50dB at 1m
Fan Noise at 50%	57dB at 1m
Fan Noise at Full Speed	63dB at 1m

Control and Networking

User Interface	Browser-based WebUI
Cloud Control	Remote control, monitoring, and notifications
VPN Requirement	No VPN required for Cloud remote access
Network Connections	Built-in Wi-Fi access point, existing Wi-Fi network, or LAN
Third-Party Control	API supported
Software Control	SharkWare
External I/O Input	Toggles remote on/off
External I/O Output	Indicates amplifier health
Speaker Configuration	Direct low-impedance and selectable 70V/100V operation per channel

Power Requirements

AC Mains Voltage	100–240VAC ±15%
AC Mains Frequency	50Hz or 60Hz
Power Supply	Universal switch-mode power supply
Power Factor Correction	Included
Output Stage	High-efficiency Class D

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