The ALC-404D from Community is one of their trio of Amplified Loudspeaker Controllers (ALC), with this model being their 4 channels x 400W version. The ALC series provides additional flexibility for real-world Community loudspeaker system applications with bridged channel pairs supporting driving loads down to 4 ohms at double the power of a single channel.

ALCs provide all of the signal routing, zone switching, DSP processing, protective limiting, remote monitoring, and amplification functions needed between a mixer and the loudspeakers in virtually any Community Professional Loudspeakers application. Standard Ethernet communication protocols allow for fast system design, system control, and remote system monitoring. Analog and Dante® inputs are included for quick and easy integration into any new or existing system. Community-authored loudspeaker presets include equalization, high pass filters, and multi-stage limiters tailored to each model, ensuring consistent sound quality and full loudspeaker protection in every application.

In-depth control and monitoring is accomplished via ArmoníaPlus® System Manager Software, allowing you to tailor the sound and managing the system at a remote, decentralized location. The ALC-404D can also be trusted in mission critical applications, such as fire alarm systems, thanks to the cleverly engineered power supply that allows reliable operation even when connected to a UPS in addition to the per-channel, user-assignable fault-indicating GPIO connectors on the rear panel.

Packing 4 channels into 1 RU, reduces rack costs and minimizes space requirements for the ALC-404D. The industry-leading integrated DSP reduces the need for external outboard equipment, drastically reducing installation effort and expense. Extremely high operational efficiency greatly reduces power consumption, resulting in the lowest thermal dissipation ratings in the industry, and minimizes the need for external cooling devices.

The Amplified Loudspeaker Controller (ALC) provides four channels of power amplification and digital signal processing with analog and Dante inputs. Total available power can be safely distributed asymmetrically across the outputs in any combination of low impedance and 70/100V loads in single ended and/or bridged configurations. Power delivered from each output is individually monitored and automatically limited to the stated, safe operating ranges.

Applications

• Main systems, Central or Distributed, Subwoofers, hi-Z/lo-Z Applications
• Emergency Notification Systems
• Theaters, Restaurants, and Bars
• Houses of Worship
• Gyms and Fitness Centers
• Sports Fields
• Stadiums
• Lecture Halls
• Amusement Parks
• Shops and Stores
• Convention or Business Centers
• Cruise Ships

Features

• Output power optimized to match needs of Community loudspeakers
• Drive low impedance, 70V or 100V loudspeakers on any channel
• Fast and easy access to complete Community loudspeaker library
• 1024 Tap FIR Linear Phase DSP loudspeaker processing
• Factory-optimized multi-stage loudspeaker protection limiters
• Power Sharing technology allows asymmetric output loading
• Community's loudspeaker presets allow software to automatically calculate and display power needs and headroom for each ALC output channel

Specifications

• Output Channels: 4 Hi-Z or Lo-Z (bridgeable per ch. pair)
• Input Channels
  • Analog: 4
  • Dante: 4
• AUDIO
  • Input Sens @8Ω 26 dB 2.48 Vrms
  • Input Sens @8Ω 29 dB 1.76 Vrms
  • Input Sens @8Ω 32 dB 1.24 Vrms
  • Input Sens @8Ω 35 dB 0.88 Vrms
  • Signal-to-Noise Ratio 20 Hz- 20 kHz @ 8Ω: >104 dB(A)
  • Maximum Input Level: 20 dBu
  • Frequency Response: 20 Hz - 20 kHz ±0.5 dB, 1 W @ 8Ω
  • Crosstalk: (1 kHz) -70 dB
  • Input Impedance: 20 kΩ balanced
  • THD+N (from 0.1 W to Full Power): < 0.1% (typical < 0.05%)
  • IMD (from 0.1 W to Full Power): < 0.05%
  • Slew Rate: > 50 V/ μs @ 8Ω, input filter bypassed
  • Damping Factor: > 500 @ 8Ω, 20 Hz - 100 Hz
• DSP
  • AD Converters: 24-bit Tandem™ @ 48 kHz 125 dB(A) Dynamic Range - 0.005 % THD+N
  • DA Converters: 24-bit Tandem™ @ 48 kHz 117 dB(A) Dynamic Range - 0.003 % THD+N
  • Sample Rate Converter: 24-bit @ 44.1 kHz to 192 kHz 140 dB Dynamic Range - 0.0001 % THD+N
  • Internal Precision: 32-bit floating point
  • Latency: 2.5 ms fixed latency architecture
  • Memory/Presets: 128 MB (RAM) plus 512 MB flash for presets
  • Delay: 2 s (input) + 100 ms (output) for signal alignment
  • Equalizer: Raised-cosine, custom FIR, parametric IIR: peaking, hi/lo-shelving, all-pass, band-pass, band-stop, hi/lo pass
  • Crossover: Linear phase (FIR), Butterworth, Linkwitz-Riley, Bessel: 6 dB/oct to 48 dB/oct (IIR)
  • Limiters: TruePower™, RMS voltage, RMS current, Peak limiter
  • Damping Control: Active DampingControl™ and LiveImpedance™ measurement
• OUPUT STAGE
  • Max output power per channel @ 8Ω 400 W
  • Max output power per channel @ 4Ω 400 W
  • Max output power per channel @ 2Ω 400 W
  • Max output power @ 4Ω (Bridged) 800 W
  • Max output power @ 8Ω (Bridged) 800 W
  • Max output power @ Hi-Z 100V distributed line 400 W
  • Max output power @ Hi-Z 70V distributed line 400 W
  • Max Shared Power (all channels) 1200 W
  • Max Unclipped Output Voltage @8Ω 80 V peak
  • Maximum Output Current 33 A peak
• POWER & PHYSICAL
  • Power Supply: Universal regulated switch mode with PFC, SRM
  • Nominal Voltage (± 10%): 100-240 V @ 50-60Hz
  • Operating Voltage: 60-264 V (with reduced power below 90 V)
  • Ambient Operating Temperature: 0° - 45° C; 32° - 113° F
  • Ambient Relative Humidity: 0-95% (non-condensing)
  • AC Mains Connector: IEC C20 inlet (20 A max) Region-specific power cord provided
  • Dimensions (H x W x D): 1.75 x 17.4 x 14.7 in (44 x 442 x 373 mm)
  • Weight: 16.2 lbs (7.3 kg)
  • Shipping Weight: 25 lbs (11.3 kg)