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Lecture Hall

Steep Tiered Seating

This is a space usually dedicated to lectures or small theatrical screenings. The seating area is sharply raised.

Smaller format lecture spaces can benefit from several different
approaches which have trade-off advantages:
 
Front Source [Left/Right]: Two sources spaced strategically create an acoustic “null” in the direct sound arriving to the center of the presentation area. Microphones in this area will benefit from increased GBF (Gain Before Feedback). Pay close attention to horn pattern selection to ensure that 
excess coverage does not reduce GBF for the presenter.
 
Two (2) IP600/800
(narrow horizontal coverage)
Two (mirror image) loudspeakers cover the entire space with the least number of loudspeakers
 
Suggested model families:
I SERIES (IP600/800) and V SERIES (V2-26, V2-28, V2-32, V2-35)
 
Distributed Source: To raise GBF and improve localization for most seats,
an array of two or three compact models addresses each of the two seating zones. This reduces the projection distances and the direct SPL projected onto the presenter’s area. It can also help with video projector paths, sight lines, and aesthetics.
 
Four to Six (4-6) IC600
Two to three compact models arrayed to cover each half (lower/ upper) of the seating sections 
 
Suggested compact model families:
I SERIES (IC600) and V SERIES (V2-6, V2-8, V2-26, V2-28)
 
Technical Considerations
 

Amplified Loudspeaker Controllers

Community recommends our series of Amplified Loudspeaker Controllers (ALC) for all Community loudspeaker applications, like those shown in this application guide. 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 in each model, 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.

ALC Application Note

Total available power can be safely distributed asymmetrically across the outputs in any combination of low impedance and 70V/100V loads.  Power delivered from each output is individually managed; total shared power per ALC is monitored and limited independently by the power supply.

ALC-404D

4 inputs (Analog and/or Dante®)

4 channels of amplification and DSP processing

Each channel provides up to 400W of power into low impedance or 70V/100V loads, stable to 2Ω

In bridged mode, each pair of channels provides up to 800W into 8Ω, 4Ω, or 70V/100V loads

Total shared power not to exceed 1200W

Perfect for Small R SERIES, V SERIES, Compact I SERIES, W SERIES (W2), and ENT200 models, and zoned C SERIES & D SERIES applications

ALC-1604D

4 inputs (Analog and/or Dante®)

4 channels of amplification and DSP processing

Each channel provides up to 1600W of power into low impedance or 70V/100V loads, stable to 2Ω

In bridged mode, each pair of channels provides up to 3200W into 4Ω, or 70V/100V loads

Total shared power not to exceed 4800W

Perfect match for Larger R SERIES & W SERIES, I SERIES, IV6 and ENT-FR

ALC-3202D

2 inputs (Analog and/or Dante®)

2 channels of amplification and DSP processing

Each channel provides up to 3200W of power into low impedance or 70V/100V loads

In bridged mode, each pair of channels provides up to 6400W into 4Ω, or 70V/100V loads

Total shared power not to exceed 6400W

Perfect for R6-MAX, I SERIES Subwoofers and larger IV6 Arrays

Technical Information 

For power and full technical information refer to ALC spec sheets

For full DSP Settings/Tunings visit, here

Technical Support

Visit www.communitypro.com to learn more, or contact the Community TAG Team (Technical Applications Group) for technical and applications assistance at 1+ (610) 876-3400 or tagteam@communitypro.com

Design Guide

The Presentation & Performance Design Guide can be downloaded, here.

*Dante® is a registered trademark of Audinate Pty Ltd.