Appendix C - AV Equipment Cut Sheets

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Digi-Loop™ Medium-area single and dual-output loop amplifiers Rear View - DL107 NET D Rear View - DL207 NET D Architectural / Engineering Specifications The loop amplifier shall have a RJ-45 ethernet jack to provide configuration capability over an ethernet (10 base T) network. It shall have an optional RJ-45 Dante ethernet jack (“D” models only). It shall have a USB jack to provide firmware upgrades to the amplifier using a computer. It shall have one MIC/LINE LEVEL XLR 3-pin input, balanced or single-ended, with 24 V phantom supply in microphone mode. It shall have one LINE LEVEL 3-pole terminal block input, balanced or single-ended. It shall have a configurable PRIORITY INPUT function. It shall have a 70-100 V, 2-pole terminal block input, to provide a high/speaker-level input connection for use with distributed speaker systems. It shall have an internal frequency generator for calibration providing 100 Hz, 500 Hz, 1 kHz, 2.5 kHz and 5 kHz tones, and Pink Noise. It shall have one LINE OUTPUT, balanced or single-ended to provide loop-through connections for line level signals going to other equipment such as recording devices or additional loop amplifiers. There shall be four model options: single-output, dual-output, single output with Dante™ input, and dual-output with Dante™ input. It shall have a 1/4” Headphone jack on front panel for monitoring of inputs or outputs, selectable in the menu. It shall have a loop fault relay (NC,NO) output for triggering external systems when a loop fault occurs. It shall provide an output drive voltage of up to 16.1 Vrms, 22.8 Vpk per output. It shall provide an output current of up to 9.5 Arms, 13.4 Apk per output. It shall have a front control interface consisting of a backlit LCD screen and control button/dial. It shall have adjustable settings for input mixing, parametric equalization, compression, frequency-shaping, metal loss compensation, high and low-pass filters, AGC and audio delay. It shall display warnings for LOOP FAULT (open loop, shorted loop or out of impedance range), OVER TEMP, and CLIPPING. It shall have protection against loop faults and overheating (amplifier shuts down). It shall be controllable by devices such as a Windows Surface Tablet, or PC, with PC App software installed. It shall be compatible with either US or international power systems with the appropriate power cord. Performance shall meet IEC 60118-4 system performance requirements when loop system is designed and installed correctly. Specifications/testing shall conform to IEC 62489-1 benchmark testing standards The single-output loop amplifier shall be the Williams Sound model DL107 NET. The dual-output loop amplifier shall be the Williams Sound model DL207 NET. The single-output loop amplifier with the Dante input shall be the Williams Sound model DL107 NET D. The dual-output loop amplifier with the Dante input shall be the Williams Sound model DL207 NET D.