AMP2-V2DA 2U Digital/Analog Audio Speaker Monitor with Two AES Inputs on BNC and XLR, Four Analog Inputs on Phoenix, Four Analog Outputs From AES on Phoenix, Selected Analog Stereo Outpts on XLR, Four 53-Segment Level Meters, and Phase Indication Document P/N 821539 Rev. A User Manual CONTENTS Title and Contents ...................................................... 1 Introduction ......................................................................................
Important Safety Instructions 1) Read these instructions. 2) Keep these instructions. 3) Heed all warnings. 4) Follow all instructions. 5) Do not use this apparatus near water. 6) Clean only with dry cloth. 7) Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. 8) Do not install near any heat source such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
AMP2-V2DA User Manual P/N 821539 Rev-A Sect. 1: General Features and Specifications Section 1 General Features and Specifications Description Features Applications Specifications © 2001 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 1: General Features and Specifications AMP2-V2DA Powered Analog/DigitalAudio Monitor SOURCE POWER 8 6 4 2 0 2 SOURCE 6 1 AVG 15 12 8 6 4 2 0 2 ANALOG AES 1 6 DIGITAL 10 12 15 18 22 26 30 35 40 50 WOHLER TECHNOLOGIES SOURCE PHASE FAST 15 12 1 2 3 4 1 2 3 4 2 3 LEFT SPKR AMP2-V2DA 10 12 15 18 22 26 30 35 40 50 AES 2 DIGITAL AUDIO MONITOR PANEL 4 RIGHT SPKR AMP2-SDA Front Panel Description The AMP2-V2DA is a complete, exceptionally
AMP2-V2DA User Manual P/N 821539 Rev-A Section 1: General Features and Specifications Applications The AMP2-V2DA is ideally suited for use in VTR bays, mobile production vehicles, teleconferencing installations, multimedia systems, satellite links and cable TV facilities, and on-air radio studios. Designed and manufactured in the U.S., the AMP2-V2DA is backed by a strong warranty and a satisfaction guaranteed return policy.
AMP2-V2DA User Manual P/N 821539 Rev-A 6 © 2001 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 2 Operation Installation Front Panel Features Rear Panel Features © 2001 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A 8 © 2001 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 2: Operation Installation Mounting NOTE: Be sure to set the level meter Gain Calibration and Display Mode DIP switch (accessed through the top cover) and Input Termination and Input Gain Calibration (accessed through the rear panel), BEFORE installing the unit into an enclosed rack or console. See pages 14 and 22 for setting information.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 2: Operation Front Panel Features Please refer to Figure-2a on the following page to familiarize yourself with the front panel features of the AMP2-SDA unit. The following sections describe these features and are referenced, by number, to Figure-2a. 1 Speakers The AMP2-V2DA internal speaker system is comprised of two mid-range tweeter speakers (left and right) and one woofer speaker (center).
WOHLER TECHNOLOGIES 1 2 POWER 1 SOURCE 15 12 6 8 6 4 2 0 2 10 12 15 18 22 26 30 35 40 50 3 2 4 ANALOG SOURCE 3 4 DIGITAL 1 2 LEFT SPKR 5 6 7 8 FAST PHASE 1 9 AVG AES 1 AES 2 1 2 3 4 10 RIGHT SPKR 5 3 SOURCE 15 12 8 6 4 2 0 2 6 10 12 15 18 22 26 30 35 40 50 3 11 4 1 DIGITAL AUDIO MONITOR PANEL AMP2-V2DA 11 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 2: Operation Front Panel Features (Continued) 10 Balance Control Pot This pans the volume balance between the left and right speakers. If the balance is adjusted hard left or hard right, a slight left/ right channel mix is retained (only in low bass frequencies) so that phase discrepancies can be discerned.
WOHLER TECHNOLOGIES 1 2 POWER 1 SOURCE 15 12 6 8 6 4 2 0 2 10 12 15 18 22 26 30 35 40 50 3 2 4 ANALOG SOURCE 3 4 DIGITAL 1 2 LEFT SPKR 5 6 7 8 FAST PHASE 1 9 AVG AES 1 AES 2 1 2 3 4 10 RIGHT SPKR 5 3 SOURCE 15 12 8 6 4 2 0 2 6 10 12 15 18 22 26 30 35 40 50 3 11 4 1 DIGITAL AUDIO MONITOR PANEL AMP2-V2DA 13 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 2: Operation Rear Panel Features Please refer to Figure-2b on the following page to familiarize yourself with the rear panel features of the AMP2V2DA unit. The following sections describe these features and are referenced, by letter, to Figure-2b. A Power Connector Attach a standard IEC-320 power cord between this connector and mains power (100 - 250VAC, 50/60 Hz).
AES IN 2 OUT 1 IN 2 TERM 2 1 2 3 4 D OUT 2 C -20 -20 DIGITAL GAIN CALIB dB dBFS +4 -18 -9 +8 0 +6 1 2 GAIN CALIB. E 2 3 3 4 4 ANALOG IN 2 1 1 CONVERTED ANALOG OUT HI LO AES IN 1 IN 1 TERM 1 AES/EBU PORTS C HI LO INTERNAL POWER B HI LO UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE SERIAL NUMBER 100-240 VAC 50/60 Hz A HI LO F G CH. A (L) CH. B (R) SELECTED ANALOG OUTPUT H AMP2-V2DA 253362 15 Wohler Technologies Inc.
Section 2: Operation AMP2-V2DA User Manual P/N 821539 Rev-A Rear Panel Features (Continued) F Analog Input Connectors (1-4) These four analog input connectors accept standard analog audio signals. These four 3-pin male Phoenix connectors are configured for a balanced 200k Ω connection. Phoenix connector pin-out information is silk-screened just below the CONVERTED ANALOG OUT connectors (Item G).
AES IN 2 OUT 1 IN 2 TERM 2 1 2 3 4 D OUT 2 C -20 -20 DIGITAL GAIN CALIB dB dBFS +4 -18 -9 +8 0 +6 1 2 GAIN CALIB. E 2 3 3 4 4 ANALOG IN 2 1 1 CONVERTED ANALOG OUT HI LO AES IN 1 IN 1 TERM 1 AES/EBU PORTS C HI LO INTERNAL POWER B HI LO UNDERWRITERS LABS SEE POWER SUPPLY LABEL ON SIDE SERIAL NUMBER 100-240 VAC 50/60 Hz A HI LO F G CH. A (L) CH. B (R) SELECTED ANALOG OUTPUT H AMP2-V2DA 253362 17 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A 18 © 2001 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3 Technical Information • General Technical Observations • AES to Analog Converter Module PCB (919050) • Level Meter Settings and Specifications • Level Meter Bargraph "0" (Zero) Fine Adjustment • Level Generator (919126) and LED Driver (919110) PCB Descriptions • AMP2-V2DA Interconnect Block Diagram © 2001 Wohler Technologies Inc.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3: Technical Information General Technical Observations General Mechanical Observations Elimination of cabinet and component sympathetic vibrations (resonances) requires considerable attention to mechanical details. Because of this, and the physical constraints of the speaker’s acoustic enclosures, even minor changes to any of the mechanical details of the unit can seriously impair its acoustic performance. This especially applies to the speaker baffles.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3: Technical Information AES/EBU to Analog Converter Module PCB (919050) Description The Digi-2 (dual input AES/EBU to analog converter module PCB) allows selected Wohler Technologies products to receive input signals in the AES/EBU or SPDIF digital audio data formats. Sampling rate and format selection are sensed and set automatically. Two front panel mounted bi-color (red/green) LEDs provide visual indication of input signal status.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3: Technical Information Level Meter Settings and Specifications Level Meter DIP Switch Settings A DIP switch module, accessed through holes in the top cover, allows the user to set the Bargraph Display Mode and Meter Input Gain Calibration. There is one DIP switch module for each pair of meter bargraphs. There are four sections (1, 2, 3, 4) on each DIP switch module.
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3: Technical Information Level Meter Bargraph "0" (zero) Fine Adjustment Note: For range setting, use the Meter Input Gain Calibration/Bargraph Display Mode DIP Switches 1) Removal of the Top Cover Remove the top cover screws (2 along upper front panel, 2 per each side, 3 along upper rear panel). The 919126 PCB is vertically mounted to chassis bottom just behind the front panel mounted LED driver PCB (see photo below).
4 3 2 © 2001 Wohler Technologies Inc. ALL rights reserved Selected Output (L and R) 1 2 3 4 Rear Panel 4 3 2 1 1 4 3 2 D D A D A D A 4 3 2 1 = XLR-M, 3-Pin, Male = XLR-F, 3-Pin, Female = BNC, Female Right Left SOURCE 2 3 4 1 Analog Input Impedances: Phoenix = 200K Ω, Bal.
Wohler Technologies, Inc. 31055 Huntwood Avenue Hayward, CA 94544 Phone: (510) 870-0810 Fax: (510) 870-0811 US Toll-Free: 1-888-596-4537 www.wohler.com support@wohler.
AMP2-V2DA User Manual P/N 821539 Rev-A Wohler Technologies, Inc. Wohler Technologies, Inc. 713 Grandview Drive 31055 Huntwood Avenue South San Francisco, CA 94080 Hayward, CA 94544 650 589-5676 Fax: 650 589-1355 Phone: (510) 870-0810 Fax: (510) 870-0811 web: www.wohler.com US Toll-Free: 1-888-596-4537 e-mail: support@wohler.com www.wohler.com support@wohler.com © 2001 Wohler Technologies Inc.
