User manual

ManualsBrandsWohler ManualsComputer equipmentAMP2-DA

AMP2-DA Instruction and Service Manual P/N 821505 Rev-B

Features

The AMP2-DA is a complete, exceptionally high quality AES/Analog stereo audio monitoring system in a compact, two rackspace

cabinet. It contains three audiophile-quality drivers and three power amplifiers; two amplifiers (and two speakers) that reproduce

midrange and high frequency information in stereo, and a third amp/driver combination (and speaker) that handles summed Low

Frequency (LF) information below the 500 Hz crossover point. The AMP2 series unique audio design has two important

advantages. First, it provides optimally focused sound in an Ultra Near Field

(1 to 3 feet) environment. This allows higher SPL

for the operator while reducing overall ambient sound and adjacent bay crosstalk. Second, electronic rather than acoustic cancellation

of bass frequencies provides positive audible detection of reversed polarity (“out of phase”) audio feeds. A unique LED display

also visually shows all signals present and their “phase” (polarity) relationships.

AES/EBU or analog inputs may be selected for monitoring via a front panel toggle switch. The user may also select one of two

AES/EBU inputs on the rear panel with a front panel toggle switch. The standard AMP2-DA model features two AES/EBU inputs

on unbalanced 75 Ω BNC conectors while the special order option AMP2-DA/X model features these inputs on two balanced 110

Ω XLR connectors. Additionally there are two analog inputs and two analog outputs (from the selected digital source) on

balanced 110 Ω XLR connectors.

Two wide-range, 53-segment high-resolution LED bargraph level meters are provided for the left and right channels (of the

selected source) for accurate metering. The standard display mode is set as a single segment PPM "dot" above a VU bar; each

segment's color being fixed according to its position on the scale. Other display modes are selectable via a DIP switch, which is

accessible through holes in the top cover. Level meter gain is also configurable via this same DIP switch.

AMP2-DA

Powered Digital/Analog Audio Monitor Unit

Description

AMP2-DA Front Panel

Section 1: General Features and Specifications

• 2U high: highest fidelity in minimum rackspace

• Two AES/EBU inputs on BNC connectors

• AES/EBU 1 and 2 input source select via front panel

toggle switch

• AES signal/error indication LED on front panel

• Analog stereo inputs on XLR connectors

• Analog outputs of the digital source on XLR connectors

• Analog/Digital source select via front panel toggle

switch

• Two 53-segment tri-color LED bargraph meters

• User selectable meter Display Mode and Gain

• Phase (polarity) indication for left and right channels

• Headphone output

WOHLER

TECHNOLOGIES

POWER

FAST

PHASE

AVG

AMP2-DA

MONITOR PANEL

DIGITAL AUDIO

AES

SOURCE

DIGITAL

ANALOG

SOURCE

DIGITAL

SOURCESOURCE