© 2003 Wohler Technologies Inc. ALL rights reserved
4
AMP2A-4S
and
AMP2A-10S
User Manual P/N
821554
Rev-
B
Features
AMP2A-4S and AMP2A-10S
Description
Section 1: General Features and Specifications
AMP2A-10S Front Panel
The
AMP2A
series units are complete, exceptionally high quality stereo audio monitoring systems in compact, two rackspace
cabinets. These models contain 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
AMP2A
series unique audio design has two important
advantages. First, it provides optimally focused sound in an Ultra Near Field
tm
(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 “phase” (polarity) relationships of the signals selected for monitoring.
The
AMP2A-4S
and
AMP2A-10S
models are both audio monitors capable of monitoring two analog source channels (one selected
pair) through the stereo speaker system while simultaneously visually monitoring both channels via two 20-segment tri-color LED
bargraph level meters. Both models feature a rotary switch on the front panel to allow selection of one of four (AMP1A-4S) or one
of ten (AMP2A-10S) analog stereo pair input sources for monitoring.
The rear panel for the
AMP2A-4S
model features
four
selectable stereo pairs of analog inputs on balanced Phoenix connectors. The
rear panel for the
AMP2A-10S
model features
ten
selectable stereo pairs of analog inputs on balanced Phoenix connectors. Both
models offer an analog output of the selected stereo source on two XLR connectors on the rear panel.
2U Stereo Audio Speaker Monitors
• 98 dB SPL at two feet
• Only two rack spaces high
• Excellent high frequency response for positive detection of
background whine and noise
• Audible indication of phase/polarity problems
• Thorough magnetic shielding for placement next to video
monitors
• Numerous alternate control and input options
• Quick and easy installation: simply slide in the rack and
connect audio and AC power
• AMP2A-4S model features
four
selectable stereo pairs of
analog inputs on balanced Phoenix connectors
• AMP2A-10S model features
ten
selectable stereo pairs of
analog inputs on balanced Phoenix connectors
• Both models offer front panel selection of the stereo pair input
source to be monitored
• Two 20-segment LED bargraph display level meters
• Volume and balance controls
• Stereo phase indication LEDs
• Headphone output
• Power indication LED
AMP2A-4S Front Panel
AVG
28
L
40
31
37
34
R
WOHLER
TECHNOLOGIES
POWER
SOURCE
5
16
19
25
22
7
10
13
2
1
0
3
1
PEAK
3
FAST-OUT
PHASE
FAST-IN
ANALOG AUDIO
MONITOR PANEL
AMP2A-4S
SOURCE
1 2 3 4
AVG
WOHLER
TECHNOLOGIES
L
POWER
3
R
16
28
34
37
31
40
22
25
19
3
13
10
7
5
1
0
1
2
PEAK
SOURCE
FAST-IN
PHASE
FAST-OUT
10
1
2
3
4
5
6
7
8
9
SOURCE
ANALOG AUDIO
MONITOR PANEL
AMP2A-10S
