January 28, 2004
World Leader •In-Rack• Audio & Video Monitoring
WOHLER VMDA-4
“ C o n fi d e n c e P l u s ” D i g i t a l & A n a l o g A u d i o M o n i t o r - 4 S t e r e o C h a n n e l s
Features:
Only One Rack Space High
Powerful 96dB SPL at 2 feet (0.6m)
Select from Balanced or Unbalanced AES/EBU digital and Analog Sources
4 Balanced AES/EBU Inputs
4 Unbalanced AES/EBU Inputs
8 Balanced Analog Inputs (4 Stereo)
8 Balanced Analog Outputs (4 Stereo)
2 Ten-Segment VU Level Meters
Phase / Polarity Indication
Front Panel Speaker Muting
Thorough Magnetic Shielding for Placement next to Video Monitors
Headphone Jack, Mutes Speakers
Blowout-Proof Speakers
Lightweight and Shallow-Depth Chassis
Internal Universal AC Mains Power Supply
Also Available, VMDA-1 with 1 Stereo AES/EBU or Analog Input
Au d io Monitoring
Level Metering
A larm Systems
Toll Free (US): 1.888.5.WOHLER • Tel: 510.870.0810 • Fax: 510.870.0811 • 31055 Huntwood Avenue, Hayward, California 94544, USA
Introducing the VMDA-4, the latest from our
new line of “confidence plus” audio monitors.
A very compact & light, digital & analog audio
monitor at a very cost effective price. The
single-rackspace VMDA-4 offers selectable
monitoring of either 4 stereo analog or 4
AES/EBU digital audio sources, with
excellent full-range fidelity far exceeding that
of competitive units. Two front-firing
midrange-tweeter speakers and a compact
high-performance woofer are arranged in
Wohler Technologies' popular bi-amp design.
All Wohler speaker systems are protected
against blow-out by limiters. The summed
bass feature is important for audible detection
of “out of phase” conditions. Electronic rather
than acoustic cancellation of bass frequencies
provides positive audible detection of out-ofphase (reversed polarity) audio feeds.
The unit features 2 ten-segment VU LED bargraphs level meters meters. Fast and averaging “phase” LEDs give visual alert of “out of
phase” conditions. An analog output of the
selected analog or digital stereo source is provided on the rear panel. Individual illuminated
push-buttons select and indicate which of the
four sources is being monitored. Two or more
pairs of the analog inputs may be summed (as
pairs) by pressing the desired buttons simultaneously (AES inputs cannot be summed).
A separate lighted pushbutton switches
between the selected analog or digital
source(s). A front-panel mute function is
engaged by tapping the Analog/Digital
selector button briefly, the button’s light
blinks while speakers are muted. Muting may
also be activated from a switch remoted from
the rear panel (optional extra). An auxiliary
analog output of the selected analog or digital
source is provided on the rear panel.
The VMDA-4 is completely magnetically
shielded to allow interference-free operation
immediately adjacent to all CRT video
monitors. The light weight and shallow depth
chassis compared to similar-type units, make
it ideal for use in portable and mobile vehicle
applications. Built and rigorously tested in the
USA, the VMDA-4 is backed by a strong
warranty and a “Satisfaction Guaranteed”
return policy.
Video Moni toring
www.wohler.com
sales@wohler.com
WOHLER VMDA-4
“Confidence Plus” Digital & Analog Audio Monitor - 4 Stereo Channels
S P ecifications:
AES/EBU input(s) . . . . . . . . . . . . . . . .4 Bala nced (mini phoenix) or Unbalanced (BNC)
Analog input(s) . . . . . . . . . . . . . . . .8 Balanced (4 Stereo) (mini phoenix)
Rear Panel:
Analog input impedance . . . . . . . . .>100 kOhms balanced
AES/EBU input termination . . . . . . .110 Ohms balanced, 75 Ohms unbalanced
AES/EBU input sampling rate . . . . . .32-48kHz, auto-detecting
Input level for full output
0 dBv analog
(volume full on) . . . . . . . . . . . . . . .-20dBfs digital
Hum and noise . . . . . . . . . . . . . . . .better than -70 dB below full output
Acoustic frequency response . . . . . .80 Hz to 16 kHz (± 6dB)
Peak acoustic output @ 2 feet . . . . .96dB SPL
Electrical distortion . . . . . . . . . . . . .<0.3% at any level below limit threshold
System Diagram:
Acoustic distortion . . . . . . . . . . . . .Typically <2% at any level below limiting,
100Hz - 15KHz
Magnetic shielding . . . . . . . . . . . . .<1 gauss any adjacent surface
Connectors . . . . . . . . . . . . . . . . . . .balanced: mini-phoenix
unbalanced: BNC
Power Consumption . . . . . . . . . . . .<70W
Dimensions (HxWxD) . . . . . . . . . . .1.75 x 19 x 8.5”
(44.5 x 483 x 216mm)
Weight . . . . . . . . . . . . . . . . . . . . .6.8 lbs. (3.1kg)
Power Supply . . . . . . . . . . . . . . . . .100 to 240VAC, 50/60Hz universal input
CE and UL approved
All specifications are subject to improvement
Toll Free (US): 1.888.5.WOHLER • Tel: 510. 870.0810 • Fax: 510.870.0811
31055 Huntwood Avenue, Hayward, California 94544, USA
www.wohler.com • sales@wohler.com