The VM Series, from our line of “confidence plus” audio monitors are very compact and light, digital and analog audio monitors at very cost effective prices. The single-rack space monitors offer excellent fullrange 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 blowout 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 outof-phase (reversed polarity) audio feeds. The units feature 2 ten-segment VU LED bar graph level meters. Fast and averaging “phase” LEDs give visual alert of “out of phase” conditions. A three-way toggle switch selects between the analog or digital inputs. Muting may also be activated from a switch remote from the rear panel (optional extra). An auxiliary analog output of the selected analog or digital source is provided on the rear panel.
The VM Series monitors are 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 them ideal for use in portable and mobile vehicle applications.
FeaturesOnly 1RUPowerful 96dB SPL at 2 feet (0.6m)2 10-segment VU level metersPhase /polarity indicationConverts 110 balanced AES (Phoenix) to/from 75 unblanced AES (BNC)Headphone jack mutes speakersBlowout-proof speakers
BenefitsThorough magnetic shielding allows placement next to video monitors.Select from analog or digital sources.
VMMDA-1 and VMDA-4
VMMDA-12-channel HD/SD-SDI,AES and analog monitorwith metering and SDIsub-group selector.
VMDA-42-channel AES and8-channel analog audiomonitor with meteringthat either selects 1 of 4AES or analog pairs, orsums any of the 4 analogpairs
AESA HDSDI
2-Channel Audio Monitors
Order Part NumbersVMMDA-4: 8113-0050 (Analog, AES/EBU, HD/SD-SDI)VMDA-1: 8111-0040 (Analog, AES/EBU)
Tel +1-510-870-0810
www.Wohler.com+1-510-870-0811Fax
TechnologiesWohlerLEFT
RIGHT
OUTPUTANALOG
LOHI
AES 1SDI IN
253234-01
LOHI
AES 1
TERM.
ANALOG INPUT
LEFT
RIGHT
HI
LO
SDI OUT
RS232
50/60 Hz 1.0 A100-240 VAC
SERIAL NO. MONTH
YEAR
WohlerTechnologies
+1-510-870-0810+1-510-870-0811
www.Wohler.comFaxTel
VMDA-4
RIGHT
253890-01
LEFT
ANALOGOUTPUT
ANALOG INPUT
LO
AES 1
HI
LO
AES 3
HI
AES 2
AES 1TERM. 1
AES 2TERM. 2
AES 4
LOHI
HI
HI
LO LO
AES 3TERM. 3TERM. 3
AES 4TERM. 4TERM. 4
1 2 3
RIGHT
LOHI
LEFT
4
HI
LO
100-240 VAC50/60 Hz 1.0 A
SERIAL NO.
MONTH YEARMADE IN U.S.A.
Rear Panels
BASEBAND STREAM FILE
VMMDA-1
VMDA-4
VMMDA-1 Block Diagram
Specifications VMMDA-1 VMDA-4Dimensions (H x W x D) 1RU in standard 19” rack: 1.75” x 19” x 10”
(44.5 mm x 483 mm x 254 mm)1RU in standard 19” rack: 1.75” x 19” x 9.0” (44.5 mm x 483 mm x 246 mm)
Shipping Weight / Net Weight 13 lbs (5.90 kg) 10 lbs (4.50 kg)
Power Requirements Power to the unit is 100 to 240 VAC ± 10%, 50/60Hz.
Supplied Accessories AC power cord
Inputs 2 balanced analog: (mini Phoenix)1 AES: (mini Phoenix/BNC)1 SD/HD-SDI (BNC)
8 balanced analog (mini Phoenix)4 AES (mini Phoenix/BNC)
Outputs 2 selected analog (mini Phoenix)1 re-clocked SDI (BNC)
2 selected analog (mini Phoenix)
Analog Input Impedance >100k W balanced
AES Input Impedance AES 75 W Unbalanced and 110 W Balanced
Digital Input Sampling Rate 32 to 48 kHz, auto-sensing
Hum and Noise Better than -70 dB below full output
Electrical Distortion Less than 0.3% at any level below limiting threshold
Acoustic Distortion Typically < 2% at any level below limiting, 100 Hz-15 KHz
View the complete list of specifications online at wohler.com
VMMDA-1 and VMDA-42-Channel Audio Monitors
Input (1-2)
Input (Unbal.)
Input (Bal.)
InputHD/SD-SDI
Analog
AES
OutputAnalog Stereo
Output of Selected Source
Analog to Digital
Converter
D to AConverter
AESReceiver
Left Speaker
Stereo Analog Ampli�er
Volume Balance
WooferSpeaker
Phase IndicationRight Speaker
Headphone10-SegmentLevel Meters
ANA
AESSDI
Analog/Digital/Mute Select
Re-Clock
G1-1,2G1-3,4G2-1,2G2-3,4G3-1,2G3-3,4G4-1,2G4-3,4
Group/SubgroupSelect
SDI to AES
De-Embed
SDIDecoder
1
Analog StereoInputs
(1-4)
AESReceiver
Analog to Digital
Converter
Analog/Digital/Mute Select
D to AConverter
Left Speaker
Stereo Analog Ampli�er
Volume Balance
WooferSpeaker
Phase IndicationRight Speaker
Headphone
10-SegmentLevel Meters
AM
D
2
3
4
1
2
3
4
A
D
A
D
A
D
Channel Select
(AES = 1 of 4 Stereo Pairs Only)
(Analog = Sum 1-4 Stereo Pairs to L/R)
Left
Right
1 2
3 4
12
34
M
M
MAnalog Stereo
Output of Selected Source
AESInputs
(Unbal.)
AESInputs(Bal.)
VMDA-4 Block Diagram
Wohler Technologies, Inc.Worldwide Headquarters31055 Huntwood Avenue
Wohler Technologies/APAC45/F, The Lee Gardens33 Hysan AvenueCauseway Bay, Hong Kong
Wohler Technologies/EMEASuite 3, Medaxon House Mill Mead, Staines TW18 4UQ, UK Infinite Possibilities.
Specifications subject to change, errors and omissions excepted.All trademarks, product names and logos are the property of their respective owners. Any rights not expressly granted herein are reserved. ©2018, Wohler Technologies Inc.
Rev:July 2018
Wohler Technologies Inc., 1280 San Luis Obispo Ave. Hayward, California 94544, USA+1 510 870 0810 | [email protected] | www.wohler.com