Rane | MH 4 | Data Sheet | Rane MH 4 Mojo Headphone Amp Data Sheet

Rane MH 4 Mojo Headphone Amp Data Sheet
DATA SHEET
MH 4
HEADPHONE AMPLIFIER
Mojo Cans Amp
General Description
Very simple. You and up to three other friends want to
listen to the same mix under headphones. Just take the MH 4,
plug in, turn on, adjust your individual volumes, and groove.
The MH 4 provides master stereo Inputs which can be
used to drive the four stereo headphone amplifiers. A Mono
switch is provided on the front panel to drive both channels of
all four amplifiers from a common mono source.
The MH 4 is capable of delivering up to 200 milliwatts
into headphones with rated impedances between 32-600
ohms. The precise amount of power depends on the exact
impedance of the headphone in use and the number of
headphones connected to the unit. Under most conditions, the
MH 4 produces sound pressure levels in excess of 120 dB.
This level is above the threshold of pain and is suitable for
most listeners. See the RaneNote, “Understanding Headphone Power Requirements” for further information (available from the Rane web site).
The Rane Mojo Series maintains sonic and construction
quality not found (until now) in this price range. Designed for
the working musician…simple operation…reduced
features…without compromise in audio quality or dependability.
Features
•
•
•
•
•
Four Stereo Amplifiers
Balanced ¼" Stereo Master Inputs
Extremely Low Noise
Stereo/Mono Switchable
Master Balanced/Unbalanced ¼" TRS Stereo Inputs
•
•
•
•
•
Individual Level Controls and Overload Indicators
Drives 32-600 ohm Headphones
Drives Most Phones to 120 dB SPL
UL/CSA Remote Power Supply (120 VAC)
CE (Low Voltage & EMC) Remote Power Supply (230 VAC)
Data Sheet-1
MH 4
HEADPHONE AMPLIFIER
MH 4 Stereo Headphone Amplifier Features and Specifications
Parameter
Headphone Impedance Range
Inputs: Type
………Connectors
………Impedance
………Maximum Level
Outputs: Type
………Connectors
………Impedance
Power
Overall Gain Range
LED Overload
Frequency Response
Common Mode Rejection Ratio
THD+Noise
Crosstalk, Left to Right
Signal-to-Noise Ratio
Unit: Agency Listing
………120 VAC model
………230 VAC model
Power Supply: Agency Listing
………120 VAC model
………230 VAC model
..........100 VAC model
..........Requirement
..........Maximum Current
Unit: Construction
………Size
………Weight
Shipping: Size
………Weight
Note: 0 dBu = 0.775 Vrms
Data Sheet-2
Specification
32-600
Active Balanced/Unbalanced
¼" TRS
20k
+20
(4) Stereo Amplifiers
¼" Tip = Left, Ring = Right
1
200
Off to +26
3
10-45 kHz
40
0.1
-50
94
Limit
10%
Units
ohms
1%
1
ohms
dBu
max.
min.
±0.5
min.
+0/-3
min.
max.
max.
min.
ohm
mw
dB
dB
dB
dB
%
dB
dBr
Conditions/Comments
For best performance
32 to 150 ohms
Before clipping
20 Hz-20 kHz
re 200 mW/150 ohms
re 200 mW/150 ohms, 20 Hz-20 kHz
re 200 mW/150 ohms, 20 kHz BW
Class 2 Equipment
UL
CSA
CE-EMC EN55020, EN55013
CE-Safety EN60065
National Electrical Code
Exempt Class 2 equipment
Exempt Class 2 equipment
EMC Directive 89/336/EEC
LV directive 73/23/EEC
UL
CSA
CE-EMC
CE-Safety
Built to JIS
18 VAC with Center Tap
750
All Steel
1.75"H x 19"W x 5.3"D (1U)
6 lb
4.5" x 20.3" x 13.75"
12 lb
File no. E88261
File no. LR58948
EMC Directive 89/336/EEC
LV directive 73/23/EEC
Japan only
Rane RS 1 Supplied
RMS Current From Remote Supply
10%
Vrms
mA
(4.4 cm x 48.3 cm x 13.5 cm)
(2.7 kg)
(11.4 cm x 52 cm x 35 cm)
(5.4 kg)
MH 4
HEADPHONE AMPLIFIER
MH 4 Block Diagram
Application Information
Two balanced Inputs provide a master stereo signal to four
stereo headphone amplifiers, with individual stereo Level
controls and Overload indicators. The Master Level control
allows adjustment of the main stereo Input level for proper
matching to any source. In addition, a Stereo/Mono switch
converts the stereo Inputs to mono operation when required.
The MH 4 makes a valuable tool for any band wanting to
practice anywhere, anytime, at any volume, without disturbing a soul. By connecting the MH 4 directly to the mixer
outputs and using headphones instead of amps and speakers,
the entire band can perform at ear shattering levels, with no
feedback, with amazingly cleaner, clearer sound. The MH 4 is
a very cost-effective alternative to renting a practice studio
for every rehearsal.
And finally, everyone wants to know how much power the
MH 4 puts out. The output power depends on the impedance
of the headphones; but, how much power the MH 4 puts out
is the wrong question. How loud will the MH 4 make my
headphones is the right question. See the RaneNote “Understanding Headphone Power Requirements” for the answer.
Data Sheet-3
MH 4
HEADPHONE AMPLIFIER
MH 4 Rear Panel
Architectural Specifications
The headphone console shall have two (2) master inputs
driving four (4) stereo amplifiers wired to four (4) outputs on
the front panel. Sufficient output power shall be provided to
drive most stereo headphones to levels of 120 dB SPL.
Input level controls shall be provided on all inputs with a
gain range from off to +26 dB. A stereo/mono switch shall be
located on the front panel.
The master inputs shall be active balanced/unbalanced
designs terminated with ¼" TRS (tip-ring-sleeve) connectors.
The outputs shall be ¼" TRS connectors wired tip-left, ringright, sleeve-common.
LEDs shall be provided to indicate overload conditions on
each amplifier input.
The unit shall be powered from a U.L. Listed, C.S.A.
Certified, (120 VAC) external power supply, or a (230 VAC)
supply meeting CE requirements. This external supply shall
be provided with each unit.
The unit shall be a Rane Corporation Model MH 4.
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL (425)355-6000 FAX (425)347-7757 WEB http://www.rane.com
Data Sheet-4
All features & specifications subject to change without notice. DOC 102941 PN 07158 4-97
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