Rane | HC 4 | Data Sheet | Rane HC 4 Headphone Amplifier Data Sheet

Rane HC 4 Headphone Amplifier Data Sheet
DATA SHEET
HC 4
HEADPHONE AMPLIFIER
1
SOURCE
2
4
MONO
2
STEREO
PHONES
OL
4
8
0
3
6
2
10
LEVEL
PHONES
OL
4
8
0
4
6
2
10
LEVEL
6
8
0
PHONES
OL
10
LEVEL
4
6
0
10
2
PHONES
OL
HC 4
HEADPHONE
CONSOLE
8
LEVEL
POWER
General Description
Very simple. You and up to three other friends want to listen to
the same mix under headphones. Just take the HC 4, plug in,
turn on, adjust your individual volumes, and groove.
The HC 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.
Features
•
•
•
•
•
Four Stereo Amplifiers
Balanced ¼" Stereo Master Inputs
Extremely Low Noise
Stereo/Mono Switchable
Master Balanced/Unbalanced ¼" TRS Stereo Inputs
The HC 4 is capable of delivering up to 200 milliwatts into
headphones with rated impedances between 32-600Ω. 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 HC 4 produces sound pressure levels in excess of 120 dB. This level is more than adequate
for most listeners.
•
•
•
•
•
Individual Level Controls and Overload Indicators
Drives 32-600 Ω 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-
HC 4
HEADPHONE AMPLIFIER
Features and Specifications
Parameter
Specification
Limit
Units
Conditions/Comments
Headphone Impedance Range
32-600
10%
Ω
For best performance
Inputs: Type
Active Balanced/Unbalanced
………Connectors
¼" TRS
………Impedance
20k
1%
Ω
………Maximum Level
+20
1
dBu
Outputs: Type
(4) Stereo Amplifiers
………Connectors
¼" Tip = Left, Ring = Right
………Impedance
1
max.
Ω
Power
200
min.
mw
Overall Gain Range
Off to +26
±0.5
dB
LED Overload
3
min.
dB
Frequency Response
10-45 kHz
+0/-3
dB
Common Mode Rejection Ratio
40
min.
dB
20 Hz-20 kHz
THD+Noise
0.1
max.
%
re 200 mW / 150 Ω
Crosstalk, Left to Right
-50
max.
dB
re 200 mW / 150 Ω, 20 Hz-20 kHz
Signal-to-Noise Ratio
94
min.
dBr
re 200 mW / 150 Ω, 20 kHz BW
32 to 150 Ω
Before clipping
Unit: Agency Listing
………120 VAC model
………230 VAC model
Class 2 Equipment
National Electrical Code
UL
Exempt Class 2 equipment
CSA
Exempt Class 2 equipment
CE-EMC EN55020, EN55013
EMC Directive 89/336/EEC
CE-Safety EN60065
LV directive 73/23/EEC
UL
File no. E88261
CSA
File no. LR58948
CE-EMC
EMC Directive 89/336/EEC
CE-Safety
LV directive 73/23/EEC
Power Supply: Agency Listing
………120 VAC model
………230 VAC model
..........100 VAC model
Built to JIS
..........Requirement
18 VAC with Center Tap
..........Maximum Current
750
Unit: Construction
All Steel
………Size
1.75"H x 19"W x 5.3"D (1U)
(4.4 cm x 48.3 cm x 13.5 cm)
………Weight
6 lb
(2.7 kg)
Shipping: Size
4.5" x 20.3" x 13.75"
(11.4 cm x 52 cm x 35 cm)
………Weight
12 lb
(5.4 kg)
Note: 0 dBu = 0.775 Vrms
Data Sheet-
Japan only
10%
Vrms
Rane RS 1 Supplied
mA
RMS Current From Remote Supply
HC 4
HEADPHONE AMPLIFIER
HC 4 Block Diagram
LEFT
INPUT
RING
–
TIP
+
RFI
FILTER
OVERLOAD
0 dB
+26 dB
LEFT
RING
MONO
RIGHT
INPUT
RING
–
TIP
+
RFI
FILTER
TIP
HEADPHONE
LEVEL
HEADPHONE
JACK 1
0 dB
+26 dB
RIGHT
TO STAGES 2-4
Application Information
Architectural Specifications
Two balanced Inputs provide a master stereo signal to four stereo
headphone amplifiers, with individual stereo Level controls and
Overload indicators. A Stereo/Mono switch converts the stereo
Inputs to mono operation when required.
The HC 4 makes a valuable tool for any band wanting to
practice anywhere, anytime, at any volume, without disturbing
a soul. By connecting the HC 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 HC 4 is a very cost-effective alternative to renting a practice studio for every rehearsal.
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, ring-right,
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 HC 4.
Data Sheet-
HC 4
HEADPHONE AMPLIFIER
HC 4 Rear Panel
INPUTS
CONNECTION
POWER
INPUT - 1/4" PHONE JACKS, BALANCED:
SLEEVE = SHIELD, TIP = POSITIVE (+), RING = NEGATIVE (–)
LEFT
HC 4
RIGHT
RANE CORP.
1/4" PHONE JACKS, UNBALANCED:
TIP = HOT (SIGNAL), RING = GROUND, SLEEVE = GROUND
750mA
CLASS 2 EQUIPMENT
ACN 001 345 482
OUTPUT - 1/4" HEADPHONE JACKS (FRONT PANEL)
TIP = LEFT, RING = RIGHT, SLEEVE = GROUND
BALANCED / UNBALANCED
Headphone Sensitivity
As you can see from the chart below, headphones near 75 Ω
impedance produce the highest power levels from the HC 4.
However, heaphone sensitivities vary widely, and are not merely
a function of power. Note: headphones with an impedance of less
than 32 Ω are not recommended for use with the HC 4.
0.239
0.25
0.233
0.207
0.207
0.20
POWER IN WATTS
Headphone manufacturers specify a “sensitivity” rating for their
products that is very similar to loudspeaker sensitivity ratings.
For loudspeakers, the standard is to apply 1 watt and then measure the sound pressure level (SPL) at a distance of 1 meter. For
headphones, the standard is to apply 1 milliwatt (1 mW = 1/1000
of a watt) and then measure the sound pressure level at the earpiece (using a dummy head with built-in microphones). Sensitivity is then stated as the number of dB of actual sound level (SPL)
produced by the headphones with 1 mW of input; headphone
specifications commonly refer to this by the misleading term
“dB/mW.” What they really mean is dB SPL for 1 mW input.
Think about these sensitivity definitions a moment: headphone sensitivity is rated using 1/1000 of a watt; loudspeaker
sensitivity is rated using 1 watt. So a quick rule-of-thumb is that
you are going to need about 1/1000 as much power to drive your
headphones as to drive your loudspeakers since both of their sensitivity ratings are similar (around 90-110 dB SPL). For example,
if your hi-fi amp is rated at 65 watts, then you would need only
65 mW to drive comparable headphones. (Actually you need less
than 65 mW since most people don’t listen to their loudspeakers at 1 meter.) And this is exactly what you find in hi-fi receivers—their headphone jacks typically provide only 10-20 mW of
output power.
Take another moment and think about all those portable
MP3 players. They sound great, and loud. Why, you can even
hear them ten feet away as the teenage skateboarder that ran over
your foot escapes. Power output? About 12 mW.
0.10
0.146
0.146
0.15
0.089
0.089
0.05
0.00
600
300
150
75
50
32
16
8
LOAD IN Ω
HC 4 power with all channels driven simultaneously or in any combination.
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com
Data Sheet-
All features & specifications subject to change without notice. DOC 105153
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