Rane HC 4 Bedienungsanleitung

Manual-1

OPERATORS MANUAL

QUICK START

Conect the output from any stereo source such as a mixer or tape deck, and plug the left and right inputs into the

respective INPUT jacks. The Inputs accept balanced or unbalanced sources. Just plug them in. This source is now routed to

each of the four Outputs.

For a single mono source feeding all headphones, connect it to either one of the INPUT jacks and engage the STEREO/

MONO switch. Set the CHANNEL LEVEL controls for individual headphone levels.

Never connect anything except a Rane power supply to the thing that looks like a telephone jack on the rear of the

unit. This is an AC input and requires special attention if you do not have a power supply exactly like the one originally

packed with your unit. See the full explanation of the power supply requirements elsewhere in this manual.

WEAR PARTS: This product contains no wear parts.

HC 4

HEADPHONE AMPLIFIER

Manual-2

STEREO/MONO switch

Converts the INPUTS from stereo to

mono so that a single input cable drives

both sides of the headphones. In some

instances a STEREO program may be

confusing for live monitoring purposes,

and switching to MONO improves

intelligibility by summing the Left and

Right signals.

OVERLOAD indicators

The red LEDs light when the input

signal exceeds the HC 4’s output

capability (3 dB below maximum).

Occasional flickering is acceptable.The

overload point automatically varies with

the headphones used.

Chassis ground point

A screw is supplied for chassis

grounding purposes. This unit comes

with an outboard power supply which

does not ground the chassis through the

line cord. The HC 4 can be grounded

either to another chassis which is earth

grounded, or directly to the grounding

screw on an AC outlet cover by means

of a wire connected to this chassis

grounding screw.

Remote POWER supply input

The unit is supplied from the factory

with a Model RS 1 remote power supply

suitable for connection to this input

jack. The power requirements of the

unit call for an 18 volt AC center-tapped

transformer only. This is not a tele-

phone jack. Never use a power supply

with your unit other than the one

supplied or a replacement approved

by Rane Corporation. Using any other

type of supply may damage the unit and

void the warranty.

Manual-3

PHONE Output jacks

These stereo ¼" TRS jacks accept

standard ¼" TRS stereo headphone

plugs.

POWER switch and LED

Your basic, straightforward power switch.

When the yellow LED is lit, the HC 4 is ready

to go.

Individual LEVEL controls

These control the volume for each

set of headphones as they are driven

from the INPUTS. It’s always a good

idea to keep this control turned down

before plugging in a pair of phones,

then turn it up slowly.

INPUT jacks

These are automatic balanced/

unbalanced Inputs, which accept either

a ¼" TRS (Tip-Ring-Sleeve) plug for

balanced operation, or a ¼" TS (Tip-

Sleeve) plug for unbalanced operation.

A balanced line is best when connect-

ing a cable over 10 feet in length. You

do nothing different when hooking up

balanced or unbalanced lines. The HC 4

is one smart animal.

HC 4 CONNECTION

With the power switch in the off (out) position, plug the power cord into the

appropriate AC power source indicated on the rear panel. Locate the power supply

case away from the HC 4 and other hum sensitive equipment.

Begin with all LEVEL controls counterclockwise at “0”. Plug the outputs from

a mono or stereo source into the INPUTS.

See the Sound System Interconnection RaneNote later in this manual for more

information on proper cable wiring between devices.

Manual-4

UNDERSTANDING HEADPHONE POWER REQUIREMENTS

HEADPHONE SENSITIVITY

As you can see from the chart below, headphones near 75

ohms 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 ohms are not recommended for use

with the HC 4.

THE LIST

As an aid in finding out how much power is available

from the HC 4 Headphone Console we have compiled a

listing of popular headphones. See RaneNote 100, “Under-

standing Headphone Power Requirements,” elsewhere in this

booklet, or downloadable from Rane’s website.

HC 4 power with all Channels driven simultaneously or with any combination

MH 4 POWER

0.089

0.146

0.207

0.239 0.233

0.207

0.146

0.089

0.000

0.050

0.100

0.150

0.200

0.250

600 300 150 75 50 32 16 8

LOAD IN OHMS

POWERINWATTS

HC 4 Power

All features & specifications subject to change without notice. 105154

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