Sennheiser SER 1-3 User Manual download pdf (Page 70)

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Stereo Headphone with "Open Qualities"

HD 230

Frequency response: 10

to 30,000 Hz.

Widespread

sound impression.

Two

-way headphones without frequency

dividing network.

Dynamic

treble system for

conveying the

highest frequencies.

Lightweight

wearing

comfort.

Ideal

screening

of ambient noises.

This

is

the

top -of- the -range headphone

among

the Sennheiser range

of enclosed

headphones.

Here a skilful

balance

has

been achieved in

producing

optimum sound quality

-

with

a

head-

phone

which is apparently

enclosed. Using these

headphones

it is

possible to extract the full sound

quality available

even

from

digital

sound carriers.

For

this purpose the HD 230

offers a

range

covering almost 12

octaves.

This

achievement

has

been rendered possible

by two technological

refinements:

In the headphone

themselves

use

is

made

of two

dynamic

systems. The wideband

system

has

been

boosted by a

tweeter system which, owing to its

small

dimensions,

is

particularly

suitable

for

transmitting the high frequencies

of 10,000 to

30,000

Hz. The transmission quality which

this

produces fulfils

all

requirements imposed

on an

enclosed headphone

in the

top quality bracket.

In addition the acoustic link between

the

front

and

rear

of the

wideband

transducer in the

enclosed

housing produces

the same audio -impression as

the open headphone, while at the

same time the

headphones

do not radiate

any sound externally.

The low weight,

relatively small contact pressure

force

and the soft, annular ear cushions impart

the

high

wearing comfort for which

the HD

230 is

noted. Anyone accustomed

to

wearing head-

phones

over

a lengthy period

of time

will know how

to value

this

feature.

The impedance of 600

Ohms

permits trouble -free connection

to

any stereo

unit.

As with all

Sennheiser

headphones,

the HD

230

is fitted with

the

interchangeable, rugged

stainless

steel connecting lead and PX 1

universal

connecting jack.

The technical data will be found in

the Summary on

pages

80

to

81.

Recommended accessories

HD

230

Connecting

lead

Connecting

chains

Headphone

connection

Stereo

control

Infrared

transmitter

Control

units

®--Th

-;

HZL 26 -4

HZK

414-17 HZA 414 HZR

26 -4

HZL 26 -7 (30

-fold

(3 -fold

HZR 26 -13

HZL 26

-3 headphone

headphone HZR

26

-17

HZL 26 -17

connecting

chain)

connector)

HZR

26

-33

HZR

26 PX

HZK

414 -17 -1

(10

-fold

headphone

connecting

chain)

70

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