Sennheiser Headphones 4974 User Guide

HD 280  
-silver  
-pro  
-13  
Instruction Manual  
 
Headphone features  
HD 280 pro / HD 280 silver headphones  
y Closed dynamic headphones  
y Accurate, linear sound reproduction for critical monitoring  
applications  
y Low impedance headphones (64 Ω impedance)  
y Space-saving design features collapsible, rotating earcups  
y Up to 32 dB of ambient noise attenuation  
y Neodymium magnets for high maximum SPL  
(113 dB/1 V  
)
rms  
y Very comfortable, even if used for long periods due to  
y very light weight  
y soft, circum-aural ear cushions  
y padded, adjustable headband  
y Single-sided, coiled cable with 3.5 mm jack plug and lockable  
adapter to 1/4“ (6.3 mm) jack plug  
y Very rugged with user-replaceable parts  
HD 280 -13 headphones  
As HD 280 PRO, but high impedance variant (300 Ω  
impedance).  
2
 
Areas of application  
The headphones not only effectively attenuate external noise  
but also minimise spillage from the headphones to the outside  
world. They are especially suitable for  
y use as monitoring headphones in a noisy environment  
y broadcast and TV applications  
y film and theatre applications  
y recording applications  
Delivery includes  
y Headphones  
y Adapter to 1/4“ (6.3 mm) jack plug  
y Instructions for use  
3
 
Safety instructions  
Attention! High volume!  
This is a professional pair of headphones. Commercial use is  
subject to the rules and regulations of the trade association  
responsible. Sennheiser, as the manufacturer, is therefore  
obliged to expressly point out possible health risks arising from  
use.  
This system is capable of producing sound pressure exceeding  
85 dB(A). 85 dB(A) is the sound pressure corresponding to the  
maximum permissible volume which is by law (in some  
countries) allowed to affect your hearing for the duration of a  
working day. It is used as a basis according to the specifications  
of industrial medicine. Higher volumes or longer durations can  
damage your hearing. At higher volumes, the duration must be  
shortened in order to prevent damage.  
The following are sure signs that you have been subjected to  
excessive noise for too long a time:  
y You can hear ringing or whistling noise in your ears!  
y You have the impression (even for a short time only) that  
you can no longer hear high frequencies!  
4
 
Adjusting the headband  
For good transmission quality and best possible comfort, the  
headband has to be adjusted to properly fit your head. To do  
so, adjust the headband via its snap-in locking mechanism.  
5
 
Folding up the headphones  
For space-saving transportation, the headphones can be folded  
up in three different ways:  
1. To fold up the headphones as compact as possible, tuck the  
earcups between the headband (variant A and B).  
A
Note:  
To fold up the headphones as shown in variant B, pull out  
the headband completely.  
B
2. To fold up the headphones as flat as possible, the earcups  
can be rotated by 90°.  
Cleaning the headphones  
To clean the headphones, use a soft, damp cloth. If necessary,  
the headphones can be cleaned with soapy water (use a mild  
cleanser such as washing-up liquid).  
Note:  
Never use solvent-containing cleansers.  
6
 
Replacing spare parts  
Available accessories and spare parts  
y Ear cushions  
y Headband padding  
y Connecting cable  
Replacing the ear cushions  
̈ Grasp behind the ear cushions and pull them up and away  
from the earcups. Slide the new ear cushions onto the  
earcups.  
Replacing the headband padding  
̈ Pull the Ziploc type fastening strips of the headband  
padding apart, as shown in the diagram on the left, and  
remove the worn headband padding.  
̈ Put the new headband padding around the headband.  
̈ Pull the two edges of the headband padding together so  
that the fastening strips slightly overlap.  
̈ Join the fastening strips.  
7
 
Replacing the connecting cable  
Replace the connecting cable if it is damaged. To do so, please  
proceed as follows:  
̈ Remove the ear cushion. Grasp behind the ear cushion and  
pull it up and away from the earcup.  
̈ Loosen the screw and remove it.  
̈ Remove the cover from the earcup .  
̈ Pull the connector out of the socket.  
̈ Remove the antikink protection of the connecting cable  
from the holding device .  
̈ Insert the antikink protection of the new connecting cable  
into the holding device.  
̈ Plug the connector of the new connecting cable into the  
socket as shown in the diagram on the left.  
̈ Put the cover back onto the earcup .  
̈ Replace the screw and tighten it.  
̈ Slide the ear cushion onto the earcup.  
Converting the headphones into a headset  
If you wish to convert your headphones into a headset, please  
contact your Sennheiser service partner who will equip the  
headphones with a microphone.  
8
 
Specifications  
HD 280 pro  
HD 280-13  
HD 280 silver  
Classification  
268-7-IEC-DCSC-64R0-2  
268-7-IEC-DCSC-03R2-2  
(as per IEC 268-7)  
Transducer principle  
Impedance  
dynamic  
dynamic  
64 Ω (as per IEC 268-7)  
300 Ω (as per IEC 268-7)  
0.5 W (as per IEC 268-7)  
circum-aural  
Long-term max. input power 0.5 W (as per IEC 268-7)  
Ear coupling  
circum-aural  
Frequency response  
8 Hz – 25 kHz  
8 Hz – 25 kHz  
(–10 dB referred to 1 kHz)  
Sound pressure level  
102 dB (as per IEC 268-7)  
102 dB (as per IEC 268-7)  
113 dB / 1 V  
107 dB / 1 V  
rms  
rms  
Ambient noise attenuation max. 32 dB  
max. 32 dB  
THD  
< 0.1 % (at 51 kHz, 100 dB SPL) < 0.1 % (at 1 kHz, 100 dB SPL)  
Weight  
approx. 285 g  
approx. 6 N  
approx. 285 g  
approx. 6 N  
Contact pressure  
Length of coiled cable  
min. 1 m  
max. 3 m  
min. 1 m  
max. 3 m  
9
 
Frequency response curve  
Diffuse field frequency response  
dB  
(1Pa/V)  
Hz  
10  
 
Manufacturer declarations  
Warranty  
2 years  
Approval  
Sennheiser electronic GmbH & Co. KG declare that this device is  
in compliance with the applicable CE standards and  
regulations.  
Before putting the device into operation, please observe the  
respective country-specific regulations!  
WEEE Declaration  
Please dispose of this product at the end of its operational  
lifetime by bringing it to your local collection point or recycling  
centre for such equipment.  
11  
 
Sennheiser electronic GmbH & Co. KG  
30900 Wedemark, Germany  
Phone +49 (5130) 600 0  
Fax +49 (5130) 600 300  
Printed in Germany  
Publ. 06/06  
086082  
 

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