AKG Acoustics Headphones C 420 User Manual

C 420  
Bedienungshinweise. . . . . . . S. 2  
User Instructions . . . . . . . . . p. 12  
Mode d’emploi . . . . . . . . . . . p. 22  
Istruzioni d’uso. . . . . . . . . . . p. 32  
Modo de empleo . . . . . . . . . p. 42  
Instruções de uso . . . . . . . . p. 52  
Bitte vor Inbetriebnahme des Gerätes lesen!  
Please read the manual before using the equipment!  
Veuillez lire cette notice avant d’utiliser le système!  
Prima di utilizzare l’apparecchio, leggere il manuale!  
Antes de utilizar el equipo, lea por favor el manual!  
Por favor leia este manual antes de usar o equipamento!  
 
1 Description  
All C 420 versions are supplied with:  
W 44 foam windscreen  
1.3 Standard  
Accessories  
B 18 battery supply 1.4 Optional  
N 62 E, N 66 E AC power Accessories for  
supplies C 420  
MK 9/10 10-m (33-ft.)  
connecting cable  
1.5 Optional  
B 29 battery supply Accessories for  
MPA II phantom power adapter C 420 L,  
C 420 B/lock  
2 Interfacing  
The C 420 is a condenser microphone and there-  
fore needs a power supply.  
1. Connect the phantom power adapter on the 2.1 C 420  
microphone cable to a balanced XLR micro-  
phone input with phantom power.  
2. Switch the phantom power on. (Refer to the  
instruction manual of the unit to which you  
connected your C 420.)  
3. If your mixer provides no phantom power,  
connect an AKG phantom power supply  
(N 62 E, N 66 E, B 18) between the microphone  
and the mixer.  
You may connect AKG phantom power sup-  
plies to balanced or unbalanced inputs.  
 
13  
2 Interfacing  
2.2 C 420 L 1. Plug the mini XLR connector on the micro-  
phone cable all the way into one of the two mini  
XLR sockets on the B 29, the mini XLR socket  
on the connecting cable of the MPA II, or the  
input socket on the bodypack transmitter.  
The connector will lock automatically.  
2. Connect the B 29 or MPA II to the desired  
input.  
2.3 C 420 B/lock This version is identical to the C 420 L except that  
it uses a screw-in mini jack plug that you can  
connect directly to the old versions of the B 29,  
MPA II, or AKG bodypack transmitters. (Refer to  
the instruction manual of the unit you are using.)  
2.4 B 29 Battery The optional B 29 battery supply allows you to  
Supply connect two microphones to a common balanced  
or unbalanced input in order to save on mixer  
inputs.  
2.5 MPA II The optional MPA II phantom power adapter lets  
Phantom Power you connect the C 420 to any phantom power  
Adapter source or XLR input with 9 to 52 V phantom power.  
2.6 External For phantom powering the C 420 L and C 420  
Phantom Power B/lock with MPA II we recommend the optional  
Supplies N 62 E or N 66 E AC power supply or the B 18 bat-  
tery supply (also optional) from AKG.  
Important! Using any power supply other than those  
recommended by AKG may damage your  
microphone and will void the warranty.  
 
14  
2 Interfacing  
To connect to a balanced (XLR) input, use a 2.7 Connecting  
standard XLR cable.  
Cables  
To connect to an unbalanced input (mono jack),  
use a cable with a female XLR connector and  
TS jack plug (see fig. 1 below):  
1. On the XLR connector, use a wire bridge to  
connect pin 1 to pin 3 and the cable shield.  
2. Connect the inside wire of the cable to pin 2 on  
the XLR connector and the tip contact of the  
jack plug.  
Fig. 1: Connecting cable for unbalanced micro-  
phone inputs.  
 
15  
3 Operating Notes  
3.1 Putting the 1. Adjust the temple pieces so that the behind-  
Microphone on  
the-neck headband will rest securely against  
your head.  
Fig. 2: Adjusting the temple pieces.  
2. Put the behind-the-neck headband on as  
shown in figs. 3 through 5.  
Fig. 3: Behind-the-  
neck headband.  
Fig. 4  
Fig. 5  
 
16  
3 Operating Notes  
Readjusting the  
Temple Pieces:  
Fig. 6  
Fig. 7  
3. If the behind-the-neck headband does not fit  
snugly, readjust the temple pieces as shown in  
fig. 6. Slide the cable holder so as to slacken  
the cable a little (refer to fig. 7).  
4. Should the micro-  
phone still fit loo-  
sely,  
bend  
the  
behind-the-neck  
headband slightly  
inward referring to  
fig. 8.  
Fig. 8:  
5. Bend the gooseneck so that the microphone Aligning the  
will sit to one side in front of the corner of your Microphone:  
mouth.  
6. Reeve the microphone cable through the three Strain Relief:  
slots in the cable clip and clamp the cable clip  
on your shirt collar. This takes the pull of the  
cable off the microphone and the microphone  
will fit your head securely and lightly.  
 
17  
3 Operating Notes  
3.2 Windscreen If (for instance, in outdoor use) excessive wind or  
pop noise becomes audible, attach the supplied  
windscreen to the microphone.  
1. Slide the windscreen onto the microphone  
capsule.  
2. Pull the windscreen over the outer edge of the  
microphone capsule.  
4 Specifications  
4.1 Microphone  
Type:  
Pre-polarized condenser microphone  
Cardioid  
Polar pattern:  
Frequency range:  
Sensitivity:  
20 Hz to 20,000 Hz  
5 mV/Pa (-46 dBV re 1 V/Pa)  
Electrical Impedance at 1000 Hz: 200  
Recommended load impedance:  
Max. SPL for 1% / 3% THD:  
Equivalent noise level:  
>2000 Ω  
126 dB / 130 dB  
33 dB (to DIN 45412)  
Supply voltage:  
C 420:  
C 420 L:  
9 to 52 V universal phantom power  
9 V battery supply through B 29 or body-  
pack transmitter, or 9 to 52 V universal  
phantom power through MPA II adapter  
9 V battery supply through B 29 or 9 to  
52 V universal phantom power through  
MPA II adapter  
C 420 B/lock:  
Current consumption:  
Connector:  
Finish:  
Approx. 2 mA  
3-pin male XLR  
Matte black  
Size:  
130 mm (5.2 in.) in dia.  
3 m (10 ft.)  
Cable length:  
Net weight:  
30 g (1.1 oz.) exc. of connector  
 
18  
4 Specifications  
When connected to equipment with a CE sign, this 4.2 Declaration  
product conforms to EN 50 082-1.  
of Conformity  
4.4 Polar  
Diagram  
4.3 Frequency Response  
5 Cleaning  
Clean metal surfaces with (industrial grade)  
methylated spirits or alcohol.  
Clean the foam windscreen in mild soap suds. You  
can use the windscreen again as soon as it has  
dried.  
 
19  
6 Troubleshooting  
Problem  
Possible Cause  
Remedy  
1. Microphone does No supply voltage.  
C 420: Check phan-  
tom power source.  
C 420 B/lock: Check  
batteries in the  
not work:  
B 29 or PT 300.  
C 420 L: Check bat-  
teries in the body-  
pack transmitter.  
2. Headset does not Headband is not ad- Adjust headband  
fit securely;  
microphone arm  
wobbles:  
justed correctly.  
exactly as described in  
section 3.1, referring  
particularly to fig. 9.  
3. Loud pop, wind,  
and/or breath  
noise:  
Microphone sits too  
close to mouth or  
nose.  
Align microphone  
sound entry with  
corner of mouth and  
move microphone just  
far enough away from  
mouth and nose to  
stop breath noise.  
4. Microphone  
sound becomes  
Internal or W 44  
external windscreen  
1. Clean W 44 wind-  
screen with soap  
suds.  
duller by and by: when soiled  
attenuates high fre-  
quencies.  
2. Refer cleaning of  
internal windscreen  
to nearest AKG  
Service Center.  
ATTENTION: Do not  
open microphone  
case yourself. This  
would void the war-  
ranty.  
 
20  
6 Troubleshooting  
Problem  
Possible Cause  
Microphone sits too  
Remedy  
5. Microphone  
sounds “thin”,  
Move microphone  
far away from mouth closer to corner of  
feedback sets in or nose.  
at low levels:  
mouth.  
 
21  
 

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