AKG Acoustics Microphone D 770 User Manual

D 770  
Dynamic Microphone  
Description  
The AKG Model D 770 is a rugged dynamic cardioid  
microphone intended for on-stage vocal and instrumental  
pickup. Its cardioid pattern is uniform with frequency, and  
response has been boosted at mid and high frequencies for  
crisp instrumental pickup and improved speech intelligibility.  
The microphone has a heavy duty, dent resistant spring-steel  
windscreen with an integral pop filter for effective  
suppression of breath noise. The microphone incorporates  
two important AKG developments: In the “Tiefzieh”  
Varimotion System™ the diaphragm thickness varies from  
20 microns at the edge to 40 microns at the center. This  
distribution of mass produces extended bass response,  
virtually eliminating the need for a tuning resonator. In  
addition, the Doubleflex™ mounting system used with the  
capsule assembly places the primary resonance of the  
moving system to well below the audible range, resulting in  
excellent isolation of handling and cable induced noises. The  
light-weight body is die cast zinc alloy and has a dark matte  
finish for minimum reflection and glare.  
Specifications  
Transducer type:  
Dynamic pressure gradient  
Frequency response: 60 - 20 kHz (20 - 20 kHz @ 1 cm)  
Polar pattern:  
Impedance:  
Cardioid  
Features  
<600 ohms  
Recommended load impedance: >2000 ohms  
• Response tailored for vocal and  
instrumental on-stage performance  
Output connector:  
Sensitivity:  
XLR-M  
2.5 mV/Pa; -75 dB (re 1 V/Pa)  
• Frequency independent cardioid  
pattern for added immunity to  
feedback  
Sound pressure level for 1% (3%) THD:  
147 dB SPL (156 dB SPL)  
Size:  
Maximum diameter: 2 in. (50 mm)  
7.1 in. length (180 mm)  
Very low handling noise through  
use of AKG’s Doubleflex™ anti-  
vibration isolation system  
• High sensitivity (2.5 mV/Pa)  
resulting from use of high-energy  
neodymium-iron-boron magnet  
Net weight:  
10.4 oz. (295 g)  
1.3 lbs. (600 g)  
Shipping weight:  
Accessories included: SA 44 Stand adapter  
Mic bag, blue nylon with rugged zipper  
Optional accessories: SA 26, SA 41/1 Stand adapter  
ST 305 Table stands  
W 23 Foam windscreen  
• Light-weight die cast metal body  
with dark matte finish  
• Spring-steel dent resistant  
windscreen  
 

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