Zahl EQ1 Manual - page 6

I/O DATA

Inputs

technology 

impedance

max. level

reference level

Outputs

technology 

impedance

max. level

reference level

electronically balanced,  

transformer-like behavior 

(either hot or cold may be 

connected to ground)

> 30 kOhm

> +26 dBu

+6 dBu/+4 dBu

+/- 15…17V (from stablilized, noisefree DC Supply)

< 250mA (i.e. 125mA max. per slot)

electronically balanced,  

transformer-like behavior 

(either hot or cold may be 

connected to ground)

50 ohms

> +26 dBu

+6 dBu/+4 dBu

Power

DC Voltage 

DC Current 

Connector Pin-Out

Card Edge 15 pin 0.156“ space - compatible to EDAC type 306-015-520-102

(Contact no. 01 is located at top)

01 Ground/Case

02  

Bal. Audio Output +

03  

n.c.

04  

Bal. Audio Output -

05  

Shield

06  

n.c.

07  

n.c.

08  

Bal. Audio Input -

09  

n.c.

10  

Bal. Audio Input +

11 n.c.

12  

+15…+17VDC

13  

0V / Common

14  

-15…-17VDC

15  

n.c.

EQ1 occupies two slots in the API rack.

The left card edge connector – seen from the front – 

comprehends left channel connections.  

The right connector serves for the right channel.

Supply Inputs incl. Ground/Case always have to be 

fed to both connectors even if only one channel  

is used!

!