Operation Manual
I-Tech HD DriveCore Series Power Ampliers
page 16
H. Preset Indicator 
LED flashes to signal the number of the current preset if active. 
LED is green if the preset values have not been changed once 
loaded. LED is yellow if the preset values have been changed 
since they were loaded. 
I. Reset Button 
To restore factory default settings: Press the Reset Button with a 
thin, non-conductive object, then turn on amplifier power, and 
continue to hold the reset button  until the Preset light comes 
on green (approximately 16 seconds)..
J. Data Indicator 
Flashes yellow only when the amplifier is polled for data, or is 
polled to see whether it is online. 
DIGITAL INPUTS SECTION
K. AES/EBU Digital Input 
This 3-pin female XLR connector accepts a dig ital signal in the 
AES/EBU format.
6 Operation
Figure 6.2  Back Panel Controls and Connectors
6.5 Back Panel Controls, Indica tors 
and Connectors 
A. Fans 
Provide front-to-back forced airflow for cooling.
ANALOG INPUTS SECTION
B. Balanced Analog XLR Inputs 
A 3-pin female XLR connector for each channel. 
OUTPUTS SECTION
C. Speakon
®
 Output Connectors 
Two high-current, 50A Neutrik
®
 Speakon
®
 NL4MLP 
(mates with NL4FC and NL4), for channels 1+2 or 
3+4 and one NLT8 for channels 1 thru 4. Class 2 
output wiring required.
These two connectors accept 2-pole or 4-pole 
Speakon
®
 connectors. See Figures 2.5 through 2.10 
and Tables 1, 2 and 3 for connector wiring.  The top 2 
speakon connectors are wired each for stereo 
operation off of one connector, the bottom NL8 
speakon connection is for four way operation off 
of one connector.
D. Binding Post Output Jacks 
One pair per channel of high-current, 60A 
color-coded binding posts. Accepts banana 
plugs, wire or spade lugs. 
E. Power Cord Connector 
32 amp PowerCon
®
 AC Inlet. Voltage range is 
indicated above IEC inlet.
F. Reset Switch/Circuit Breaker 
If the current draw of the amplifier exceeds safe 
limits, this breaker automatically disconnects 
the power supply from the AC mains. The switch 
resets the circuit breaker.
G. MAC Address 
This specific amplifier’s network identifier that is 
burned into its firmware.
It is not recommended to loop through more than four 
amplifiers. If larger distribution of AES is needed, the use of 
an AES distribution ampli fier is recommended.
NETWORKING SECTION
L. Link/Act Indicator 
Shows net work activity.The LINK ACT LED illuminates when 
the network port is connected and flashes when network 
activity is detected. 
M. Network Connector 
This EtherCon
®
 Ethernet connector is for networking. 
Warning: Only connect to networks that remain inside the 
building.
N. Cond Indicator 
Turns on if the amplifier is set to be the CobraNet conductor. 
The CobraNet conductor is a CobraNet node that provides 
the master timing clock for the CobraNet digital audio 
transport network.
ANALOG
INPUTS
CH1 CH2CH3 CH4
CH
3/4
CH
1/2
DIGITAL INPUT AES3
NETWORK
COND.
DATA PRESET
LINK/
ACT.
I-TECH 4x3500 | 2300W
ASSEMBLED  IN USA
CAUTION – TO REDUCE THE RISK
OF ELECTRIC SHOCK, GROUNDING
MUST BE MAINTAINED.
OUTPUTS
CH1CH2
DUAL
BRIDGE
DUAL
CH3CH4
BRIDGE
DUAL DUAL
REG. U.S. PAT. OFF. 5,657,219    6,504,348    6,909,321
7,283,379    7,557,622   7, 919,998   7, 778,324   7,521, 936
CLASS 2 OUTPUT WIRING