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2.1.2 Digital I/O Section
The AES and S/PDIF lights are mutually exclusive and indicate which of the two input ports are
feeding the Stereo Digital input of your Series 300. The Locked light indicates when the digital
receiver is locked to the incoming digital audio signal.
2.1.3 Headphone
The Models 304 and 305 front panels provide access to the Headphone output and its associ-
ated level control knob as well as level control for the monitor outputs which are located on the
back of the unit.
The headphone output is a TRS 1/4” jack that provides the Left Channel on the tip, the Right
Channel on the ring and the ground return for the two channels on the sleeve.
2.2 Making Connections
Depending on model, there are four or five classes of connections you can make to the hard-
ware:
Analog Audio (Models 304 & 305)
Digital Audio
Clock Sync
FireWire
Power
Connecting your Series 300 DSP I/O Processor to outboard equipment is easy. Where applica-
ble, always use balanced interconnects with your Series 300 unit. Please make sure that power
to your Series 300 DSP I/O Processor is off while making all connections.
2.2.1 Analog Audio Connections
Whenever possible, use balanced interconnects with Series 300 models. The performance of
balanced interconnects is much higher, with far more resistant to noise interference and AC
electrical or mains wiring problems. The expense of balanced interconnects is not substantially
higher than unbalanced cabling so, if the gear that you are interfacing with supports balanced
connection,�do make use of them. If you cannot utilize balanced interconnects, there are bal-
ancing transformer or active balancing stages that you can use that will maximize perfor-
mance.
2.2.1.1 Inputs for Model 304 and 305
Connect another analog DB25 cable assembly to the “Line In 1-8.” This connection is associat-
ed with analog inputs 1-8, Analog 1-Analog 8, in soundBlade, and can be connected to the line
outputs of any +4 dBU analog device.
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