12
IRX Wallmount Amplifier/IR Receiver
Warning
No connections should be made
to the unit whilst the mains power
is connected
IRX Specifications
Rated Output:
20W RMS into 8 ohms
Frequency Response:
100Hz ~ 18kHz ±3dB
THD (At 1kHz):
Better than 0.1% at rated output
Tone Controls:
Low 1kH ±12dB, High 10kHz ±12dB
Line Input:
500mv, 600 ohms balanced
18V Output:
18V DC, fused at 100mA
15V Output:
15V DC, fused at 500mA
Line Output:
750mv, 600 ohms balanced
Power Consumption:
35W max
Power Input:
230V AC 50Hz via IEC socket
Case:
Grey painted steel
Weight: 4.5
kg
Dimensions:
325(H) x 224(W) x 85(D) mm
For Connection Details:
(refer also to Diagram 4 opposite)
• Line In:
Balanced line level input terminals for connection
of up to
fi
ve remote Outreach input plates (APA/APL
etc).
• 18v DC Out (Line Level/Line Sig Out):
18v DC supply terminals providing power to the
Outreach plates. These terminals will provide a
combined maximum output current of 100mA.
• 15v DC Out:
15v DC supply terminals will provide a combined
maximum output current of 500mA and can be used
to power a HC-33 Charger.
• Line Output:
Balanced line level output terminals for connection to
the line level input of other equipment such as the
APA/LLO output plate or Loop ampli
fi
ers.
• Ext Spkr:
External Speaker terminals for powering up to 4 FBT
Project 315 loudspeakers set at low impedance.
Important note: the speakers need to be wired
in series parallel (see diagram 4).
Damage to the
ampli
fi
er will occur if speakers with a total impedance of
less than 4 ohms are connected to these terminals.
The IRX unit is a wallmount system featuring 20W ampli
fi
er and in-built infrared
receiver, developed speci
fi
cally for Sound
fi
eld systems using conventional
wallmount loudspeakers or the i-ceilings CS4500 surface-mount Sound Panel.
It has been designed to be both user-friendly in the classroom, whilst ensuring
complete safety and security in such a welfare-critical environment.
The in-built ampli
fi
er features two inputs; one is at line level allowing the use of
remote Outreach input plates such as the APA/APL, the other input controls the
level of the internal infrared microphone receiver. An 18v DC supply is available
from the ampli
fi
er to drive the Outreach plates. Both inputs have their own level
control.
The ampli
fi
er also includes low impedance loudspeaker output (minimum
impedance 4ohms) and a separate line level output and 18v DC supply for use
with optional APA/LLO output plate.
The IRX is
fi
tted with high and low tone controls to allow adjustment of the frequency
response of the speakers. Frequencies at which the controls operate have been
chosen to allow speech clarity to be optimised to the acoustic environment.
All signal connections to the unit are accessible only when the front cover is removed and are of the removable
screw terminal type allowing for quick and easy connection.
