4. DI:
Use this socket to connect your amplifier to a PA system or recording interface. It features a SOURCE switch to select
either the fully processed amp (featuring cabinet emulation) or raw guitar sound. It is fully balanced and features a level switch for
-30dB (PA/Desk level) or +4dB (Line level) for driving powered cabinets directly. A ground lift switch is also provided for lowest
noise performance.
5. AUX IN:
A 3.5mm Stereo line input for connection of a CD or MP3 player as a backing track. Control the level of the input
using the volume control on your CD/MP3 player. This input is present at the DI socket, but not at the FX send socket.
6. FX LOOP:
FX RETURN:
Mono jack socket for the connection of the output of an external FX unit. This can also be used as a slave in for
the power amp. As the FX Loop is an insert type, this will mute the preamp signal.
FX LOOP SWITCH:
Selects the FX Loop mode of operation:
-10dBu - For connection of FX units with a -10dBu nominal output level. As this is intended for devices with a lower
output level, this switch increases the gain of the FX Loop by 10dB.
0 dBu - For connection of FX units with a 0dBu nominal output level.
Bypass - Removes the FX Loop from the signal path.
FX SEND:
Mono jack socket for connection to the input of an external FX unit.
7. FOOTSWITCH SOCKET:
Connect the supplied FS4-IRT here using the supplied 5 pin DIN cable. This allows you to
remotely control the following functions: Channel, Clean, Reverb, and Boost. In order to use the footswitch functions correctly, set
Pre-Boost and Clean to ON, and Channel to Lead
8. LOUDSPEAKER CONNECTIONS:
The IRT30-112 is equipped with a 12" custom HH Acoustics 8 ohm loudspeaker
which should always be connected to the 8 ohm socket, with the impedance selector switch set to 8 ohms, when used without an
extension cabinet. When using the IRT112, or any other 8 ohm cabinet in conjunction with the internal speaker, use the 8-16 ohm
socket with the impedance selector switch set to 4 ohms. Mismatching your speaker impedance will reduce the performance of
your amplifier, and in extreme cases may damage the unit. Never operate any tube amplifier without a load connected: serious
irreparable damage may occur..
(Always switch off and disconnect the power cord when not in use)
