9
ENGLISH
Quantum
TM
-combo Manual
5. Further Connections
5.1 Fx Loop
The FX LOOP is a serial circuit, meaning that effect devices are
inserted serially into the signal path. This loop is located post TUBE
GROWL knob and pre LINE OUT. In other words, LINE OUT sends
a wet or processed signal. Note that you must set the desired dry-
to-wet balance on the effect device because in a serial loop like this,
the entire signal is patched through the effect device. The FX LOOP
is footswitchable (Hughes & Kettner
®
FS 2).
Send:
Connect this output to the input of your effects device.
Return:
Connect the output of your effects device to this input.
5.2 Line Out:
The wet (or processed) preamp signal is patched out via this un-
balanced line output. Located pre Dynavalve™ power amp, it is
independent of MASTER knob setting.
Note:
Signals sent via this output are not colored by the sound of
the Dynavalve™ power amp, so this is the output to use when you
want to route the signal to another power amp or an auxiliary rig.
5.3 Di Out:
With the speaker providing the source signal, this direct out sends
a balanced, hum-free and frequency-corrected version of the amp’s
output signal to the mixer. Because the circuit is post MASTER
knob, its signal is shaped by the reciprocal action of speakers and
power amp that are so decisive in determining the Dynavalve™
tube tone.
Note:
You may encounter feedback if you are using the DI OUT
and the PA’s sound pressure is extreme enough to excite the amp’s
speaker (for more on this, see section 7, Troubleshooting).
5.4 Tuner:
Connect a tuner to this output. This jack can also serve as an alter-
native output, for example, if you want to tap into the input signal
in front of the preamp.
Tip:
If you want to mute the amp while you are tuning, turn the
MASTER knob down or insert a dummy plug into the RETURN of
the FX LOOP without connecting an effector. Because you haven’t
actually connected an effect device, you can even mute the amp
remotely by activating the FX LOOP via footswitch.
5.5 Headphones:
Connect headphones to this jack. The Quantum™’s speaker output
is deactivated when you insert a plug into this jack.
5.6 Footswitch:
When the optional two-way footswitch (Hughes & Kettner
®
FS-2) is
connected to this port, you can switch the FX LOOP as well as
PUNCH remotely.
5.7 Speaker Out:
SPEAKER OUT A
This is a serial speaker out, meaning that external speakers are
connected serially to the internal speaker(s). The external speakers’
resistance is added to the internal speaker or speakers’ resistance of
4 ohms (8 ohms for the QC 310), so you may connect speakers with
low resistance ratings. Although increasing speaker resistance
decreases power amp output, the overall level actually increases
due to the larger speaker surface area (which also reduces power
amp wear).
SPEAKER OUT B
Unlike OUT A, the internal speaker(s) is/are switched off when
a plug is inserted into this speaker output. The amp’s full output
power of 400 watts at 4 ohms (250 watts at 8 ohms for the QC 310)
is routed to this port. This means you can connect external speakers
with a total impedance no lower than 4 ohms (8 ohms for the
QC 310) to it.
5.8 Standard Setup / Cable Connections
Quantum_Combos_Manual_1.3 29.10.2003 14:59 Uhr Seite 9
Summary of Contents for QC 310
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