1. Mode Select
To access the Lead channel - both front panel ‘mode select’
pushswitches must be pushed in (with or without the foot controller
connected). If using the foot controller press the Lead switch. The Lead
LED (red) on the front panel and on the foot controller will now be
illuminated.
FUNCTIONS
As you can see the control line up in the ‘Lead’ mode is identical to the
‘Crunch’ mode, except now you are using the other row of controls.
Operation of the ‘Lead’ channel is exactly the same as the ‘Crunch’
channel, but with a lot more gain and compression to play with. This
channel will still clean up with low gain settings or from the guitar’s
volume control. BUT, when wound up the dynamics and response of
this channel will follow your every move. When speed picking the amp
will follow every note without blurring and when playing slow legato
runs, the amazing sustain will bloom into controlled feedback hanging
on for as long as you want. Experimenting with the Gain, Volume and
EQ controls will yield an extremely wide palette of tonal textures.
OTHER FRONT PANEL CONTROLS
In the section marked ‘POWER AMP’ there are two pushswitches, one
marked ‘V.P.R.’ and the other marked ‘Output Mute’, these work in the
following way:
V.P.R. - Virtual Power Reduction
When this switch is depressed, the power amp circuit is modified
allowing it to emulate a lower powered amp, approximately 25 watts.
This is done between the phase splitter (inverter) valve and the output
valves. In this way, as compared to other methods of power reduction,
all four output valves remain running and connected in pentode
operation, thereby all valves wear evenly and maintain the full toneful
dynamics of that type of connection.
Output Mute
By the nature of the ‘V.P.R.’ circuit, we can now turn off the signal to
the output valves. As the speaker emulating DI output is connected to
the same place, this enables the TSL to be DI’d for silent recording, yet
maintain the compression and harmonics of a push-pull valve stage.
Power and Standby Switches
These are a very important part of your valve amplifier and to help
maximise the life of your output valves. Please remember these simple
but important rules :
1. Always turn the Power switch on first, wait for at least a minute, 2 if
possible. This enables the valves to reach their working temperature
before the HT voltage is applied.
2. Then turn on the Standby switch. This applies the HT voltage to the
valves and makes the amp work.
3. When stopping for a break, turn Standby switch off only. This allows
the valves to remain at their working temperature (where they are
happiest !) and you do not need to go through the warm up cycle again
when you are ready to resume playing.
4. At the end of the gig turn the Standby switch off first, wait a few
seconds and then turn the Power switch off.
Another important rule to remember, to help prolong valve and amplifier
life is after turning off at the end of a gig, let your amp cool down before
moving it and certainly before putting into the back of the truck on a cold
night. Remember this and your valves (tubes) will love you for it.
LEAD CHANNEL
(please refer to diagram C, Page 8)
TSL100 & TSL122 REAR PANEL
(refer to diagram D, Page 9)
The TSL rear panel contains a number of functions to not only make the
amp work but also to expand its versatility.
1. Footswitch Connector
The supplied foot controller is connected to the amplifier via this 6 pin
DIN socket to allow remote switching of Channels, Reverb and FX
functions. See section on 5 way foot controller for details.
2. Effects Loop A & Effects Loop B
The TSL supports two effects loops, which can be used in a variety of
ways.
Loop A when used on its own, is the master loop for the amp and will
channel switch from clean to overdrive when you change channels,
allowing you to set the individual mix from the front panel Mix controls.
Loop B is the specific loop for using effects on the overdrive channels
(Crunch / Lead) and if used on its own will only provide effects when on
these channels, leaving the clean channel totally dry.
When Loop B is in use Loop A becomes available for use solely on the
Clean channel. This means that you can have two totally different FX
systems, one for clean and one for overdrive.
Each loop has its own ‘loop level’ pushswitch, enabling you to select the
right send and return levels to suit whatever effects system you are using.
With the switch ‘out’, the level within the loop is high (suitable for most
pro rack fx). With the switch ‘in’, the level within the loop is set at a
much lower signal level (suitable more for floor pedals or lesser spec’d
rack units).
Note: The loops are in parallel mode until the mix controls are at 10
when the loop converts to series mode. Also, remember that as the loops
are between the preamp and the power amp, this is NOT the place for
distortion type effects units.
3 & 4. Loudspeaker Outputs & Impedence Select
There are three loudspeaker jacks provided on the TSL amps. One is
dedicated to 16 Ohm use only and is marked as such. This is for use
when using either a single 16 Ohm cabinet (Marshall 4x12” of course!)
on the TSL100 head or the internal speakers on the TSL122 combo.
Using this socket negates the use of the other sockets! The other two
sockets are marked 4 & 8 Ohm Parallel Jacks and are connected to the 4
& 8 Ohm Impedance selector. These are used when using either non-
Marshall cabinets of a different impedance (either 4 or 8 ohms) or when
using multiple speaker systems (i.e. when using two stacked Marshall
4x12” cabs or when using an extension cab with the TSL122 combo).
Remember to set the Output Selector to the appropriate setting! (item 4)
i.e. 2 x 16 Ohm loads = 8 Ohms, 1 x 4 Ohms = 4 Ohms, 2 x 8 Ohms = 4
Ohms. If in doubt consult your Marshall dealer.
WARNING! - Under no conditions operate your TSL amplifier without a
loudspeaker type load connected, otherwise costly damage may result!
You may notice that the TSL122 2x12” combo has two different types of
loudspeaker (1 x Marshall Celestion Vintage and 1 x Marshall Celestion
Heritage), this is because combining the characteristics of the two
speakers helps reproduce the unique tone capabilities of this amp. We
care about your tone!
To further extend the TSL122 combo’s capabilites there is a matching
2 x 12” cabinet - the TSLC212. This cabinet is the perfect match for the
combo as it features a similar speaker configuration.
5. Emulated Line Out
This XLR connector provides a superb loudspeaker emulated output
signal, suitable for either connecting into a PA system or for direct
recording, without resorting to using microphones or external DI units.
As stated earlier, by using the “output mute” function, silent recording
can be accomplished, enabling late night project studio sessions to be
carried out with the minimum of stress. This socket can be connected in
a variety of ways. See diagram E.
6. Mains Input, Mains Fuse, HT Fuse
The mains input and fuse provide and protect your amplifier with the
incoming electric power, enabling it to operate. Please see specifications
(and amplifier rating) for more details. If in doubt consult your Marshall
dealer. The HT fuse protects your amplifier from an internal fault with
the HT voltage supply. If this blows, it would probably indicate that an
output valve has failed. If this happens, consult your Marshall dealer or
service centre, regarding replacement and service.
WARNING! For your protection and safety, your amplifier must be
serviced by qualified personnel only.
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