HI-GAIN SERIES
HI-GAIN 50 & 100
OPERATING INSTRUCTIONS
www.hiwatt.co.uk
Dear Guitarist,
Welcome to the Hiwatt family! Now you are part of
a team with more than 30 years of experience
building the tone of Rock n’ Roll. Your Hiwatt
Hi-Gain combines an incredible sound found in our
Custom Range Amplifiers with the flexibility of two
footswitchable channels, push-pull controls, reverb,
special designed FX Loop and much more… We
bring you total control and versatility together with
the Vintage and Modern. At last!
We hope you enjoy it!!!!!
Best wishes from all at HIWATT
Specifications
Supply Voltages: ~100V / ~120V / ~220V / ~240V
Power Consumption: 154W (HG50) / 310W (HG100)
Output Power Rating: 50Wrms (HG50) / 100Wrms (HG100)
Mains Fuse: F2.5AL250V (100 ~120V) T1.25AL250V (220 ~ 240V) (HG50)
F5AL250V (100 ~120V) F2.5AL250V (220 ~ 240V) (HG100)
HT Fuse: T1AH
Impedance: Input 1MΩ / Output 4Ω, 8Ω or 16Ω
Tubes:
PreAmp Valves
3 x 12AX7 / ECC83 (V1, V2, V3)
1 x 12AT7 / ECC81 (V4)
Power Valves
2 x EL34 (HG50)
4 x EL34 (HG100)
Pg 2
IMPORTANT SAFETY INSTRUCTIONS
Read all safety and operating instructions carefully before using switching on.
All safety and operating instructions should be retained for future reference.
Obey all cautions in the Operating Instructions and o n the back of the unit.
The amplifier should be powered by a three pin grounded (or earthed) plug connected to a
power socket with a grounded earth outlet. Never break off the ground pin on a power
supply cord.
Do not switch the amplifier on without the loudspeaker connected.
Ensure that any extension cabinets used are of the correct impedance.
It is recommended that all audio cables, with the exc eption of the speaker lead, used to
connect to the amplifier are of a high quality screened type. Always use a non-screened
speaker lead with the speaker cabinets.
The amplifier should be located so that its position does not interfere with its proper
ventilation.
The user should not attempt to service the equipment. All s ervi ce work is done by a qualified
service technician.
NEVER attempt to by-pass the fuses or fit ones of the incorrect values.
Do not attempt to remove the amplifier chassis, ther e are no user serviceable parts.
Never use an amplifier in damp or wet conditions. No obj ects filled with liquids should be
placed on the equipment.
HI-GAIN SERIES
HI-GAIN 50 & 100
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Front Panel Controls
INPUT – Jack Input for guitar.
PULL BRIGHT* – When pulled boosts the
signal on clean channel. It can be toggled from the
“High Gain” switch on the footswitch.
CH1 VOLUME – Controls the gain level for
Channel 1.
CH1/CH2 SWITCH* – Selects Channel 1 or
Channel 2. It can be toggled from the “CH1/CH2”
switch on the footswitch
CH2 GAIN – Controls the gain level for Channel
2. As the amount of gain increases so will the
distortion level in the sound.
PULL HI GAIN* – When pulled drives more the
signal on dirty channel. It can be toggled from the
“High Gain” switch on the footswitch.
BASS – Adjusts the low-frequency tone.
MIDDLE – Adjusts the mid-frequency tone
TREBLE – Adjusts the high-frequency tone.
* Controls inactive when footswitch is plugged in.
PRESENCE – Adds higher frequencies to the
guitar tone after the power stages.
CH2 LED – Indicates when CH2 Level control is
active.
CH2 LEVEL – Controls the volume level of
Channel 2.
REVERB – Controls the reverb level on both
Channels. It can be toggled from the “Reverb” switch on
the footswitch
MASTER – Adjusts the overall volume of the
amplifier.
POWER LIGHT – Indicates when the Mains
Switch is ON.
STANDBY SWITCH – Disconnects H.T. or high
voltage from the valves to allow them to attain correct
working temperature before playing. Always switch on
the Mains Switch about 2 minutes before switching on
the Standby.
MAINS SWITCH – On / Off Switch for mains
power to the amplifier.
HI-GAIN SERIES
HI-GAIN 50 & 100
Pg 4
Back Panel Controls
SEND – For connection to the input of an external
effects pedal, rack or processor. The “Loop” switch on
the footswitch allows you to bypass the external
effect.
RETURN – For connection to the output of an
external effects pedal, rack or processor.
FOOTSWITCH REVERB / LOOP – By
connecting the supplied footswitch to this jack it is
possible to turn on the Reverb and bypass or use t he
Effects Loop (Send, Return).
FOOTSWITCH CH1/CH2 / HI GAIN – By
connecting the supplied footswitch to this jack it is
possible to change between Channel 1 and Channel
2, and controls the switchs on the front panel. The
footswitch will override the front panel switchs.
EXTENSION SPEAKER – Connection for an
external speaker cabinet. This jack puts the extension
speaker in parallel with the main speaker. Check the
correct selection for the speakers on item 7.
MAIN SPEAKER – Connection for the primary
speaker (internal or external).
DO NOT OPERATE WITHOUT A LOUDSPEAKER
CONNECTED.
IMPEDANCE SELECTOR – Select the correct
impedance according to one of the possible
configurations below:
One 4 Ohm cabinet, set to 4 Ohms;
One 8 Ohm cabinet, set to 8 Ohms;
One 16 Ohm cabinet, set to 16 Ohms;
Two 8 Ohm cabinets, set to 4 Ohms;
Two 16 Ohm cabinets, set to 8 Ohms;
FAILURE FUSES – The fuse must be replaced
when the LED is ON. If the fuse blows after be replaced
try changing the output valves.
HT FUSE – Protects the DC power to the tubes
within the amplifier. Have the amplifier tested by a
qualified technician if it repeatedly blows fuses.
VOLTAGE SELECTOR/MAIN FUSE – Make
sure the specified voltage is correct for your country!
Use only the correct size and rating fuse as specified
on the panel.
MAINS PLUG – Connect the mains lead to your
power source.
HI-GAIN SERIES
HI-GAIN 50 & 100
Pg 5
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