Thank you for purchasing the Ibanez TB50R guitar amplifier. Read
ENGLISH
this manual thoroughly prior to using your amplifier in order to get the
most out of the functions available. Then keep the manual in a safe
place.
About Footswitches
The TB50R amplifier provides two footswitch jacks, and comes with
one IFS2 dual footswitch included. If using only one footswitch, you
can connect it to either jack (FOOT SW1 or FOOT SW2). If you wish to
use two footswitches together, you may purchase another IFS2
footswitch from your dealer, or you may connect up a latch-type stereo footswitch.
Features
The TB50R amplifier head provides 50 W of output and is mounted
with a powerful 12-inch Ibanez original Power Jam speaker to provide
high-quality sound and easy operation.
The pre-amp is equipped with independent clean and overdrive channels that produce two completely different types of sound. The clean
channel provides a clean, crunchy sound through all registers from
low to high. The overdrive channel provides a piercing, smooth and
powerful distortion sound. It is also fitted with an active EQ that provides a larger variable width than the normal passive EQ function to
produce a much wider sound. It is also equipped with built-in spring
reverberation functions to add depth to the sound.
Precautions during use
• Do not subject the amplifier to shocks by dropping, etc., or treat it
roughly in any way.
• Place the amplifier carefully in a stable position. The sound from the
amplifier will vary depending on how and where it is set up.
• Ensure that the power supply has been switched off when not in use.
Also, remove the power cord from the power supply socket when the
amplifier is not to be used for an extended period of time.
• Do not use or store the amplifier in locations where it is subject to
direct sunlight or in environments that experience extreme temperatures and humidity levels.
• Reduce the volume to ’0’ or switch off the power supply when con-
necting the guitar shielded cable and the effects or other cables required for external connection. Note that the noise generated when
plugs are inserted and removed may cause severe damage to the
equipment.
Names and functions for each part
1. INPUT jack
The input terminal for standard 1/4” jacks. Make the connection from the electric
guitar with a shielded cable intended for guitars.
2. BOOST switch
The boost switch works with both the clean channel and the overdrive channel.
When the switch is turned on, the yellow indicator lamp lights up.
1) When the BOOST switch is used with the clean channel and the GAIN control is set low, the volume increases. When the GAIN control is set high, as
the volume increases a natural distortion is produced. By adjusting the VOLUME control at the same time, you can set the switching to your preference.
2) With the overdrive channel, when the BOOST switch is turned on, the volume level increases. The switch can also be operated using a latch-type foot
switch. When a foot switch is plugged into the FOOT SW1 jack on the back
panel, it overrides the BOOST switch.
3. GAIN control
This adjusts the clean channel gain level. When the BOOST switch is on, turning up the GAIN control produces a natural distortion and a crunchy sound is
obtained. At the same time, the sound volume increases.
6
4. BASS control
The low-range sound area equalizer. It is possible to boost or cut the 100 Hz
band by ±17 dB.
5. MIDDLE control
The mid-range sound area equalizer. It is possible to boost or cut the 1 kHz
band by ±12 dB.
6. TREBLE control
A shelving-type equalizer for the high-range sound area. It is possible to boost
or cut the band of 1.8 kHz or higher by ±17 dB.
7. VOLUME control
This adjusts the volume level for the clean channel.
8. CHANNEL switch
This switches between the clean channel and the overdrive channel. The green
LED indicator lights up when the clean channel is selected, and the red one
lights up when the overdrive channel is selected.
As an alternative to the CHANNEL switch, you can use a footswitch connected
to the FOOT SW1 jack to switch the channels. (Connecting the footswitch to
FOOT SW1 disables the CHANNEL switch.)
9. GAIN control
It is possible to adjust the gain when using the overdrive channel (level of overdrive distortion.) The amount of distortion will be reduced to produce a clear and
individual sound when the control is lowered. As it is raised, the amount of
distortion increases, as does the sustain level.
10. BASS control
The low-range sound area equalizer. It is possible to boost or cut the 100 Hz band
by ±12 dB.
11. MIDDLE control & MID SHIFT pull switch
Controls the mid-band equalizer. The MIDDLE control cuts the center level by
up to –20 dB. The pull switch sets the band’s center frequency to either 1 kHz or
600 Hz, so that you can change the setting on the fly. As an alternative to the
pull switch, you can use a footswitch connected to the FOOT SW2 jack to change
the frequency. (The pull switch is disabled if a footswitch is connected to FOOT
SW2.)
12. TREBLE control
A shelving-type equalizer for the high-range sound area. It is possible to boost
or cut the band of 1.8 kHz or higher by ±12 dB.
13. VOLUME control
Adjusts the volume of the overdrive channel. (Note that setting the BOOST switch
to ON will boost the volume by 6 dB, approximately doubling it.)
14. REVERB LEVEL control
Adjusts the reverb level. Note that if you connect the IFS2 footswitch to the
FOOT SW2 jack, you can use it to toggle the reverb effect ON and OFF. (This
REVERB On/Off toggle feature is available only with the footswitch. There is no
corresponding switch on the main panel.)
15. HEADPHONES jack
This is a 1/4” output jack for stereo headphones. The sound is not reproduced
through the built-in speakers when headphones are in use.
Warning
The headphone output produces a large volume of sound. Ensure that the volume has been turned down before beginning to play using the headphones, and
then slowly increase the volume until it has reached the desired level. Note that
the noise and distorted sound signals produced when inserting or removing the
plug at high volume levels will not only result in damage to the headphones, it
may also result in damage to the user’s hearing.
16. POWER switch
The switch to turn the power supply on and off. Ensure that this switch is set at
OFF when the amplifier is not in use.
17. EFFECTS LOOP SEND jack
Use this jack when connecting the amplifier to compact effects units. The jack
outputs at –10 dB (not counting EQ). Connect to the input jack on the effects
unit, using a shielded cable with 1/4" plugs.
18. EFFECTS LOOP RETURN jack
Use this jack when connecting the amplifier to compact effects units. This is a
20 kΩ input jack designed for –10 dB input (not counting EQ). Connect to the
output jack on the effects unit, using a shielded cable with 1/4" plugs.
19. FOOT SW1 jack
When connected to this jack, the IFS2 footswitch operates as a BOOST on/off
switch and a clean/overdrive channel switch.
20. FOOT SW2 jack
When connected to this jack, the IFS2 footswitch acts as a reverb on/off switch
and as the Mid Shift switch (middle frequency switch) for the overdrive channel.
**Use a latch-type two-channel foot switch. The TB50R amplifier provides two
footswitch jacks, and comes with one IFS2 dual footswitch included. If using
only one footswitch, you can connect it to either jack (FOOT SW1 or FOOT
SW2). If you wish to use two footswitches together, you may purchase another
IFS2 footswitch from your dealer, or you may connect up a latch-type stereo
footswitch.
ENGLISH
7
21. EXTERNAL SPEAKER OUTPUT jack
This is for connecting to another speaker cabinet using speaker cable with a 1/4”
monaural plug. In this case, the sound is not reproduced from the speaker in the
TB50R cabinet. The TB50R can be connected to speaker cabinets with impedances from 16 Ω to 8 Ω.
NOTES:
Do not allow the impedance of the speaker system you are connecting to fall
below 8 Ω, otherwise, the load on the amp will be excessive and damage may
result. Also, take note of the allowable input of the speaker system to be connected.
ENGLISH
The TB50 output power varies according to the connected speaker impedance
as follows.
16 Ω : 25 W 8 Ω : 50 W
To ensure the safety of your system, please refer to above figures and be certain
that your speaker system has more than enough capacity to handle this output.
22. FUSE holder
When a fuse is blown, there may be major damage to the internal circuitry.
Before changing fuses consult your dealer.
23. AC IN
This socket is for the AC cable (included). DO NOT use any input voltage other
than indicated on the panel.
Troubleshooting
1. The power supply cannot be switched on.
• Check that the power cable has been connected correctly.
• Try plugging it into a different socket and see if the same problem
occurs.
2. The power supply can be switched on, but no
sound is heard.
• Check that the guitar has been connected correctly.
• Remove any external components connected to the effects loop
and between the guitar and the amplifier and check to see if any
sound is heard.
•
Use a different shielded cable and check to see if any sound is heard.
• Check to see if the volume on the guitar is set to “0”.
• Use a different guitar and see if any sound is heard.
8
• Check to see if the volume on the amplifier is set to “0”.
• Check to see if the headphones are connected.
3. Noise is heard.
• Check to see if anything in the immediate vicinity is resonating or
banging against the amplifier to produce the noise.·
• Check to see if the plug cover on the shielded cable is loose.
• Use another guitar, effects or other external components, and cable
to see if the same noise is produced.
4. BOOST switch, channel switch, or MID SHIFT
switch does not function.
• These panel switches are disabled if a footswitch or cable is con-
nected to the corresponding footswitch jack.
5. It is not possible to switch between channels with
the foot switch
• Check that the foot switch jack is connected correctly.
6. No sound is produced in the headphones
• Check that the headphones are connected correctly.
• Connect another set of headphones and see if sound is produced.
7. No sound from speaker connected to the EXTERNAL SPEAKER jack.
• Check to see if the headphones are connected.
In case of defects
This product has passed exhaustive inspections before being shipped
from the factory. Ensure that the above procedures are carried out
when a problem is thought to exist. Contact your dealer in the unlikely
event that an abnormality occurs during use. Also, ensure that the
symptoms of the problem are explained in detail when requesting repair in order to facilitate swift handling.
Because of improvements to this product, the specifications may change
without notice.
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