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ULTRATWIN GX210
1.3.2 Rear panel
Fig. 1.3: The rear panel connectors
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FUSE HOLDER/VOLTAGE SELECTOR. Please make sure that the voltage indicated on the unit matches
your local voltage, before you attempt to connect and operate the ULTRATWIN GX210. Blown fuses
may only be replaced by fuses of the same type and rating. Some models allow for inserting the fuse
holder in two different positions, in order to switch over from 230 V to 115 V operation, and vice versa.
Please note that for 115 V operation outside Europe, you need to use a fuse of a higher rating (see
chapter 5 “INSTALLATION”).
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Use the enclosed power cord to connect the unit to the mains.
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SERIAL NUMBER. Please take the time to have the warranty card filled out completely by your specialized
dealer, and return it within 14 days after the date of purchase, so as to be entitled to benefit from our
extended warranty.
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MIDI IN. This connector gives you MIDI remote control over your ULTRATWIN. You can change parameters
using controller information, switch over effect programs, change channels and bypass the effects module
by means of program change instructions.
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The SPK OFF button allows you to mute the speakers of your ULTRATWIN, for example, when using a
pair of headphones or during concerts.
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The 1/4" stereo jack allows you to monitor the ULTRATWIN’s audio signal with a pair of commercially
available headphones.
+ Since speakers can have quite an impact on the sound of a guitar amp, both the headphones
and LINE OUT/TAPE OUT signals are frequency-corrected (Speaker Emulation). Without this
frequency correction, extreme treble frequencies would deteriorate the sound. You can still
tap the unprocessed signal directly after the pre-amp (INSERT SEND jack), without interrupting
the signal path in the amplifier (INSERT RETURN jack may not be used in this case). Starting
with a certain volume level, low-impedance headphones may begin to produce distortion. In
such a case, please reduce the volume by turning down the VOLUME controls.
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Using the SLAVE IN jacks you can feed in an external signal to be routed to the ULTRATWIN’s power
stage. In this case, the connection between preamp and power stage will be disabled. These jacks are
designed to drive a master guitar amp from the ULTRATWIN’s power stage. Of course, you could also
insert a guitar preamp.
+ Since the SLAVE IN jacks are configured as insert jacks, you can also insert an external stereo
effects device. Use a dedicated insert cable which has a 1/4" stereo plug on the one end, and
two mono plugs on the other. Connect the tip contact (return) with the output, and the ring
contact (send) with the input of the effects device (see chapter 2.3).
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The TAPE OUT jack provides the same signal as the LINE OUT jacks, however, has RCA jacks for
direct connection to a tape deck or HiFi system.
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The TAPE IN jacks are the same as the AUX IN, however, have RCA jacks for direct connection to a
tape deck or a HiFi system.
1. INTRODUCTION
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