Owner's Manual

Thump GO 8" Portable Battery-Powered Loudspeaker
10
Thump GO 8" Portable Battery-Powered Loudspeaker
Thump GO: Rear Panel Features continued...
4. /8" Input Jack [Ch. 2]
This input channel may accept an /8" line-level
signal from a phone, tablet, MP3 player, or other signal
source.
NEVER connect the output of an amplifier
directly to a Thump GO’s input jack.
This could damage the input circuitry.
The /8" line-level connection may be used
simultaneously with channel 2’s combo
jack – XLR or /4" – and/or Bluetooth
connection. In other words, if there is a physical
connection to the /8" line input, another physical
connection to the combo jack AND a device is
connected via Bluetooth, none of those inputs
will be interrupted. An easy way to look at it is...
there are extra inputs! The /8" line-level connection
and XLR (or /4") connection sum together
and do not override each other.
5. Mic / Line Switch [Ch. ]
Because an XLR connector may be connected
to a mic or an instrument, this switch adjusts
the channel’s input sensitivity to optimize channel 
for mic or line-level signals. If a mic is connected,
this switch should be engaged and the gain knob –
more below – set to mic. If an instrument is connected
to channel  (via XLR), this switch should be
disengaged and the gain knob set to line.
6. Gain Knobs [Ch.  and 2]
If you haven’t already, please read the “Quick Start”
section on page 4. Setting the gain correctly will ensure
that the preamplifier’s gain is not too high, where
distortion could occur, and not too low, where
the quieter, exquisitely-delicate passages might
be lost in background noise.
The gain knobs – in conjunction with the overload
LED – adjust the input sensitivity of the mic [Ch. ]
and line inputs. This allows signals from the outside
world to be adjusted to run through each channel
at optimal internal operating levels.
If the signal originates through the mic XLR jack,
there will be 0 dB of gain with the knob fully down,
ramping to 40 dB of gain fully up, with unity gain “U”
at 2:00.
Through the /4" line inputs, there is –20 dB
of attenuation fully down and +20 dB of gain fully
up, with unity gain “U” at 2:00.
If connecting mixer outputs to Thump GO
inputs, set the gain knobs to 9:00 [“LINE”]
for optimal sound and performance.
Keep in mind that these “MIC” and “LINE”
markings are for reference only and may
need to be raised or lower.
7. Thru Jack
This is a balanced male XLR-type connector
that produces a mono-summed pre-DSP mix
from all input jacks. It is not aected by the main
volume. Use it to connect an additional Thump GO
or subwoofer o of the same signal source.
It is wired as follows, according to standards
specified by the AES (Audio Engineering Society):
Balanced XLR Output Connector
Pin  – Shield (ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
8. Main Knob
The level knob adjusts the overall signal level
at the input to the built-in power amplifiers.
It ranges from – (o, knob fully down) up
to max (+6 dB, knob fully up), with unity gain
at the center position (2 o’clock).
• Thump GO is designed to operate with a +4 dBu
average line signal when the main knob and the line
input gain are at the center position (unity).
• Thump GO may accept up to a +20 dBu line signal
by turning down the line input gain accordingly
(with the Ch.  mic / line switch disengaged – line).
If the overload LED illuminates, slowly turn down
the input gain until the warning disappears.
• If the Ch.  mic / line switch is engaged [mic],
turning up the channel  gain knob will provide
enough gain to connect a microphone directly.
Start with the main at the center position,
and don’t be afraid to crank the channel  mic gain.
9. Voicing Modes
The voicing mode allows you to change the
Thump GO’s voicing to tailor it to best suit your
particular application. Press the voicing mode
button repeatedly until the LED of the voicing
mode you desire is illuminated.
The four speaker modes are as follows:
• MUSIC Voicing Mode – This mode is full range,
but focuses on increased bass and brilliant high
frequencies. This is the place to start for most DJ /
music playback applications.
• SPEECH Voicing Mode – This mode features
a significant low frequency roll-o to attenuate
low-end vocal boom. It also adds boost to high
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SHIELD
COLD
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SHIELD
COLD
HOT
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