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features may be provided with the active pickup, such as equalization, volume control and compression.
Tuner Output Jack — The “tuner output jack is provided to allow a tuner to remain plugged into the amplifier
while playing. This output remains active when the “mute switch is pressed, allowing for tuning your
instrument while not sending signal to either the “direct output or the speaker. Signal level of -30dB (typical
hot bass level) will drive all known tuners.
Input Signal Mute Switch — The input on the NEOX400-210T bass amplifier includes an “input mute switch.
With this switch, you can place the amplifier (and the direct output) in standby mode between sets without
having to change any of your volume settings. This feature is especially handy during the set when using the
tuner output since you will still be able to use your tuner without having sound come from the amplifier or P.A.
system. No more re-patching or fumbling in the dark! A red LED turns on when the input mute is active,
reminding you that you are in “stand-by” mode. This feature is also controlled by the optional 4 button
footswitch.
Input Gain Controls & O/L LEDs — The “input gain controls, in conjunction with the signal and clip LEDs,
allow you to adjust the preamp input gain sensitivities to the instrument you are playing. Basses can have an
output level from a few thousandths of a volt to several volts. Generally, you want to see only an occasional
flash of the red clip LED when you really hit the string hard, then adjust the master volume control for playing
volume. Distortion of the preamp gain stage will occur when the red clip LED is illuminated, so plan
accordingly. The best signal to noise ratio will result with the above method. Setting your playing volume will
be a combination of the “FET gain control (FET channel), “TUBE gain control and “TUBE volume
control (TUBE CHANNEL) and the “master volume control, depending in part on individual preference.
Intentional overloading of the tube channel may be desirable and the O/L LED indicates that you are operating
the tube preamp stage in the overdrive mode. The FET and TUBE preamps are switchable and mixable. These
features are also controlled by the optional 2 button footswitch. Both CHANNEL O/L LEDS are active at all
times monitoring each channels audio level, independent of channel switch position.
Signal Shaping Switches and Controls — There are 3 separate shaping filters on the NEOX400-210T. The
L.F. EXTEND lowers the low frequency roll-off response of the preamp (between 30 and 45 Hz) to allow the
full effect of 5+ string and extended scale instruments. The amount of extension is adjustable depending on
the setting of the corresponding control. Use this function with care due to the power of this amplifier. The “MID
SCOOP function introduces a midrange scoop at approximately 800 Hz, with a lower “Q” than typical
equalization provides. The amount of scoop is adjustable with the corresponding control. The H.F. ATTACK
function increases brightness and sparkle (approximately 4KHz) of the signal, allowing exaggeration of
percussive effects and string sound. The amount of attack is adjustable with the corresponding control. All 3
filters are footswitchable by the optional 4 button footswitch.
Active 5 Band Equalization — The “active 5 band equalization used in the NEOX400-210T amplifiers is
composed of 1 shelving low frequency control, 3 peaking midrange controls and 1 shelving high frequency
control. These filters are not interactive and are effective as an advanced tone control system. The filters have
a cut/boost range of +/- 12dB and a smooth, musical sounding response.
Low Frequency - 80 Hz
Low-Mid Frequency - 200 Hz
Mid Frequency – 500 Hz
High-Mid Frequency – 1250 Hz
High Frequency - 4000 Hz
Master Volume — The “master volume control is post-eq, and adjusts the signal level sent to the power
amplifier. Best results are usually obtained when this control is set between the 9 o’clock and 3 o’clock
position.
Master Section Status Indicators —
• The “power LED indicates that the amplifier is on and the low voltage regulated power supplies are active.
• The “protect LED indicates that the amplifier is in “protect” mode and the output relay is de-energized. This