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4. Gain Control
The Traynor Big Block’s Gain control allows you to set the level of the signal before it’s sent to the tone controls. This al-
lows control of the tonal ‘sensitivity’ or ‘definition’ of the amplifier. Higher gain settings will give more ‘growl’ to your bass.
5. Tone Controls
A wide range of sonic possibilities, covering the entire audio spectrum, can be achieved using the four active tone
controls on the Big Block amplifier. Each tone control has a range of ±15 db. The center position denotes a neutral
or nominal setting for all controls. The Bass control adjusts the level of the low frequency and works with the Low
Mid, the next frequency range up helping to scupt your bottom end. The Hi Mid covers the next higher frequency
range and the Treble control adjusts the upper frequency range.
User Tip: When starting out, center all the tone controls and adjust while playing until the desired tone is achieved.
Keep in mind that all tone and EQ circuits are gain-related, which means it may be necessary to re-adjust the Gain
control once the desired tone is achieved. This will help you to retain the amount of clarity or ‘growl’ you desire.
6. Low Expander Control
The Low Expander shapes the tone of the bass by extending the low frequency, reducing the mid frequencies (around
550 Hz) and taming the ultra highs.
7. Master Volume Control
The Master volume adjusts the overall signal level of the amplifier; it is your master “loudness” control.
8. Mute Switch / Tuner Out Jack
The Mute button cuts the audio signal to the speaker/s without affecting the Tuner output.
9. Phones Jack
The Phone jack has been provided for connecting headphones which allows practice or recording without
making any audible sound through the speakers. When you plug headphones in the Big Block, the amplifier is
disconnected from the speaker/s.
Note: When the Phones jack is used, the XLR Line Out, Tuner jack and Effects Send jack are active and still function.
10. EFX Send & EFX Return
The EFX Send (Pre-Amp Out) can be used as an effects send or for sending signal to another power amp. The EFX
Return (Power Amp Input jack) goes directly to the Big Block’s power amplifier, bypassing the pre-amp. The EFX
Return (Power Amp Input) allows audio signals from another pre-amp go directly to the power amp bypassing the
Big Block’s internal preamp, including the tone stack.
Note: The selectable Limiter is applied directly to the signals entering the amplifier helping prevent damage to
the amplifier and/or speakers.
Note: The output signal of the Effects Send (Pre-Amp Out) is set at 0 VU. When using the Effects Send (Pre-
Amp Out) as an effects loop, it’s recommvended to use professional-grade signal processing equipment (pedal
effects might not have enough headroom).
11. Line Out XLR
The Big Block is equipped with a balanced D.I./Line output. You can select a direct, clean signal (Pre-EQ setting
which delivers the sound directly to the Balanced Line Out) or tap the signal after the pre-amp (Post-EQ). Both
signals are routed to the Balanced Line Out before the Master volume. A Ground Lift (lifts Pin 1 of the XLR) is also
provided to help when routing signals directly to other equipment or mixing consoles.
Note: In the Lift position, Pin 1 of the XLR is disconnected which might help reduce ground loop hum when
routing signals directly to other equipment or mixing consoles. If ground loop hum is not present, you may
get superior shielding from outside noise sources with the button in the GND setting. In most cases, it is
recommended to have the switch set to GND.
User Tip: When using the XLR Line out for recording direct-to-computer, we would recommend you insert a suitable
device between the amp and computer such as A.R.T.’s TubeMP with USB for extra gain control and USB conversion.
12. Speaker Output
The Speakon Speaker Output connector allows you to connect an external 8-ohm (min) speaker cabinet. Using an
external speaker DOES NOT defeat the internal speaker!
13. Tweeter In/Out Switch
The Tweeter switch disconnects the internal tweeter which provides a softer and more classic bass amplifier tone,
for more brightness set the switch to the in position.
