WRA WR Goliath User manual

http://www.wra.lu updated: 21/01/2017 14:29 email: [email protected]
(new 12 Volt version)
Control and Indicator Light Layout – Faceplate
Controls and In/Out Connections – Top of Unit
Controls and XLR-DI Out Connector

http://www.wra.lu updated: 21/01/2017 14:29 email: [email protected]
WR Goliath Tube Bass Emphasizer “DI”
The WR Goliath Tube Bass Emphasizer “DI” is an exciting new development for bass players wanting
the richer, enhanced tonality associated with tubes.
This unique and innovative design is based on a specialised and limited availability ECC86 NOS tube,
optimized to operate on 24 Volt DC, to create wonderful tone in a limited-edition, hand-built unit.
No bass pedal board should be without one!
Equally effective across the frequency range (20 Hz – 18 KHz), from low-level to LOUD, the quality of the
sound is consistently high, allowing the same amazing sound on stage as achieved in the studio.
Tone controls and switches allow creating unique sounds, thanks to the way they interact together.
The Goliath will not change the basic sound of your Bass Guitar(s) as other preamps often do.
The Goliath is equipped with a “DI-XLR” Output for galvanic isolation with a “Lehle LTDI-L transformer”.
The “DI” Output also works in "bypass mode" and even without connecting the power supply.
This unit is also wired for “true bypass” operation.
Description
•The WR Goliath Tube Emphasizer “DI” was created as a way of adding the warm harmonic
sounds associated with the use of tubes to set-ups using solid-state amplifiers: to ‘push-up’ the
sound.
•This unit is powered by a 12 Volt DC power supply and operate internally with 24 Volt – as
required by the tube. This special feature of this pre-amp ensures user safety because there is no
high voltage on interior or exterior components.
•The Goliath has been designed to give the best results: a great sound from a robust and easy to
use product. The construction methods and components used are selected only for their high
quality and the positive effects they contribute (paper in oil capacitors).
•The Goliath is not a mass-produced product. The components are carefully checked, and then
each unit is assembled individually, using point-to-point (hand soldered) connections.
•All these steps combine to create a limited edition, hand-built pre-amp of the highest quality
that will enhance the sound of any bass guitar setup.
Features
•The WR Goliath Tube Emphasizer “DI” allows you to get the warm harmonic sound of an
electron tube, combined with a little more compression and, if necessary, a higher output volume.
•The Goliath can also be used as standalone unit, for example as a direct plugin to a mixing table
or a recording unit etc. in this case be sure to use the symmetric “DI-XLR Output”
•The "GND/LIFT switch": move the ground button on "Lift" position to eliminate hum. If the
ground switch is on "Lift" position the built-in “Lehle” transformer ensures galvanic isolation
between the shielding of the Goliath and the earth conductor of the XLR cable attached. If this
setting generates hum, activating the ground switch may solve this. When the ground button is on
position "GND", the shielding of the DI and the earth conductor of the XLR cable are connected.
•The “Tone controls” Treble, Middle and Bass allow you to have a good overall sound control,
with a good basic Bass sound. The output sound is created by the combination of the settings of all
three controls: the frequencies affected by each control are changed somewhat by the settings of
the other controls. This allows more frequencies possibilities.

http://www.wra.lu updated: 21/01/2017 14:29 email: [email protected]
•The “Sensitive Potentiometer”the sensitive input-gain potentiometer continuously controls the
input gain.
•The “Deep switch” increases and slightly changes the Bass frequency.
•The “True Bypass Footswitch” allows you to switch the unit between active and passive mode.
•Reverse polarity protection.
•All components are individually selected and are carefully checked before installation.
Operation
1) Connect the WR Goliath Tube Bass Emphasizer “DI” using the “JEC Output” to the Input of your
power amp. Connect, if needed, to the mixing table or computer using the “DI-XLR” Output.
2) Turn the Volume potentiometer of the Goliath to ‘0’
3) Plug the AC/DC power adapter into a 100 - 220 Volt supply and then connect the lead from the
adapter into the DC socket of the Goliath.
4) Plug your Guitar into the Input of the Goliath.
5) Enjoy.
*When turning the „Sensitive Potentiometer”, you may occasionally hear a kind of
rasping noise (wiper scratch). This is no technical deficiency, but due to the high sensitivity of
the unit. I have taken care to leave out all components not absolutely necessary, to keep the
basic sound of the bass as authentic as possible.
Hardware
•Robust Die cast Aluminium Enclosure.
•Tube: ECC86 or 6GM8 (Russian designation), tube designed to work optimally with 24 Volts.
•A “Sensitive Potentiometer”
•A “Deep switch”
•A “Bypass switch”
•A “DI-XLR” symmetric Output signal plug with Ground switch.
•A “Lehle LTDI-L Transformer”.
•Oversized oil film (Paper in Oil) capacitors for improved tone.
•Large Potentiometers.
•Point to point wiring (hand soldered).
•Power supply 100-240 Volt AC to 12 Volt DC 1 Amp.
•Reverse polarity protection.
A respected Bass player has said
“This unit gives me a warm harmonic sound and the dynamic range over all frequencies of
the WR Goliath Tube Emphasizer “DI” is amazing. I won’t play without it; it gives a pure
sound to my ‘solid state’ amplifier and even improves the sound of my tube amplifiers!
“The possibility to connect the Goliath directly to recording units, mixing tables or computers
using the “DI-XLR” output is a great feature.”

http://www.wra.lu updated: 21/01/2017 14:29 email: [email protected]
Package
The package contains:
•1x WR Goliath Tube Bass Emphasizer “DI”.
•1x power supply (100 - 240 Volt AC to 12 Volt DC 1 Amp).
•Operating Manual/Instructions.
Functionality checks/Problem Solving
•If all LEDs; Power LED (Blue); Switch LED (Red) and logo backlight LED are lit then the unit is
working correctly.
•If the Power LED (blue) is not working, there could be a problem with the current
supply. Please check the power supply and take a look at the electric poles: + (plus)
has to be on the inside, - (minus) on the outside of the jack. (see Picture)
•If the Bypass LED is not lit there may be a problem with the tube heating circuit.
•If a tube replacement is necessary be sure to use only exactly an ECC86 or 6GM8
(Russian designation) type - no other tube types are suitable and will destroy other electronic
components in the pre-amp. If you are unable to find an appropriate tube, contact us. I will send
you a tube as soon as is possible.
Technical data
•Weight: 1009 g
•Length: 19,5 cm
•Width: 12,5 cm ?
•Overall height: 8.6 cm
•Voltage range: 24V DC
•Power consumption: max. 380 mA
•Frequency range: 20 Hz – 18 KHz
•Input impedance: 1 MOhm
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