Electro-Harmonix SPRUCE GOOSE OVERDRIVE User manual

POWER SUPPY REQUIREMENTS:
Voltage: 9VDC Current: 20mA Polarity: Center-Negative Battery: 9V
This device may be powered with an Electro-Harmonix 9.6DC-200, MOP-D10, or S8 power supply. Use of the
wrong adapter or a plug with the wrong polarity may damage the device and void the warranty. Do not exceed
12VDC on the power plug. Power supplies rated for less than 50mA can cause the device to act unreliably.
Operating Instructions
Connect your guitar to the INPUT jack of the Spruce Goose and the AMP
jack to your amp’s input. Press the footswitch to ensure the LED is lit.
Your Spruce Goose is now ready to play.
A good starting point is to set the knobs to their 12 o'clock positions, and
then adjust the LIFT toggle switch for the right amount of break-up. Further
tweak the knobs to dial-in your perfect setting.
Welcome to the Electro-Harmonix Spruce Goose, a compact,
natural overdrive with a wide range of tonal and gain settings.
Sculpt your sound with separate TREBLE and BASS EQ knobs.
Dial-in just the right amount of dirt, from barely there to over-
the-top, using the GAIN knob and LIFT switch. The Spruce
Goose also features mechanical relay true bypass on a soft
footswitch and optional 9V battery power.

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Controls and Connections
1. GAIN Knob Adjusts the amount of gain and distortion. As you turn this knob clock-
wise, your signal gets louder and more saturated.
2. TREBLE Knob Controls the high frequency EQ of your signal. The higher the setting,
the brighter the output signal.
3. BASS Knob Controls the low frequency EQ of your signal. The bass EQ is at at noon.
As you turn BASS clockwise from noon, the bass response increases. As you turn
counterclockwise from noon, the bass response is cut.
4. VOL Knob Sets the output level of the Spruce Goose.
5. LIFT Switch LIFT gooses the input signal before it hits the overdrive circuit. The
mid position provides 9dB of gain, which helps get more drive from low output
pickups. The high position provides 21dB of gain, adding even more saturation and
distortion. The low position does not provide any additional gain.
6. FOOTSWITCH and STATUS LED The soft footswitch engages or bypasses the effect.
The status LED lights when the effect is engaged. The LED is off in bypass. The

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Spruce Goose employs True Bypass with a mechanical relay. The footswitch includes
a momentary action when you press and hold the switch for more than half a
second. The momentary footswitch action may also be disabled, see the section
Footswitch Latching and Momentary Action.
7. INPUT Jack Audio input jack. Impedance: 680kΩ.
8. AMP Jack Audio output Jack. Impedance: 550Ω.
9. 9VDC Power Jack An optional 9VDC, center-negative power supply can be connected
to the power jack to provide power without a battery. The Spruce Goose requires 20mA
at 9VDC on a center-negative plug. Do not exceed 12VDC at the power jack.
When using a 9V battery, plugging into the INPUT jack activates power. The input cable
should be removed when the unit is not in use to avoid running down the battery.
To change the 9-volt battery, you must remove the 4 screws on the bottom of the
Spruce Goose. Once the screws are removed, you can take off the bottom plate and
change the battery. Please do not touch the circuit board while the bottom plate is
off, or you risk damaging a component.
Footswitch Latching and Momentary Action
The soft footswitch works both like a standard latching footswitch and a momentary
footswitch. The latching action means each press and release of the footswitch will
toggle between bypass and effect modes. A momentary change between bypass and
effect occurs when you press and hold the footswitch. The Spruce Goose changes state
immediately upon pressing the footswitch. If you continue to hold the footswitch—
for more than half a second—it will return to the previous state when you release
the footswitch.
Momentary hold action can be disabled completely by performing the following
procedure:
1. Power down the Spruce Goose.
2. Press and hold the footswitch.
3. While holding down the footswitch, apply power to the Spruce Goose.
4. Continue to hold down the footswitch. After about 2 seconds, the LED blinks.
A slow blink means momentary footswitch holds are disabled. A fast blink
means momentary footswitch holds are enabled.
5. Release the footswitch.
The momentary footswitch hold setting is remembered through power-cycles so you
can set it and forget it.
Notes and Specications
Audio input impedance at INPUT jack: 680kΩ
Audio output impedance at AMP jack: 550Ω
Current draw: 20mA at 9VDC
Power Supply: 9VDC, Center-negative polarity
True bypass switching

WARRANTY INFORMATION
Please register online at www.ehx.com/product-registration or complete and return
the enclosed warranty card within 10 days of purchase. Electro-Harmonix will repair
or replace, at its discretion, a product that fails to operate due to defects in materials
or workmanship for a period of one year from date of purchase. This applies only to
original purchasers who have bought their product from an authorized Electro-Har-
monix retailer. Repaired or replaced units will then be warranted for the unexpired
portion of the original warranty term.
If you should need to return your unit for service within the warranty period, please
contact the appropriate ofce listed below. Customers outside the regions listed be-
low, please contact EHX Customer Service for information on warranty repairs at
[email protected]om or [phone]. USA and Canadian customers: please obtain a
Return Authorization Number (RA#) from EHX Customer Service before returning your
product. With your returned unit, include a written description of the problem as well
as your name, address, telephone number, e-mail address, RA# and a copy of your
receipt clearly showing the purchase date.
The CE logo indicates that this product has been tested and shown to conform with all applicable
European Conformity directives.
The WEEE or “trashcan” logo indicates that this product is made up of electronic components that should not
be trashed alongside household waste but instead should be recycled by a proper electrical waste facility.
United States & Canada
EHX Customer Service
Electro-Harmonix
co New Sensor Corp.
47-50 33rd Street
Long Island City, NY 11101
Tel: [phone]
Email: [email protected]om
UK
John Williams
Electro-Harmonix UK
13 Cwmdonkin Terrace
Swansea SA2 0RQ
United Kingdom
Tel: [phone]
Email: [email protected]om
This warranty gives a purchaser specic legal rights. A purchaser may have even greater rights depending
upon the laws of the jurisdiction within which the product was purchased.
Europe
Musik Elektronik
EHX Repair Center
Ötterichweg 7
D-90411 Nürnberg
Germany
Tel: [phone]
Email: [e-mail]
COMPLIANCE
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that inter-
ference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Modications not expressly approved by the manufacturer could void the user’s authority to oper-
ate the equipment under FCC rules.