Olsson STAGE 40 NORD User manual

STAGE 40 NORD
Owner’s Manual
Olsson Amplifiers 2015 – www.olssonamps.com

Important Safety Instructions
This symbol warns the user of dangerous voltage levels localized within the enclosure.
This symbol advises the user to read all accompanying literature for safe operation of the unit.
•Read this manual carefully before switching on your amplifier. Heed all warnings.
•Only connect the power supply cord to an earth grounded AC receptacle in accordance with the voltage
and frequency ratings listed under VOLTAGE on the rear panel of this product.
•Vacuum tube amplifiers generate heat. Maintain at least 25 cm of unobstructed air space behind the
unit to allow for proper ventilation and cooling of the unit. Keep away from curtains or any flammable
objects.
•WARNING: To prevent damage, fire or shock hazard, do not expose this unit to rain or moisture.
•Unplug the power supply cord before cleaning the unit exterior (use a damp cloth only). Wait until the
unit is completely dry before reconnecting to power.
•Never touch a hot vacuum tube.
•This product should be located away from heat sources such as radiators, heat registers, or other
products that produce heat.
•Protect the power supply cord from being pinched or abraded.
•Never operate the amplifier without a connected speaker or load since this can cause severe damage
to the amplifier.
•The power supply cord of this product should be unplugged from the outlet when left unused for a long
period of time, or during electrical storms.
•This product should be serviced by qualified service personnel when: the power supply cord or the plug
has been damaged; or objects have fallen; or liquid has been spilled onto the product; or the product
has been exposed to rain; or the product does not appear to operate normally or exhibits a marked
change in performance; or the product has been dropped, or the enclosure damaged.
•Do not drip or splash liquids, nor place liquid filled containers on the unit.
•CAUTION: No user serviceable parts inside, refer servicing to qualified personnel only.
•Olsson amplifier and loudspeaker systems are capable of producing very high sound pressure levels
which may cause temporary or permanent hearing damage. Use care when setting and adjusting
volume levels during use.

SVENSKA
Viktiga säkerhetsinstruktioner
Den här symbolen varnar användaren för farliga spänningar inuti apparaten.
Den här symbolen uppmanar användaren att läsa all säkerhetsinformation som levererats
med apparaten.
•Läs denna handbok noggrant innan du slår på förstärkaren. Följ alla varningsanvisningar.
•Apparaten måste anslutas till jordat nätuttag med den spänning och frekvens som anges vid VOLTAGE
på baksidan av produkten.
•Rörförstärkare avger värme. Se till att det finns minst 25 cm fritt utrymme bakom förstärkaren, detta
för att säkerställa en ordentlig ventilation och kylning av enheten. Håll apparaten borta från gardiner
och annat brandfarligt material.
•VARNING: För att undvika skada, eldsvåda eller elektrisk chock, utsätt inte apparaten för regn eller
fukt.
•Dra ur nätsladden från vägguttaget innan du rengör utsidan av apparaten (använd endast en fuktig
trasa). Vänta sedan till apparaten torkat helt innan du ansluter nätsladden igen.
•Ta aldrig på ett varmt elektronrör.
•Produkten skall hållas på ordentligt avstånd från värmekällor såsom radiatorer, varmluftsutblås eller
andra apparater som alstrar värme.
•Skydda nätsladden från att bli klämd eller skadad.
•Använd aldrig förstärkaren utan ansluten högtalare eller motsvarande last då detta kan orsaka
allvarlig skada på förstärkaren.
•Nätsladden skall dras ur nätuttaget när förstärkaren inte kommer att användas under en lång tid eller
vid åskväder.
•Denna produkt skall ses över av kvalificerad servicepersonal när: nätsladden eller nätkontakten har
skadats; eller om föremål har ramlat over den; eller om vätska har spillts över produkten; eller om
produkten utsatts för regn; eller om produkten inte verkar fungera normalt eller att prestandan skiljer
sig från det normala; eller om produkten tappats eller om höljet skadats.
•Droppa eller stänk inte vätska på apparaten. Ställ heller inga föremål som innehåller vatten på den.
•VARSAMHET: Inga delar inuti apparaten kan repareras av användaren, anlita kvalificerad
servicepersonal.
•Förstärkare och högtalarsystem från Olsson Amps kan producera höga ljudnivåer som kan orsaka
temporära eller permanenta hörselskador. Var försiktig vid inställning och justering av ljudvolymen.

Stage 40 Nord Amp
Together with Mikael “Nord” Andersson we have developed Stage 40 Nord, which is an all-tube hand-
wired amp built to meet all modern requirements.
The amp has dual channels and is designed to work excellent with all type of guitar microphones.
The two channels have different voicing and can be mixed together with the volume controls. Due to
the well balanced tone, you don't need anything but a tone control to tune in the sound you like. It’s
an awesome tone machine with a warm and rich tone. The lower settings of the volume control
result in harmonically rich, clean tones, when cranked, the amp will inspire you with fat, compressed,
distorted tones. With the master volume at max you will have lot of headroom and with lower
settings the headroom is decreasing and the amp gives you a nice distorted tone at lower volumes.
All components used are carefully selected and of highest quality for best sound experience.
Thank you for buying this amp. We are confident that you will be satisfied with your choice!
Enjoy!
Features include:
•Hand-wired all tube circuitry on turret board.
•Old school EL34 circuit for sweet warm tone produces 40 Watts.
•Two mixable channels with individual volume controls.
•Well balanced spring reverb.
•Finger joined solid pine cabinet resonates with a warm tone.
•Foot pedal included

Getting started
1. Connect the amplifier to a grounded A/C outlet in accordance with the voltage and frequency
ratings specified for your amplifier.
2. Make sure that a speaker is connected to the speaker jack. Never operate the amplifier without a
speaker connected. Make sure the impedance matching is correct. This amp is designed for a
2, 4 or 8 ohms load depending on impedance switch setting.
3. Make sure the “Standby” switch is OFF
4. Set the “Power” switch to position ON.
5. Wait for at least 60 seconds to allow the filaments to heat up.
6. Make sure that the volume controls are set to 1.
7. Switch the “Standby” switch to ON.
The amplifier is now ready for use.
Connect your instrument to the INPUT jack.
Rear panel
A. ELECTRIC LINE CORD, MAIN FUSE – Connect to a grounded A/C outlet in accordance with
the voltage and frequency ratings specified for your amplifier. The main fuse is an integrated
part of the power jack. Replace only with T1.6A (1.6A slow blow) fuse.
B. INTERNAL SPEAKER JACK 1,2– Plug-in connectors for the internal speaker. A speaker
must always be connected to this jack when the amplifier is turned ON. A speaker
impedance load of 2, 4 or 8Ω(depending on impedance switch setting) should be used to avoid
damage to the amplifier.
C. OUTPUT IMPEDANCE SWITCH – With this switch you can select the output impedance to
match the connected speaker(s) impedance.
Stage 40 Nord 1x12” amp –select 8ohm for the internal speaker
Stage 40 Nord 2x12” amp - select 4ohm for the internal speakers
D. FOOTSWITCH JACK – Connect the footswitch to this jack.
VACUUM TUBES
Replace tubes only with the same type and ratings as specified.
Be sure to use matched EL34 power tubes. You must adjust the BIAS when
replacing power tubes. Only let authorized service personal change and adjust the
amp for you.
A
C
B
D

Control panel
E. POWER SWITCH – Turns the amplifier on-off as indicated by the jewel unit.
F. STANDBY – When the amplifier is on, Standby will mute all audio output from the amplifier.
Use Standby during short breaks to avoid the tube warm up delay.
Select Standby for the first 60 seconds when switching the amplifier ON to extend tube life.
G. JEWEL UNIT – Indicating power on
H. DEEP CUT – Decreases the low frequency response.
I. REVERB – Sets the amount of reverb mixed into the dry sound.
J. MASTER – Adjusts the overall volume. Make the input Volumes high and the master low to get
some distortion at lower levels.
K. TONE – Adjusts the tone characteristics of the amplifier.
L. VOLUME 2– Adjusts the volume of channel 2. Channel 2 is a bit brighter then channel 1.
M. VOLUME 1 – Adjusts the volume of channel 1.
N. INSTRUMENT INPUT – Input jack for your guitar.
Specifications
Type: ST401 (1x12”)/ST402 (2x12”)
Pre amp tubes: 3 x ECC83/12AX7, 1 x 12AT7
Power amp tubes: 2 x EL34
Input impedance: 1MΩ
Output power: 40W
Output impedance: 2, 4 or 8 ohm
Power requirement: 150 Watt
Speaker: Celestion Creamback 65W
Dimensions (W*D*H): ST401 - 267(l)x605(w)x435(h), ST402 - 230(l)x715(w)x540(h)
Weight: ST401 - 24kg , ST402 30kg
Operating temperature: 0-35°C
Product specifications are subject to change without notice
EUROPE ONLY - NOTE: This equipment has been tested and found to comply with the
requirements of the EMC directive (Environments E1, E2 and E3 EN 55103-1/2) and the Low Voltage
Directive in the EU
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Changing power tubes
Note: When changing power tubes you must always adjust the BIAS setting inside the amp. Leave the
bias adjustment to qualified service personnel. Never open the amp by your self, there is high voltage
inside the enclosure.
We deliver the amp with EL34 power tubes from Electro Harmonix.

A PRODUCT OF:
OLSSON AMPS
STOCKHOLM, SWEDEN
2015 – STAGE 40 NORD, OWNER’S MANUAL - VERSION 1.0, 060131007