sunn 300T Owner`s Manual

The sunn Legacy...

In early 1963, a band from Oregon called “The Kingsmen” hit the charts
with a catchy little tune called Louie Louie. The Kingsmen quickly became
household names and Louie Louie the rock anthem of the decade.

With a hit single under their belt, The Kingsmen soon found
themselves embarking on a 50 state national tour. One of the first
things bassist Norm Sundholm discovered was that his bass amp,
while fine for hops and school dances, did not have the power
necessary for the larger concert halls to which the band had ascended.
To solve this dilemma, Norm enlisted the help of his brother Conrad
and by 1964 the brothers Sundholm had designed the world’s first high
powered concert bass amplifier.

1965 saw the demand for the Sundholms’ amplifiers increase to the point
that the family garage would no longer serve as a suitable manufacturing
facility. Thus, the SUNN Musical Equipment Company was bor n.

As the years passed, countless pioneers of rock would rely on SUNN
amplifiers to carry the weight. The Who, Moody Blues, Cream,
Steppenwolf, Kiss, Rush, Queen and a little music festival in up-state New
York all endorsed SUNN equipment.

Today, your new SUNN amplifier embodies this rich tradition and
combines it with a vision for the future that this American institution known
for big sound was built upon.

SUNN

®

STAGE GEAR... Attitude, Power and Performance for Professionals

SUNN 300T BASS AMPLIFIER

VACUUM TUBE DESIGN IN BOTH THE
PREAMP AND POWER AMPLIFIER

CONSTRUCTED IN AN ALL STEEL
CHASSIS FOR ENDURING RELIABILITY

300 WATTS OF POWER
TWO CHANNELS WITH CLEAN AND

DISTORTION MODES
TRANSFORMER-BALANCED LINE OUT

WITH SPEAKER EMULATION
FOOTSWITCH JACK FOR REMOTE ON-

OFF SWITCHING OF THE GRAPHIC
EQUALIZER, COMPRESSOR AND
CHANNEL SELECTION

LOW-NOISE DIFFERENTIAL EFFECTS
LOOP FOR SIGNAL PROCESSING
DEVICES

SPLIT BAND COMPRESSOR

Congratulations on your purchase of a Sunn

Bass Amplifier. Built with care and special attention
to detail, your new Sunn 300T Bass Amplifier offers
much more than meets the eye. Each 300T bass
amplifier is crafted from the finest components
available and assembled at the Sunn amplifier factory
in Corona, California, USA.

The Sunn®300T Bass Amplifier includes among its
many features: 300 Watts of power (into 2, 4, or 8Ω);
active compression circuitry and a 10-band graphic
equalizer and high and low frequency controls for full­bodied tonal shaping. The two channels are voiced
for both clean and distortion outputs offering the
versatility of differing playing styles. The footswitch
circuitry allows for remote selection of the front panel
graphic equalizer, compressor and the channel
selection. Moreover , the r ear panel features an ef fects
loop for the addition of external signal processing
devices or outboard gear, an impedance switch for
different speaker cabinet loads, a tuner out jack for
accessing your tuner and both XLR and 1/4 inch line
out jacks and a pass through jack for routing your
bass signal to another amplifier or mixing console.

In order to thoroughly understand the operation,
features and functions of your new Sunn 300T Bass
Amplifier, please read and refer as needed to this
operation manual. By doing so, your amplifier is sure
to provide you with years of trouble-free music
making and maximum playing enjoyment.

®

300T

Take the time to get to know each other... Tune-up,
Plug-in and ... Play On!

WARNING:

-TO PREVENT DAMAGE, FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN
OR MOISTURE.

-NO USER SERVICEABLE PARTS INSIDE,
REFER SERVICING TO QUALIFIED PERSONNEL
ONLY.

-ALLOW AT LEAST 3 INCHES (7.6 CM) IN THE
FRONT AND REAR OF THE UNIT FOR PROPER
VENTILATION. DO NOT BLOCK VENTS.

-THIS UNIT MUST BE EARTH GROUNDED.

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SUNN 300T SETUP PROCEDURES

To ensure optimum performance
from your Sunn 300T Bass Amplifier,
please follow these setup guidelines
and procedures.

From Effects Loop Send to

Effects Processor In

on

off

power

From Power Amp Pass

Through to Effects Loop

Return on another amp

From Footswitch Out Jack to Footswitch

From Effects Processor to
Effects Loop Return

effects

power amp

loop

pass through

return

send

footswitch

From Line Out to External

Power Amp or Mixer

tuner

line out

From Tuner Out to
Tuning Device

out

speaker

impedance

8Ω 4Ω 2Ω

From Speaker

Speaker Cabinets

main

speaker

Jacks to

external
speaker

1. Connect your Sunn 410H / Sunn 215 Bass
Loudspeaker Enclosure or equivalent to the parallel
speaker jacks located on the rear of the 300T
amplifier. Note: For improved performance, DO NOT

daisy chain multiple enclosures off the same jack. As
a rule of thumb, connect only one speaker enclosure
per output jack and remember the total minimum
impedance load for the 300T is 2Ω. Remember to
connect or disconnect any speaker enclosure to your
300T with the power off.

2. Set the SPEAKER IMPEDANCE switch to match
the power amp to the proper speaker impedance
load (item M, page 9).

3. Next, attach the 3-button footswitch and your
tuner to the TUNER OUT and FOOTSWITCH jacks
located on the rear of the amplifier.

4. Connect any effects processing devices through
the EFFECTS LOOP SEND and RETURN jacks on
the rear of the unit.

5. If sending your 300T’s signal to an external power
amplifier or main house mixer, connect a cord from
either the 1/4 inch or XLR LINE OUT jack to your
external power amplifier or mixer.

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