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World Series
Professional Power Ampli er
World 2.1
650W x 2 @ 4 Ohms
400W x 2 @ 8 Ohms
1800W x 1 @ 4 Ohms bridged
1300W x 1 @ 8 Ohms bridged
The Stewart Audio World 2.1 Professional Power Ampli er
is designed speci cally for the unique requirements of
high quality commercial, industrial and Pro Audio sound
installations. The World 2.1 produces sound which is
smooth and uncolored, while offering a full detailed low
end response with lots of horsepower. The high-frequency
switch mode power supply and Class H ampli er design
adapt to the demands placed upon them, enabling the
ampli er to run with maximum ef ciency regardless of the
load impedance. With incredible ef ciency, up to 4 World
2.1’s can typically run on one standard 20 amp circuit.
Weighing in at just 17 lbs and occupying two standard rack
spaces, the World 2.1 is the perfect balance of power and
sonic performance.
Features:
• Two channel ampli er, optimized to
drive 4 Ohm and 8 Ohm loads.
• Variable speed fan
• Clean full–range dynamic power
• Bridgeable
• Ultra ef cient switch mode power supply
• 3 Years parts and labor warranty
• Made in the USA
Applications:
• Sound Reinforcement
• Pre/Post Productions
• Music and Paging Systems
• High Quality Distributed Sound Systems
• Fixed Installations
• Instrument Rigs
• UL Certi cation
14397 Cuesta Court Ste D1 • Sonora, CA 95370 • TEL: 209.588.8111 • www.stewartaudio.com
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World 2.1
650W x 2 @ 4 Ohms
400W x 2 @ 8 Ohms
1800 x 1 @ 4 Ohms bridged
1300W x 1 @ 8 Ohms bridged
Specifications
Output Power
Frequency Response (+0, –0.5 dB, 1W)
Signal to Noise Ratio (SNR)
THD+N
Damping Factor
Slew Rate
Input Sensitivity
Standard Voltage Gain
Input impedance (Balanced / Unbalanced)
Idle Current Draw SW On & 1/8 power draw
Class
Input Connectors
Output Connectors
Power Supply
Cooling
Controls
LED Indicators
Construction
Dimensions (height, width, depth)
Weight
Warranty
650W x 2 @ 4 Ohms
400W x 2 @ 8 Ohms
1800 x 1 @ 4 Ohms bridged
1300W x 1 @ 8 Ohms bridged
20 Hz—20 kHz
>100dB
<0.1%
>500
30V/microsecond
1V (0 dBV)
66X (+36.4dB)
20k Ohms/10k Ohms
.72/4.7 Amps
H
Rear Panel 3 pin XLR, 1/4 Phone, Barrier Strip
Rear Panel 6 gauge, 5–Way binding post
High speed switching
Variable speed fan
Power on/off, channel gain
Power, Signal present, -3dB & clip
Aluminum chassis & cover
8.9” x 19” x 15.3”
17 lbs (7.7 kg)
3 years
Architects & Engineering Specifications
The power ampli er shall consist of 2 channels. Model World
2.1 shall deliver a minimum of 400W at 8 Ohms, both channels
driven, 20 Hz—20 kHz, < .1% THD. The ampli er shall be fan
cooled. The ampli er shall have circuitry to protect itself and
the speaker loads from output short circuits, DC voltage on
the outputs, and thermal overload. The ampli er shall have a
voltage gain of 40X (32dB) and an input Sensitivity of 1V for
rated power at 4 Ohms output. The hum and noise level shall
be greater than 100 dB below rated output “A” weighted. The
ampli er shall have a class H output stage and a high–speed
Switch Mode Power Supply. Non Switch Mode Power Supplies
will not be accepted. The frequency response shall be greater
than 15 Hz to 45 kHz +0, – 3dB at rated power. The ampli er
shall operate on 120VAC. The front panel shall contain, for
each channel, a knob adjust, detented level control, LED
indicators for -20 dB signal present, -3dB, Clip, and Power. The
power switch shall be a power supply enable switch. The Rear
panel shall contain a captive AC line cord. The rear panel input
terminals shall be both 3 pin XLR, 1/4” Phone and Barrier Strip.
The ampli er dimensions shall be 19” (48.3 cm) wide, 3.5” (8.9
cm) high, and 15.3” (38.9) deep. The World 2.1 shall weigh
17 lbs (7.7 kg). The ampli er shall be designated the Stewart
Audio Model World 2.1
14397 Cuesta Court Ste D1
Sonora, CA 95370
TEL: 209.588.8111
www.stewartaudio.com
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