Active Loudspeaker System User’s Guide
Your new Active Loudspeaker System will add high-quality audio playback capabilities
to your workstation. This user’s guide explains how to set up and use your speakers in
the following sections:
• “Installing the Speakers” on page 2
• “Operating the Speakers” on page 4
• “Technical Specifications” on page 6
Note: For safety and regulatory information, see the user’s manual that came with your
workstation.
© 2002, Silicon Graphics, Inc. All rights reserved.
SGI and the SGI logo are registered trademarks of Silicon Graphics, Inc.
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Active Loudspeaker System User’s Guide
Installing the Speakers
This section explains how to set up your speakers. See Figure 1 while you follow these
steps.
1. Before you begin, ensure that you received all of the following components with
you shipment:
• 1 right speaker with I/O panel and control knobs
• 1 left speaker with captive input cable
• 1 10-ft. stereo input cable with 3.5-mm jack on each end
• 1 power supply transformer module with captive output cord
• 1 AC line cord with geography-specific plug
If any of these components are missing, contact your sales representative.
2. Place the right speaker on the right side of your monitor; place the left speaker on
the left side.
3. Connect the left speaker input cable to the jack labeled Left Speaker on the rear of
the right speaker.
4. Connect one end of the 10-ft. stereo input cable to the jack labeled InputSignal on the
rear of the right speaker; connect the other end of the cable to the audio output jack
on your workstation.
Note: Some workstations use an adapter to connect the speakers to a USB port. If
your workstation does not have a 3.5-mm audio output jack, you need to install the
USB digital audio converter. Refer to the documentation that ships with the
converter for more information.
5. Ensure that the knob labeled Off/On on the front of the right speaker is turned all the
way to the left. Then, connect the DC power input cord to the jack labeled 18.5 VDC
on the rear of the right speaker.
6. Connect the AC line cord to the power supply transformer module. Then plug the
AC line cord into an approved electrical outlet. A illuminated green LED on the
power supply transformer module indicates that power is present.
7. Ensure that the cables and cords are not stretched or pinched in their installed
positions.
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Active Loudspeaker System User’s Guide
This completes the installation of your speakers. For operating instructions, proceed to
the next section.
To Audio
Source
A
C
I
N
Figure 1 Installing the Speakers
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Active Loudspeaker System User’s Guide
Operating the Speakers
This section contains rules and instructions for operating your speakers.
Operating Rules and Precautions
When operating your speakers, follow these rules:
• To prevent risk of electrical shock, do not open the speaker housings or power
supply transformer module.
• Do not expose the speakers or power supply to water or other liquids.
• Always disconnect the power cable from the speakers before adjusting any other
cables.
• To prevent data loss, keep floppy disks and tapes at least four inches away from the
speakers.
• Fluorescent and neon light fixtures can cause interference. Move the speakers away
from these fixtures to eliminate interference.
• Do not use solvents to clean the speakers; wipe them with a damp soft cloth.
• Do not expose the speakers to direct sunlight, excessive dust, or harsh vibration.
• Use only the AC power adapter than came with your speakers. Using another
power supply can damage them.
Powering On and Off
Find the knob labeled Off/On on the front of the right speaker. To turn on the speakers,
turn this knob to the right; to turn them off, turn the knob to the left until it clicks. If the
speakers are on, a green LED on the right speaker will illuminate.
Adjusting Volume
Find the knob labeled Off/On on the front of the right speaker. Turn this knob to the left
to decrease volume; turn the knob to the right to increase volume.
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Adjusting Tone
Find the knobs labeled Bass and Treble. Turn either knob to the left to decrease the bass
or treble response; turn either knob to the right to increase the bass or treble response.
Connecting Peripherals
The right speaker has two additional output jacks that can accommodate a pair of
headphones and a sub woofer. The headphone jack is located on the front of the right
speaker, to the left of the knobs. The subwoofer jack is located on the rear of the right
speaker, next to the left speaker output jack. These jacks are covered with small rubber
plugs to prevent interference. When these jacks are not in use, keep the covers in place.
Testing the Speakers
To test your speakers, follow these steps:
1. Power on your workstation and log in.
Active Loudspeaker System User’s Guide
2. Enter the following command to produce an audio signal:
sfplay /usr/share/data/sounds/soundscheme/soundfiles/*
Turn the volume knob on the right speaker clockwise until you hear the sounds.
Then adjust the volume and tone controls on your speakers to the desired levels. If
you do not hear anything, check the following:
• Is your workstation producing an audio signal? Check the console output for
error messages.
• Are the speakers powered on and is the volume set to an audible level? An
illuminated green LED on the right speaker indicates that power is present.
• Are all cables connected as shown in Figure 1?
If all of these criteria are met and your speakers still do not produce any sound, turn them
off and contact your service representative.
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Active Loudspeaker System User’s Guide
Technical Specifications
The following tables provide technical specifications for the speaker system.
Table 1 Component Dimensions
Component Dimensions
Speaker housing Height: 253.63 mm (9.99 in.)
Width: 106.45 mm (4.19 in.)
Depth: 165.1 mm (6.50 in.)
Power supply
transformer module
AC line cord Length: 1.83 meters (6 ft.)
DC power input cord Length: 1.22 meters (4 ft.)
Stereo input cable Length: 3 meters (10 ft.)
Left speaker input cable Length: 1.83 meters (6 ft.)
Table 2 Environmental Specifications
Variable Operating Tolerance Non-operating Tolerance
Temperature 0 °C to 40 °C -10 °C to 65 °C
Relative humidity 10% to 80%, non-condensing 5% to 95%, non-condensing
Altitude 10,000 ft. 40,000 ft.
Length: 114.3 mm (4.50 in.)
Width: 57.15 mm (2.25 in.)
Height: 28.58 mm (1.13 in.)
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Active Loudspeaker System User’s Guide
Table 3 Performance Specifications
Specification Value
Output power 6W RMS per channel
Input sensitivity 1.5 vrms @ Rs 25 ohms
Frequency range 180 Hz - 20 kHz
Amplifier distortion 1% THD maximum
Transducers 3-in. full range driver
2-in. tweeter
Maximum acoustic output > 90 dB @ 1 kHz, 1m, both speakers driven
Input impedance 150 ohms
Table 4 Power Specifications
Specification Value
Polarity
Power output 18.5 Vdc @ 1.5A
Maximum power consumption 28W (VA)
Power input North America: 110V
Europe: 220V-240V
Japan: 100V
United Kingdom: 240V
Magnetic flux leakage <50 mGauss @ 2 cm
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