Alesis iO4 Service Manual page 5

T O P P A N E L F E A T U R E S T O P P A N E L F E A T U R E S
T O P P A N E L F E A T U R E S T O P P A N E L F E A T U R E S
1. MIC INPUT – Connect a microphone to this
input with an XLR cable.
2. GUITAR / LINE INPUT –Connect a line-level
device or guitar to this input with a 1/4" cable.
3. INSERT – The insert jack allows you to insert a
compressor, EQ, or any other signal processor in
between the iO4's preamplifier and A/D converter.
4. GAIN – Adjusts the channel audio gain level.
5. MIC/LINE/GUITAR SWITCH –When this switch
is in the "GUITAR" position, the channel will serve
as a highimpedance input for connecting guitar or
bass instruments. When the switch is in the "MIC/LINE"
position, the channel will accept mic or line-level signals.
6 . 6 . 6 . 6 . USB LED – – Lights up when a USB connection has
– –
been established with your computer.
7. MIDI IN LED – Flashes whenever MIDI data is received
from an external MIDI device.
8. MIDI OUT LED – Flashes whenever MIDI data is sent
out of the iO4.
9. POWER LED – Lights up when unit is powered on.
10. MONO / STEREO – Adjusts the headphone mix and
main mix for mono or stereo operation.
11. MONITOR MIX – Blend in any amount of zero-latency
signal from your inputs with the output of your computer.
12. PHANTOM POWER SWITCH – Individual toggle
switches activate and deactivate phantom power for
channels 1+2 and channels 3+4. When activated,
phantom power supplies +48V to the XLR mic inputs.
Please note that most dynamic microphones do not
require phantom power, while most condenser
microphones do. Consult your microphone's
documentation to find out whether it needs phantom
power.
13. PHANTOM POWER LED – Lights up when phantom
power is engaged.
14. MAIN VOLUME – Adjusts the signal volume going to
the MAIN OUTPUTS.
15. CHANNEL 1/2 VOLUME METER – Displays the signal
level for input channels 1 and 2.
16. CHANNEL 3/4 VOLUME METER – Displays the signal
level for input channels 3 and 4.
SERVICE MANUAL
17. HEADPHONE VOLUME – Adjusts the volume level of
the headphone output.
18. HEADPHONE MONITOR MIX – Adjust this switch to
monitor the USB OUTPUT (channels 1 and 2),USB
(channels 3 and 4), or the direct mix of 4 input
OUTPUT
channels:channels 1 and 3 in the left headphone output
and channels 2 and 4 in the right headphone output and
the USB output.
R E A R P A N E L F E A T U R E S R E A R P A N E L F E A T U R E S
R E A R P A N E L F E A T U R E S R E A R P A N E L F E A T U R E S
19. HEADPHONES – Connect your 1/4" headphones to
this output.
20. OUTPUTS – Use standard 1/4" cables to connect these
outputs to a mixer, speakers, or an amplifier system.
The level of these outputs is controlled by the MAIN
VOLUME knob.
21. MIDI OUT – Use a standard five-pin MIDI cable to
connect this output to the MIDI IN of an external MIDI
device.
22. MIDI IN – Use a standard five-pin MIDI cable to connect
this input to the MIDI OUT of an external MIDI device.
23. 16/24 BIT MODE – When the switch is set to 24 bit, you
can use inputs 1-2 and outputs 1-2. When the switch is
set to 16 bit, you can use channel inputs 1-4 and outputs
1-4.
24. USB PORT – Use the included USB cable to connect
the iO4 to a computer. iO4 requires a USB 2.0
connection. Note that the iO4 is not USB bus powered.
25. POWER CONNECTOR – Plug the included AC adapter
here (6v DC 1A)
26. POWER SWITCH – Turns the iO4's on/off.
S Y S T E M R E Q U I R E M E N T S S Y S T E M R E Q U I R E M E N T S S Y S T E M R E Q U I R E M E N T S S Y S T E M R E Q U I R E M E N T S
S S S S PECIFICATIONS PECIFICATIONS
PECIFICATIONS PECIFICATIONS
SAMPLE RATE:
BIT RATE:
POWER SUPPLY:
DIMENSIONS (L x W x H): 8.75" x 6" x 1.6"
WEIGHT:
MODEL:
iO4
44.1/48k
16/24 bit
6V DC, 1A
(222.3mm x 152.3mm x 39mm)
1.1lbs(0.50kg)