Power Input
The AP-16+ is powered from 12 to 18 volts DC. DC power may be connected to via the 2.1mm power jack or
through the V+ and GND terminals located just above the power jack.
CAUTION
: Do not apply more than 18 volts DC to the power input; this is the maximum voltage
allowed by the amplifier circuitry. Note, too, that for maximum volume the AP-16+ should be
powered by 18 volts DC at 3 Amps.
Audio Outputs
The AP-16+ provides terminal outputs for 4
Ω
or 8
Ω
speakers. Be sure to select speakers of the appropriate
wattage to handle the output, and always used enclosed speakers for the best fidelity. When not using the
speaker output terminals you should rotate the speaker volume potentiometers fully counter-clockwise (lowest
setting). If more volume is required the AP-16+ also provides line-level outputs that can be connected to an
external, stereo amplifier.
CAUTION
: When working in close proximity to the AP-16+’s speakers be very mindful of the
volume settings – 20W per channel can be quite loud.
AP-16+ Audio Files
The AP-16+ plays PCM encoded, 16-bit, stereo WAV files at sample rates up to 44.1kHz. Monophonic files,
or those with a different bit depth, will need to be converted.
NOTE
: When converting files, especially from compressed formats (e.g., MP3), up-sampling is not
recommended as it can lead to audio artifacts in the form of clicks, pops, and noise in the up-
sampled file. It is best to maintain or even lower the sample rate when from compressed formats.
AP-16+ Audio Files - Manual Mode
The AP-16+ can work with up to 24 files in manual operation, as well as an optional “background” file that will
play between selections (if enabled).
AMBIENT.WAV
Background file that will play between other files when ambient loop switch (
) is set
to ON. For best results this should be a “loopable” file and generally be at a lower
level than other audio files.
Using the standard manual start inputs (see below) the AP-16+ can play any of 16 files, named SFX00.WAV
through SFX15.WAV. Note that the AUDIO SELECT switch (I) is hexadecimal-encoded using digits 0 through
9, and letters A through F for 10 through 15.
SFX00.WAV
Corresponds to manual input when AUDIO SELECT switch is in position 0.
SFX10.WAV
Corresponds to manual input when AUDIO SELECT switch is in position A.
SFX15.WAV
Corresponds to manual input when AUDIO SELECT switch is in position F.
The AP-16+ inventories SFX files on power-up; there is no requirement for all 16 SFX files to be present.
Using the auxiliary manual inputs (IN1..IN8) the AP-16+ can play any of eight files, named AUX01.WAV
through AUX08.WAV. Note that when the EN (audio stop enable) option switch is set to ON, IN8 will serve as
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