ENGLISH
OPERATION MANUAL
JB SYSTEMS
®
3/24
PSA-series
FUNCTIONS AMPLIFIER
This is a combined user manual for both PSA-12 and PSA-15. The control panel of the PSA-15 is shown,
please note that some of the controls/inputs are not are not available on the PSA-12.
1. MIC 1 INPUT:
This input accepts both
balanced and unbalanced microphones.
You can use both ¼”jack and male 3pin-
XLR connectors.
Attention:
To prevent damage to the
tweeters of your speaker cabinet, please
set the micro input level (2 to zero
before you connect the microphone.
Once connected you can turn the level
up to the desired level.
2. MIC 1 LEVEL:
Used to set the input
level of the microphone input (1).
3. MIC 2 INPUT:
(only available on PSA-
15) same functionality as MIC 1 input (1)
4. MIC 2 LEVEL:
(only available on PSA-
15) same functionality as MIC 1 level (2)
5. LINE LEVEL:
Used to set the input level
of the line input (6). Always set the
control to minimum before connecting
any audio source.
6. LINE INPUT:
This input accepts both
balanced (3pin-XLR) and unbalanced
(RCA, cinch) line level audio signals like
for example: CD-player, tuner, MP3-
player, ...
Attention:
although the cinch input is
stereo, the signal will be converted to
mono inside the speaker.
7. MASTER LEVEL:
Used to set the
overall volume of the amplifier. Always
set the master level to zero when you
switch the cabinet on, after this turn up
the volume to the desired level.
8. TONE CONTROLS:
Used to adjust the
treble and bass of the master signal.
9. LINE OUTPUT:
This balanced output
(stereo jack 6.3mm and 3pin-XLR) makes it possible to connect several speaker cabinets together, the
line output is NOT influenced by the settings for the master level (7) and tone controls (8).
10. POWER LED:
indicates that the amplifier is switched on, on the front panel you will find a second
power led.
11. CLIP LED:
is lit when the amplifier is clipping (close to distortion). You are working on the limits of the
amplifier, please turn the volume a little down.
12. VOLTAGE SELECTOR:
used to select the mains input voltage, 115Vac or 230Vac. Check this switch
BEFORE you connect the unit to the mains.
13. MAINS INPUT:
Mains input with IEC socket and integrated fuse holder, connect the supplied mains
cable here.
14. POWER SWITCH:
Used to switch the internal amplifier on/off. The Power led (10) is lit while the
cabinet is switched on.
