Filter
Top Products
4
V. WARRANTY AND DISCLAIMERS
Disclaimer
QSC Audio Products, Inc. is not liable for any damage to speakers, amplifiers, or any other equipment that is caused by negligence
or improper installation and/or use of the SPA-3.
Product Warranty
QSC Audio Products, Inc. guarantees the SPA-3 to be free from defective material and/or workmanship for a period of three years
from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs
under normal installation and use—provided the unit is returned to our factory via prepaid transportation with proof of purchase
(sales receipt). This warranty provides that examination of the returned product must disclose, in our judgment, a manufacturing
defect. This warranty does not extend to any product which has been subject to misuse, neglect, accident, improper installation,
or where the date code has been removed or defaced.
CH 1 INPUT CH 2 INPUT
SIGNAL
CH 1
CH 2
300 mA
15 V
EXT. POWER
SPA-3
STEREO PRECISION ATTENUATOR
SHIFT DOWN
UPCH 1 ATTENUATION (dB) CH 2 ATTENUATION (dB)UP
SHIFT
INPUT
TRANSFORMER
ACCESSORY
SG-000005-AC
XF-1 OPTIONAL
INCR. SIGNAL = UP
DECR. SIGNAL = DOWN
SCROLL UP = press & hold UP
LOCK/UNLOCK channel = DOWN
SCROLL DOWN = press & hold DOWN
other SHIFT +
INPUT
TRANSFORMER
ACCESSORY
SG-000005-AC
XF-1 OPTIONAL
BYPASS / ENGAGE = SHIFT+ UP
other SHIFT +MUTE/UNMUTE =UP
0.5/1dBTOGGLE= SHIFT +DOWN
QSC AUDIO PRODUCTS INC.
COSTA MESA, CA USA
DOWN
Up button
Down button
Shift button
Attenuation display
Signal indicators
External DC power jack
Inputs
noitarepO sserP
)#lennahC=n(
)noitaunettaesaerced(langisesaercnI
PU
n
)llorcs(langisesaercnIdloH PU
n
)noitaunettaesaercni(langisesaerceD
NWOD
n
)llorcs(langisesaerceDdloH NWOD
n
)elggot(noitaunettaegagne/ssapyB
TFIHS
n
+ PU
n
)Bd5.0ro1(elggotpetstnemercnI
TFIHS
n
+ NWOD
n
noisreverawmrifyalpsiD
1TFIHS + 2TFIHS
1lennahCetuM
2TFIHS + 1PU
2lennahCetuM
1TFIHS + 2PU
1lennahCkcoL
2TFIHS + 1NWOD
2lennahCkcoL
1TFIHS + 2NWOD
IV. OPERATION
The table at left shows the button sequences for all possible operations on the
SPA-3.
The adjustable range of attenuation on each channel is 0 (no attenuation) to
32 dB. The attenuation changes in real time as you make the adjustments. Half-
decibel settings are indicated by the right decimal point of the two-digit
display. For example, a display of indicates a setting of 18 dB of attenuation,
while
would indicate 18.5 dB. Even when its DC power is removed, the SPA-3
will retain its settings in non-volatile memory.
The buttons, displays, and other features of the SPA-3