STK Professional Audio SPM-122AP, Owner'S Manual, Page: 3 / 12

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SPM-122AP/152AP/155AP
Table Of Contents
1 Important Safety Instructions................................................ 2
2 Introduction............................................................................. 3
3 Panel Description.................................................................... 4-5
4 Placement Tips & Hum........................................................... 6
5 Block Diagram......................................................................... 7
6 Specifications......................................................................... 8
Introduction
Thank you for choosing STK sound reinforcement speaker systems.
STK active speakers are constituted two passive system and two active systems.
Each model is designed for capable of extremely high sound pressure levels, and to give you
the best performance of any loud speaker in its class and price range.
Recent developments include an improved constant directivity horn for better off-axis response
in the high frequency range.
It has built in fly points for hanging, and a socket in the bottom for mounting on a tripod stand.
The asymmetrical trapezoidal design of the cabinet makes it easy to use as a floor wedge for
stage monitor systems.
- The crossover
The acoustic sum of the two drive responses is unity at the crossover frequency,
resulting in perfect power response.
- The Active power amplifier
The internal power amplifier is designed for receive the correct frequency range for driver
and speaker loud impedances. So they can provide maximum acoustic output from the
speaker, yet minimize the danger of speaker damage due to over driving a lesser amplifier.