Chapter 1: Crown Amplifiers | 13 |
Figure 1.18
Connector Assembly: Bushing onto Connector Housing Assembly
Figure 1.19
Connecting the Speakon plug to the mating connector
6. Slide the bushing along the cable and screw onto the end of the connector combination as shown in Figure 1.18. Note that the bushing features a special lock- ing construction which will prevent disassembly of the NL4FC con- nector once this cap is tightened into place. Before tightening, you may want to test the connector in a live system to make sure it has been assembled properly.
To connect the Speakon plug into the mating connector on the speaker, line up the notches between the insert and the mating connector, then insert the plug and turn one
Figure 1.20
Series Speaker Impedances
Figure 1.21
Parallel Speaker Impedances
1.3.2 Amplifier Load Impedance
A major consideration when matching amplifi ers with speakers is the resulting impedance presented to the amplifi er when speakers are connected to the output. The impedance of the load, in part, determines how much power the amplifi er will produce. Also, too low of impedance can cause the amplifi er to
overheat.
Impedance is much like resis- tance, except impedance changes with frequency. Imped- ance and resistance are both measured in ohms. To under- stand the effect of impedance in an electrical circuit, consider the following analogy: a wire is much like a water pipe. Elec- trical current is like the water
fl owing through the pipe. Imped- ance’s role is that of the valve. The valve resists or impedes (hence the terms) the fl ow of water through the pipe. If the valve is opened (less imped- ance), water fl ows freely. As the valve is turned toward the closed position (more imped- ance), the fl ow of water slows. As the amplifi er drives lower impedances, it produces more current, thus more power.
Amplifier Application Guide
