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CROSSOVER SETTINGS
AND GAIN ADJUSTMENT
Your Polk Audio power amplifier needs to be adjusted carefully to achieve maximum performance. These are some guidelines to follow when
•For
•The crossover frequency control needs to be adjusted to suit your particular system. For subwoofer appli- cations, try and keep the setting low enough to prevent image smearing (you should not be able to hear male voices from the subwoofer) but not so low as to create a gap between the subwoofer and the
•The gain adjustment allows you to set proper signal match for clean, quiet amplifier operation. For
volume again. When you can listen to the music at or slightly above 3/4 on your head unit without audible distortion, slowly raise the gain of the amplifier until distortion is heard, then back off the gain until the distortion is not audible. This setting will allow you to reach full output with all but the quietest of source material, while avoiding excessive noise in the system.
NOTE: Polk amplifiers use a digital gain control with
a finite number of adjustment steps. A very small adjust- ment may not cause any audible change in level.
LED TUBE INSTALLATION (OPTIONAL)
These Polk Audio amplifiers have been designed with a custom heat sink that can accommodate two
1.Before installing the LED tubes, remove and discard the mounting feet from the VARAD LED tubes.
2.Slide each LED tube assembly into your Polk Audio amplifier heat sink. Ensure that the LEDs are facing out for optimal visibility. The wires from the LED tube assembly should be on the signal input end of the amplifier. The Black wire from the LED tube is ground and the Black/White wire from the LED tube is power.
3.Run the two wires from the tube assembly and connect them to the
NOTE: If the optional fan IS NOT being used, we recom- mend that the second LED tube be wired to this circuit. If the optional fan is being used, we recommend that the second LED tube be wired in parallel with the first LED tube.
ENGLISH
CEA SPECIFICATIONS
PA250.2 Power Output: 90 Watts RMS x 2 channels at 4 Ohms and ≤ 1% THD+N
Signal to Noise Ratio:
Additional Power: 125 Watts RMS x 2 channels at 2 Ohms and ≤ 1% THD+N
SPECIFICATIONS | PA250.2 | |
Dynamic Power Rating @ 2 Ohms | 200W x 2 | |
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RMS Continuous Power @ 2 Ohms2 | 125W x 2 | |
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RMS Continuous Power @ 4 Ohms1 | 90W x 2 | |
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RMS Continuous Power | 250W x 1 | |
Bridged 4 Ohms3 | ||
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Greater than 90 dB | ||
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Frequency Response | ||
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Damping Factor | Greater than 100 | |
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Crossover | Switchable high or low pass | |
12dB/octave, 100Hz | ||
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Bass Equalization | +8 dB, centered at 40Hz | |
(Variable or Fixed) | ||
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Input Impedance | 20K Ohms | |
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Input Sensitivity | Variable from | |
250 mV to 7.5 volts | ||
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Output Impedance | 2 to 8 Ohms, stereo | |
4 to 8 Ohms, bridged | ||
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Supply Voltage | 10 to 16 VDC | |
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Fusing and Power/Type | 30A | |
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Minimum Cable Requirements | #10 | |
(AWG) (Per amp, Trunk Mounted) | ||
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1RMS continuous power driven into 4 Ohms from 20 to 20,000 Hz @ 14.4VDC with less than 0.08% THD+N.
2 RMS continuous power driven into 2 Ohms from 20 to 20,000 Hz @ 14.4VDC with less than 0.15% THD+N.
3 RMS continuous power bridged into 4 Ohms from 20 to 20,000 Hz @ 14.4VDC with less than 0.15% THD+N.
12 P A 1 2 V A M P L I F I E R S |
| W W W . P O L K A U D I O . C O M / A M P S 13 |