Operating Manual - Powerflex
11.2 | Distorted Sound | 11.3 | Hum or Buzz Noise |
1.) Clip LED is flashing regularly
Amplifier is being overdriven. Turn down the in- put level control, or reduce the output level from the sig- nal source.
2.) Clip LED is not flashing at all
Amplifier input signal may be exceeding input headroom, which is greater than +12dBu, or 3.4V rms (measured using continuous 1kHz sine wave). Incoming signal level higher than +12.8 dBu will cause distortion in the amplifier. Turning down the input level controls will not eliminate distortion if the input headroom is exceeded. Turn down the output level of the device driving the am- plifier instead.
Additionally, an input signal may already be dis- torted before it gets to the amp. Check to see if a piece of equipment in the signal chain before the amp is clipping. For best performance, the amplifier should be operated with input levels fully CW. Also check for damaged speaker drivers that could cause distorted sound.
Be sure that the power cord’s
Hum is usually caused by ground currents flow- ing between different pieces of equipment. Ground cur- rents can be minimized by using a single point AC ground for the sound system, and by using balanced connections with quality cable throughout the audio path.
Buzz, as well as certain audible high frequency tones, can be caused by environmental emissions such as lighting dimmers, neon lights, or computer equipment. Use balanced connections, and try moving the amplifier, wir- ing, lighting, or other equipment to different locations to isolate the source of the noise.
Sections 3.3, 5.3, 7.1, and 7.2 further discuss is- sues related to grounding and noise problems.
12.POWERFLEX DIMENSIONS
16.94"
2.25"
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1.25"
18.5"
5.19" | 4.75" | 2.25" |
Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 | Channel 6 |
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| Po wer | Powerflex 6250 |
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19"
14
