Specifications

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BooBox FlexMax FI-216 Operating Manual - page 13
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Amplified Speaker Outputs
About the Internal Amplifier
The FlexMax includes a 50 watt Class D stereo amplifier. This thing gets LOUD! If you start hearing the audio
cut out or sound distorted before your ears start to bleed, it’s likely that your power supply is too small. To take
full advantage of this amplifier, the power supply needs to be 24 volts and have at least 50 watts of power.
The amplifier uses efficient high frequency modulation techniques to amplify the sound to such a high level
without wasting loads of energy as heat. This is how we can fit it inside the FlexMax without needing the giant
heat sinks typically seen on amplifiers at this wattage. This technique does however create interference in the
form of high frequency noise. Not to worry, it doesn’t affect sound quality, it’s well beyond what humans can
hear. If you’d like to keep the FCC happy and cut down on this interference, it’s recommended to use shielded
speaker cables. Connect the shield to the GND pin on the BooBox.
Two Speaker Wiring Diagram
The most common setup. Use only 4 or 8 ohm speakers.
Four Speaker Wiring Diagrams
Four 8 ohm speakers can be connected in parallel. This appears as a single 4 ohm load on each speaker
output.