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Summary of Contents for APART Champ - 4
- Page 1 MANUAL MANUAL Champ - 4 Professional quad power amplifier INFO@APART-AUDIO.COM...
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Page 2: Safety First
Do not drive the inputs with a signal level higher than that required to drive equipment to full output. • D o not run the output of any amplifier back into another input. • Do not ground the red output terminal, never connect a red output terminal to another red output terminal. • I n case of mal-function this device should be serviced by qualified service personnel only. WWW.APART-AUDIO.COM... -
Page 3: Manual Contents
S elf-supporting low resonance frame. Torsion free front and side panel construction with integrated heatsink assembly. • S olid aluminum brushed front panel with removable 19” brackets and handles for use in a rack, no additional support needed. Without the 19” brackets it will be a standalone unit in high quality audio systems. • High power toroidal transformer. • Low impedance power supply for improved dynamic response. • Solid speaker binding posts. • 4 sets of banana screw plugs included. INFO@APART-AUDIO.COM... -
Page 4: Inputs And Outputs
8) C lip led channel 2: this led lights up whenever the amplifier clips. This is a warning sign: you are pushing things a little too far or you are overloading the amp. Reduce the input level by a few dB so that this led never lights up anymore ! Don’t ignore this ! 9) V olume potmeter channel 2: use this potmeter to preset the volume. In bridge mode, this potmeter has no function. WWW.APART-AUDIO.COM... - Page 5 Possible causes can be : amplifier error or DC on the output, amplifier overheat or transformer* overheat. In such cases, remove the error condition or overload and wait until the unit has cooled down before powering on again. *In case the transformer is overheated, it may take a long time before the amplifier has cooled down sufficiently. In such cases, you may have overloaded the amplifier too much. Power off the amplifier immediately, correct the error and wait until the amplifier has cooled down. INFO@APART-AUDIO.COM...
- Page 6 Remove the protective cover from the middle of the red/black binding post in case you want to use banana plugs. For bridge mode applications, you MUST use the red binding posts only: channel 2 red plug is bridge mode negative speaker connector. WWW.APART-AUDIO.COM...
- Page 7 For bridge mode applications, you MUST use the red binding posts only: channel 1 red plug is bridge mode positive speaker connector. 11. With this switch, you can acivate/deactivate the integrated subwoofer filter circuitry. Standard crossover frequency is lowpass at 100 Hz. The position marked ‘AP’ has been optimized for use with optionally available APart-audio passive subwoofers. 12. Mode switch : enables to switch to normal 2 channel stereo operation, 2 channel mixed (mono) operation or single channel bridge mode. In case of bridge mode, only the channel 1 volume control is used. This is indicated by the bridge led on the front panel. 13. Channel 2 unbalanced input on cinch connectors: use the top or bottom cinch connector to apply an unbalanced signal on channel 2. These connectors are wired in parallel, this means you can use the second...
- Page 8 Ground loops are often created by connecting tuners to cable distribution sockets. Always use a RF isolating transformer whenever there is a cable signal tuner or digital TV tuner in the audio path! WWW.APART-AUDIO.COM...
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Page 9: Stand Alone Use
4. Stand alone use It is possible to integrate Champ-4 in a high quality audio chain. In order to adapt the front panel dimensions to the dimensions of other equipment, it is possible to remove the 19” brackets and handles for an even more sleek and refined look. Remove the two screws marked in red circles and slide off the handles. INFO@APART-AUDIO.COM... -
Page 10: General Technical Specifications
DC, clip, overcurrent, short-circuit Active filter channel 1 and 2 ‘100’ position lowpass at 100Hz/12 dB/oct Active filter channel 1 and 2 ‘AP’ position APart-audio specific filter characteristic optimized for APart-audio passive subs Active filter channels 3 and 4 highpass at 100Hz/12 dB/oct Temperature protection 90°C/ch + transformer 105°C... -
Page 11: Physical Specifications
This warranty is valid only for the original end-user and cannot be transferred. During the warranty period APart-Audio orone of its authorized service partners shall either repair or replace any product, free of charge, that proves to be defective on inspection by APart-Audio or its authorized service representative. - Page 12 Send your ideas or suggestions to suggestions@apart-audio.com Company names, product names, and names of formats etc. are the trademarks or registered trademarks of their respective owners. © 2009 APart-Audio specifications subject to change without notice. CHAMP-4 is developed by Audioprof nv Lanteernhofstraat 90...
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