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Redback A 2548 Operating Manual
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Redback A 2548 Operating Manual

4 channel mixer with usb output & effects
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www.altronics.com.au
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Operating Manual
A 2548 4 Channel Mixer With USB Output & Effects
Note: Please read this manual thoroughly to get the most out of the product and
ensure long-term, trouble-free use. Keep this manual for future reference.
www.redbackaudio.com.au

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Summary of Contents for Redback A 2548

  • Page 1 ® Operating Manual A 2548 4 Channel Mixer With USB Output & Effects Note: Please read this manual thoroughly to get the most out of the product and ensure long-term, trouble-free use. Keep this manual for future reference. www.redbackaudio.com.au...
  • Page 2 Introduction A perfect little mixer companion for your PC/laptop for home recording and podcasting. Measuring only 124mm wide it takes up very little desk space while still offering features found on mixers twice the size, such as fader level control, 3-band EQ and effects. The low noise mic preamp offers excellent performance for small home studios or use in the field as a secondary mixer.
  • Page 3 Controls and Functions Figure 1 1. CH1 MIC/LINE input (XLR/TRS combo socket, (BAL/UNBAL) 11. MAIN OUTPUT (Monitor) jacks (BAL/UNBAL) 2. CLIP LED / GAIN knob 12. PW power on LED 3. PAD -20dB switch 13. PHONES output jacks (6.35mm & 3.5mm) 4.
  • Page 4 Controls and Functions Figure 2 - Connection Example 1. CH1 MIC/LINE inputs (XLR/TRS combination socket, balanced / unbalanced) Connect to a microphone, an instrument or other audio device. This socket supports balanced / unbal- anced connections for both XLR and phone TRS plugs. 2.
  • Page 5 Controls and Functions Figure 3 5. LOW/MID/HIGH EQ (3-band for CH1) A responsive 3-band EQ provides inde- pendent controls for LOW/MID/HIGH frequency bands. The Low and High bands are shelving filters which operate on the low frequencies below 80Hz and the high frequencies above 12kHz respectively.
  • Page 6 Figure 4 - Mixer Block Diagram MIC to CH1 INPUT (HEADSET) PHANTOM POWER CLIP HIGH +6DB +48V GAIN -20dB MAIN_L MAIN_L MAIN_R MAIN_R MIC INPUT LINE INPUT FADER CH1 INPUT CH MIX_L LINE / INST-HI_Z MAIN_L MAIN_R CH MIX_R CH2 INST LEVEL CH3-CH4 INPUT LEVEL...
  • Page 7 LEVEL MUTE DIGITAL EFFECTS DELAY CLIP MAIN MIX_L MAIN LEFT MUTE MAIN MIX_R MAIN RIGHT MAIN OUTPUT LEVEL LEVEL PLAYBACK_L PHONES OUTPUT PHONES OUTPUT PHONES LEVEL IO INTERFACE PLAYBACK_R NPUT/OUTPUT PHONES (HEADSET) +48V VERTER...

  • Page 8: Phones Knob

    Controls and Functions 10. CH3-CH4 input line jacks (6.35mm or 1⁄ 4 ”, BAL/UNBAL) Connect line-level devices such as an electric keyboard or an audio playback device (CD, MiniDisc, USB Players etc). Use the L/Mono line-level jack on CH 3 for other instruments, etc. with mono output. In such cases, the sound input to the L/Mono jack is output from both the L channel and R channel.
  • Page 9 Controls and Functions 17. MAIN L/R knob/MUTE switch Use the knob to adjust the volume of audio signal sent to the powered speakers or a powered amplifier connected to the MAIN OUTPUT jacks (balanced / unbalanced). MUTE: Press to mute all audio output to the MAIN OUTPUT jacks.

  • Page 10: Specifications

    Specifications Specifications 4 Input Channel Functions Gain, -14~40dB PAD: -20dB CLIP +6dB (LED turns on when 3dB below clip ) CH1 MIC/LINE: XLR/TRS combination 1x Mono EQ LOW/MID/ HIGH: 80Hz, 2.5KHz, 12 KHz (+/-15dB) – includes MIC to CH1 Headset PHANTOM POWER: +48V LED Fader Level EFFECT: Digital Echo on CH1 (DELAY, LEVEL, MUTE)

  • Page 11: Handling And Maintenance

    Warning To avoid the possibility of malfunction/damage to the product, damage to data, or damage to other property, follow the notices below. Handling and Maintenance • Do not use the device in the vicinity of a TV, radio, stereo equipment, mobile phone or other electric devices that may generate electrical and RF noise.
  • Page 12 REDBACK® A 2548 4 Channel Mixer With USB Output & Effects Altronic Distributors warrants this product for 12 months from date of purchase from Altronics or its resellers to the consumer. If this item is part of an installation or another product, please contact the installer or supplier for your warranty.