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Aurora Audio Sidecar Manual

10 channel 2 output
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AURORA AUDIO INTERNATIONAL
6850 Vineland Avenue, Unit E
North Hollywood, CA 91605
Phone: 818 358 4328 Fax: 818 358 4320
info@auroraaudio.net
Email:
www.auroraaudio.net
Website:
10 Channel 2 Output Aurora Sidecar Handbook
Page Index:
Page 2 – Introduction
Page 3 – Configuring the Power Supply
(Read this first!)
Page 4 – Aurora Sidecar Block Diagram
Page 5 – Connecting To The Aurora Sidecar
Page 6 – The DI input And Correct Gain Structure
Page 7 – The Four-Band Equalizer
Page 8 – Bus Sends, Phase, and Phantom Power Controls
Page 9 – Mixing To The Stereo Mix Busses
Page 10 – International dBFS Levels
Page 11 – Aurora Sidecar Maintenance (Removing Modules)
Page 12 – Aurora Sidecar Maintenance (Channel item details)
Page 13 – Aurora Sidecar Channel Wiring Diagram
Page 14 – Bus and Stereo O/P wiring diagram
Page 15– Specifications
Page 16 – Warranty details
Page 1

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Summary of Contents for Aurora Audio Sidecar

  • Page 1 Page 10 – International dBFS Levels Page 11 – Aurora Sidecar Maintenance (Removing Modules) Page 12 – Aurora Sidecar Maintenance (Channel item details) Page 13 – Aurora Sidecar Channel Wiring Diagram Page 14 – Bus and Stereo O/P wiring diagram Page 15–...

  • Page 2: Introduction

    The Aurora Sidecar is a large and professional piece of equipment. As such, it will need to be maintained. The better it is maintained, the better service you will have for a longer period of time.
  • Page 3 The power supply has both input and output fuses to give maximum protection to both the power supply and the sidecar. It would be very unusual for either the 24v or 48v labeled fuses to blow and this would most likely be caused by a power cable being crushed by a door or wheeling something very heavy over it.

  • Page 4: Aurora Sidecar Block Diagram

    Aurora Sidecar Block Diagram: Page 4...
  • Page 5 Connecting Your Equipment To The Aurora Sidecar: As you can see from the block diagram, all rear panel inputs and outputs are XLR connections and are transformer balanced and floating. It is important to take advantage of the transformer's isolation from grounds as the transformer could not care less...
  • Page 6 The D.I Input On The Front Of The Channel Modules: If you plug a mono source, like a guitar, bass, or synthesizer into the 1/4” jack on an Aurora Sidecar channel, it will cut the XLR source to the channel and select this DI source automatically.

  • Page 7: The Four-Band Equalizer

    The Four-Band Equalizer: The four-band equalizer, like the rest of the Aurora Sidecar, is all discrete transistor Class A circuitry. The equalizer is selected by pressing the red “EQ” button at the bottom of the channel. With the pots in the center detent position the gain should not change significantly when the equalizer is selected or deselected.
  • Page 8 Bus Sends, Pan-Pot Controls, And Cut Switch: The pan-pot is only in line when both Left and Right bus assign buttons are pressed. The green “Pan” LED will illuminate to confirm that the pan-pot is in line and the pan control can now be turned to place the sound in the required stereo image.

  • Page 9: Mixing To The Stereo Mix Busses

    This gives the Aurora Sidecar the extra “iron” in the mix circuit path to produce a sound unobtainable with a virtual earth, current mix into an IC operational amplifier.

  • Page 10: International Dbfs Levels

    10.Belgium VRT: 0dB (VRT Ref.) = +6dBu ; -9dBFS = 0dB (VRT Ref.) ; 0dBFS = +15dBu. 0VU on the Aurora Sidecar VU meters is +4dBu (1.228v ac) and normally -18dBFS on the meters of the digital converters. Page 10...
  • Page 11 Aurora Sidecar Maintenance: The channel section of the Aurora Sidecar is modular and modules can be easily removed and replaced..To remove the module, undo the two captive thrumb-screws and use them to pull the channel module from its connector and out of the Sidecar frame.
  • Page 12 The Aurora Sidecar is robustly built out of all steel frame components and well engineered electronic circuitry. The Aurora Sidecar can operate with channels removed but the bus level will rise marginally as there will be less loading on the mix busses. An increase in 0.5dB with one module removed and 1.0dB with two modules removed shows the small margin...

  • Page 13: Aurora Sidecar Channel Wiring Diagram

    Aurora Sidecar Channel Wiring Diagram: Page 13...
  • Page 14 Aurora Sidecar Bus and Stereo O/P Wiring: Page 14...
  • Page 15 Specifications: Channels Gain :- -10dB to +80dB on the input sensitivity switch plus another 10dB in the fader. Input Impedance :- 1.2Kohm (XLR I/P), 10Mohm (DI I/P) Output Impedance :- < 50 ohms balanced VU Meter range :- Standard VU points from -20VU to +3VU where 0VU = +4dBu = 1.228 vac.

  • Page 16: Vineland Avenue, Unit E

    Only skilled technicians should repair the Aurora Sidecar. Please contact Aurora Audio for technical advice. Aurora Audio is committed to helping you get best use out of the Aurora Sidecar. ROHS Directives The RoHS Directive stands for "the restriction of the use of certain...
  • Page 17 This information is only relevant if a non-insert Aurora Sidecar needs to be retro converted to the insert option.
  • Page 18 6. Applying a +4dBu input balanced signal to that cable XLR, adjust the lower trim potentiometer to achieve a +4dBu level coming out of the channel output XLR. 7. If both TRS jack to XLR cables are removed, the Sidecar should still be unity gain from channel input XLR to channel output XLR.
  • Page 19 6. Applying a +4dBu input signal to that cable XLR, adjust the lower trim potentiometer to achieve a +4dBu level coming out of the Stereo Output XLR. 7. If both TRS jack to XLR cables are removed, the Sidecar should still be unity gain from channel input XLR to Stereo output left XLR.
  • Page 20 Addendum #2 :- Using the Monitor Panel. An optional feature for the Audio Sidecar, which can be factory or distributor retro fitted, is the new monitor panel that turns the Sidecar into a small Console. These involve fitting a new, hinged, rear panel that contains the insert circuit boards and the XLRs for Playback Inputs and Monitor Outputs.
  • Page 21 See graph below for output levels versus headphone impedance. Three illumination push buttons are provided for monitor options :- 1. Cut (Red switch) fully mutes both stereo paths so no signal reaches the monitor speakers. 2. Alt LS (Green switch) switches between two sets of monitor outputs. 3.

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