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Rupert Neve Designs Portico 5043 User Manual
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Rupert Neve Designs Portico 5043 User Manual

Two channel compressor limiter
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Summary of Contents for Rupert Neve Designs Portico 5043

  • Page 2 However here are some reminders: The Portico 5043 dissipates about 9 watts, which means that it will get warm in use. The heat generated is radiated through the case work and by convection through the ventilation holes.
  • Page 3 INTRODUCTION In a traditional console large, bi-polar regulated supplies were used, necessarily having a shared common 0 "ground" wire. Crosstalk between modules resulted, often accompanied by R.F. interference due to the unbalanced loop "antennas" that were inevitably present. This interference, in some cases, could actually be heard, but even at low levels below audibility there was a potential intermodulation with the desired signal.
  • Page 4 FEATURE LIST 5043 Compressor/Limiter Duo - Front Panel RATIO Changes the amount Changes the operation of gain reduction above from FeedFoward the set threshold to FeedBack Link Connects the DC control Buss Input line to other channel Toggles between Line Compression circuits and to TRS jack on rear and Mixing Buss inputs...
  • Page 5 INTRODUCTION A NOTE ON DISTORTION The human hearing system unconsciously perceives minute signals both within and well beyond the traditional audio frequency spectrum. When such frequencies that are not present in nature, such as high order harmonics produced by amplifier distortion, or by the presence of seemingly inaudible artifacts due to interference, or when those frequencies that are present in nature are missing, the human hearing system "reports"...

  • Page 6: General Description

    DESCRIPTION GENERAL DESCRIPTION The Rupert Neve Designs 5043 module is a half rack width, 1.75" (1U) module in the now well- known Portico™ style. The 5043 is ideal for both tracking and mixing applications with selectable Mixing Buss or Line inputs. The 5043 is an ideal choice for either standalone operation, or forming the core of a larger mixing system.
  • Page 7 DESCRIPTION THE CONTROL CHAIN: FEED FORWARD or FEED BACK If the V.C.A. Control voltage is taken from the 5043 input, (i.e. before the V.C.A.) the V.C.A. "knows" right away that a gain change is required and there is almost immediate response. This is known, logically, as a "Feed-Forward"...

  • Page 8: Principal Features

    FEATURES THE 5043 LINE AMPLIFIER The Portico™ 5043 consists of two identical Line Driving amplifiers having transformer balanced inputs and outputs. The sonic quality of these amplifiers is such that, by providing galvanic isolation, simple single-sided circuit topology, and freedom from grounding problems, they are capable of enhancing the sonic quality of many signal sources, especially those of digital origin.
  • Page 9 FEATURES THRESHOLD THRESHOLD control covers the range from below -30dB to +22dBu. When THRESHOLD is set at a low level with a fairly high RATIO, the amount of gain reduction will be considerable and it may be necessary to use some GAIN after the compressor to restore the apparent signal level.

  • Page 10: Composite Operation

    FEATURES BUSS INPUT BUTTON Routes the BUSS inputs to the compressor. Each of the "A" and "B" units has a choice of LINE or BUSS input. The LINE inputs are transformer-balanced bridging inputs. The BUSS inputs are configured as balanced and floating inputs that, when fed from a source impedance of 10,000 ohms, will produce unity gain, (Compressor-Limiter switched out) overall.
  • Page 11 FEATURES STEREO When the LINK push-button is engaged and the two channels, A and B, set to approximately the same values, GAIN control on both channels will be the same to preserve stereo balance, levels normally being controlled by the channel with the higher signal level. DUCKING When the LINK push-button is OU TP UT LE VE L...

  • Page 12: Specifications

    SPECIFICATIONS 5043 Duo Compressor Limiter Specifications Gain Range: Continuously variable from –6 dB to +20 dB. Threshold Range: Continuously variable from –36 dB to +22 dB. Ratio Range: Continuously variable from 1.1:1 to “Limit” (40:1). Attack Range: Continuously variable from 20mS to 75mS Release Range: Continuously variable from 100mS to 2.5 Seconds.
  • Page 13 BLOCK DIAGRAM...