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Disclaimer: The information in this manual has been carefully checked and is believed to be accurate at the time of publication. However, no responsibility is taken by us for inaccuracies, errors or omissions nor any liability assumed for any loss or damage resulting either directly or indirectly from use of the information contained within it. HEAD OFFICE AMS NEVE LTD • BILLINGTON ROAD • BURNLEY LANCS BB11 5UB • ENGLAND TELEPHONE: +44 (0) 1282 457011 • FAX: +44 (0) 1282 417282 LONDON OFFICE TELEPHONE: +44 (0) 20 7916 2828 • FAX: +44 (0) 20 7916 2827 NORTH AMERICAN OFFICES AMS NEVE INC., NEW YORK TEL: +1 (212) 965 1400 • FAX: +1 (212) 965 9306 AMS NEVE INC., HOLLYWOOD TEL: +1 (818) 753 8789 • FAX: +1 (818) 623 4839 e-mail: info@ams-neve.com Issue 2 8051 5.1 Compressor User Guide Contents Page ii Introduction 1 Dimensions 2 Rack Mounting and Cooling 2 Power Requirements 2 Mains Supply 2 Rear Panel Connectors 3 Compressor Controls 4 LFE Filter (Filter to Channel) 4 Bypass 5 Sidechain Link 6 Sidechain Filter 6 Control Link 7 SC Trims and Threshold 8 EXT Control 9 Threshold 10 Gain Makeup 10 Ratio 10 Attack 11 Recovery 11 Gain Reduction Meters 11 Key Input 12 Key Filter 12 Bias Control 12 Output Level 12 Power 12 Mastering Compressor Controls (AM5292) 13 8051 Compressor -88R(S) Console mounted 14 I/O Wiring (AM5052 & AM5265) 15 Specifications 16 8051 Block Diagram 17 Issue 2 8051 5.1 Compressor User Guide Introduction The 8051 is an analogue compressor that provides six transformer balanced audio paths complemented by two sidechains and a key input. Input and output to the sidechains is assignable to and from the six channels. Assignable LFE filters on the input and sidechains along with the key input provide integrated bass management. Flexible sidechain routing, trimming and filtering make this a powerful and responsive tool for surround mixing. The 8051 uses the same feedback topology as the 33609 compressor and includes the same transformers, diode-bridge gain control and discrete power amplifiers in the audio path. 8051 5.1 Compressor Page 1 Issue 2 8051 5.1 Compressor User Guide Dimensions Units U Depth mm (inches) Height mm (inches) Approx. Weight kg (lbs) 8051 Compressor (AM4851 and AM5292) not including mains plug 3 500 (20) 135 (5.25) 10.5 (23) Rack Mounting and Cooling The rack units should be installed in a 19" cabinet with access to the front and rear. No specific air conditioning is required for the racks, provided that there is a free flow of air through the rack from front to back, and that the ambient air is maintained below 30 degrees centigrade. Therefore the racks may be stacked. Power Requirements 8051 Units Rated Voltage 100-250V AC Rated Frequency 47-63 Hz Rated Current .25A at 250V Primary Protection Fuse: Operating Voltage 250/110V Fuse Rating and Type T1.6A/T1.6A A/S Ceramic Location Rear Panel IEC Mains Connector Mains Supply The power supply unit is a universal input type therefore no mains operating voltage setting is required. The CH (chassis) and 0V are linked externally. See the rear panel layout for AM4851 & AM5292. Page 2 Issue 2 8051 5.1 Compressor User Guide Rear Panel Connectors . Mating connectors are not supplied with these units. PUSHPUSHPUSHPUSHPUSHPUSHPUSHINPUT1OUTPUT1OUTPUT2OUTPUT3OUTPUT4OUTPUT5OUTPUT6INPUT2INPUT3INPUT4INPUT5INPUT6KEYINPUTCONTROLVOLTAGEI/OPLEASESEEMANUALCHASSISINTERNAL0VFUSE1.6AA/SCERAMICINPUTVOLTAGE100-250VACINPUTFREQUENCY47-63HzWARNINGDISCONNECTMAINSLEADTOISOLATEUNIT. NOUSERSERVICEABLEPARTSINSIDEHAZARDOUSVOLTAGESINSIDEREFERTOMANUALS CONTROL VOLTAGE I/O -15 Pin D-Type KEY INPUT -XLR Socket INPUT 1-6 -XLR Socket OUTPUT 1-6 -XLR Plug . These connectors apply to both the Standard and Mastering Compressor (AM4851 & AM5292). . For I/O wiring on 88R(S) console mounted compressors (AM5052 & AM5265) see page 15 . Page 3 Issue 2 8051 5.1 Compressor User Guide Compressor Controls 111IN/OUTIN/OUTEXTACTRLEXTBCTRL222333444555666AABBAABBAABBAABBAABBABB123456123456123456123456AOUTPUTLEVELdBFILTER TO CHANNEL CONTROL LINK SIDECHAIN LINK SIDECHAIN FILTER BYPASS SC TRIMS dB 10010012012080803 1/2 4 5/6 00001515151515151515Neve055A B A/ B BIAS 0POWERKEY/PAB100Hz8dB401216208dB40121620THRESHOLDdBuTHRESHOLDdBuTHRESHOLDdBuMAKE-UPGAINdBMAKE-UPGAINdBRATIORATIOATTACKATTACKRECOVERYRECOVERYGAINREDUCTIONGAINREDUCTIONAB1010+20+202m2m4ms4ms6ms6ms8ms8ms16ms16ms202020+16+16+161511512121888888888812121212121212121616161616444444444400000313141416161maxmax1s1s2s2s4s4s8815s15s33SIDECHAINSELIN/OUT8051MULTI-CHANNELCOMPRESSORDISCRETEMSTHzHzM LFE Filter (Filter to Channel) A 12dB/octave low-pass filter can be assigned to any one channel. This filter is applied directly to the input before the relay-bypass point, and its -3dB frequency is selectable from 80, 100 or 120Hz. Page 4 111IN/OUTIN/OUTEXTACTRLEXTBCTRL222333444555666AABBAABBAABBAABBAABBABB123456123456123456123456AFILTER TO CHANNEL CONTROL LINK SIDECHAIN LINK SIDECHAIN FILTER BYPASS SC TRIMS dB 10010012012080803 ...