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Table of Contents: SPIDER Two Channel Class A Transformerless Valve EQ 1/Introduction 2/Features 3/Functions and Dials 4/Inputs and Outputs 5/Operation 6/General Maintenance 7/Specifications...
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1. Introduction The Sebatron Spider EQ is a high quality Two Channel Class A Transformerless Valve Equalizer housed in a 2U rack chassis designed for tracking, mixing or mastering purposes. Both channels of the Spider EQ feature upper and lower shelf bands each with two selectable frequencies and two mid bell bands each with four selectable frequencies to suit your audio equalization requirements.
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2. Features SPIDER EQ -Full relay driven bypass -Full relay driven bypass -Rugged discrete solid-state Class A input/output buffering stages -Rugged discrete solid-state Class A input/output buffering stages -Two twin-triode valves running on high voltage and DC filament -Two twin-triode valves running on high voltage and DC filament...
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3. Functions and Dials The Spider EQ is equipt with two High shelf frequencies and two Low shelf frequencies. Both shelf slopes are 6db per octave. The Low shelf adds weight and width to a mix and the High shelf opens up the response and adds clarity.
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3. Functions and Dials The two mid bands each feature a choice of four frequencies. The Low-Mid band has a wide bell ( or low ‘Q’ ) to facilitate wide boosts or cuts in the lower midrange frequencies. The High-Mid band has a narrower bell ( or high ‘Q’ ) to facilitate thinner boosts or cuts in the higher midrange frequencies.
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4. Inputs and Outputs Channel 2 Output/Input Channel 1 Output/Input Balanced XLR Balanced XLR The Sebatron Spider is equipt with electronically balanced XLR inputs and outputs. All XLR inputs and outputs are : pin 1=shield, pin 2=hot (+), pin 3=cold (-).
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IEC Mains Power Input Voltage Selector Switch The Sebatron Spider EQ can be switched between different global mains voltages via the Voltage Selector Switch on the back of the unit. This switch is usually set in the factory for the appropriate voltage that the unit is destined for, however, in cases of resale etc.
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4.Proceed to adjust Equalizser bands to taste keeping in mind to adjust the output level control to maintain the output signal in the desired processing range and from clipping the next unit the Spider EQ is plugged into...
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6. General Maintenance Valves and valve type : The Sebatron Spider EQ is fitted with two J.J 12AT7 ( ecc81 ) twin triode valves . We recommend using J.J valves where possible as they are the most consistent valve being manufactured at the moment.
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2 to 4 minutes. General Use : The Sebatron Spider EQ comes stocked with brand new J.J valves. We use J.J valves because of low microphony, consistency and of course the sound which is generally regarded as neutral.
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Modular P.C.B : Easy servicing and modifications Topology : Discrete and Class A Valve and Solid State signal path running on +300V and +60V rails respectively Circuitry : Class A Discrete and low noise Two Dual Triode 12AT7/ecc81 and High Voltage Silicon Transistors Service/Repair queries: sebatron@sebatron.com...
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