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Manual
Volume 2
Model 2602
Analog Dual-Channel Volume Controller
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Manual Volume 2, Model 2602 Version 1.0 – 5/2006 Designer: Wolfgang Neumann This user's guide contains a description of the product. It in no way repre- sents a guarantee of particular characteristics or results of use. The informa- tion in this document has been carefully compiled and verifi ed and, unless otherwise stated or agreed upon, correctly describes the product at the time of packaging with this document. Sound Performance Lab (SPL) continuously strives to improve its products and re
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Contents Introduction ............................................................................................... 4 Installation and Security Advices .............................................................. 5 Power Supply .............................................................................................. 5 Rear Panel .................................................................................................. 6 Power Supply, ON/Off Switching ............................
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Introduction The Volume Controller Volume 2 serves as a system-independent analog volume regulator in all areas of audio processing and playback, including • Stereo music production • Movie and video post production, video computer games production • Demanding hi-fi delity applications Complementing the fully equipped SPL Stereo Monitoring Controller (MTC 2381), the Volume 2 focuses exclusively on the highest possible quality in active volume control. Users who do not need additional monitori
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Installation and Security Advices Please Read this Important Note: Be very careful to check that the rear chassis power selection switch is set to the correct local line voltage position (either 230 or 115 volts) before using your machine! Before connecting any equipment make sure that any machine to be connected is turned off (on the Volume2 rear panel the power switch must be pushed down). Turning the Volume 2 on and off: The Volume 2 should always be the fi rst to be turned on before eith
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Rear Panel Power Supply, On/Off Switching Be sure before connecting the Volume 2 to power that the rear-chassis voltage supply is switched to the proper local rating (either 230 or 115 volts). Above all, before connecting any machines, always take additional care to power down all those to be used (and move the rear-chassis power supply switch of the Volume 2 to the “down“ position). Finally, always use the following procedure in powering up your assembly: Always power on your Volume 2 fi rst
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Operation Volume Control The single volume potentiometer controls volume for both channels. The audio signal is controlled directly by the potentiometer—thus no VCA or DAC regulators in the paths which tend to produce bigger tolerances and distor- tions. The scale of this control has been purposely marked in percentage rather than in dB values. A dB scale would not make too much sense because we cannot plan for absolute values in signal level reproduced by individual systems and in playba
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Specifi cations Inputs/Outputs Instrumentational amplifi er, electronically balanced (differential), transformerless Nominal Input Level +4 dBu Input Impedance =22 kOhm Output Impedance ‹ 600 Ohm Max. Input Level › +20 dBu Volume Gain ∞ bis -4 dB Measurements Frequency Range 10 Hz-100 kHz (100 kHz = -3 dB) CMRR › 60 dBu@1 kHz THD & N (@ +15 dBu Input Level) › -100 dBu S/N A-weighted -102 dBu Crosstalk L/R (@ 1 kHz) › -80 dBu Dynamic Range 120 dB Power Supply Toroidal transformator 3,5 VA Fuse
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Measurements Volume 2 9 AudioPrecision Volume2FREQUENCYRESPONSE 10dbSteps 04/27/0610:01:58 Volume2 +0 -10 -20 -30 -40 d -50 B u -60 -70 -80 -90 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k 200k Hz FREQRESPonlyOn.at2c
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Measurements AudioPrecision Volume 2 INPUT/OUTPUT PHASE vs 04/27/0609:49:58 FREQUENCY Volume2 +150 +100 +50 d e +0 g -50 -100 -150 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k Hz SPL IN-OUTPHASE.at2c AudioPrecision Volume2FFTSPECTRUMANALYSIS 04/27/0609:47:31 +6dB Volume2 +20 +0 -20 -40 d -60 B V -80 -100 -120 -140 2.5k 5k 7.5k 10k 12.5k 15k 17.5k 20k 22.5k Hz FFTStereo.at2c 10 Volume 2
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Guarantee & Product Registration All SPL products come with a two-year manufacturer’s guarantee against defects in material or assembly from the date of purchase. Tubes have a guar- antee of three months. End users are supported in the two-year guarantee through their distributor. In such cases, please contact your dealer for full guarantee conditions and service. Direct SPL product support requires product registration. Please fi ll out the guarantee card enclosed in the package legibly in p
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Manual Volume 2 < English 12 Volume 2
