SPL Volume8 Controller The SPL Volume 8 is a balanced volume control for surround sound set ups of up to eight channels. As the unit is active, it bypasses some of the disadvantages that come with passive designs that cause impedance variations and degrade linear frequency response. SPL Volume 8 Controller Features High quality balancing stages with extremely good common mode rejection (minimize interferences and disturbances in the signal paths) The mute switch allows for very fast reaction times in cases where loud speakers or ears should be protected (for example, with computer crashes) Users of analog summing without monitoring facilities can cost effectively improve their systems The Volume8 is built only with analog circuitry and performance, and its high quality parts in sophisticated circuitry design are prerequisites to superior audio quality: Custom designed, high end, eight-ganged potentiometer with invariable precision at each and every gain level Illuminated passive mute switches from ALPS, relay switching for all channels Input and outputs over DB-25 connectors (to multicore XLR or 1/4-inch TRS) A high quality power supply with toroidal transformer Input and outputs over DB-25 connectors (to multicore XLR or 1/4-inch TRS) Massive, 45 mm/1.78-inch diameter aluminum knob ensure consistent, refined handling The elegant, compact format housing (215 x 80 mm or 8.5 x 3.1 inch) allows for flexible desktop positioning near or below a computer monitor or generally saving space in positioning. SPL Volume 8 Specifications Inputs/Outputs Instrumentational amplifier, electronically balanced (differential), transformerless Nominal Input Level: +4 dBu Input Impedance: =22 kOhm Output Impedance: ‹ 600 Ohm Max. Input Level: › +20 dBu Volume Gain: ∞ to -4 dB Measured Data 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:155 VA Fuse: 250 mA/230 V, 500 mA/115 V Voltage Selector: 230/50 Hz ‹› 115 V/60 Hz Power Consumption: ca. 15 W Dimensions & Weight Housing: 215 x 80 x 220 mm/8.5 x 3.1 x 8.8 inches Depth incl. Potentiometer & Sockets: 245 mm/9.8 inches Weight: 1.9 kg/4.18 lb Notes: 0 dBu = 0.775 V
