User manual SPL VOLUME8

[. . . ] 6 Power Supply, ON/Off Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Rear Panel Graphic, Signal Connections, DB 25 Pin Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In connecting any cables be sure that the Volume 8 and all machines affected are turned off. It makes good sense to think about where you place the unit before connecting it. It should be positioned so that you can easily reach it, but there are other considerations. Try not to place it near heat sources or in direct sunlight, and avoid exposure to excessive vibrations, dust, heat, cold or moisture. It should also be kept away from transformers, motors, power amplifiers and digital processors. · Leave repairs and maintenance to a qualified service technician. Should foreign objects fall inside the case, contact your authorized dealer or support person. · To avoid electric shock or fire hazards, do not expose your unit to rain or moisture. · Always unplug the cable by pulling on the plug only; never pull on the cable. The power supply was carefully engineered to provide clean and consistent current ­ an important prerequisite for excellent audio. Built around a toroidal transformer, the power supply generates a minimal electromagnetic field with no hum or mechanical noise. The output side is filtered by an RC circuit to extract noise and hums inherent in commercial AC power. All audio-related components are fed by two separate voltage regulators to minimize disturbance from other components. An AC power cord is included for connection to the standard 3-prong IEC connector. The transformer, power cord and IEC connector are VDE, UL and CSA approved. The AC fuse is rated at 250 mA (230 V version) or 500 mA (115 V version). Power Supply Volume 8 5 Rear Panel Power Supply, On/Off Switching Be sure before connecting the Volume 8 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, take additional care to power down all those to be used (and move the rear-chassis power supply switch of the Volume 8 to the "down" position). Finally, always use the following procedure in powering up your assembly: Always power on your Volume 8 first before the power amp or active speakers. When powering down, always power off the power amp or active speakers before your Volume 8. Not following this sequence can result in ear or speaker damage from high level discharges. The Volume 8 comes with a standardized 3-pole (grounded) IEC power cord which is connected to the main power input socket (Mains Input). The electrical pin configuration of the balanced DB 25 input and output sockets comply with the TASCAM standard (see graphic below). DB 25 to XLR, TRS or RCA multicore cables are required for connection of input and output signals. [. . . ] For a perfectly matched gaining the Volume control would now be set above a 50% scale position. Should this 83 dB SPL occur markedly above a 6080% scale position, one should lower the power amp's/active speaker's input sensitivity (=higher dB value). On the other hand, the power amp's/active speaker's input sensitivity should be raised if the 83 dB SPL point is reached far before the 60% control level. In cases where regulating power amp/active speaker input is not enough, one may reach good values by changing the D/A converter output level (for example from +4 dB to 0 or -10 dB in cases where this switch option may exist). [. . . ]