User manual FOSTEX AP2090

[. . . ] The use of a filter function provided will allow delicate corrections of reproduced sound. Mixer output is best accepted by the use of either a balanced or unbalanced configuration whichever is the most appropriate for the mixer to be connected. AP2090 (Powered Near Field Studio Monitor) CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. ATTENTION: CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU' AU FOND. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. "WARNING" "TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. " SAFETY INSTRUCTIONS 1. [. . . ] Otherwise, electrical shock will result. · No heavy objects must be placed on the AC cord nor the cord be routed under the appliance. Damage to the cord will occur resulting in fire and/or electrical shock. · The AC cord must not be damaged, modified, twisted, pulled and/or heated. Otherwise, the cord will be damaged resulting in fire and/or electrical shock. · No power voltage different from that labeled on the appliance or specified in this owner's manual must be applied. The power plug must be inserted to the end of an outlet. Otherwise, fire and/or electrical shock will result. · Avoid placement of the appliance in smoky or steamy places including unusually humid or dusty places. Otherwise, fire and/or electrical shock may result. · The AC cord must not be routed near heat emitting appliances. · Anti - resonance is eliminated by the use of a UDR tangential edge and push-pull damper in the woofer. Also, substantial improvement is made in linearity, and thus, accurate response to the subtlest sound signals is realized. · The tweeter employing a UFLC diaphragm (of soft dome type), being most compliant to and reproducible of even the subtlest signals, are of a wide range design up to 40kHz. · A highly rigid cast aluminum frame is used for both woofer and tweeter. This allows successful elimination of sound colorization caused by undesired natural vibration. · Ultra lossless design offers a natural crossover between the woofer and tweeter. A -6 dB/oct crossover network is used for the woofer, while a -12 dB/oct network is used for the tweeter. · The use of HP sound reflectors provides an ideal internal sound processing means for elimination of natural vibration developing within the speaker enclosures. · Power amplifiers capable of delivering 50W/50W output are provided for the bi-amplifier driving system for the woofer and tweeter. · The low frequency filter switch and tweeter level control are provided, allowing frequency response compensation. · The amplifier system is capable of accepting balanced (XLR) or unbalanced (phone) input. [. . . ] The human ear's sensitivity in the right-left direction makes horizontal positioning of enclosures undesirable. Vertical positioning is also recommendable so that heat generated by the amplifiers can be more effectively dissipated. It is configured, through model analyses, to function optimally as diaphragm edges. Use of this edge is with the woofer which plays a key part in the overall speaker system performance. <Figure-2> * Figures 1 and 2 above show the photographs of the Model NF-1, which employs the same materials and construction as the Model AP2090. [. . . ]