User manual CREST AUDIO CKI

[. . . ] CKi Amplifier Owner's Manual On Off Remote Protect ACL ACL Status Active Ch A Signal Ch B CKi 800s Signal Professional Power Amplifier 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. Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION: Risk of electrical shock -- DO NOT OPEN!CAUTION:To reduce the risk of electric shock, do not remove cover. [. . . ] Address Amp ID Gain Temperature AC Voltage Ethernet Data Link A Fault Mute B + -10 -6 -10 -3 -15 -1 -30 dB -6 -3 -1 dB O n Co m O ff O n Co m O ff 3. 3V In p G ut nd N /O Co m N /C A Stereo -15 Active In Out In Out Output - Class 2 Wiring Bridge Parallel - -30 Protect IGM ACL Signal B Ch A Ch B + + x20 (. 775V) 0dB x40 Mode Ch A Ch B Input Gain Ch. A A B + Bridged Mono Mode Direct Outputs Designed and manufactured in the USA by: Crest Audio, Inc. Fair Lawn, NJ USA www. crestaudio. com Nx Ethernet AB A Sequential Turn-On V-In Fault + + B Edit Select Function I. P. Address Amp ID Gain Temperature AC Voltage Ethernet Data Link A Fault Mute B + -10 -6 -10 -3 -15 -1 -30 dB -6 -3 -1 dB O n Co m O ff O n Co m O ff 3. 3 In V p G ut nd N /O Co m N /C A Stereo -15 -30 Parallel - Active In Out In Out Output - Class 2 Wiring Bridge Protect IGM ACL Signal B Ch A Ch B + + x20 (. 775V) 0dB x40 Mode Ch A Ch B Input Gain Ch. A + Bridged p. 17 5 Operation Stereo Mode Constant Voltage Output (V & X Models only) Designed and manufactured in the USA by: Crest Audio, Inc. Fair Lawn, NJ USA www. crestaudio. com Nx Ethernet AB A Sequential Turn-On V-In Fault + + B Edit Select Function I. P. Address Amp ID Gain Temperature AC Voltage Ethernet Data Link A Fault Mute B + -10 -6 -10 -3 -15 -1 -30 dB -6 -3 -1 dB O n Co m O ff O n Co m O ff 3. 3 In V p G ut nd N /O Co m N /C A Stereo -15 -30 Parallel - Active In Out In Out Output - Class 2 Wiring Bridge Protect IGM ACL Signal B Ch A Ch B + + x20 (. 775V) 0dB x40 Mode Ch A Ch B Input Gain Ch. B + + Parallel Mode Constant Voltage Output (v & x Models only) Designed and manufactured in the USA by: Crest Audio, Inc. Fair Lawn, NJ USA www. crestaudio. com Nx Ethernet AB A Sequential Turn-On V-In Fault + + B Edit Select Function I. P. Address Amp ID Gain Temperature AC Voltage Ethernet Data Link A Fault Mute B + -10 -6 -10 -3 -15 -1 -30 dB -6 -3 -1 dB O n Co m O ff O n Co m O ff 3. 3 In V p G ut nd N /O Co m N /C A Stereo -15 -30 Parallel - Active In Out In Out Output - Class 2 Wiring Bridge Protect IGM ACL Signal B Ch A Ch B + + x20 (. 775V) 0dB x40 Mode Ch A Ch B Input Gain CV Line Ch. A + Removable Attenuator Knobs The attenuator knobs can be removed and replaced with plugs that are shipped with the amplifier. The procedure for attenuator knob removal is as follows: 1. With a small knife, remove the gray key cap of the attenuator knob revealing the inside nut. Using needle nose pliers or an appropriately sized nut driver, loosen the nut. Slide the attenuator knob off the shaft. Insert a regular screwdriver in the slotted end of the shaft and adjust attenuation to the desired level. Insert the blank plugs into the attenuator holes. Ch. A - Knob still attached Ch. B - Knob replaced with plug -10 -15 -30 llel -6 -10 -3 -15 -1 -30 dB -6 -3 -1 dB Ch A Ch B p. 18 Operation 5 Gain Select Switch The 3-position gain select switch on the rear panel to sets the overall gain of the amplifier. The left and right switch positions set the amplifier for constant gain of x20 (26 dB) or x40 (32 dB) respectively. The center position sets the amplifier for constant sensitivity. In this position, a 0dBu (0. 775 VRMS) input signal will produce maximum power at the amplifier's output. The standard factory setting is for x40 (32dB). The specifications for a specific CKi models in Appendix A contain more gain/sensitivity information. (. 775V) 0dB x20 x40 Gain Signal Ground Lift Switch The signal source equipment should share the same AC ground as the amplifier(s). In some cases, however, particularly if an amplifier is being installed in an existing system, this may result in a ground loop, creating excessive 60Hz hum at the amplifier's output. [. . . ] The setting of the amplifier's attenuators will also affect the overall gain. The attenuators are positioned after the NexSys gain control in the amp's gain structure resulting in an additive attenuation value. For example, if an attenuator is set to ­6dB, and the NexSys gain for that channel is set to ­10dB, the amplifier's overall gain will be 16dB below the amplifier's maximum ouput. Edit Select Function I. P. Address Amp ID Gain Temperature AC Voltage Amplifier channels can not be muted from the network module controls. [. . . ]