Page 72/112 NEXO A NALOGUE GEO S12TD CONTROLLER• High CMRR input stage and High current drive output• Compensation of power compression effects on the system response curve.The Analogue TDcontroller is designed to be inserted between the Audio source (console, preamplifier,etc.) and the power amplifier.9.4.2 Front PanelMost front panel functions and indicators are located inside 2 distinct windows: left-hand areas relate tofunctions and indicators dedicated to the optional Sub-bass section, while right-hand window containsindicators concerning servo control operation for the S12 cabinets.For more technical details about servo control operation and internal electronic processing, please referto section “TDcontroller REFERENCE GUIDE.” Page 74.Turning the LS channel Overlap / CrossoverPushing the CONFIGURE buttonmodifies the high pass filtering. Itdoes not affect the sub output, whichwill always be a filtered sub signal.(This is therefore not a Sub on/offbutton). In the « Overlap » position,the S12 is exploited to its maximumcapability.This position should be used if the system is being used without a Subbass. It can also be used with theSubbass; In this case, there will be a boost in the crossover area. The « Cross over » position isgenerally recommended when using the Subbass.Adjusting the Subbass level (Sub Level)The potentiometer adjusts the level of theSubbass channel, a range of 12 dB allows avariety of configurations and applicationconditions to be accommodated. Centerposition of the knob is calibrated for 1Subbass used with 2 distant S12.Amplifier & Protection indicatorThe bicolor green/red AMP LED indicates signalpresence at the sense input of the concernedchannel, allowing visual confirmation of the returnconnection of the Sense cables from the amplifieroutput. The LED is flashing red, when the Peaklimiter is acting, reducing excessive peak voltageor levels capable of overloading the channelamplifier.• The yellow VLF LED indicates that displacement protection for the Subbass are engaged on theSubBass channel. The temperature protection is not monitored.• On each side of the S12 main system window, yellow TEMP and DISP LEDs indicate whenprotection has been activated (temperature or displacement control) for the LF (the HF driverstemperature protection is not monitored).Peak Limiter adjustmentsThe Analogue TDcontroller features two independent peak limiter trims (one for the LSsub amplifiersection, one for the S12 amplifier section), which allows the peak limiter to be set to limit the maximumpower of the amp (without affecting the protections threshold). The peak limiter has no real cabinetprotection functions; it must be tuned to avoid overdriving the amp that in turn can generate obviousclipping noise.
