User manual JEFF ROWLAND COHERENCE

[. . . ] Each input can be individually adjusted for R/L balance, mono/stereo, absolute phase, input impedance, and gain, exclusively independent of every other input. Individually adjusted input settings are automatically memorized and recalled when returning to that input. Built-in "pink noise" generator facilitates break-in of preamplifier components and interconnected associated components. Six-function hand-held IR remote control with separate IR sensor/ display unit for remote IR reception and volume level indication. [. . . ] Note: BATT mode is not allowed unless the batteries have achieved sufficient charge capacity. B LISTEN SELECT rocker switch: Momentarily pressing the upper section enables INPUT/RECORD buttons 1-7 for listening via the preamplifier Main output jacks. LISTEN SELECT lamp will remain illuminated unless the lower section Record Select rocker switch is pressed. C RECORD SELECT rocker switch: Momentarily pressing the lower G MONO rocker switch: Momentarily pressing the upper section of the section enables INPUT/RECORD buttons 1-7 for recording via the preamplifier Record output jacks. RECORD SELECT lamp will remain illuminated unless the upper section LISTEN SELECT rocker switch is pressed. H PHASE rocker switch: Momentarily pressing the upper section of the PHASE rocker switch inverts the absolute phase of both channels of the selected Input. Pressing the lower section of the PHASE rocker switch restores normal polarity to both channels of the selected Input. Function Controls continue on the next page. Front Panel Function Controls Front Panel Function Controls, (cont. ) C LISTEN SELECT O GAIN H INPUT TERM. E MONO R PHASE E BYPASS N MUTE C E M RECORD SELECT GAIN I J VOLUME K LISTEN RECORD 1 2 3 4 5 6 7 BAL L CUT R L JEFF ROWLAND D E S I G N G R O U P CHARGE LOW FULL MODE SELECT BATT MODE AC Front Panel Function Controls, (cont. ) I BYPASS rocker switch: Momentarily pressing the upper section of the BYPASS rocker switch enables the rear panel BYPASS inputs. The overall gain of the preamplifier remains fixed at 0 dB (unity) gain. All other preamplifier functions are disabled except for record functions. All previously selected front panel lamps are not illuminated with the exception of the BYPASS and selected RECORD input lamp. Pressing the lower section of the BYPASS rocker switch or selecting any other Listen input will restore normal operation. The previously selected LISTEN Input lamp is illuminated and the BYPASS lamp is not illuminated. MUTE rocker switch: Momentarily pressing the upper section of the MUTE rocker switch mutes the preamplifier outputs. Pressing the lower section of the MUTE rocker switch restores the normal condition of the preamplifier outputs. image is shifted to the left or right slightly for each press of the BAL L or BAL R button. For each 0. 5 dB that one channel is offset, the opposite channel is offset in the opposite direction by 0. 5 dB. This feature maintains that the absolute volume level will remain the same even though the image will be shifted by a specific amount. A total of six (6) presses on each button (3dB) can be achieved which will give a total imbalance of 6 dB between right and left channels. Either the L or R lamp will be illuminated to indicate a channel imbalance. Otherwise, neither L nor R lamp is illuminated. L CUT L/R push buttons: If the Mute lamp is illuminated, pressing the CUT L push button will mute the left channel only. Conversely, if the Mute lamp is illuminated, pressing the CUT R push button will mute the right channel only and the CUT R lamp illuminates. To restore normal operation, press the lower section of the MUTE rocker switch. The VOLUME control provides a fixed range of 63. 5 dB in increments of 0. 5 dB throughout a rotation of 230 degrees. The 63. 5 dB range remains constant, independent of the overall gain selected by the GAIN rocker switch mentioned above. [. . . ] The Coherence Preamplifier utilizes circuit technologies which require a much longer "break-in" period than other preamplifier designs. It is recommended that a period of at least eight (8) days (200 hours) of continuous operation be allowed before full sonic performance potential can be expected. Installation and Operation Remote Control Features A The six-function, hand-held, IR remote transmitter permits remote operation of Input Selection, Volume Up/Down, Balance L/R and Mute functions B A separate remote sensor/display unit simultaneously receives transmitted data and displays the numerical Volume control position from 0 to 63. 5 dB in increments of 0. 5 dB. C The supplied RJ-11 cable allows the remote sensor/display unit to be placed within two meters of the preamplifier for optimal IR reception and/or volume control position viewing. Up to 30 meters of cable length can be used if desired. D The Interconnect Cable Adapter should first be connected securely to the DB-25 connector on the rear panel of the Power Supply using the integral finger screws. The RJ-11 cable can then be installed from the Remote Sensor/Display unit to the adapter. [. . . ]