JEFF ROWLAND Conductor Manual
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JEFF ROWLAND Conductor Manual

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C O N D U C T O R
PHONO PRE AMPLIFIER
© Jeff Rowland Design Group 2019・All Rights Reserved

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Summary of Contents for JEFF ROWLAND Conductor

  • Page 1 C O N D U C T O R PHONO PRE AMPLIFIER © Jeff Rowland Design Group 2019・All Rights Reserved...

  • Page 2: Table Of Contents

    Owners Manual Use ..................Maintenance and Care ..................Unpacking and Placement ................Front Panel Operations ................... Rear Panel Connections .................. INVERSE RIAA Network ................Conductor Cartridge Loading Chart ............Conductor High Output Moving Coil Dip Switch Chart ......Specifications ....................

  • Page 3: Note From Jeff Rowland Design Group

    “PS”. Please include this number with any correspondence regarding your Conductor It has been my joy to create an audio component of enduring value that reflects the highest ideals of musical and artistic expression. It is my hope that these qualities will enrich your experience and pride of ownership.

  • Page 4: Introduction

    A list of these features with a short technical description is presented below. 1. The CONDUCTOR can be ordered with one to four active cartridge inputs. Inputs 1,2, and 3 are dedicated for Moving Coil (MC) cartridges and Input 4 is dedicated only for Moving Magnet (MM) or High Output Moving Coil (HOMC) cartridge types.
  • Page 5 RF and EMI ingress. The transformer cartridge interface is provided with both XLR and RCA input connector types. 4. The CONDUCTOR can be ordered with two different types of input transformer core materials, standard or high-grade amorphous type.
  • Page 6 CONDUCTOR can be plugged into one of the unused PSU auxiliary DC outputs. The Model PPS-1 DC Power Supply can also be used to power the CONDUCTOR via its DC output connector. Both power supply options provide a fully...
  • Page 7 Network board is included with the CONDUCTOR. This device is installed between any line level output such as a tuner or CD player and any active input of the CONDUCTOR. The line level source signal is attenuated and pre-equalized such that it can be safely used to break-in the CONDUCTOR circuitry in much less time than simply playing phonograph records.

  • Page 8: Safety Instructions

    SAFETY INSTRUCTIONS The CONDUCTOR Phono Pre amplifier has been designed to operate at the highest level of efficiency and performance in any normal operating situation; however, there are a few important use and care principles that must be kept in mind when operating the CONDUCTOR: §...

  • Page 9: Protective Systems

    PROTECTIVE SYSTEMS Both CONDUCTOR power supplies, the PSU and PPS-1 DC Power Supply, are equipped with external fuses for protection against excessive AC current draw; however, since no protection circuitry or system can completely protect a product from every electrical hazard, certain precautions should be observed.

  • Page 10: Limited Warranty

    In the event of such a failure, the product will be repaired or replaced by Jeff Rowland Design Group, Inc. through one of its dealers. This warranty is extended to the original purchaser only and is non-transferable to any secondary or other purchaser.
  • Page 11 Jeff Rowland Design Group, Inc. strives to manufacture the very finest possible equipment and therefore reserves the right to make changes in design and improvements upon its previously manufactured models. THE ABOVE WARRANTY IS THE SOLE WARRANTY GIVEN BY JEFF ROWLAND DESIGN GROUP, INC.

  • Page 12: Owners Manual Use

    This owners manual is designed to make installing and using this product as easy as possible. Information in this document has been carefully checked for accuracy at the time of printing; however, Jeff Rowland Design Group, Inc.'s policy is one of continuous improvement, therefore design and specifications are subject to change without prior notice.

  • Page 13: Maintenance And Care

    All internal circuitry is maintenance-free such that no adjustments of any kind are necessary over the lifetime of the product. If the CONDUCTOR is ever in need of service, updating, or upgrading, it should only be returned to an authorized repair facility or technician for servicing.
  • Page 14 If you have any questions about the care or cleaning of your CONDUCTOR, please contact your dealer before attempting to clean the chassis. The use of...

  • Page 15: Unpacking And Placement

    We strongly suggest that you save all of the packing materials. If the CONDUCTOR is returned to your dealer or Jeff Rowland Design Group, the original packing materials must be used for shipment to avoid possible damage.
  • Page 16 Power Supply (If ordered) § Inverse RIAA Network and two pair of RCA-RCA interconnect cables IMPORTANT: RETAIN ALL PACKING MATERIALS FOR FUTURE TRANSPORT. SHIPPING PRODUCT IN INADEQUATE PACKING MATERIALS MAY VIOLATE THE JEFF ROWLAND DESIGN GROUP MANUFACTURER’S WARRANTY. ! 1 6...

  • Page 17: Front Panel Operations

    FRONT PANEL OPERATIONS 1. The CONDUCTOR can be equipped with one to four active inputs. Each input can be selected by depressing the desired INPUT button. A small green light will illuminate directly above a selected input whether or not a particular input is active.
  • Page 18 CONDUCTOR outputs STANDBY P r e s s t h i s b u t t o n t o p l a c e t h e CONDUCTOR in or out of STANDBY mode MONO Press this button for playback of...

  • Page 19: Rear Panel Connections

    Grounding thumbscrews have been provided on each input to provide earth grounding of a connected phono turntable. Due to the Conductor’s ability to reject hum fields from any source, these grounding connections may not be needed in a particular system.
  • Page 20 47k ohms for potential cartridge performance increases. Values other than 47 k ohms is only available when the Conductor switch is set to HOMC. Refer to the Loading Chart for High Output Moving Coil Cartridges in this manual.)

  • Page 21: Inverse Riaa Network

    DIP switch sliders to the proper position. The code is screened for each configuration on the network circuit board. For example, if INPUT 4 of the Conductor is active and equipped for Moving Magnet cartridges, note that the code indicates that switch positions 7 and 8 would be switched to the ON position.
  • Page 22 “break-in” signal whenever the phono turntable is not being used, to facilitate a complete break- in of all internal circuitry of the CONDUCTOR. Expect dramatic improvements of the CONDUCTOR sonic performance after 400 hours or more of “break-in” using this Inverse RIAA network.

  • Page 23: Conductor Cartridge Loading Chart

    CONDUCTOR CARTRIDGE LOADING CHART Conductor Cartridge Loading Chart for Moving Coil Input 1-3 Toggle Switches Loading Resistance in Ohms Standard High Gain Option 1000 ! 2 3...

  • Page 24: Conductor High Output Moving Coil Dip Switch Chart

    CONDUCTOR HIGH OUTPUT MOVING COIL DIP SWITCH CHART Note: DIP switch is located inside the CONDUCTOR chassis. The bottom cover of the chassis must be removed to access switch. The switch is located on the circuit board directly behind the MM/ HOMC Input 4 connectors, and is located adjacent to the Lundahl transformers near the center of the circuit board.

  • Page 25: Specifications

    68 dB, ref. 0.5 mV@1 kHz, unweighted THD: 0.0015%. 30 Hz -20 kHz CMRR: 110 dB, 20 Hz - 20kHz Conductor chassis weight: 25 lbs/11.33 kg Conductor dimensions: (H/W/D) 3.5” x 15.5” x 9.75”/ 88.9mm x 393mm x 248mm ! 2 5...

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