Owner’s Manual
Table of Contents Read This First…………………………………….2 Introduction by Jim Fosgate……………………...3 Unpacking…………………………………………..4 Tubes and Tube shield Installation………………5 Product Placement………………………………...6 Connecting your Fosgate Signature……………..7 Phono stage settings…………………………7 & 8 Powering UP……………………………………….8 Tube Rolling………………………………………..9 Specifications……………………………………..
Read This First Please read carefully the following safety instructions, which have been included in compliance with international safety regulations. • Read this instruction manual prior to connecting and operating this unit. Retain this manual for future reference. • Retain all packing materials and carton for future need. • To prevent fire or shock hazard, do not expose this unit to rain or moisture or operate in these conditions. • This unit contains voltages that can cause serious injury or death.
Introduction • • • • • • The design is the result of more then 100 different hand built preamp circuits dating back to the 1970s. All amplification is accomplished with the SRPP (push pull) configuration for the best possible linearity, lowest noise and distortion. No solid-state devices are placed in the signal path and a tube is used for the high voltage rectifier. The power supply is very different and contributes to the high performance. There are no regulated power supplies.
Unpacking Opening the cartons: Use caution when opening the cartons with a sharp edged tool not to damage any of the contents. Included with your Fosgate Signature phono stage is a pair of white gloves for handling both the unit as well as the tubes. This will avoid any finger oil from getting on the tubes that could cause irregular heating of the glass. Foam packing: When you open the inner carton, you will see a layer of foam covering the phono stage.
Tube and tube shield installation Tube compliment: 2 6DJ8’s - V1 and V2 2 12AX7 - V3 and V4 2 12AT7 - V5 and V6 1 6X4 - high voltage rectifier Install the tubes: When inserting tubes into their sockets, be very careful not to bend the metal pins. Begin by installing the tall 6X4 rectifier tube into the socket just in front of the power transformer housing. Continue installing the other six tubes by first inserting two 6DJ8’s in the two sockets nearest the rear of the chassis, V1 and V2.
Align those slots over the pins and carefully insert the tube shields over the three tubes. There are springs inside the top of the shields therefore you will need to push down until you feel the shields hit bottom, then twist them in a clockwise direction to lock the shields onto the pins. Adjust the tubes and shields to stand up straight.
Audio Connections: Before connecting to your line-stage preamp or integrated amp, make sure the volume control of that unit is completely turned down. Connect your turntable to the left and right “INPUTS” of the phono stage, then secure the turntable ground wire to the grounding post provided on the back panel. Next, connect a pair of cables to the left and right “OUTPUTS” of the phono stage.
Settings: Refer to the information sheet for your phono cartridge to determine the output voltage specification and the recommended cartridge resistive loading setting or range. A pair of gain switches are located at the base of the third tube from the back of the chassis (see picture page 6, right channel visible). Left and right channel gain switches provide a gain of 60dB (MC) or 42dB (MM).
Tube Rolling: Your Fosgate Signature phono stage ships with an extra 12AT7 tube that can be used in place of the 12AX7 in position V3 to give a slightly more detailed top end. Final choice will depend on listener preference and audio system. Do not change tubes when the unit is powered on. To avoid risk of burns, do not touch vacuum tubes when the unit is powered on or within 30 minutes of powering down. Below is a list of equivalent tubes used in your Fosgate Signature phono stage if you wish to tube roll.
SPECIFICATIONS Gain: 42dB MM, 60dB MC Loading: 100Ω, 300Ω, 500Ω, 1kΩ, 47kΩ, 100kΩ Capacitance: 50pf Tube compliment: 2 6DJ8’s V1 and V2 2 12AX7 V3 and V4 2 12AT7 V5 and V6 1 6X4 Dimensions: 13 3/16" W x 10 3/4" D x 5 5/8" H Weight: 10 lbs 5662 Shattuck Ave Oakland, CA 94609 510 547-5006 fax 510 547-5009 info@musicalsurroundings.com www.musicalsurroundings.
90 DAY LIMITED WARRANTY TERMS AND CONDITIONS (2 Year optional extended service contract) 1. Musical Surroundings warrants the product designated herein to be free of manufacturing defects in material and workmanship, subject to the conditions herein set forth, for a period of 90 days from the date of purchase by the original purchaser.
