MANLEY LABORATORIES, INC. OWNER'S MANUAL MANLEY SE / PP 300B "RETRO" AMPLIFIER MANLEY LABORATORIES, INC. 13880 MAGNOLIA AVE. CHINO, CA.
CONTENTS SECTION PAGE INTRODUCTION 3 MAINS CONNECTIONS 4 CONNECTING YOUR AMPLIFIER 5 DIAGRAM 2 6 TOP PANEL BIAS PROCEDURES 7 OPERATIONAL NOTES 8 SPECIFICATIONS 9 WARRANTY 10 WARRANTY REGISTRATION 11
INTRODUCTION THANK YOU!... for choosing the Manley SE / PP 300B TRIODE Monoblock Amplifiers. Designed by David Manley, the Manley SE / PP 300B TRIODE Amplifiers use only the best available components, with the shortest and cleanest signal path possible. These amps have the unique ability to switch from Single ended to Push-Pull topologies and the ability to adjust the amount of negative feedback in 1 dB steps.
READ THIS PAGE BEFORE YOU SET UP THE AMPS, PLEASE IMPORTANT Never operate this amp without a speaker or load connected. Never drive this amp into a short circuit. Most solid state amps can be operated without a load or speaker and some can drive a short circuit because of protection circuitry. These are different - Like most tube amps the output power is less affected by changing the load impedance within the range of 4 to 16 ohms, however extremes like a short or open circuit are to be avoided.
MAINS CONNECTIONS Your amplifier has been factory set to the correct mains voltage for your country. The voltage setting is marked on the serial badge, located on the rear panel. Check that this complies with your local supply. Export units for certain markets have a moulded mains plug fitted to comply with local requirements. If your unit does not have a plug fitted the coloured wires should be connected to the appropriate plug terminals in accordance with the following code.
CONNECTING YOUR AMPLIFIER Setting up your amplifiers is rather easy. 1. Connect all source components (turntable, CD, Tuner, Tape DAT, etc.) to your preamplifier. 2. Connect the interconnects from the output of the preamplifier or switching center to the RCA input on the top rear of the amplifiers. 3. Connect the hot or "+" speaker cable to the red binding post and the common or "-" speaker cable to the black binding post (See diagarm 2).
MANLEY SE / PP 300B TRIODE MONOBLOCK AMPLIFIER A Q J N F H L B C O K M I D G P R E Amplifier Overhead View A B C D E F G H I J K L M N O P Q R RCA Input Jack XLR Balanced Input Jack ( pin 2 positive ) Speaker Terminals IEC Mains socket Mains fuse - Replace only with same type and value Tube 5U4 Rectifier Tube 5U4 Rectifier Power Tube 300B Power Tube 300B Bias trimmer ( for H & N ) Bias trimmer ( for I & P ) Input Tube 6SL7 Driver Tube 6SN7 Bias test point for 300B (H) Variable Feedback Switch
OPERATIONAL NOTES SWITCHING SINGLE-ENDED 18 / PUSH-PULL 36 This amplifier has the unique feature of being able to choose between two circuit topologies. You are able to switch between each mode while the amplifier is turned on and playing music. In SINGLE-ENDED mode the amplifier uses both 300Bs in parallel. The advantage is a minimalist circuit requiring no "phase splitter",The disadvantage is a less efficient circuit that produces half the power of PUSH-PULL.
SPECIFICATIONS Vacuum Tubes: 2 x 300B (Output), 1 x 6SN7 (Driver), 1 x 6SL7 (Input) 2 x 5U4 (Rectifier) Output Power @ 3% THD SINGLE-ENDED: 0 dB FB - 18 Watts SINGLE-ENDED: 10 dB FB - 25 Watts PUSH-PULL: 0 dB FB - 36 Watts PUSH-PULL: 10 dB FB - 42 Watts Frequency Response +/- .
WARRANTY All Manley Laboratories equipment is covered by a limited warranty against defects in materials and workmanship for a period of 90 days from date of purchase to the original purchaser only. A further optional limited 5 year warranty is available to the original purchaser upon proper registration of ownership within 30 days of date of first purchase.
WARRANTY REGISTRATION We ask that you please fill out this registration form and send the bottom half to: MANLEY LABORATORIES REGISTRATION DEPARTMENT 13880 MAGNOLIA AVE. CHINO CA, 91710 Registration entitles you to product support, full warranty benefits, and notice of product enhancements and upgrades. You MUST complete and return the following to validate your warranty and registration. Thank you again for choosing Manley Laboratories. MODEL ____________________ SERIAL No.
