MANLEY LABORATORIES, INC. OWNER'SMANUAL MANLEY 250 / 100 WATT MONOBLOCK 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 250/100 Monoblock Amplifiers. Designed by David Manley, the Manley 250/100 Monoblock Amplifiers use only the best available components, with the shortest and cleanest signal path possible, and with the use of our own in-house CNC machine shop we can provide you with a amplifier that looks as good as it sounds.
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. IF your source has a truly BALANCED output, connect TO the XLR input and select the balanced input. This switch is a locking type to prevent inadvertant or accidental switching (say, while cleaning).
OUTPUT B+ MAINS IEC MAINS FUSES IN INPUT RCA 3 1 2 4 6414 6414 10 8 6 5 7 9 12AT7 Amplifier Overhead View Tube Location OUTPUT TUBES:10 x RUSSIAN EL34G The EL34 type we recommend are the Russian up-rated EL34G. This has been proven to be the most rugged and reliable of this type and we strongly emphasize that only the RUSSIAN EL34G's should be used in this amplifier. The MANLEY 250/100 WATT MONOBLOCK has been thoroughly optimised around this tube.
MAINS IN IEC MAINS FUSE SLO-BLO B+ FUSE SLO-BLO XLR BALANCED INPUT BALANCED UNBALANCED SWITCH RCA INPUT REAR VIEW OF AMPLIFIER SPEAKER OUTPUT BINDING POSTS
FRONT VIEW OF AMPLIFIER TRIODE OPERATE TETRODE STANDBY 1 2 POWER LED STANDBY LED (BLINKING) 3 4 5 6 GROUND 7 8 FRONT VIEW OF AMPLIFIER WITH INSERT REMOVED OPERATE STANDBY EVER-WARM SOFT START SWITCH SHOWING BIAS MEASUREMENT POINTS AND BIAS ADJUST POINTS MAINS POWER ON / OFF SWITCH
BIAS PROCEDURES The Manley 250/100 Monoblock Amplifiers uses a fixed bias system that requires very little attention. If you wish to adjust or check the bias, follow the following steps. For this procedure you will need a voltmeter (a hand held autoranging DMM digital multimeter is the easiest), a 3/32" allen key, and a small 1/8" flat screwdriver. 1. Remove the four silver hex cap head screws which secure the insert to the faceplate.
OPERATIONAL NOTES SWITCHING ON -- SOFT START The MANLEY 250/100 is equipped with a SOFT-START circuit which lessens the initial stress the amplifier takes upon turn-on. We recommend that you use this soft start facility whenever you turn the amplifier on and especially when cold. 1. Ensure that the "mains" switch on the front panel is in the "off" or "0" position and the OPERATE / STANDBY switch is in the STANDBY mode. 2.
SPECIFICATIONS Vacuum Tubes: Output Power Frequency Response, +/- .5 dB Input Sensitivity 10 x EL34G (Output), 2 x 6414 (Driver), 1 x 12AT7 (Input) TETRODE: 240 Watts (@1.5% THD 5 ohm load) TRIODE: 100 Watts (@1.
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.