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Manley Labs 300B manual

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Table of contents for the manual

  • Page 1

    MANLEY LABORATORIES, INC. OWNER'S MANUAL THE 300B PREAMPLIFIER MANLEY LABORATORIES, INC. 13880 MAGNOLIA AVE. CHINO, CA. 91710 TEL: (909) 627-4256 FAX: (909) 628-2482 email: emanley@netcom.com http://www .manleylabs.com[...]

  • Page 2

    CONTENTS INTRODUCTION 3 MAINS CONNECTIONS 4 CONNECTING YOUR PREAMPLIFIER 5 FIGURE 1 FRONT PANEL 6 FIGURE 2 TOP PANEL 7 FIGURE 3 BACK PANEL 8 OPERATIONAL NOTES 9 SPECIFICATIONS 10 WARRANTY 11 WARRANTY REGISTRATION 12 SECTION PAGE[...]

  • Page 3

    INTRODUCTION THANK YOU!... for choosing the Manley Laboratories "The 300B Preamplifier". Designed by David Manley, the 300B Preamplifier uses the best available parts with the shortest, cleanest, signal path possible. This Preamp features the 300B direct heated triode as the line and headphone driver. The 300B is typically used in low pow[...]

  • Page 4

    MAINS CONNECTIONS Your preamplifier 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 com- plies with your local supply. Export units for certain markets have a moulded mains plug fitted to comply with local require- ments. If your unit d[...]

  • Page 5

    CONNECTING YOUR PREAMPLIFIER Setting up your preamplifier is rather easy. 1. Please refer to page 8 diagram 3 for an illustration of the back of the preamplifier. 2. There are two pairs of UNBALANCED RCA main outputs electically identical. Connect either (or both for bi-amping) of the RCA outputs to the input of your amplifier as required. 3. UNBAL[...]

  • Page 6

    CD TAPE TUNER VIDEO VOLUME INPUT SELECT ON OFF AUX HEADPHONES HEADPHONES LINE OUTPUT A B C D E F A - INPUT SELECT - 5 Position switch for input selection. Each input is electrically identical. The RECORD OUT directly follows this switch. There is no buffer amp to isolate the effects of loading and cable capacitance so we recommend disconnecting any[...]

  • Page 7

    300B 300B 0D3 0D3 5AR4 5AR4 6SL7GT 6SL7GT HEADPHONE IMPEDANCE HANDCRAFTED IN CHINO, CALIFORNIA OUTPUT MODE LEFT RIGHT PREAMP LINE DRIVER RECTIFIER REGULATOR HEADPHONES CAUTION! TUBES RUN HOT - DO NOT TOUCH TUBES DO NOT OPEN CHASSIS - HIGH VOLTAGES ! REFER SERVICING TO QUALIFIED TECHNICIANS NOTE - PIN SIZE FOR PROPER ORIENTATION DESIGNED BY DAVID MA[...]

  • Page 8

    REAR PANEL A - MAINS FUSE - Replace with 2A SLO-BLO fuse only. B - IEC MAINS SOCKET - Standard IEC mains socket (120/240 VAC as indicated) C - LINE OUTPUTS - Main left and right outputs driven by 300B's. Connect these to your power amplifier inputs when the amps are off. These 2 pairs of outputs are electrically identical and a bi-amp set-up i[...]

  • Page 9

    OPERATIONAL NOTES SWITCHING ON The power switch is located on the right hand corner of the front panel. Flip the switch up to turn on the preamplifier and down to turn off the preamplifier. RUNNING It is not recommended that you leave your preamplifier permanently switched on. This only wastes electricity and tube life. Your preamplifier has both t[...]

  • Page 10

    SPECIFICA TIONS Vacuum Tubes: 2 x 300B, 2 x 6SL7GT 2 x 5AR4, 2 x OD3 Lamp type 1/4 X 1 1/4, 12 volt, .15 amp Fuse type 120VAC operation: MDL2, 2 AMP / 250 Volt 220VAC operation: MDL1, 1 AMP / 250 Volt SLO-BLO Gain 18 dB at max Volume 1 volt in = 8 volts out Noise Floor typically -70 dB 1Hz - 100 kHz Signal to noise typically 105 dB A WGT 20-20K Fre[...]

  • Page 11

    W ARRANTY 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 firs[...]

  • Page 12

    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 Or you may FAX this form in to: 909-628-2482 Registration entitles you to product support, full warranty benefits, and notice of product enhancements and upgrades. [...]