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Manley 300B Owner's Manual

Manley laboratories, inc. owner's manual preamplifier 300b
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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

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  • 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: Table Of Contents

    SECTION INTRODUCTION MAINS CONNECTIONS CONNECTING YOUR PREAMPLIFIER FIGURE 1 FRONT PANEL FIGURE 2 TOP PANEL FIGURE 3 BACK PANEL OPERATIONAL NOTES SPECIFICATIONS WARRANTY WARRANTY REGISTRATION CONTENTS PAGE...

  • Page 3: Introduction

    Pay attention to the size of the pins to properly align the tubes before inserting. The large pins go into the large sockets. It is difficult but possible to insert the 300B's wrong and damage the preamp. Tubes may become loose during transit. Straighten and press down each tube before plugging the preamplifier into the mains socket.

  • Page 4: Mains Connections

    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.

  • Page 5: Connecting Your Preamplifier

    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.
  • Page 6 INPUT SELECT TAPE TUNER VIDEO 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 interconnect cables from the RECORD OUT if you are not recording.

  • Page 7: Top View

    It is possible to put the 300B's in wrong. Note the two large pins and the two small pins on the base of the tube. The two large pins go into the two large holes in each tube socket.

  • Page 8: Rear Panel

    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 is one application.

  • Page 9: Operational Notes

    We recommend that you have your preamplifier checked every 4-5 years, depending on usage. An excessive increase in noise level can indicate the need to replace a tube. A 300B is a long life tube. REPLACING A TUBE OR LAMP. You may need a small Phillips screwdriver and a replacement tube or lamp.

  • Page 10: Specifications

    SPECIFICATIONS 120VAC operation: 220VAC operation: - ,-70,-60,-50,-46, -44,-42,-40,-38,-36,-34, etc, -12,-10, -6, 0 2 x 300B, 2 x 6SL7GT 2 x 5AR4, 2 x OD3 1/4 X 1 1/4, 12 volt, .15 amp MDL2, 2 AMP / 250 Volt MDL1, 1 AMP / 250 Volt...

  • Page 11: Warranty

    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.

  • Page 12: Warranty Registration

    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 300B PREAMP PURCHASE DATE ______________ SUPPLIER ______________________ --------------------------------------------------------------------------------------------------------...

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