Manley Labs 500 - 200 WATT MONOBLOCK AMPLIFIER User Manual

MANLEY

LABORATORIES, INC.

OWNER'S MANUAL

MANLEY REFERENCE

500 / 200 WATT
MONOBLOCK

MANLEY LABORATORIES, INC.

13880 MAGNOLIA AVE.

CHINO, CA. 91710 USA

TEL: [phone]
FAX: [phone]

email: [e-mail]

CONTENTS

SECTION PAGE

INTRODUCTION 3

MAINS CONNECTIONS 4

CONNECTING YOUR AMPLIFIER 5

DIAGRAM TOP VIEW 6

DIAGRAM REAR VIEW 7

DIAGRAM FRONT VIEW 8

BIAS PROCEDURES 9

OPERATIONAL NOTES 10

SPECIFICATIONS 11

WARRANTY 12

WARRANTY REGISTRATION 13

INTRODUCTION

THANK YOU!...

for choosing the Manley 500/200 Monoblock Amplifiers. Designed by David Manley, the Manley 500/
200 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.

The circuit and the components used have been chosen carefully after years of development and
refinement for reliability, constancy and most importanly, musical, accurate, and emotional delivery of
the sound. The circuit topology is similar to other designs in the MANLEY range. This amplifier is
configured to switch between triode or tetrode operation which allows the user to choose between the
sonic benefits and seductive qualities of triode and the more powerful tetrode operation mode. We
emphasize big, beefy resevoir capacitors in the high voltage supplies giving plenty of instant energy for
dynamic performance of transient peaks and bass performance which often exceeds that of rival solid­state amplifiers. We run high voltages on the plates of the output tubes and are thus able to run them at
lower current which will result in longer life for the output tubes. Careful use of the 'EVER-WARM'
power switching should also greatly increase the life of the output tubes as well as allow your
amplifiers to always be ready for pleasurable listening. Each output tube has its own bias adjust, and the
procedure for adjusting each tube's current draw is described in this manual. The FEEDBACK &
SLOPE controls featured on the 500/200 allow the user to optimise the amplifier-speaker interface.

The output transformer is a revolutionary new design by David Manley which is wound on the Manley
Labs factory premesis. Its stellar performance will be obvious upon first listening. The secret is in
keeping both phases of the push-pull halves always equal, and in this new output transformer design,
David has achieved just that. The output transformer has been factory set for an optimum 5 ohm load
which will drive most speakers.
Thank you again, and please enjoy!

MAINS CONNECTIONS

GENERAL NOTES

LOCATION & VENTILATION

The Manley 440/200 Monoblock Amplifiers must be installed in a stable location with ample ventilation. Allow a
minimum of 2 inches of clearance on the top and sides of the amplifiers, such that a constant flow of air can flow.
Do not place amplifiers directly on high pile carpet or any other surface that will block the ventilation vents
underneath the amplifiers. If you have small children or pets, you should consider placing the amplifiers out of
reach to prevent damage to the amplifier or damage to your small children or pets by the amplifier as the tubes do
get hot during operation.

WATER & MOISTURE

As with any electrical equipment, these amplifiers should not be used near water or moisture. If liquid enters the
amplifier, it must be immediately returned to your dealer for servicing.

SERVICING

The user should not attempt to service the amplifier beyond that described in the owner's manual. Refer all
servicing other than biasing and tube replacement to Manley Laboratories

SPECIAL NOTES

Tubes may become loose during transit. Straighten and press down each tube before plugging the amplifier into
the mains socket. Furthermore, do not touch the tubes after the amplifier has been switched on, as the tubes
become very hot during operation and should only be handled after the power has been turned off and the tubes

have cooled.
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.

GREEN/YELLOW EARTH terminal
BLUE NEUTRAL terminal
BROWN LIVE terminal

As the colours of the wires in the mains lead may not correspond with the coloured marking identifying the terminals in your plug proceed as
follows;

The wire which is coloured GREEN/YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety
earth symbol or coloured GREEN or GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal in the plug which is marked by the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal in the plug which is marked by the letter L or coloured RED.

DO NOT CONNECT/SWITCH ON THE MAINS SUPPLY UNTIL ALL OTHER CONNECTIONS HAVE BEEN MADE.

WARNING!

!

TO PREVENT THE RISK OF ELECTRIC SHOCK

DO NOT OPEN THE CABINET

REFER SERVICING TO

QUALIFIED PERSONEL