Instruction/ maintenance manual of the product AMPLIFIERS Manley Labs
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Neo-Classic 250 & 500 WATT AMPLIFIERS OWNER'S MANUAL brought to y ou by the c lever folk s at: MANLEY LABORATORIES, INC. 13880 MAGNOLIA A VE. CHINO, CA. 91710 USA TEL: (909) 627-4256 FAX: (909) 628-2482 email: emanley@manleylabs.com website: www.
CON TE NT S SECTION PAGE INTRODUCTION 3 MAINS CONNECTIONS 4 CONNECTING YOUR AMPLIFIER 5 TOP VIEW & TUBE LOCATION 6 FRONT & REAR VIEW 7 OPERATIONAL NOTES 8 BIAS PROCEDURE 9 REPLACING TUBES 10 T.
INTRODU CTION Tried and true: The Manley Neo-Classic 250 and 500 Watt Monoblocks have been refined over years and years of development. Reliability that you can depend on combined with musical accuracy and emotional authority is what these amplifiers promise and deliver.
Your 250's or 500's have been factory set to the correct mains voltage for your country (well, that is what we intended to do when we knew where it would be initially shipped).
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.
4 5 6 7 FUSES: B+ MAINS IEC MAINS IN Tube Location & Type OUTPUT TUBES: 10 x EL34 (250W) or 10 x KT90 (500W): The EL34 types we recommend are the Sovtek EL34G, EL34G+, EL34WXT, Electro-Harmonix EL34EH or the JJ EL34GT as supplied to us by our pals at Groove Tubes.
FRONT VIEW OF AMPLIFIER WITH INSERT REMOVED SHOWING BIAS MEASUREMENT POINTS AND BIAS ADJUST POINTS 1 2 3 4 5 6 7 8 9 10 OPERATE STANDBY EVER-WARM SOFT START SWITCH MAINS POWER ON / OFF SWITCH GROUND M.
OPERATIONAL NOTES SWITCHING ON -- SOFT START The MANLEY NEO-CLASSIC 250's & 500's are equipped with a SOFT-START circuit which reduces the cold-start current draw which makes things easier for your house breakers and the poor tubes and capacitors in the amps.
The Manley 250 & 500 watt Amplifiers use a fixed bias system that requires very little attention. The term "bias" as used here refers to an externally adjustable voltage applied to each of the output tubes grids. This voltage sets the correct current draw for each output tube.
REPLACING TUBES (Also refer to page 6) How long will these tubes last? We can't say for sure. Some die prematurely and some tubes last more than 30 years. The average for the tubes in the 250's & 500's seems to be 4 to 5 years depending on usage.
It is rare that any of these problems occur but if they do here are some things to try. HUM - Try a mains ground adapter if they are legal in your country. They are also called 3 pin to 2 pin adapters or "cheaters" and are available in hardware stores.
SPECIFICATIONS (250W) ALL-TUBE monoblock design: uses 10 x EL34JJ output tubes Driver Stage: High current double 12BH7EH (x2) Input Tube: 12AT7WA Ei large plate BALANCED & UNBALANCED inputs: RCA a.
SPECIFICATIONS (500W) ALL-TUBE monoblock design 10 x KT90 or 6550C output tubes High current double 6414W driver stage 12AT7EH large plate Electro-Harmonix Russian input tube BALANCED & UNBALANCED.
Manley Laboratories, Inc. WARRANTY STATEMENT effective 1/2006 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.
WARRANTY REGISTRATION We ask, grovel and beg that you please fill out this registration form and send the bottom half to: MANLEY LABORATORIES REGISTRATION DEPARTMENT 13880 MAGNOLIA AVE.
Amplifier Pre-packing Instructions: Step 1: Remove the perforated top cover. Use a #2 Phillips screwdriver to remove nine philips 6-32 screws: Three per side, two on the top, and one in the back of the cage, in front of the two big B+ capacitors.
An important point after buying a device Manley Labs AMPLIFIERS (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Manley Labs AMPLIFIERS yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Manley Labs AMPLIFIERS - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Manley Labs AMPLIFIERS you will learn all the available features of the product, as well as information on its operation. The information that you get Manley Labs AMPLIFIERS will certainly help you make a decision on the purchase.
If you already are a holder of Manley Labs AMPLIFIERS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Manley Labs AMPLIFIERS.
However, one of the most important roles played by the user manual is to help in solving problems with Manley Labs AMPLIFIERS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Manley Labs AMPLIFIERS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
