Manley MAHI MONOBLOCK AMPLIFIER - Manual (Page 3)

INTRODUCTION
THANK YOU!...
for choosing the Manley MAHI monoblock amplifiers for your loudspeaker driving requirements. You have possibly
chosen this product because you auditioned it in a store or heard it at a hi-fi show and were impressed with the sound.
It may have been the right combination of price, power, features and styling for you. It may have been because you
know the Manley Labs reputation for quality, reliability, and integrity. If any or all of these were the reasons, you
made a good choice and for that, we thank you.
The MANLEY MAHI is designed to bring unbalanced RCA-type line inputs up to speaker-driving levels in the
simplest and most direct way possible. This is accomplished in only three active stages through the judicious use of
vacuum tubes, whose purpose-designed applications in audio amplification are pressed to full advantage here.
The MAHI’s circuitry contains many subtle and overt refinements that promote uncolored and revealing musical
reproduction of the input signal. The MAHI is a follow-on model from our previous "50 watt monoblock" model
which was a monoblock version of our famed STINGRAY stereo integrated. The name "50 watt monoblock" and its
chassis got somewhat boring and dated after awhile, so new for 2003 we brought this wonderful little champ up-to-
date with our current direction in clever styling while retaining the circuitry basically as it was as to not screw with
success. But doncha know, we couldn't resist making a few improvements...
The MAHI now features Triode-Ultra Linear mode switching as standard whereas before it was a state secret option
on the 50's. Now you can choose whether you'd like to be seduced by a sweet 20 watts of triode operation or whether
you prefer the ballsy-er control of 40 some-odd watts of UL. The other switch on the top deck is a Variable Feedback
switch allowing the user to choose how much negative feedback is being applied to the amplifier for sonic variation
and optimisation of speaker-to-amplifier interface. New for the MAHI we greatly increased the B+ capacity with a
hefty bank of 1200uF filter caps. This now provides for nearly 180 Joules of energy storage which audibly equates to
tighter and more rock-solid authority in the bass region. The MAHI’s output transformer is built right here in our own
Manley Magnetics department and is the same one used in the acclaimed Stingray. Low levels of noise, distortion, and
negative feedback are partnered with the naturally high dynamic range of tube electronics which makes the MAHI
really jump to life.
Please read over this entertaining and enjoyable owner's manual carefully as it contains information essential to the
proper operation and maximum enjoyment of this instrument. Many of the remarks contained herein are especially
pertinent if the MAHI is to be your first long-term encounter with a vacuum tube power amplifier.
Thank you again, and please enjoy your new Mahis! (and the clever Owner's Manual.)
UNPACKING: Unpack the amplifiers carefully by removing all the custom foam packing material and make sure that
all supplied accessories are present. Carefully examine all items for any possibility of shipping damage. All of the
tubes are already installed and should have survived the journey protected by their very own grey foam insert. They
should be standing at attention in their sockets, and should show no signs of distress such as chipped glass, loose
internal components or obvious breakage. If the amplifier is damaged or fails to operate, notify the shipper or your
dealer or us or your local authorities immediately. Or if you suspect The Shipping People threw it off the airplane and
onto your front porch whilst flying overhead at 30,000 feet, notify the shipping company without delay and complain
to them as we only guarantee this unit to be able to survive a drop of 23,487 feet or less.
Your MAHI's were packed by Manny Q. with extreme love and each box includes the following components and
accessories:
a) 1 each, 6 foot IEC 3-conductor power cable
(that you will probably replace with an expensive audiophile cord anyway.)
b) 1 each, Owner’s Manual per pair (that we hope you will keep reading.)
It is prudent to retain the shipping materials for future use, as they are custom-formed for the amplifier and
will greatly minimize the chance of shipping-related damage should you ever need to put your precious
MAHI's in the careless hands of The Shipping People again. We have heard that certain rodents might enjoy
munching on the packing foam. We are sorry to report that we do not warranty the packing foam against
attack by mice, rats, or other hungry critters, hungry children, hungry neighbors, etc. Try glue traps or
spring-traps loaded with peanut butter to eliminate these unwelcome freeloaders from your property.
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