p-4
Unpacking
Introduction
Thank you for purchasing the Fostex PM841
/ PM641 Professional Studio Monitor. As with
all Fostex products, the PM841 / PM641 has
been designed to provide superlative perfor-
mance, unquestioned reliability and excep-
tionally high value.
Dedicated 60W (50W: PM641) power
amplifier for 8” (6 1/2”: PM641) woofer,
18W for 4” midrange and 18W for 3/4”
tweeter are individually built-in for high
efficiency and low distortion playback.
The built-in channel divider provides ideally
overlapped frequency crossovers for
smooth connections between the drivers.
Prior to unpacking your Fostex PM841 / PM641 Studio Monitor, carefully inspect the packing mate-
rial for excessive damage. Once it has been determined that the packing material has not been com-
promised, carefully unpack the PM841 / PM641 Studio Monitor and inspect it carefully for obvious
damage. Fostex takes great care in designing packing materials that will survive most expected
impacts during shipping. If any damage is discovered during the inspection process, contact your
Fostex dealer so that this issue can immediately be addressed.
The midrange and tweeter drivers are positioned symmetrically on the Left and Right to minimize
the physical height of the enclosure boxes as well as to minimize the affect of diffraction.
The woofer and the midrange drivers are housed in an individual chamber respectively. The
woofer driver delivers rich and speedy lows in the two-ported bass-reflex chamber. The midrange
driver delivers quality middles in the closed chamber. As the tweeter driver is also sealed struc-
ture itself, there is little interference among the drivers for ideal driving environment.
3-step level adjustments are provided for HIGH FREQ at +1/0/-1 dB and LOW FREQ at +3/0/-3
dB.
The diaphragm for the woofer and midrange is highly rigid with moderate internal loss being made
of highly elastic Kevlar papered by Fostex’s original engineering to perfectly reproduce pulsing
music to sensitive one.
The tweeter diaphragm is UFLC (Urethane Film Laminated Cloth) soft dome type to reproduce
various types of highs keeping its own transparency.
The PM841 / PM641 conforms to ErP directive and pursues energy efficiency. Thus, when
no-signal condition continues for about 25 minutes, it will automatically go into the stand-by mode
and its power withdrawal will become less than 0.5W. During this mode, the power LED color will
change from Blue to Red.
Please take the time to thoroughly read this manual so that you may take full advantage of all the
benefits of the Fostex PM841 / PM641 Professional Studio Monitor.
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PM 841 LEFT CABINET
PM 841 RIGHT CABINET
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