Ashly FET-I500C User manual

PowerAmplifiers
modelFET-I500M
modelFET-I500C
FET.1sOOM
FET-1500C
shly, the first professional
audio
manufacturer
torelease
a MOS-FET
power
amplifier,
isproud
tointroducethenext
generation,
the FET-I500
Series. During its first
decade,our original
FET
Series
became
astandard
for
applications
requiring
the
utmostinsonic
excellence
and extreme
reliability.We
now improveupon that reputation by
offeringmoremodels
with
betterspecifi-
cationsthan
everbefore.
TheFET-1500
series
is offeredintwo
variations:
The FET-1500MfeaturesLEDmeters
andbalanced
XLRor 1/4"
inputs.
This
design
isintendedfordemandingsound
reinforcement,broadcastfacilities,re-
cordingstudios,
oranyapplication
where
visualmonitoring
and
interfacingwithbal-
ancedequipment
isessential.
TheFET-1500Gis
designedtomeet the
needsof professional
industrialinstalla-
tions
suchastheater,
public
addressand
stadium
use.Inthesesituations
meters
and
XLRinputsare
not
typically
required,
so the FET-1500Cis supplied
without
metersandutilizesbarrierstripand1/4"
inputs.
This
amplifier
provides
allofthe
same performance
benefits as the
FET-1500Matalower cost.
TheFET-1500series
representsAshly's
ongoingdedication
to extendingthe
boundaries
oftechnology.Simple,stable
circuitry
produces
bettersound.
Ashly
MOS-FET
amplifiers
usea complemen-
tary,all-discretedesign.
The
driver
is
pure
class-Aand, because
it has onlytwo
stages,
requireslittle
compensation
allow-
ing both speedand linearitywith no
crossover-notchdistortion.
The
outputstageconsists
ofparalleled
power
MOS-FETsfor current
gain.
The
MOS-FETshave smoothtransconduc-
tancecurvesand
run
ata relativelyhigh
idlecurrent,again
preventing
crossover
notch
distortion.
They
require
nodissipa-
tion-limiting
protective
circuitryand pro-
videvirtuallyinfinite
powergain,
keeping
load reflectionsfrom the driverstage.
This
promotes
stabilityand
low
distortion
when driving reactiveloadslike loud-
speakers.
Specialattention
is paidto overload
performance;
whenanAshlyamp
is
over-
driven,
it will
clipcleanly
witha slightly
roundededgetotally
freefrom
spikes
and
glitches.
Totalimmunity
to power supply
variationsinsuresthat transientdistor-
tionsare never
generated
on program
materialwithwidedynamic
range.
Theresult:
powerful
and
quick
ampli-
fiersthatdeliverunrestrained,uncolored
sound
quality
withremarkable
accuracy.
EachAshly
power
amplifier,
like
all
Ashly
products,
is now fully coveredby our
exclusive
five-year
worry-freewarranty.

ifications Architect's
Specif
ication
Ashly Model l5O0M
The power amplifier. being oftwo channels, shall deliver a
minimum power oI 175 watts per channel into 8 ohm
loads or 275 watts per channel into 4 ohm loads with both
channels operating. When switched into bridged mono
node. it shall deliver at least 550 watts into m 8 ohm
load. The amplifier shall be immune to damage from
shorted. open, or mismatched loads. The amplifier shall
have a gain of 29dB t .5dB per channel and an input sen-
sitiviqr of 1.3 Volts ! 20/olor lull rated output. Frequency
responseshall be 10HzIo 2OkHzt .5d8. It shall be stable
into any load including pure capacitors and inductors.
Hum and noise shall be at least 110d8 below full output
and SMPTE intermodulation distoftion shall be less than
.010/oat full output. The amplifier shall have rear panel
switching for mono and bridging modes and rear mounted
level controls. The inputs shall be balanced bridging type
with male and female XLR type connectors as well as 1/4"
phone jacks. A three-color LED type indicator shall be
employed to show the power level of each chamel and self
contained forced air cooling shall be used. The power out-
put devlces shall be of the Lateral MOS FET fpe. The
anplifier shall lveigh 371b. net and mount in a standard
19 inch rack using two spaces (3.5" high). The power
requirement shall be 110 125VAC.
50 60H2.
The porver amplitier shall be an Ashly FET-1500M.
Ashly Model 1500C
'Ile power amplilier, being of two channels, shall deliver a
minimum power ol 175 watts per channel into 8 ohm
loads or 275 watis per channel into 4 ohn loads wiLh both
channcls operating. When switched into bridged mono
mode. it shall deliver al leasi 550 watts into an 8 ohm
load. The amplifier shnll be imntune to dam:rge liom
shoried, open. or nisnratched loads. The amplifier shall
have a gain oi29dB t .SdB per ch:rnnel and an input sen-
sitivily of 1.3 Volts t 20/olor ltll rated output. F-requency
responseshall be 1OLIzto 2OkHz,t .5dts.It shall be stable
inlo irny lo:rd inclllding pure capacitors and inductors.
IIum :rnd noise shall bc at lcast I 1Odtsbelow llll output
ancl SMPI'E intermodulation clistortion shall be less than
.010/oat Iull output. Thc amplilier shall have rear panel
swikrhing lbr rrono and bridgine modes and rear ntounted
levelcontrols. The inputs shall utilize 1/4' phonc.jacks as
well as terminal/barricr input strips. Sell conLait.redlbrced
air cooling shall be used. 'l'he porver output dcvices shall
be ol the Lateral MOS-FET type. The nmplilier shall weigh
371b.
net and mouni in a stanclard l9 inch rack usinq two
spaces (3.5' high), The power requirement shall be 110-
l2SVAC. 50-60H2.
The power amplilier shall be an Ashly FET- I 500C.
AshlyAudioInc.
100Fernwood
Avenue
Rochester,NewYork14621
TollFree
(800)
828-6308
InNYS
(716)
544-5191 Since
1972
O 1989Ashly Audio
lnCanada:
GerraudioDist
363
Adelaide
StreetEast
Toronto,
MsA1N3
(416)
361-1667
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