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3.1
Turn-On
n-Turn-Off
For about fo
our seconds
after turn-on
3.2
Short c
ircuit prot
A short circ
cuit protectio
n system sa
stressful loa
ads. It is com
mpletely inau
will be illum
minated. The
amplifier pro
for normal u
use after 2 s
seconds. If t
seconds un
til the short i
s removed.
3.3
Therma
al protectio
The MA2.8Q
Q amplifier u
uses a conti
response to
o the amplifie
er's cooling
the "TEMP"
" LED illumin
nates and the
temperature
e rises above
e 85°C the th
heatsink ha
as cooled be
elow 85°C th
until the tem
mperature h
has dropped
power.
3.4
DC faul
t protectio
If DC or ex
xcessive sub
bsonic energ
mute both c
channels of
the amplifier
improving th
he damping f
factor and re
3.5
Input / O
Output pro
An ultrason
ic network de
ecouples RF
All material © 2
2010 Martin Aud
dio Ltd. Subject
3
Prote
f muting
n, and immed
diately at turn
tection
afeguards the
e amplifier's
udible when i
inactive. In th
otection has
an auto res
the short circ
cuit is still pr
on
nuously vari
iable speed
requirements
s). If the hea
e output pow
wer is reduce
hermal sensi
ing circuitry w
he amplifier w
will automati
to 75°C. It
is possible
on
gy appears a
at a channe
r. The ampli
fier shutdow
wn is used in
eliability of th
e MA2.8Q.
otection
F from the ou
utputs and ke
t to change with
hout notice
ection
n-off, the am
plifier output
output trans
sistors under
he event of a
a short circu
et mode wh
ich will attem
mpt of reset
resent the a
mplifier will a
fan to assis
t cooling (th
he fan speed
atsink tempe
erature reach
ed to prevent
t damages to
will mute eac
ch channels
ically un-mut
te but the T
TEMP LED w
to reduce th
he temperat
l output, an
instantaneo
ous protectio
nstead off of
eeps the amp
plifier stable w
ts are muted
.
r short circui
ts and other
r
it condition,
the red LED
D
the amplifier
r
attempt to re
eset every 2
2
d changes in
n
hes approxim
mately 75°C,
,
o the output
stage. If the
e
power sectio
on. Once the
e
will remain lit
t
ture reducing
g the output
t
n circuit will
speaker rel
ays, thereby
y
with reactive
e loads.
12
l
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