Introducing ten new amplifiers, all made in the United States of America. Orbiting Planet Audio are eight 2-Channel
amplifiers, a pair of 4-Channel amplifiers, and a
P502, P1002, P1502, P2502 and P225HC feature a pair of individually-adjustable high and low pass crossovers, a
low frequency variable boost control, independent routing switches for both the amplifier and line out sections.
In addition, the low and high pass crossovers can be cascaded to form a
triamplified systems.
Models HVT752, HVT7100 and HVT7150 have identical features to the above amplifiers, with one addition - the
main preamp features a pair of vacuum tubes as its active elements.
One
of
the four channel amps, P704, has three sets of crossovers, two high pass and an 18 dB/octave low pass. Of
course, all are independently adjustable. Selector switches allow both pairs of channels and the line output to pass
flat frequency, high and low pass signals.
crossover.
HVT754 is identical to the P704 with the addition of the vacuum tube front end.
The P706 is an extremely flexible amplifier. Four crossovers allow this unit to perform many different functions.
One pair of channels is controlled by a high pass crossover. The second pair is controlled by both a high and a low
pass crossover, so a
bandpass function can be achieved. The last pair have a 24 dB/octave low pass crossover.
A
516 Channel unit.
I
bandpass (midrange) section for use in
I
I
low frequency variable boost control is "married" with the low pass
I
I
I
Planet
Audio.
Page 4
Features
@
All power supplies are quasi-regulated.
@
Protection circuits include short-circuit,
D.C.,
thermal and reverse polarity.
circuits.
dio circuits.
main rectifiers.
in power supply switches.
Linkwitz Riley and Butte
bass response.
7
KC couplied and run in Class A mode.
oy high current MOSFETs in all output stages.
r
structured power~ections increase noise immunity.
printed circuit cards are used on all amplifiers.
A
Page 5
-m
into
2
Ohms
16
x
2
150x2 220x2
35Qx3
100x4
80x6 80 x 2
I50x 2 220x2 lhx4
h~ridge~ower
into
4
Ohms
B&hurn
Speakor
Imxl
-
--.-
Impendance
hput
Impedance
@pse Response
310Q~2
-
Ohm
440x1
1
Ohm
700x1
1
Okrm
2
Ohm
Lagging
•
Less
15
*Z
Rdng
than
Ohm
shm
is
0.02%
Degrees
@
1
for
Channels
20
KHz
Ohm
1-4.
1
Ohm
Channels
5
and
2
1
Ohm
6
can
wept
I
Ohm
Ohm
loads.
0.25
Ohm
Fuse
Rating:
15A
WA
4OA
@A
36A
40A
1SA
40A 40A 35A
60A
Page 6
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I
Find a suitable location in the vehicle to mount the amplifier.
1
2
Make
3
Bolt the amplifier to the mountin
sure there is sufficient air flow around the intended mounting location.
---,
~oint on the chassis of
:ngth. Use 8 gauge
the
wire.
car.
i
13
once
2-
,
,ock
?el,
r
Q1
connections before powering up.
LL-
pme
system
position, and
-
either run separate cables (each with its own
cable from the fuse holder at the battery to a
le amplifier's location.
F
and outputs using high-quality
.e battery fuse holder(s).
least sensitive positions and set all crossover controls,
iesirec
is
pwerec
frequency or position.
up,
set the volume control on the head unit to about the
set all the amplifiers' level controls for maximum output
ther
I
the head unit using
lof
RCA-RCA
cables.
14
gauge
14
1
-
,kurther
ie$ults,
fine
tuning
of
tt
F
A
arious controls may be necessary to obtain the desired
Page 7
Page 8
Page 9
Page 10
Page 11
Systems
#5
&
6
Mono
Simultaneous
Bridge Mode
Y ADAPTOR
TO MONO SIGNAL SOURCE
StereolMono
Mode
+-+-
MINIMUM
2
OHM IMPEDANCE
Set
controls for the particular application.
rum
rwtr,
IIl
Cr--
"'
-1
F
to REMOTE OUTPUT
from HEAD UNIT
LL-
to BAlTERY
un
-m
0"-
-
s.
=
-
(€3
=
GROUND
@
to
OUTPUT
of HEAD
UNIT
LOW PASS
PASSIVE
CROSSOVER
to REMOTE OUT1
from HEAD UNIT
I
1
WOOFER
'UT
Page 12
1
4-Ehannel
Biamp
Mode
r.
!,
--
to set
p~fer
level.
,.,.I
to
High
to
required
Midmeeter
A
Pass.
crossover frequency.
1
WOOFERS
to
REMOTE OUTPUT
from
HEAD UNIT
Page 13
High
01
4-Channel High Pass
TO
.
.
OUTPUTS
HEAD
UNIT
OF
Mode
FRONT
MlDSfWEETER
REAR
SATELLITES
LL
to
from
to
BATTERY
REMOTE
HEAD
OUTPUT
UNIT
@
--.-
1.
-?--.J;
...
,..
w-
MASTER
3
.
SLAVE
.i
AMPLIFIER
,
SETJINGS
A
Set
1+2
and
3+4
Amplifier Selector Switches to High
Set 1+2 and
Set
1+2 and
3+4
High Pass Crossovers to the desired positions.
3+4
Level controls as desired.
.
.
e,
6
,.
7,
Pas&*,
,
.-.
*.
'
;
WOOFERS
to
REMOTE
from
HEAD
OUTPUT
UNIT
Set Line Selector Switch to Low Pass.
Set Low Pass Crossover to desired crossover frequeiiry.
Set Bass control to suit.
Set the Amplifier Selector Switch to Flat.
The slave amplifier may be run in
The slave Amplifier Selector Switch may also be set to Low Pass, so a
realized by using
both
low frequency crossover controls.
MONO
BRIDGE MODE. Connect the woofer per System
30
dB/octave slope may
#5.
be
Page 14
Page 15
Amplifier will
not
power up*
Check for good ground connection.
Check that remote DC terminal has
'
at least
3v
DC.
Amplifier(s)
gets very hot.
Check that the minimum speaker
impedance for that model is correct.
Check for speaker shorts.
Check that there is battery power on
the
+
terminal.
Check all fuses.
rL'*,A,"
la
L*"L
A,,
411
RCA in~uts to the
Faker leads, and
ifier. If the Protection]
on, then the
Check
;
tpa#
nplifi&
hiss disappears, thea
Donent driving the,
L.7
ail the
am
briefly
its inputs%
I
a
noise
IYP~)
Engine noise
(alternator
whine)
High
squeal
noise from
speakers.
Check that there is good airflow
around the amplifier. In some
applications, an external cooling fan
may be required.
This is caused primarily
quality RCA patch cords picking up
radiated noise. Route
cords away from power wires, and use
only the best quality patch cords.
Disconnect all RCA inputs to the
-
amplifier
plug in the component driving the
amplifier and unplug its inputs.
noise disappears, then repeat until the
component that is causing whine is
found.
It is best to set the amplifier's input
level as insensitive as possible. This
also helps to reduce the audible
alternator whine.
This is almost always caused by a
poorly-grounded RCA patch cord.
if noise disappears, then
all
by
RCA
poor
patch
If
the
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