Orion 220gx Installation Manual page 13

-15V-
LEFT-
/'CT'V^-1 5V
..
-AUDIO
GROUND
ORION 300 PRO
PRE AMP EQUALIZER
or
ORION 600 EQM
EQUALIZER
or
ORION 500 PMQ
PARAMETRIC
EQUALIZER
DIN CONNECTOR
All ORION Accessories and
Amplifiers have this DIN
configuration.
"Phantom Power (+15V & -15VI is supplied to all
ORION accessory modules by the amplifier through
the DIN cable. (When ORION amplifiers are not
used, the ORION PPS 100 Phantom Power Sup¬
ply is required.)
SUBWOOFERS
HIGHS AMPLIFIER
MID/HIGH
FREQUENCY
SPEAKERS
1
This is a simple two-amplifier system using a 200 CRX
Active Crossover for better control of the frequencies
applied to the speakers. The LOW FREQ output is con¬
nected to the lows amplifier to drive the subwoofers,
and the HIGH FREQ output is connected to the highs
amplifier for driving the midrange and highs speakers.
This allows you to carefully balance the higher and
midrange frequencies with the lows. In practice, over¬
lapping the crossover point slightly results in smooth
transitions of sounds delivered to the speakers. For
example, the cutoff frequency for lows could be ad¬
justed to 400 Hz. This would mean that all frequencies
below 400 Hz would be passed to the lows amplifier at
100% power. The attenuation {reduction in power) is
12 dB which is a reduction in power of about 90%. An
octave is a doubling of frequency so that at 800 Hz
only about 10% of the power would go to the sub¬
woofers. In this example, the high output would be ad¬
justed to pass only frequencies above 300 Hz. This
would give you about 100 Hz overlap. Then you could
make slight adjustments to provide the sound that
pleases you the most.
This system could be designed using two 240gx 2-chan-
nel amplifiers (40 watts per channel} or two GS 100
2-channel amplifiers. For added power, you could
choose two 280gx 2-channel amplifiers (80 watts per
channel), two GS-1000 2-channel amplifiers (100 watts
per channel), or a single 4100gx 4-channel amplifier
(100 watts per channel).
For installation, connections and adjustments, refer to
pages 26 through 35.
Speaker impedance could be 4 to 16 ohms.
Figure 5. Two-Amplifier System Using an ORION 200 CRX Active Crossover