P.I.P.–AMCb
Page 18
4 Specifications
Signal to Noise Ratio: Greater than
85 dB (equivalent input noise) from
20 Hz to 20 kHz.
Common Mode Rejection: Greater
than 90 dB at 60 Hz; greater than 60
dB at 20 kHz.
Crosstalk: Greater than 46 dB below
the signal level at 20 kHz.
Harmonic Distortion: Less than
0.05% THD at 1 kHz with any setting
and no compression. Less than 0.5%
(either channel) at 800 Hz crossover
with 6 dB of compression.
Input Impedance: Nominally 50
kohms balanced and 25 kohms un-
balanced.
Maximum Input Level: +18 dB at
mid-band. Other bands will vary with
equalizer amplitude boost.
Nominal Gain: Unity ±0.5 dB.
Crossover: Linkwitz-Riley, 24 dB/oc-
tave with state variable topology.
Crossover frequency: 80 Hz to 8 kHz,
controlled by plug-in SIP resistors;
Factory set to 800 Hz with options of
500, 1200, 1600, 2000 and 2400 Hz
using the provided SIPs (others avail-
able on request).
Low-Frequency Equalization: 2nd
order high pass filter with Q=2 for
classic Thiele–Keele B
6 vented sys-
tem alignment. Boost: +6 dB. Roll-off:
2nd order below boost (set by filter).
Boost frequency: selectable as 20,
24, 28, 30, 36, 38, 42, 44, 56, 65, 68,
102, 120, 180 Hz or flat using 9-seg-
ment DIP switch.
High-Frequency Equalization: 1st
order shelving network for “constant-
directivity” horn equalization. Select-
able boost frequency (+3 dB): 1.8,
2.2, 2.4, 3.2, 4.0, 6.8, 10.0 kHz or flat
using 9-segment DIP switch. (Band-
width determines total boost—see
Figures 3.7a and 3.7b.) Boost roll-off:
2nd order above boost. Selectable
upper limit roll-off: 12, 15, 16, 18, 22,
25, 26, 28 kHz using 9-segment DIP
switch.
Compressor: Driven by the audio
and the
IOC
®
error signal. Threshold:
adjustable in nominal 2.5 V steps
from 8 to 164.5 VRMS using 6-seg-
ment DIP switch. Dynamic Range:
Greater than 16 dB. Low Frequency
Compressor: 10 msec attack with
360 msec decay. High Frequency
Compressor: 5 msec attack with 180
msec decay. Compression Ratio:
∞:1.
Connectors
Input: Balanced female 3-pin XLR.
Output: Balanced male 3-pin XLR.
Maximum Output Level: +18 dB
(into a 600 ohm load).
Power Requirements: When plug-
ged into a Macro-Tech,
Com-Tech
®
or
Studio Reference
TM
amplifier, the
P.I.P
.
receives ± 24 V power.
Dimensions: 6
3
⁄8 x 1
7
⁄8 x 3
7
⁄8 in (16.2
x 4.8 x 9.8 cm).
Weight: 10 ounces (284 grams).
Note: All specifications are refer-
enced to a 0.775 V input signal.
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