Ashly Parametric Equalizers SC-66A - Manual (Page 2)

At the heart of the SC-66A is a unique bandpass filter
circuit. Basically a "state-variable" type, this filter is
trimmed and optimized to provide excellent trans­
ient response and a wide range bandwidth adjust­
ment. Each filter in the SC-66A can be tuned over a
50:1 frequency range (about 5 1/2 octaves) and a
70:1 bandwidth range with no more than a 2 dB
amplitude error at center frequency. At its sharpest
setting, the filter has a "Q" of about 35 and gener­
ates a response curve with 3 dB points only 1/20
octave apart, making feedback control possible
with no audible side-effects. The filters are manu­
factured as Individual, plug in units to make servic­
ing easy.
Each filter is placed in the feedback loop of a
summing amplifier to produce the desired frequency
response. Since a separate summing amplifier is
used for each band, no interaction between bands
occurs. A husky output stage is provided so that low
impedance loads and long cables may be driven
easily.
CONTROLS
Master
Master Gain
Master Defeat Switch
Per Band
Amplitude
Defeat Switch
Frequency
(low)
(low-mid)
(hi-mid)
(high)
Bandwidth
INPUT IMPEDANCE
i15dB
l 15 dB
16HZ-800HZ
48Hz-2.4kHz
160Hz-8kHz
480Hz-24kHz
3 1/3 ocf - 1/20 OCt
10k n active balanced
bridging
SPECIFICATIONS:
OUTPUT IMPEDANCE
MAX. IN-OUT LEVEL
FREQUENCY RESPONSE
DISTORTION
HUM AND NOISE
POWER
SIZE
SHIPPING WEIGHT
50a .term with 600n
or more
• 20dBm ( » 5 dBm at max.
boost, full sharp)
±.5dB 20Hz-20kHz
<.05% THD, HOdBV
20Hz-20kHz
-87dBV (eq in) -95dBV
(eq out)
120 VAC, 50-60HZ, 5W
19"L X 51/4"H X 6"D
12 lbs.