ASHLEY SC-77 Black Version Stereo 3 Way Electronic Crossover Instruction Manual
- June 13, 2024
- Ashley
Table of Contents
ASHLY AUDIO, INC
SC77 STERE 3-WAY ELECTRONIC CROSSOVER
SC-77 Black Version Stereo 3 Way Electronic Crossover
The SC-77 Stereo Three-Way Electronic Cross-over is designed to fill the needs of modern high power sound systems. Crossover points and rolloff are continuously adjustable and individ-ual output stages with wide range gain adjust-ments will drive long cable runs and accurately match any power amplifiers.
FEATURES:
- 12 dB per octave slopes
- Logical control layout
- Both the inputs and outputs can be used balanced or unbalanced
- Flat summing
- Rugged 16 gauge steel chassis
- Peak overlaod warning lights
- In-phase outputs
- Our exclusive rolloff control to flatten frequency response at the crossover point
- Optional 5-way mono operation
The SC-77 uses state variable
filter circuits to perform the frequency divisions. These filters provide
simulta-neous low-pass and high-pass outputs. Two filters are cascaded for
three-way operation. Inverters are included on the mid outputs to keep
everything in-phase. A “0” adjustment (called falloff) is included for
adjustment of frequency response in the cross-over region. This allows flat
summing and in-phase outputs.
The output stages have a wide range gain adjust-ment with a special feedback
level control circuit to maintain an optimum signal-to-noise ratio at any
setting.
A special electronic power monitor for the output stages prevents turn-on
transients without the use of relays.
Both inputs and outputs can be used as balanced or unbalanced and a peak
overload circuit monitors all critical points in the circuit to insure low-
distortion operation.
SPECIFICATIONS:
CONTROLS
Input level – ∞ -+ 10dB
crossover frequencies – 48Hz-2.4kHz 480Hz-24kHz
rolloff – 1.5dB-12dB
(crossover point depth)
output level – ∞ -+ 20dB
INPUT IMPEDANCE – 10k 12 balanced bridging
OUTPUT IMPEDANCE – 50 12 unbalanced – terminate with 600 Ω it or more. Turn
on transient protected.
MAX. IN-OUT LEVEL + 20dBm
FREQUENCY RESPONSE ± .5dB 20Hz-20kHz (within passband)
DISTORTION < .05% THD, + 10dBV 20Hz-20kHz
HUM AND NOISE (all outputs) -90dBV input and all outputs unity gain, frequency
and rolloff at center rotation.
POWER – 120 VAC, 50.60Hz, 5W
SIZE – 19’1 x 3 1/2″H x 6″D
SHIPPING WEIGHT – 10 lbs.