Digital Audio Products 4.8SP 3.6SP 24 Bit System Processor Operating Manual ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (585) 872-0010 Toll-Free: (800) 828-6308 Fax: (585) 872-0739 www.ashly.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors Table Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Audio Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors Protea 4.8SP Protea 3.6SP 1 0 The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 1. INTRODUCTION Thank you for your purchase of this Ashly Protea 4.8SP or 3.6SP Digital Crossover/System Processor. The Protea series builds on the tradition of quality and value which has earned Ashly its place as a market leader in crossovers, equalization, and signal processing. The 4.8SP has four inputs and eight outputs, while the 3.6SP has three inputs and six outputs.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 4. FRONT PANEL CONTROL FEATURES 4.1 Function Keys and Data Wheel To the right of the LCD display are two unlabeled function keys and a rotary data wheel. All audio and system parameters are edited using these three controls. Each of the two lines of text on the LCD display correspond to a dedicated function key, so that various tasks on both lines may be selected using their respective keys.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 4.6 Audio Functions 4.6a Gain GAIN A 0.0dB Input and Output Gain are separately adjustable from -40dB to +12dB in 0.1dB increments. The output gain menu also provides for selection of input source(s) for a given output channel, as well as GAIN 1 Source:A polarity of the outgoing signal. Any in0.0dB Pol:Normal put or combination of inputs can be routed to any or all outputs.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors down and eliminate problem feedback frequencies, add or remove a characteristic "hot spot" from microphones, or clean up room resonance situations. It is well worth the time getting proficient with parametric EQ filters, as they offer the best solution to many EQ problems. Protea SP parametric filters have a boost/cut range of +15dB to -30dB.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors Input (Long) Time Delay For Remote Speakers Speaker on Main Stage Secondary Speaker 200 ft from Main Stage Same sound arrives at two different times. Fix by delaying secondary speakers 177mS. Output channels have time delay as well. Output delay is best used to align discrete drivers within a speaker cabinet or cluster, normally quite close together.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors Butterworth Butterworth filters individually are always -3dB at the displayed crossover frequency and are used because they have a "maximally flat" passband and sharpest transition to the stopband. When a Butterworth HPF and LPF of the same crossover frequency are summed, the combined response is always +3dB.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors while a very long attack time can miss some of the initial transient. Similarly, a very short release time can make the audio sound uneven, while a very long release time can create "pumping", or "breathing" characteristics depending on the kind of signal. Experiment to find the best solution for a given application. 4.7 Other Functions The Protea 4.8SP and 3.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 4.7e Util The Protea 4.8SP and 3.6SP utilities include a security section for password protected lockout, a dBu/VU meter preference select, and a device name display. UTIL Ref:dBu Secur:Off(none) Device-Name Security There are four security modes in the 4.8SP and 3.6SP: Off, Preset Lock, Parameter Lock, and Full Lockout.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 5. INTERCONNECT FEATURES 5.1 Audio Connections All Protea audio connections use three pin XLR jacks, with pin 2 (+), pin 3 (-), and pin 1(G). Inputs and outputs are electronically precision balanced. If an unbalanced signal is fed to an input, the signal should be on the (+) connection (pin 2) and pin 3 must be tied to ground, or significant signal loss will result. In other words, never float pin 2 or pin 3.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors been formerly installed but are currently off-line or unavailable show up in red. Individual products can be dragged onto the project canvas to simulate physical rack installation groups, but editing each product can be done from either the product list or the image on the canvas.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 7. TROUBLESHOOTING 7.1 - Audio Troubleshooting Tips No power - Is the detachable AC cord fully plugged in? Is the rear panel power switch on? Controls don't work - check the Security Level. If set to Full Lockout, then Protea unit is "view only". Change security settings in Util menu or software. No sound - Check to see if the input or output is muted.
Operating Manual - PROTEA 4.8SP and 3.6SP System Processors 18dB/Oct Bessel, 18dB/Oct Linkwitz-Riley 24dB/Oct Butterworth, 24dB/Oct Bessel, 24dB/Oct Linkwitz-Riley 48dB/Oct Butterworth, 48dB/Oct Bessel, 48dB/Oct Linkwitz-Riley Limiter Threshold Range . . . . . . . . . . . . . . . . . . . Ratio Range . . . . . . . . . . . . . . . . . . . . . . . Attack Time Range . . . . . . . . . . . . . . . . . Release Time Range . . . . . . . . . . . . . . . . Input Meter LEDs A/D -20dBu to +20 dBu 1.2:1 to INF:1 0.
Operating Manual - PROTEA 4.8SP and 3.
