Protea 4.8SP

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Our Protea System Processors (SPs) with DSP deliver premium sonic performance with an intuitive and user-friendly software platform.  The 4.8SP (4-in x 8-out) is a great choice for both live sound and use in fixed installations like worship facilities, schools and performance spaces.  Use the full Protea DSP Suitecrossover, equalization, compressor/limiter and delaywith up to 682ms on the input and the output, SPs serve as a front-end processor for delay stacks. 

SPs have front panel controls for immediate access to the settings during a dynamic, live performance.  The front and rear panel USB ports allow you to program the processors via Ashlys Protea Softwareand set a password-secured security system to prevent unauthorized tampering. 

The 4.8SP is the 4-in by 8-out model.  With active front panel controls, SPs are at home in a dynamic, live sound environment.  The USB inputs (front and rear panel) provide set-up via Protea Software, making SPs a great choice for permanent installations. 

A backlit 2 x 20-character LCD displays channel and function settings.  Dedicated front panel controls provide access to all audio functions and system tools.  There is a rear panel RS-232 port in addition to the USB ports. 

Advantages of using the software include greater preset capacity, and a very intuitive visual representation of the audio routing and control process.  A 6-foot (1.8m) USB-A to USB-B cable is provided.

More Information
Manufacturer Ashly
  • Front Panel Parameter Control
  • Single rack space with XLR audio connections
  • Extremely intuitive user interface
  • Crossover, EQ, delay and limiter functions
  • Outputs assignable to any input
  • Front panel or PC programming and control
  • with 4 levels of security
  • USB and RS-232 interface
  • Third-party control friendly
  • Balanced inputs and outputs
  • Linkwitz-Riley, Bessel and Butterworth filters
  • 12, 18, 24 and 48dB/octave slopes
  • Parametric EQ: 1/64th to 4 octave range
  • 682ms input and output delay (1,364ms total)
  • Limiter on each output
  • Individual input and output metering
  • Safety/Compliance: CE, FCC, RoHS

Particular Specification
Input Active Balanced, 18k Ohms
Input Level +20dBu (Max)
Input Gain Range -40dB+12dB
Output Active Balanced, 112 Ohms
Output Level +20dBu (Max)
Output Gain Range -40dB+12dB
Unit Weight 3.3kg
Shipping Weight 5kg
Environmental 4C49C
Dimensions (H x W x D) 89 x 483 x 216mm
1.75 x 19 x 8.5
AC Requirements 100240VAC, 50/60Hz, 20W
EQ Filter Types 1st or 2nd Order High or Low Shelf, Parametric
Shelving Filter
Boost/Cut Range
Shelving Filter
Frequency Range
Low Shelf: 19.7Hz2kHz,
High Shelf: 3.8kHz21.9kHz
Parametric Filter
Boost/Cut Range
Parametric Filter
Frequency Range
19.7Hz21.9kHz, 1/24 Octave Steps
Parametric Filter Bandwidth Four Octaves to 1/64 Octave
Input/Output Delay 0682ms
HPF/LPF Frequency Range 19.7Hz21.9kHz, Off
Available Filter Types 12dB/Oct Butterworth
12dB/Oct Bessel
12dB/Oct Linkwitz-Riley
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
Threshold Range -20dBu+20dBu
Ratio Range 1.2:1 to :1
Attack Time Range 0.5ms50ms
Release Time Range 10ms1Sec
Frequency Response 20Hz20kHz, 0.25dB
Dynamic Range >110dB, 20Hz20kHz unweighted

Manual (2.04 MB)