The PLP428b Signature is a four input, eight output Digital Signal Processor (DSP) intended for use in standalone loudspeaker processor units and system amplifiers for professional audio or high end home cinema. Available in four performance levels and using only the best sounding components available, its unrivalled audio quality and feature set match the highest standards.

All connections on PLP428b Signature are internal multi-pin connectors. To build a full product, additional PCBs are needed with external connectors. See “Accessories” for details.

KEY FEATURES
• 4 inputs, 8 outputs
• dual-channel AES/EBU input
• 96kHz sample rate
• Unparalleled audio quality
• State-of-the-art digital processing
• Programmable User Interface
• Monitoring and permanent logging of key parameters such as temperature, signal level and gain reduction
• 800 FIR taps per output
• 250 presets
• Optional Dante and AES67 module available
• Prepared for AVB / MILAN (coming soon)
• Multiple display and GPI / GPO support
• Optional Tilt Sensor
• 8 DC inputs for potentiometers
• 8 current measurement AC inputs (optional)
• 8 temperature sensor inputs
• 100Mbit LAN with loop through
• Direct Drive capability for single ended XLR outputs, or balanced drive with a suitable output driver card

Please also see AN812: Common Features MK2 as well as the Application Notes on our website www.alldsp.com for additional information. To see all application notes and detailed technical information, please request a login by sending an email to [email protected]. Some of the listed features are optional. Please contact us for detailed information.

Parameter	Test Condition	Min	Typ	Max	Unit
Analog Inputs (electronically balanced)		4
Dynamic Range	< 1% THD, A wtd	130	135		dB(A)
Max. Input Level	< 1% THD	23			dBu
Input Impedance (balanced)		21			kΩ
Input Impedance (single ended)		10.5			kΩ
Delay		2000			ms
Digital Inputs			2	6
Analog Outputs		8
Dynamic Range	Max. level limited by DSP (A wtd)	116	120		dB(A)
Maximum Output Level	Limited by DSP	18			dBu
Output Level Selection		+6, +12, +18			dBu
Noise Floor	Default setting, Channel muted		-102	-98	dBu(A)
Source Impedance		157/235/470			Ω
Delay		50			ms
Digital Outputs				4
Input-to-output latency	FIR disabled, unity gain	528			µs
Gain (without amplifier, DSP only)		0 +/- 0.5			dB
Dynamic Range (unity gain, DSP only)	< 1% THD, A wtd	116	120		dB(A)
THD	0 dBu, 1kHz, unity gain, DSP only, 2 channels		0.0007	0.002	%
Frequency Response (DSP only)	0 dBu, unity gain, DSP only, +/- 0.5 dB	20…20k			Hz
Frequency Response (DSP only)	0 dBu, unity gain, DSP only, +0.5 / -3 dB	10…40k			Hz
DSP		64 bit multimode ALLDSP AM685
Number of processors		5
Sample rate		96			kHz
FIR		8x800			taps
Presets		250
PEQ (per channel)		10			bands
Grouping EQ (each input)		5			bands
Crossover (each input, LPF and HPF)				24	dB/Oct
Crossover (each output, LPF and HPF)				48	dB/Oct
Compressors (per channel)		4			bands
Limiter (switchable true RMS / Zero Attack, each in and out)		1			bands
Analog Supply Voltage VCC / VSS		+/- 12	+/- 15	+/- 16	V
Optional additional supply voltage (VDD)		6			V
Current consumption VCC (using optional VDD)				150	mA
Current consumption VCC (without optional VDD)				500	mA
Current consumption VSS				150	mA
Current consumption VDD				600	mA
Temperature		0		50	ºC
Humidity				80	%RH

All values, specifications, features and other statements are for information purposes only and do not constitute a guarantee. Specifications are measured in real-life environments. Due to manufacturing differences, deviations can occur. All information may be changed by ALLDSP without notice.

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