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LA548 4-input 8-output digital processor audio with AES/AUTO EQ/AUTO FiR

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Categories	AUDIO PROCESSOR
Brand	Sinbosen\| Audio sound system manufacturer
Model	LA548
Voltage	85V–250V
Type	digital processor audio
Feature	AES/AUTO EQ/AUTO FiR
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Detail Information

LA548 utilizes the ADI SHARC ADSP-21489 processor and incorporates standard audio algorithms such as routing, gain, feedback suppression, delay, compression, limiting, muting, equalization, high/low-pass filters, all-pass filters, and phase control. In addition, it offers the following specialized features, each of which can be enabled or disabled independently.

Parameters
Specifications		Parameters
System Sampling Rate		96kHz
Frequency Response		±0.2dB, 10Hz – 25kHz
THD+N		<0.005% @ 10Hz – 25kHz
SNR		<0.005% @ 10Hz – 25kHz
Maximum Input Level		+20dBu / 7.775Vrms
Maximum Output Level		+20dBu / 7.775Vrms
Gain Range		-80dB to +12dB per channel
Input Impedance		>10kΩ, XLR Input
Output Impedance		<60Ω, XLR Output
Test Signal		Independent sine wave / white noise / pink noise selectable per channel
Dynamic Equalizer		Open fully adjustable parameters, 3-band dynamic EQ per channel
Input Equalizer		7-band (Parametric / Low Shelf / High Shelf / All-Pass / Notch, 5 types selectable)
Expander		Threshold / Ratio / Attack / Release time adjustable
High-Pass Filter Types		Linkwitz-Riley / Bessel / Butterworth 12/18/24/30/36/42/48dB/oct
Low-Pass Filter Types		Linkwitz-Riley / Bessel / Butterworth 12/18/24/30/36/42/48dB/oct
Adjustable Delay		Up to 1200ms per channel, 0.01ms resolution
Group Delay		2.8ms @ 96kHz / 1.2ms @ 192kHz
Output Equalizer		15-band (Parametric / Low Shelf / High Shelf / All-Pass / Notch, 5 types selectable)
Input/Output FIR		Low-pass / High-pass / Band-pass direct bypass; Coefficients import & export supported
DRC Dynamic Control		Limiter (Peak or RMS) + Compressor
AFC Acoustic Feedback Cancellation		6-level adjustable control, independent control per channel
Volume / Mute Control		Front panel rotary knob for master volume and mute control
Polarity Control		0°/180° phase flip for each input & output channel
Network Link Control		Direct connection / Router Mode / USB
Level Meter		Dynamic level indication on display screen
Power Supply Range		85V–250V, 50Hz–60Hz

LA548 Processor Features:

A. Switchable 96kHz/192kHz sampling rates for versatile application scenarios.

B. Dynamic equalizer automatically optimizes sound for both high- and low-level signals.

C. FIR filters perfectly correct phase distortion caused by system parameter adjustments; supported on both inputs and outputs.

D. Filters perfectly correct phase distortion caused by system parameter adjustments; supported on both inputs and outputs.

E. FIR filters perfectly correct phase distortion caused by system parameter adjustments; supported on both inputs and outputs.

F. Supports one-click import of EQ data from REW software.

G. Includes Auto EQ/Auto FIR calculation functions for smarter device adjustment.

H. Color LCD screen with real-time dynamic level display; selectable Chinese/English interface.

I. Supports 6-level feedback suppression, one-touch mute, and global master volume control.

J. Adjustable via PC-based control software.

AUTO EQ Settings

AUTO EQ function allows for the import of measurement data from software such as SMAART or REW, automatically calculating the target curve and adjusting the frequency response—delivering a time-saving, effortless, accurate, and efficient solution.

Instructions for use:

1: Import the measured curve.

2. Set or import the desired target curve.

3. Automatically calculate the EQ parameters requiring adjustment.

4. Apply the automatically calculated EQ parameters to the device; the curve in the EQ interface will update synchronously.

AUTO FIR Settings

AUTO FIR function not only corrects frequency response but also processes phase, supporting automatic calculation for three modes: minimum phase, linear phase, and automatic phase.

Instructions for use:

1: Import the measured curve.

2. Set or import the desired target curve.

3. Select Minimum Phase, Linear Phase, or Auto Phase; the parameters requiring adjustment will be calculated automatically.

4. Apply the automatically calculated results to the device; the curve in the FIR interface will update synchronously.

REW Filter Import Function

It supports the import of REW filters, allowing EQ parameters configured and fine-tuned via REW software to be loaded directly into the unit. Users can pre-configure frequency response settings for their speakers and build a personal speaker database, enabling them to simply import the relevant data for immediate use on-site.

Input/Output Channel Settings

FIR filters can be configured for both inputs and outputs, with selectable 256 or 512 taps; the local display allows configuration of FIR filter types (high-pass, low-pass, or band-pass) only, while importing external coefficients requires operation via a PC.

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