ESX SXE250.4

The ESX SIGNUM SXE250.4 is a high-performance 4-channel power amplifier featuring analog Class A/B technology. Featuring high-quality components, solid connection terminals, and meticulous craftsmanship, it offers a compelling combination of high output power and precise sound reproduction.

The SIGNUM SXE series takes its visual cues from the proven HORIZON HXE series and adds distinctive touches with aluminum end panels, acrylic inserts, and a recessed diamond-cut logo. High-quality NE5532 operational amplifiers in the input stage enable detailed signal processing with low distortion.

With up to 4 x 250 watts RMS at 2 ohms, the SXE250.4 is ideal for high-performance speaker systems. In bridge mode, it delivers up to 2 x 500 watts RMS at 4 ohms. The built-in high-pass and low-pass filters, as well as the bandpass function, allow for flexible adaptation to various speaker and subwoofer configurations.

Thanks to the high-level inputs with the integrated Error Protection System (EPS®), the power amplifier can be integrated even into vehicles with factory-installed radios. The automatic power-on function via the high-level inputs makes retrofitting easier.

Technical Specifications

General Characteristics

• Manufacturer: ESX

• Model: SXE250.4

• Series: SIGNUM SXE

• Amplifier Type: 4-Channel Analog Amplifier

• Amplifier Class: Class A/B

• Efficiency: Up to 62%

• Operational Amplifier: NE5532

• Power Supply: MOSFET PWM

• Protection circuit: 3-way

• Heat sink: Aluminum with acrylic inserts

• End panels: Aluminum frame

• Connections: Solid connection terminals
  
  

RMS Output Power

• 4 x 150 watts RMS at 4 ohms

• 4 x 250 watts RMS at 2 ohms

• 2 x 500 watts RMS bridged at 4 ohms
  
  

Maximum Output Power

• 4 x 300 watts max. at 4 ohms

• 4 x 500 watts max. at 2 ohms
  
  

Audio Characteristics

• Frequency response: 5 – 40,000 Hz (-3 dB)

• Total Harmonic Distortion (THD): Less than 0.5% at 1 kHz

• Signal-to-noise ratio: Over 90 dB

• Permissible speaker impedance: 2–8 ohms in normal channel operation

• Input sensitivity: 0.1 – 7 V

• Input impedance: 10 kOhm
  
  

Crossover Networks and Filters

• High-pass filter, channels 1/2: 10–250 Hz

• High-pass filter slope, channels 1/2: 12 dB/octave

• High-pass filter, channels 3/4: 10–250 Hz

• High-pass channel 3/4 slope: 12 dB/octave

• Low-pass filter, channels 3/4: 50–250 Hz

• Low-pass slope, channels 3/4: 12 dB/octave

• Bandpass function: Via combined high-pass and low-pass filters on channels 3/4

• Bass Boost Channels 3/4: Adjustable from 0 to 12 dB
  
  

Connections and Features

• RCA inputs: 4 x RCA for channels 1–4

• High-level inputs: 4 channels via the included cable connector

• Error Protection System (EPS®): Available

• Automatic Power-On Function: Via High-Level Inputs

• Suitable for connection to compatible OEM factory radios

• Bridge Operation: Possible
  
  

Power Supply

• Operating voltage: 12 V DC

• Permissible voltage range: 9–15 V

• Ground connection: Negative terminal to vehicle ground

• Required external fuse rating: 120 A
  
  

Dimensions

• Width: 220 mm

• Height: 53 mm

• Length: 460 mm
  
  

Special Features

• High-quality analog Class A/B amplifier technology

• High-Performance 4-Channel Output Stage

• NE5532 Operational Amplifier for Precise Signal Processing

• Aluminum heat sinks with decorative acrylic glass inserts

• Recessed diamond-cut logo

• Sturdy aluminum end panels

• Heavy-duty power and speaker connections

• Sturdy base plate with mounting brackets

• Integrated crossovers with bandpass functionality

• High-Level Inputs with EPS® Technology

• Automatic power-on via high-level inputs

• MOSFET PWM Power Supply with Triple Protection Circuit