ESX QS-TWO-BT-ISO

The ESX QS-TWO-BT-ISO combines a powerful 2-channel digital amplifier with a built-in Bluetooth receiver and a pre-assembled ISO plug-and-play cable set. Thanks to its extremely compact dimensions, this power amplifier is particularly well-suited for installations with limited space and can be mounted directly behind the car stereo in many vehicles.

The included 60-cm ISO cable set makes integration particularly easy for vehicles and car stereos with compatible ISO connectors. This allows the power amplifier to be connected between the vehicle’s wiring and the stereo without having to run a completely new set of speaker wires through the vehicle.

Despite its extremely compact design, the QS-TWO-BT-ISO delivers up to 2 x 95 watts RMS into 2 ohms. Alternatively, the amplifier can be operated in bridge mode, delivering up to 190 watts RMS into 4 ohms.

The built-in Bluetooth 5.0 receiver also enables direct wireless music playback from a smartphone or other compatible audio source. The Bluetooth volume can be adjusted to the signal source being used in three steps—-3 dB, 0 dB, or +3 dB—via an internal jumper.

In addition to the Bluetooth input, both RCA and high-level inputs are available. The high-level inputs are equipped with the ESX EPS® Error Protection System, which can help prevent error messages from the speaker diagnostics systems in modern vehicles.

An automatic power-on function via DC or signal detection simplifies integration with factory-installed radios that lack a remote output. The stereo RCA output can also be used to supply an audio signal to, for example, an additional amplifier or an active subwoofer.

To accommodate different speaker configurations, switchable high-pass or low-pass filtering at 80 Hz is available. The wide frequency response up to 60 kHz and the very low distortion ensure clean and detailed sound reproduction.

Features

• 2-Channel Class-D Nano Digital Amplifier

• Built-in Bluetooth 5.0 receiver

• ISO Plug-and-Play Version

• 60 cm ISO connection cable set

• Very compact design

• Solid cast aluminum heat sink

• High Efficiency

• High-level inputs

• ESX EPS® Error Protection System

• RCA low-level inputs

• Stereo RCA Signal Output

• Suitable for driving an additional amplifier or active subwoofer

• Automatic Power-On Function

• Auto Turn-On via VOX or DC

• Start/Stop-capable

• Switchable high-pass filter

• Switchable low-pass filter

• Bluetooth Level Adjustment via Jumpers

• Suitable for speakers with an impedance of 2 to 8 ohms

• Suitable for HD audio playback
  
  

Technical Specifications

• Amplifier Type: 2-Channel Class-D Digital Amplifier

• Channels: 2
  
  

RMS output power at 13.8 V:

• 2 x 52 watts RMS at 4 ohms

• 2 x 95 watts RMS at 2 ohms

• 1 x 190 watts RMS bridged at 4 ohms
  
  

Additional amplifier specifications:

• Permissible speaker impedance: 2–8 ohms

• Frequency range: 10 Hz – 60,000 Hz

• Total Harmonic Distortion + Noise (THD+N) @ 5 W: 0.005%

• Damping factor: 140

• Signal-to-noise ratio: 100 dB

• Input sensitivity: 220 mV – 5.4 V

• Efficiency: up to 90%
  
  

Crossover:

• High-pass filter (HPF): 80 Hz

• Low-pass filter (LPF): 80 Hz

• Filter slope: 12 dB/octave

• Filter Mode: FULL / HP / LP
  
  

Inputs:

• 2-Channel RCA Low-Level Input

• 2-Channel High-Level Input

• High-Level Input with EPS® Error Protection System

• Bluetooth Stereo Input
  
  

Outputs:

• 2 speaker outputs

• Stereo RCA Low-Level Output

• RCA output, for example, for active subwoofers or additional amplifiers
  
  

Bluetooth:

• Bluetooth version: 5.0

• Built-in stereo Bluetooth receiver

• Bluetooth frequency range: 2,400 – 2,484 MHz

• Adjustable Bluetooth gain: -3 / 0 / +3 dB
  
  

Automatic Power-On:

• VOX Signal Detection

• DC Detection

• Automatic Power-On Function for OEM/Factory-Installed Radios
  
  

Power supply:

• Operating voltage: 7.1 – 15.9 V

• External fuse: 20 A

• Start/Stop-capable
  
  

Dimensions:

• Width: 90 mm

• Height: 35 mm

• Length/Depth: 70 mm

• Overall dimensions: 90 x 35 x 70 mm