【4chDSPAMP HB 46 ll 4A｜6ch DSP Amplifier with Music Player】

You may want to fine-tune the sound of your OEM audio a little more, but you’d like to avoid adding multiple amplifiers and DSP units that make the car interior more complicated. That’s where 4chDSPAMP HB 46 ll 4A comes in.

The unit combines a music player, a 6-channel DSP, and a 4-channel power amplifier in one compact body. Despite its small size, it lets you create a sound tailored to the car’s acoustic characteristics and speaker placement using a 31-band EQ, time alignment, and more.

In the driver’s seat, you may hear only nearby speakers more prominently, or the vocals may not be centered on the dashboard. With the HB 46 ll 4A, you can adjust each speaker’s volume, frequency band, and time differences to shape the vocal position and the instrument soundstage.

Because it also includes a 4ch Class AB power amplifier, you can drive front speakers and others without adding a separate amplifier. It supports not only RCA input but also high-level input, making it easier to consider an upgrade while keeping the OEM head unit.

In addition, it supports USB-C connection and Bluetooth 5.1 streaming. You can play audio stored on a smartphone or USB memory from the built-in player. It’s also convenient because it supports commonly used formats such as MP3, WMA, FLAC, AAC, M4A, and WAV.

However, a DSP amplifier doesn’t produce a finished sound just by installing the main unit. The final result varies depending on the connection method with the OEM system for your vehicle, speaker configuration, mounting location, and settings such as gain and crossover. If I were setting it up, I would first check the vehicle’s system and the music you usually listen to, then configure it so you can make full use of the required functions.

This DSP amplifier is for you if you want to expand your adjustment options while making use of your OEM audio, if you want to introduce a DSP and amplifier in a simple setup, or if you want to enjoy audio from a smartphone or USB memory in the car. Since the connection content changes depending on the vehicle model and your current system, let’s decide the direction together while looking at the actual vehicle.

Main Specifications / Specs

【Basic Information】
Product name: 4chDSPAMP HB 46 ll 4A
Type: 6ch DSP and 4ch power amplifier with built-in music player
DSP: 32-bit audio signal processor AK7735EQ
Operating sample rate: 48kHz / 24bit

【Player Functions】
Supported file formats: MP2/3/4, WMA, APE, FLAC, AAC, M4A, WAV, AIF, AIFC
Digital input: OTG (USB-C)
Bluetooth input: Bluetooth 5.1 streaming

【Amplifier Section】
Output power: 23W×4ch RMS / 70W×4ch MAX
Output conditions: 4Ω stereo
Amplifier type: 4ch Class AB power amplifier
Damping factor: 100 or higher
Frequency response: 10–40kHz (+0/-1dB)
Harmonic distortion: 0.04%
S/N ratio: 100dB or higher

【Input / Output】
RCA external input: 2ch
RCA input sensitivity: 1V to 6V
RCA input impedance: 20kΩ
High-level input: 4ch speaker input
High-level input sensitivity: 4V to 12V
High-level input impedance: 22Ω
RCA output: 6ch LINE OUT
RCA output voltage: 3V
Remote terminals: 1 remote input, 1 remote output

【DSP Adjustment Functions】
EQ: 31-band EQ
Output level: 0dB to -60dB
Level adjustment step for each section: 1dB / step
Time alignment step: 0.021ms / step

【Converters】
A/D converter: 32-bit Asahi Kasei AK7735EQ
D/A converter: 32-bit Asahi Kasei AK7735EQ

【Power & Other】
Operating power voltage: 10.0V to 16.0V
Idle current: 0.4A or less
Remote output current: 500mA (max)
Fuse: ATO 15A×1 (between connector cable lines)
Auto power-on: supported (when using high-level input)
How to determine compatible H/U: ON/OFF switch (on the side panel)
Dimensions: 160(W) × 45.5(H) × 126(D) mm
Weight: 0.8kg
Included accessories: USB cable 1.8m, 20-pin power speaker connection cable