# HB 46 II 4A-A

> HB 46 II 4A-A (iPhone/iPad app by APEX Italy.)

- Source: https://appshunter.io/ios/app/hb-46-ii-4a-a/id6757208496 (this page in markdown: same URL + `.md`)
- Developer: [APEX Italy](https://appshunter.io/developer/1446565085)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 3 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-01-05
- Data updated: 2026-05-20
- User reviews in markdown: https://appshunter.io/ios/app/hb-46-ii-4a-a/id6757208496/reviews.md

## What is HB 46 II 4A?

The Harmony DSP App allows you to setup and tune your system with your smart phone or tablet. 
In the main screen you will find the Input Source menu where you can choose BT, HI-LEV, OPTICAL and PLAYER. Here you also find 6 Presets (saved into your device) to choose from, you access the Music Player, you have the Main and Subwoofer Volume, and the Advanced menu with Channels, EQ, System and Mixing. 
From the Channel Page, you can assign the function of each speaker, check the Phase for polarity, adjust the individual Channel Gains and set Delay in milliseconds or centimeters, for a rock solid and accurate front stage. 
The EQ page holds the heart and the brains of the App. You can use either the Graphic or the Paragraphic EQ’s. You can customize the crossovers to fit the needs of your individual system. You have adjustments for Gain, frequency, and Q factor. You can work on channels individually or you can link them. 
With the MIX function you can manually determine which inputs (USB-L/R, Digital-L/R, BT-L/R) will be used for each output (processing channel) and how much of each input the output will receive. 
The new Music Player function lets you have full control of all your favorite songs, inside the App. Be sure to connect a proper USB device containing audio files in the supported format. From the App it is possible to access the folders and the contained audio files.


## Version history (last 5 releases)

### 1.0.5 — 2026-03-03

修复通道联调状态下重连设备后联调标识不刷新的问题

### 1.0.4 — 2026-02-02

修正保存/调用音效组后高亮当前操作的音效组

### 1.0.3 — 2026-01-27

修复连接完成后多个页面需要输入密码的bug
修复连接DSP设备后不读通道类型的问题

### 1.0.2 — 2026-01-16

增加可选择通道按钮

### 1.0.1 — 2026-01-12

修正蓝牙匹配名称

## More apps by APEX Italy

- [ZAPCO DSP-Z8IVII](https://appshunter.io/ios/app/zapco-dsp-z8ivii/id1446881973)
- [ZAPCO ST-4X/6X/68X DSP](https://appshunter.io/ios/app/zapco-st-4x6x68x-dsp/id1586152719)
- [HARMONY DSP](https://appshunter.io/ios/app/harmony-dsp/id1638244924)
- [HB 410 ADSP](https://appshunter.io/ios/app/hb-410-adsp/id6450350919)
- [HB II DSP](https://appshunter.io/ios/app/hb-ii-dsp/id6753644572)

All apps by APEX Italy: https://appshunter.io/developer/1446565085

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-20.*