# DSP 1.8 vs A540DSP

The clearest difference is device support: A540DSP at 3 against DSP 1.8's 1. DSP 1.8's advantage is iOS requirement (12.0 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DSP 1.8 ships an update every 39 months, A540DSP every 47 months. Both last shipped on October 3, 2026.

## The numbers

| Metric | DSP 1.8 | A540DSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dsp-18/id1289173178/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 39 months** | Every 47 months |
| Monetization | Free | Free |
| Size | 47 MB | 26 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rainbow Audio GmbH](https://appshunter.io/developer/1284821198) | [杏生 卢](https://appshunter.io/developer/1094592555) |

## What reviewers say

### DSP 1.8

[App page](https://appshunter.io/ios/app/dsp-18/id1289173178)

Configure and control a specific audio DSP device wirelessly. Stream audio directly over WiFi. Requires a dedicated hardware module for operation.

**Highlights:** Wireless configuration, WiFi audio streaming, DSP device control, Requires WiFi module

**Features:** macOS Compatibility

**In-app purchases:** none


### A540DSP

[App page](https://appshunter.io/ios/app/a540dsp/id1423992250)

Control your car amplifier's audio settings, including EQ, bass, and time alignment, directly from your phone. Save and load custom sound profiles for a personalized listening experience.

**Highlights:** EQ control, Bass adjustment, Time alignment, Phase and mute settings, Filter control, Save sound settings to phone, Save sound settings to amplifier, Load sound settings from phone

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DSP 1.8 free?

DSP 1.8 is free to download, with no in-app purchases.

### Is A540DSP free?

A540DSP is free to download, with no in-app purchases.

### Do DSP 1.8 or A540DSP have ads?

Neither DSP 1.8 nor A540DSP shows ads.

### Which is updated more often, DSP 1.8 or A540DSP?

DSP 1.8 ships an update every 39 months, and A540DSP every 47 months. Most recently, DSP 1.8 was updated on October 3, 2026 and A540DSP on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*