AX vs DSP sound master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AX
Enhance your car's audio system with this digital signal processor. It offers an all-in-one solution for various audio setups, allowing for improved sound quality and subwoofer integration while preserving factory features. Control settings easily via a smartphone app.
- Digital Signal Processor
- Subwoofer integration
- Preserves OE features
- Bluetooth smartphone control
- Vehicle-specific T-Harnesses (sold separately)
- All-in-one solution
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Axxess, a leader in vehicle interfacing, has once again set the industry standard by developing a cost effective option for customers desiring to improve vehicle sound quality with a Digital Signal Processor. The AX-DSP-XL presents an all-in-one solution for a variety of car audio system setups, from fixed level output (digital) to analog OE systems, and even adding a subwoofer to an OE system. Our before the amp solution is designed to allow the installers the option to remove the factory amplifier or to add a subwoofer all while maintaining the OE features and controls of the radio. Whether you have a Digital or Analog factory amplifier system, the AX-DSP-XL has you covered. Unlike other digital signal processors on the market, the AX-DSP-XL includes a built-in Axxess Interface. More reasons installers will love the new Axxess DSP is for its quick and simple installation behind the factory radio, due to its small footprint. Features and settings are easily controlled via Bluetooth from our free Smartphone application. To further cut down on install time, Axxess has engineered vehicle specific T-Harnesses (sold separately), that make installation even faster and easier, with no need to cut any wires. The Axxess Digital Signal Processor provides a smart and cost efficient way to provide improved sound quality that customers want when upgrading their vehicle sound systems.
DSP sound master
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This application use bluetooth communication to control Car DSP player and tune sound setting.
Screenshots
Verdict
The clearest difference is update cadence: AX at every 2 months against DSP sound master's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AX ships an update every 2 months, DSP sound master every 9 months. The most recent releases landed on September 7, 2026 and April 22, 2026 respectively.
| Parameter | AX | DSP sound master |
|---|---|---|
| Price | Free | Free |
| Rating | 2.2 (5 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Metra Electronics Corp. | 师贤 陈 |
In-app purchases
AX
No in-app purchases
DSP sound master
No in-app purchases








