Fostex
Fostex AR-4i Audio Interface
Best portable audio enhancement for mobile video creators.
The Fostex AR-4i is a high-quality stereo audio interface designed to enhance the audio recording capabilities of your iPhone 4, iPhone 4S, and iPod touch (4th generation). It features built-in AD/DA converters, a gain input, headphone output, level metering, a limiter, and a low-cut filter. With three microphone inputs, it supports stereo mic setups for both vertical and horizontal phone orientations. Threaded inserts allow for tripod or handle mounting, and a free Fostex app provides control over EQ, input levels, filters, and mic settings. Powered by two AAA batteries, it offers up to 10 hours of recording time, making it ideal for reporters, live streamers, and home movie creators seeking professional-sounding audio.
$109.00
Owner Satisfaction
3.8
/ 5
Category Rank
1095
/ 1220
#1095 in Audio Cards & Adapters
Price vs Category Average
-90%
Below average
Compatibility
444
/ iPhone , iPhone S, and iPod touch (th generation)
Who it's for
- Mobile content creators needing superior sound for their iOS video projects.
- Filmmakers and musicians requiring professional mic connectivity on their Apple devices.
- Journalists and field recorders seeking a portable, high-quality iOS recording setup.
Who should skip it
- Current iPhone and iPad users seeking a modern, compatible audio interface solution.
- Tech-savvy users expecting seamless plug-and-play integration with contemporary devices.
- Consumers preferring readily available products with current manufacturer support and warranties.
Key Specs
Compatibility
iPhone 4, iPhone 4S, and iPod touch (4th generation)
Host Interface
iPhone, iPod touch
Input Port Type
3.5mm Jack
Audio Port Types
3.5mm Jack
Output Port Type
3.5mm Jack
Number of Microphone Inputs
3
Power Source
2 AAA batteries
Operating System Compatibility
iOS
Features
- High-quality stereo interface with AD/DA converters
- Three microphone inputs for flexible stereo setups
- Gain input, level metering, limiter, and low-cut filter
- App control for EQ, levels, and mic settings
- Threaded inserts for tripod or handle mounting
- Up to 10 hours of record time on AAA batteries
What customers say
Customers generally appreciate the Fostex AR 4i for its straightforward integration with older iOS devices, making mobile audio recording more accessible. Many users highlight its ability to significantly improve audio quality over built in phone microphones, particularly for video projects. The compact design is often praised for its portability, allowing creators to capture better sound on the go. While its specific compatibility with older Apple products is noted, its core function of enhancing mobile audio is a consistent positive.
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$109