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Line-level Audio Plus Monitoring Adapter for iPhone & Smartphones

The attenuator splitter cable allows you to record line level audio from a mixer or soundboard directly to your smartphone while monitoring sound from your favorite 3.5mm headphones.
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  • Mic Line Plus Top view
  • iPhone-Mic-Line Plus long view
  • 3.5mm plugs of the Mic-Line-Plus
  • Mic-Line Plus side view


  • Monitor your line level audio recordings
  • Includes attenuator that allows for line-level to mic-level conversion
  • Works with most phones that have a combined headset and mic jack
  • Allows the use two audio sources at a time, just add a splitter!
  • Crystal clear sound recording, 100% guaranteed

The Mic-Line Plus takes all of the great features of our iPhone-Mic-Line and adds a secondary cable to allow monitoring of your recordings with the use of 3.5mm headphones.

If you are not familiar with our original Mic-Line here is a brief description. Headset Buddy allows you to record from line-level audio source with a 3.5 mm connector such as a mixer or soundboard to an iPhone, smartphone or tablet. The headset connection only have a mono mic input so, although you can connect a stereo signal, it will only record in mono. The Mic-Line Plus also includes a 3.5mm stereo headphone jack which allows you to connect standard headphones so that you can hear exactly what is being recorded by your device*. This adapter is approximately 13 inches long.

*Requires you to use a recording app such as FiRe 2.6, Rode Rec or StudioMini that have monitoring feature.

How it Works: Plug the adapter into the iPhone (or other device) headset jack and then plug your audio source cable into the adapter. The iPhone will recognize that an external audio source is connected and turn its internal mic off allowing you to record using the external source. This adapter works with all audio/video recording apps and other functions just as the internal mic would.
PLEASE NOTE: This adapter is NOT for recording from microphones. Please see our "Dynamic Mic to Smartphone" or "ECM Mic to Smartphone" adapters for these purposes. Also, sound input for smartphone connections is mono but most apps split the sound into left and right channels for playback in both ears. You are able to input stereo sound; however, playback will only be in the left ear.


Free returns, always!

We have a 30-day, no-questions-asked return policy for all of our products as well as a one-year, 100% Satisfaction guarantee; We’ll replace your Headset Buddy for free within the first 12 months.

For further information about Headset Buddy's Warranty and Shipping & Returns policies select the imbedded links

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Incompatible Phones

Older Samsung Galaxy models and the Samsung Galaxy Note 5. We have recently been made aware of an issue with the Note 5 and will be working on a fix

iPhone 4s and below

Select Motorola Droid models

Incompatible Audio Sources:

Microphone - use the microphone version adapters

Outputs that are mic-level


Compatible Phones:

iPhone 5 thru 6s/6s Plus, iPad and iPod

Macbook, Macbook Air and Pro, Mac Mini and Pro

Android smartphones and devices

Windows phones


Compatible Audio Sources:

"Line" audio such as a headphone jack on another device (smartphone, computer, etc.)

Mixers and soundboards with line-level outputs

Most headphones with a 3.5mm connector

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