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Zoom AMS-22


2-input; 2 output (one microphone preamp) 24-bit/96KHz USB audio interface with direct monitoring

The new AMS series low-cost audio interfaces from Zoom offer an exceptional value, with very flat frequency response that we've tested to exceed factory specifications and low-noise, high-gain, mic preamps that will result in excellent sensitivity when used with our hydrophones. Each offers full 48V phantom power that is compatible with any of our hydrophones or amplifiers with XLR output.

They are very compact and all can be powered from the USB bus or an external USB battery pack (note that phones and tablets may not provide power to external devices). Additionally, the AMS-24 and AMS-44 can be powered from AA batteries.

Compact and simple headphone amplifier:

With the "Direct Monitor" switch set to "on", these audio interfaces can be used as a simple mic pre/headphone amp for listening to underwater sound without the use of a computer. This "Direct Monitor" switch can also be used as a mute switch for applications like leak finding, where the hydrophone is being moved around a lot. The headphone or 1/4" outputs can also be connected to a line or "AUX" input of a marine stereo or powered speaker.

Audio interface to computer or phone:

When connected by USB to your computer, these will allow you to do real-time spectral analysis or recording using any of hundreds of available applications--many being very low-cost or free. Aquarian does not attempt to evaluate software options and does not sell or support any specific tools. These are also class-compliant audio devices that should work with phones, tablets and development boards, such as Raspberry Pi. Check your cable and power requirements. Performance may be limited to lower sampling rates when used without the Zoom driver.

Included with the AMS-22:

  • AMS-22 USB Audio Interface
  • USB Cable (Type A to Type C)
  • Quick Tour

AMS Series Comparison Chart






 Also See: AMS-24, AMS-44

Input and Output Channels

Number of input channels Mono (MIC/GUITAR) 1
  Stereo (LINE IN) 1
Number of output channels Stereo (TRS) 1
  Stereo (PHONES) 1


MIC/GUITAR Type XLR/TRS combo jack
    (XLR: 2 HOT, TRS: TIP HOT)
  Input Gain +8 - +54 dB (MIC) / +8 - +54 dB (GUITAR)
  Input impedance XLR: 2 kΩ (MIC)
    TS: 1 MΩ (GUITAR)
  Maximum input level XLR: +0.6 dBu (MIC)
    TS: +11 dBu (GUITAR)
  Phantom power +48 V
OUTPUT (standard phone jacks) Type TRS phone jacks (impedance balanced)
  Maximum output level −2 dBu (at 0 dBFS)
  Output impedance 100 Ω
OUTPUT (headphone jack) Type 3.5mm stereo mini jack
    20 mW + 20 mW (32 Ω load)
  Output impedance 10 Ω
USB   USB Type-C (audio interface function)
    • Use a USB cable that supports data transfer. USB bus power is supported.
DC 5V   USB Type-C (for power supply)
LINE IN Type 3.5mm stereo mini jack
  Input impedance 20 kΩ
  Maximum input level +1.5 dBu

Frequency Response

  44.1 kHz: +0/−2 dB (20 Hz – 20 kHz)
  96 kHz: +0/−3 dB (20 Hz – 40 kHz)

Equivalent Input Noise

  –120 dBu or less (IHF-A) at +54dB/150Ω input

Audio Interface

Input and output channels   Recording: 2 channels
    Playback: 2 channels
Sampling frequencies   96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz
Bit Depth   24-bit
Interface   USB 2.0
Class   USB Audio Class 2.0


  AC adapter (ZOOM AD-17): DC 5 V/1A
  • USB bus power is supported.

Rated Current

  USB bus power / DC 5 V power supply: 170 mA

Power Consumption

  1.8 W maximum


  68.0 mm (W) × 57.7 mm (D) × 46.0 mm (H)

Weight (unit only)

  85 g

AMS-Series System Requirements

Windows OS: Windows® 10 / 11 (64bit)
  CPU: Intel® Core i3 or faster, or AMD Ryzen 3 or faster with Zen architecture*
  USB: USB 3.0 / 2.0**
  * Operation is not guaranteed with CPUs from Intel® Atom, Celeron or Pentium series or CPUs from AMD Athlon.
  ** Only USB host controllers with Intel/AMD Chipsets are supported. Operation is not guaranteed when used with USB hubs or expansion cards.
Mac OS: Mac® OS X 10.14.6 ~ macOS 12
  CPU: Intel® Core i3 or faster, or Apple M1
  USB: USB 3.0 / 2.0*
  * Operation is not guaranteed when used with USB hubs or expansion cards.
iPhone / iPad OS: iOS/iPadOS 13.7 ~ 15
  * Apple Lightning-to-USB Camera Adapter required.
Android OS: Android OS 9 ~ 11
  * USB cables and adapters that match the connectors are necessary.
  * Please refer to the compatible android device list.