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  • IP-A1RM_Angle.jpg

IP Remote Microphone


The IP-A1RM is an IP remote microphone which is designed to make audio broadcasts to IP-A1 series receiving devices via network. It achieves clear microphone announcements without distortion thanks to its built-in compressor effect. It allows both individual and group broadcast so that single or multiple IP-A1 series receiving device(s) can receive the audio as flexible PA operation. Key button operation controls a variety of functions such as internal audio file playback, HTTP command set transmission and physical control outputs to control external devices.

  • Angle adjustable gooseneck microphone with compressor effect
  • 10 function-assignable keys to initiate broadcasts or controls
  • GUI calendar scheduler function (up to 2,000 settings)
  • System mute function to mute all broadcasts made by every single IP-A1 series devices within the same network
  • 1 AUX audio input (LINE/MIC selectable, phantom power On/Off)
  • 2 control inputs, 1 control output and 1 mute control input
  • Independent volume control for microphone and AUX input
  • HTTP commands (send/receive)
  • Audio file storage (20 files, total 80MB, WAV/MP3)
  • PoE powered
(*1) 0 dB = 1 V
Power Source
PoE(IEEE802.3af Class 3)
Power Consumption
3.5 W
Audio Transmission Method
SIP broadcasting: Unicast Audio Streaming
Group broadcasting: Multicast Audio Streaming
Audio Codec
Opus, PCMU (G.711u), PCMA (G.711a), G.722
Network I/F
100BASE-TX, Auto MDI/MDI-X, RJ45
Network Protocol
Unidirectional electret condenser microphone (With microphone indicator and microphone volume control)
AUX Input
1 channel, unbalanced, 10 kΩ
LINE/MIC selectable (Rated input: LINE: 0 dB (*1), MIC: -60 dB (*1)
PAD function (-20 dB (*1), AUX volume adjustable, Ø3.5 mm mini jack
Monitor Speaker
Cone-type speaker, Speaker volume adjustable, Rated Output: 1 W
Control Input
2 channel, no-voltage make contact inputs, open voltage: 5V DC, short-circuit current: 2 mA or less, push-in terminal block
Mute Control Input
1 channel, 24 V DC cut signal, control current: 5 mA or less, push-in terminal block
Control Output
1 channel, open collector output, withstand voltage: 30 V DC, control current: 150 mA or less, push-in terminal block
Function key: VOLUME, RIGHT, LEFT
Selection key: 0 - 9
LCD display: 3 (255 x 160 dots) with backlight
Indicator: Status indicator (green/blue/yellow/red), Microphone indicator (blue), LINK/ACT indicator (green)
Manual broadcast/control
Manual broadcasting: Microphone broadcast, Recorded audio broadcasting, AUX input broadcast
Manual control: control output, command set transmission
Control trigger: key operation
Scheduled broadcasting and control by WEB-UI (Max. schedule settings: 2000)
Configurable actions: Internal message broadcast, AUX input broadcast, control output, command set transmission
Execute event triggered by control input
Configurable actions: Internal message broadcast, AUX input broadcast, command set transmission, broadcast disable, system mute
Sound Source Files
Max. 20 files (File storage capacity: 80 MB total)
Supported fie format:
WAV file: 8/16/44.1/48 kHz sampling frequency, 8/16 bit, monaural/stereo
MP3 file: 32/44.1/48 kHz sampling frequency, 64 - 320 kbps, CBR/VBR, monaural/stereo
Repeat playback: Playcount (1 - 10 times) or Duration (5 - 3600 sec)
Interval time: 0 - 99 sec, Delay time: 0 - 99 sec
Recorded audio broadcast
Audio recording and playback broadcast with the built-in microphone
Max. 2 minutes, 1 message
Pre and post chime tones (applied for manual broadcast and internal audio file broadcast)
Preset chime tone x 5, editable tone x 2
Command Set
20 commands can be registered in each of 10 command set
Clock Accuracy
±13 seconds per month
Time Adjustment
Manual time setting, Time adjustment by NTP server
Power Outage Protection Period
24 hours (RTC time retention, at +40 °C (104 °F)
Operating Temperature
0 °C to +40 °C (32 °F to 104 °F)
Operating Humidity
90 %RH or less (no condensation)
ABS resin, black, paint
224 (W) x 47.2 (H) x 136 (D) mm (8.82" x 1.86" x 5.35") (excluding microphone)
630 g (1.39 lb)
Included Accessories
Zip tie x 2
Optional Accessories
Wall mounting bracket: WB-RM500
These specifications apply to the firmware verion 3.1.0 or later. For the latest specifications and firmware, please refer to the TOA DATA Library (

Please download Datasheet to access full specifications.

Optional Accessory

The IP remote microphone shall be able to make audio broadcasts with a built-in gooseneck microphone to IP audio endpoints via network. It shall be equipped with a built-in audio compressor to avoid distortion and achieve clear microphone announcements.
The IP remote microphone shall allow both individual and group broadcast by using SIP and Multicast protocols.
The IP remote microphone shall be equipped with ten selection buttons which are function-assignable to activate a variety of different broadcasts and controls.
Twenty multi-cast ports shall be available for group paging and shall have the facility of storing up to twenty audio files with the code of WAV or MP3 format internally. The device shall have the flexibility of broadcasting these files from a calendar schedule at predetermined times or repeated when necessary triggered from a control input, or from remote API (HTTP). 
The IP remote microphone shall be capable of muting other TOA IP-A1 series devices such as IP-A1AF, IP-A1PA12, IP-A1PC238, IP-A1PC580R or IP-A1PC580S within the same network.
Remote settings shall be achieved by connection to a Windows® based personal computer and by using the PC’s browser, operational settings, functions and system status can be established.
The IP remote microphone shall have an electronically balanced 10k Ω AUX audio input with LINE/MIC selection with switchable ON/OFF 12 V DC phantom power and a corn-type monitor speaker.
The built-in monitor speaker shall be able to be used for recording monitoring and two-way communications.
The independent volume control shall be available for AUX audio input and a built-in microphone.
The IP remote microphone shall have two control inputs and one control output with an additional 24 V DC mute contact.
The IP remote microphone shall offer priority status among the various broadcast modes that will override and interrupt a lower priority broadcast.
Power source shall be supplied from a PoE switching hub.
The IP remote microphone shall be housed in black ABS resin enclosure and its dimension shall be 224 (W) x 47.2 (H) x 136 (D) mm (8.82” x 1.86” x 5.35”) weighing 630 g (1.39 lbs).

Optional extras:
Wall mounting bracket: WB-RM500
manufactured by TOA Corporation

Manufacturer: TOA Corporation
Model: IP-A1RM

  • IP-A1RM_Angle.jpg
  • IP-A1RM_Bottom.jpg
  • IP-A1RM_Rear.jpg
  • IP-A1RM_Side.jpg
  • IP-A1RM_Top.jpg

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