Indoor/Outdoor/Wall IP SIP Speaker

The AD638 IP-SIP loudspeaker is part of a series of TEMA loudspeakers to be connected in a standard LAN for public address Paging (PA) audio announcements, prerecorded messages and music, in offices, companies, hotels, medical clinics, hospitals, public places, schools, etc.
AD638 is particularly suitable when sound power and high sound quality is required at the same time with a pleasant and attractive design. The system, unlike the other models in the series, incorporates 2 speakers for low-medium and high frequencies sounds. The AD638 also incorporates a quality microphone for bidirectional communications and allows all the extended services of the AD63x SipComStage series.
The systems are equipped with PoE power supply to take direct power on the UTP cable and an input from an external 230Vac/12-24Vdc power supply to double the maximum power output.

 Applications, Target

  • Companies, Offices, Conference Rooms
  • Warehouses, Supermarkets, Parkings
  • Hotel, Fitness Centers, Restaurants
  • Hospitals, Clinics, Schools
  • Outdoor Public Areas
  • Railway Stations, Airports, Ports

 Packing List

  • 1 IP VoIP SIP AD638W or B (white-black) Speaker
  • 1 Paper manual
  • 1 CD-ROM with complete documentation


Power Amplifier Technology

Two amplifiers in class “D” with high efficiency and low power consumption generates 40W (2x20W) and is self-protected against overloads and short circuits at the outputs.

Pre-recorded messages

In the internal SD card are recorded sounds and messages for automatic or command sending onto speaker, also automatically at pre-set times daily and weekly.

iOS and Android APP

Free download APP are available for smartphones with operating systems iOS and Android.
With these applications it is possible to operate with the IP speakers and launch announcements even from smartphones.

Integration with VoIP SIP phone systems

AD638 can be perfectly integrated with VoIP telephone systems (IP-PBX) with SIP protocol and can be registered as a regular VoIP phone or P2P (Peer to Peer) without a PBX.

Innovative features and performances

Ideal for creating Paging PA (Public Address) audio systems of any size using the existing LAN network infrastructure! Perfectly integrated with the PBX and the security system.

Technical features

LAN, protocols TCP/IP Network 10/100BaseTx, SIP 2.0
Grade of protection IP65
Power Supply PoE, Injector PoE or ext power supply
PoE IEEE802.3af class 0
External Power Supply (Opt.) 230Vac/12-24Vdc-1-2A
Password access, activity logs
Inputs from external alarm commands 1
Inputs for diversified call buttons 1
Contact rating of the 2 internal relays max 30Vdc – 1,5A
IMX25 400MHz processor
256MB Ram, Micro-SD Flash 2GB
Housing material Abs
Operating temperature from -20° to +55°C
Storage temperature from -20° to +65°C
up to 100%
wall mount, including Horiz./Vert. adj. bracket
190 x 195 x 290mm
3,3Kg including bracket
Audio Amplifier 40W (Ext. Pwr Supply) Class “D” (10W PoE)
Acoustic unit impedance 8 Ohm
Audio Bandwidth 50 – 20.000Hz
Acoustic pressure (SPL) 93 dB A (1KHz at 1 meter)
Internal Microphone omnidirectional electret 30Hz-18KHz
Multicast Audio Streaming G711μ, G711a, G722, L16 8…44 kHz
Audio Communication Unidirectional and Bidirectional
Additional speakers 1 passive speaker 8 Ohm 20W
Messages/Sounds n. 6 pre-recorded into the internal SD
Connection SIP Server (IPPBX) or P2P (Peer To Peer)
Smartphone APP iOS, Android
Acoustic signaling call tones, ads Ding-dong
Visual signaling Active call led
Programming user-friendly web interface and passwords
Origin entirely developed and manufactured in Italy
Warranty 2 years, possibility of extension (option)
Compatibility CE, ROHS



PoE Injector 230Vac/ 48Vdc-0,5A
Switching DIN Power Supply 220Vca/24Vcc-1,5A
DIN audio line transformer 100V-30W
Passive Speaker 8Ω - 40W white
Passive Speaker 8Ω - 40W black
Microphone base for PC with ADAM software
Light signals, Flash


Advanced software for complete management of all terminals and multi-zone microphone consoles
Smartphone APP
iOS, Android, Windows


Data File Dimensione
01/2019 Datasheet 1.49 MB
05/2019 Brochure 3.88 MB
01/2019 Application notes 10.4 MB
03/2018 Manual 4.70 MB
09/2019 Light indicators 458 KB
03/2018 AD600 Addendum 292 KB