Economic Wall-Mounted IP Speaker with 100V Backup
2x20W Digital Amplifier • 3.4" LCD Display • USB/MP3 Playback • 100V Backup Input • Master/Standby Switch
T-7705S
Cost-effective wall-mount IP speaker with analog backup. The T-7705S is an economic wall-mounted IP speaker featuring a 2x20W digital amplifier, 3.4" LCD display, and USB/MP3 playback. A key feature is the 100V backup input that automatically switches to analog paging in case of network failure – ideal for life safety and emergency applications.
| Model Number | T-7705S |
| Product Type | Economic Wall-Mounted IP Speaker |
| Display | 3.4-inch LCD (Character/Graphic) |
| Amplifier Output | 2 x 20W (stereo) @ 4-8Ω |
| Network | 10/100Mbps Ethernet (RJ45) |
| Audio Protocols | TCP/IP, UDP, HTTP, RTP, RTSP |
| Audio Codecs | MP3, WAV, PCM |
| Media Playback | USB 2.0 (MP3/WAV) |
| Audio Inputs | 1 x MIC (3.5mm), 1 x AUX (RCA) |
| Backup Input | 100V constant voltage (for analog backup) |
| Redundancy | Master/Standby switch, <0.3s failover |
| Frequency Response | 80Hz – 18kHz (±3dB) |
| THD+N | < 0.1% (1kHz, 10W) |
| S/N Ratio | > 85dB |
| Power Supply | PoE (IEEE 802.3af) or DC 24V |
| Power Consumption | ≤ 12W (without speakers) |
| Mounting | Wall mount (included), 86x86mm back box compatible |
| Dimensions (WxHxD) | 180 x 120 x 45 mm |
| Weight | 1.1 kg |
| Operating Temperature | 0°C – 40°C |
| Humidity | 10% – 90% non-condensing |
| Color | White / Black (optional) |
| Certifications | CE, FCC, RoHS |
The T-7705S features a 100V constant voltage backup input. In the event of network failure, the unit automatically switches to this analog input, ensuring that emergency announcements from a traditional 100V paging system are still heard. The Master/Standby switch enables <0.3s failover for mission-critical applications.
The T-7705S is an economic wall-mounted IP speaker designed for cost-sensitive installations where reliability and backup capabilities are still essential. It combines a 2x20W digital amplifier, 3.4" LCD display, and USB media playback in a compact wall-mount enclosure.
100V Analog Backup – Key Differentiator: Unlike standard IP speakers, the T-7705S includes a 100V constant voltage input that serves as an analog backup. If the network fails or the server goes offline, the speaker automatically switches to the 100V input, receiving announcements from a traditional analog paging system. This makes it ideal for:
Cost-Effective Design: The T-7705S offers essential features at an attractive price point: stereo 20W amplification drives passive speakers directly, USB port for local MP3 playback, and 3.4" LCD for status and basic control.
Master/Standby Redundancy: The built-in master/standby switch enables fast failover (<0.3s) when paired with a second unit, ensuring continuous operation even if the primary amplifier fails.
Automatic switch to analog 100V paging during network failure. Ensures life-safety announcements are never missed.
<0.3s automatic switchover to backup unit. Hot-standby mode keeps audio synchronized.
Front-panel USB port for local MP3 playback. Ideal for background music or backup announcements.
Shows volume, source, IP address, and backup status. Simple, reliable interface.
| Condition | Audio Source | Indicator |
|---|---|---|
| Normal operation | Network streaming (IP) | Green LED |
| Network failure / no signal | Automatic switch to 100V backup input | Amber LED |
| Manual override | Front panel source select | As selected |
Automatic failover
Network → 100V backup
Two T-7705S units can be configured as a master/standby pair. If the master fails (loss of audio, power, or network), the standby automatically takes over in <0.3 seconds. Connect the failover cable between units and set one to MASTER, the other to STANDBY. Ideal for critical zones where downtime is unacceptable.
| Model | Display | Amp | Backup | Wireless |
|---|---|---|---|---|
| T-7705S | 3.4" LCD | 2x20W | 100V | No |
| T-7705B | 3.4" LCD | 2x20W | 100V | 2.4G mic |
| T-7705BG | 3.4" LCD | 2x20W | 100V | 2.4G mic + Bluetooth |
| T-7705BM | 3.4" LCD | 2x30W | 100V | 2.4G mic + MP3 |
| T-7705A | 4.3" TFT | 2x30W | No | Bluetooth, 2.4G opt |
| Feature | T-7705S (Economic) | T-7705A (Advanced) |
|---|---|---|
| Display | 3.4" LCD | 4.3" TFT touch |
| Amplifier | 2x20W | 2x30W |
| 100V Backup | Yes | No |
| Master/Standby | Yes (<0.3s) | No |
| Bluetooth | No (T-7705BG has) | Yes |
| Wireless Mic | Optional on B/BG/BM | Optional 2.4G |
| Best For | Life safety, backup required | Interactive classrooms |
The 100V backup input is designed for analog 100V line-level signals from a traditional paging amplifier. Do not connect speaker-level outputs directly. The T-7705S's internal amplifier drives the speakers; the 100V input is just a signal source. Ensure backup amplifier volume is set appropriately.
For redundant operation, two T-7705S units can be placed in the same zone. Connect the supplied RJ11 cable between units. Set one to MASTER, the other to STANDBY. Both receive the same network audio. If master fails, standby takes over in <0.3s – no audio dropout.
Primary: Server → PoE Switch → T-7705S (network audio)
Backup: Analog 100V paging amp → T-7705S 100V input
During normal operation, audio is from network. If network fails, unit automatically switches to 100V backup, ensuring continuous emergency paging capability.