Shantie
PK628

PK628 Switcher

The PK628 Switcher serves as a central control unit for ​audio equipment manufacturers and sales agents, producers and distributors of audio peripheral devices, various music studios, and venues requiring A/B comparison listening tests. It significantly reduces the workload for audio testing personnel. Through remote-controlled indication and switching, it transforms cumbersome audio comparison tasks into a轻松愉快 (pleasant and enjoyable) experience.
PK628
Product description
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Overview & Applications​

The PK628 Switcher serves as a central control unit for ​audio equipment manufacturers and sales agents, producers and distributors of audio peripheral devices, various music studios, and venues requiring A/B comparison listening tests. It significantly reduces the workload for audio testing personnel. Through remote-controlled indication and switching, it transforms cumbersome audio comparison tasks into a轻松愉快 (pleasant and enjoyable) experience.

​Key Features & Technical Specifications​

  • ​Input/Output Configuration:​​ Features a ​6-input, 6-output stereo dual-channel​ design, allowing free switching between six amplifiers and six speaker pairs. This meets the requirements of large listening rooms.

  • ​Advanced Relay System:​​ Innovatively incorporates ​52 high-power relays. Among these, 48 relays are responsible for the synchronous switching of the positive and negative output poles, ensuring complete isolation between each amplifier and its load. This prevents noise issues caused by ground loops and avoids "digital-analog conflicts" that could lead to误触发保护 (false protection triggering).

  • ​Integrated Music Source:​​ Includes a high-quality ​Bluetooth 5.0/MP3 player​ as a built-in music signal source, facilitating easy connection to smartphone music libraries and mobile U盘 (U-disk) music libraries.

  • ​Panel Metering:​​ The panel features a ​red meter for displaying mains voltage​ and a ​green meter for displaying the maximum output voltage RMS​ during sine wave testing. An innovative green meter driver circuit ensures accurate reading, even for phase-inverted dual-channel digital amplifiers or bridged analog amplifiers, displaying the doubled output voltage value in real-time.

  • ​Intelligent Switching Technology:​​ Utilizes a unique ​microcontroller algorithm​ combined with a ​lossless attenuator​ and a ​high-compression ratio limiter/compressor. This ensures that all power relay contacts meet ​cold switching requirements (Zero Voltage Switching On/Off technology)​, achieving smooth and seamless channel switching. It彻底消除 (completely eliminates) switching pops caused by hot switching and the impact of contact arcing on sound quality, enhancing the machine's stability and durability.

  • ​Operational Modes:​​ Innovatively supports自由转换 (free switching) between a ​1x6 single-unit switching mode​ and a ​2x3 dual-unit switching mode. The latter meets specific needs for simultaneously switching two amplifiers and two speaker pairs. Coupled with highly reliable remote control functionality, it makes switching and listening tests a轻松惬意 (relaxed and enjoyable) task.

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​Guangzhou Shantie Audio Equipment Co., Ltd.​​    
​Foshan Shantie Audio Equipment Co., Ltd.​
Guangzhou Address: Room 308, Phase II, Keji Mansion, Shiqiao, Panyu District, Guangzhou City
FoShan Address:5th Floor, Building 12, Kangbao Huateng, Keji 5th Road, Xingtan Town, Shunde District, Foshan City     

​Customer service hotline 0757-2636 3683

Comapny Website www.3t-audio.com