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Ho Chi Minh City’s COVID-19 memorial equipped with gear from Powersoft, Bose and Cisco

Three Powersoft Quattrocanali 4804 DSP amplifiers are at the heart of the audio system installed at the COVID-19 memorial park in Ho Chi Minh City, Vietnam, where Hoang Phu Sound has been tasked with delivering background music that serves both as a tribute to those lost during the pandemic and as an amenity for the surrounding community.

The park is home to “The Tear”, a six-metre reflective stainless-steel sculpture featuring a teardrop form with a heart-shaped void at its centre. Installed in early 2026, the monument honours both the victims of COVID-19 and the frontline workers who served during the crisis. Its stepped circular base incorporates symbolic motifs drawn from Vietnamese culture, and the site is designed to encourage quiet reflection, remembrance and community gathering.

Hoang Phu Sound is a Ho Chi Minh City-based audio systems integrator and Powersoft distributor specialising in the design, supply and commissioning of end-to-end audio solutions across hospitality, commercial and public-sector projects. The company was appointed to deliver the park’s complete audio installation and selected the Quattrocanali 4804 DSP as the amplifier platform for the site.

The project presented a specific set of demands. With the park intended for public use at all hours, the amplifiers were required to operate continuously, 24 hours a day, seven days a week, in an outdoor environment subject to the heat and humidity of Ho Chi Minh City. The scale of the site also called for long speaker cable runs, requiring a high-impedance distribution solution to minimise signal loss. A further consideration was the reliability of the local electrical supply, with the system needing to perform consistently under variable mains conditions.

The Quattrocanali 4804 DSP addressed these requirements. Powersoft’s Power Factor Correction (PFC) technology allows the amplifier to operate stably under fluctuating mains conditions, containing current draw, reducing harmonic distortion on the supply and contributing to cooler operating temperatures.

Additionally, the amplifier’s high-impedance (Hi-Z) output minimises signal loss across extended cable runs. In a distributed outdoor installation of this scale, Hi-Z distribution allows cables to run significant distances without major signal degradation, while enabling simpler wiring than a low-impedance system would require. Powersoft’s patented Smart Rails Management (SRM) technology further improves system efficiency by dynamically managing power rails to match load conditions, reducing energy consumption and heat.

“The Quattrocanali 4804 DSP’s multi-channel architecture allowed us to divide the system into multiple zones”, says Mai Nguyen Hung Truong, technical director at Hoang Phu Sound. The amplifiers’ Power Sharing feature automatically redistributes available power across channels to where it is needed most and operates across channels running at different impedances without any user configuration. Power Sharing provided flexible power allocation between channels, streamlining the system design.

The audio system pairs the Powersoft amplification with Bose Professional loudspeakers and a Bose ControlSpace signal processing and control platform networked via a Cisco Catalyst switch, to deliver background music across the park’s commemorative and communal spaces. For the visitors who gather at Ly Thai To Park, whether in remembrance or simply as part of their daily lives, the audio system provides a consistent, considered presence.

The equipment list comprises three Powersoft Quattrocanali 4804 DSP, one Bose ControlSpace CC-64 Control Center, one Bose ControlSpace ESP-880A Engineered Sound Processor, one Cisco Catalyst C1300-16P-2G, eighteen Bose Professional AMU208, twenty-five Bose Professional FS4SE, and six Bose FreeSpace FS2C.

(Photos: Hoang Phu Sound)

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