AUDIOPHONICS HPA-S450ET Power Amplifier Purifi 1ET6525SA

The Audiophonics HPA-S450ET power amplifier is based on a Class D architecture, using a pair of Purifi 1ET6525SA amplification modules, a Hypex SMPS1200A400 power supply and an Audiophonics custom buffer stage, enabling the amplifier to deliver incredible performance. Like all Audiophonics Workshop products, this HPA-S450ET is meticulously designed and assembled by hand in our workshop in France.

The Audiophonics HPA-S450ET is a powerful, robust and high-performance amplification solution. It is capable of powering demanding HiFi audio systems, while revealing sound reproduction of incomparable finesse, rich in detail and perfectly transparent. There's no compromise here between power and sonic precision. The on-board Purifi modules feature a particularly rigorous design, delivering exceptional measured performance.

All elements and components are integrated into a solid, sturdy aluminum housing with a modern, streamlined design. This chassis also features openings and side heat sinks for efficient heat dissipation. What's more, its design effectively limits the impact of interference on the audio signal.

Audiophonics HPA-S450ET: Proprietary buffer interface board

The two amplifier modules are driven in phase opposition to cancel the Power Supply Pumping effect. This makes for greater power supply stability, alternately distributing current calls on each rail and thus increasing its capacity. A voltage regulation stage is used to optimize the power supply to the OPAs and the auxiliary voltage supplied to the modules. One Audiophonics OPA1656 AOP is used per channel. These are very low-distortion PDUs, offering the highest transparency with very low THD. They are mounted on a socket so they can be replaced if necessary.

In addition, a gain control is located on the underside of the unit to suit all applications. Four gain settings are available: 12.5dB, 20dB (default), 25dB and 29dB.

Audiophonics HPA-S450ET: Balanced & single-ended connectors

Designed for easy integration, the Audiophonics HPA-S450ET features both balanced stereo input on XLR connectors and unbalanced stereo input on RCA connectors. Bipolar selectors on the rear of the unit allow easy selection of the active input, even enabling independent channel control. On the output side, insulated Audiophonics terminal blocks (developed in partnership with AEC Connectors) with 24k gold-plated contacts ensure an excellent connection between amplifier and loudspeaker. A 5-12V trigger module with input and output allows the amplifier to be integrated into an automatic on/off chain for your entire audio system.

1	ON/OFF button
2	Power input
3	5-12V trigger input
4	Right channel speaker output
5	Left channel speaker output
6	5-12V trigger output
7	Right channel balanced XLR input
8	Right channel input switch
9	Right channel single-ended RCA input
10	Left channel balanced XLR input
11	Left channel input switch
12	Left channel single-ended RCA input