AUDIOPHONICS HPA-Q450ET Power Amplifier Four Channel

The Audiophonics HPA-Q450ET power amplifier is based on a Class D architecture, using four Purifi 1ET6525SA amplifier modules, two Hypex SMPS1200A400 power supplies and an Audiophonics custom buffer stage, enabling the amplifier to deliver incredible performance. This four-channel version is aimed at audiophiles and home theater perfectionists looking for a foolproof amplification solution, with considerable power reserve and impeccable linearity. Like all Audiophonics Workshop products, the HPA-Q450ET is meticulously designed and hand-assembled in our workshop in France.

The Audiophonics HPA-Q450ET is a powerful, robust and extremely precise amplification solution. It is capable of powering demanding HiFi or home theater audio systems, while delivering 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.

With its four channels, the HPA-Q450ET is ideal for integration into a home theater system, providing power for front speakers, a center channel and a passive subwoofer.

All elements and components are integrated into a sturdy, solid aluminum housing with a modern, uncluttered design. This chassis also features openings and heat sinks on the sides to dissipate heat efficiently. What's more, its design effectively limits the impact of interference on the audio signal.

Audiophonics HPA-Q450ET: Proprietary “Buffer” interface card

The four 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 two-level voltage regulation is used to optimize the power supply to the AOPs 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-Q450ET: Balanced connectors

The Audiophonics HPA-Q450ET features balanced inputs on XLR connectors. At the output, Audiophonics insulated terminal blocks (developed in partnership with AEC Connectors) with 24k gold-plated contacts ensure an excellent connection between amplifier and loudspeakers. 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.

With its four channels, the HPA-Q450ET can be used in both HiFi and home theater systems. In the latter case, it can perfectly power two front speakers, a center speaker and a passive subwoofer.

1	ON/OFF button
2	Speaker output
3	Speaker output
4	Power input
5	5-12V trigger input
6	Speaker output
7	Speaker output
8	Balanced XLR input
9	Balanced XLR input
10	Fuse
11	5-12V trigger output
12	Balanced XLR input
13	Balanced XLR input