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![[GRADE B] AUDIOPHONICS HPA-S500ET Power Amplifier Class D Stereo Purifi 1ET7040SA 2x500W 4 Ohm](https://www.audiophonics.fr/68112-thumb_default/audiophonics-hpa-s500et-stockb.jpg)
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Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.
This device is supplied as standard with a 230V AC supply voltage. If you require a 110V input voltage, please select this using the switch on the underside of the device before connecting it to the mains.
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.
Each channel of the Audiophonics HPA-S450ET amplifier circuit is equipped with its own Purifi 1ET6525SA amplifier module. These use high-performance Class D architecture, with available power of 2x450W into 4Ω or 2x230W into 8Ω (at 1% THD) and high efficiency of over 94%. They also guarantee a very low level of THD, intermodulation distortion and noise, for a rich, precise and perfectly transparent sound reproduction, perfectly respecting the original audio signal to reproduce your music with unequalled fidelity and without coloration. It also guarantees a wide, realistic sound image, for perfect immersion.
Purifi's ongoing research into non-linear control theory has led to the development of the first mathematically accurate large-signal model for self-oscillating amplifier controllers. This breakthrough enables the feedback circuit to be fully optimized, resulting in a significant performance improvement over other designs. What's more, these Purifi 1ET6525SA modules feature a complete protection system for enhanced durability.
The power supply stage of the Audiophonics HPA-S450ET uses an ultra-high-efficiency Hypex SMPS1200A400 switch-mode power supply module, capable of developing 1200W of power. This has been specifically designed and developed by Hypex to provide the voltage required for optimum operation of the amplifier modules.
This high-quality, low-noise power supply perfectly meets the energy requirements of the Purifi 1ET6525SA amplifier modules. What's more, the amplifier modules themselves have an excellent ability to reject power supply noise. As a result, the HPA-S450ET is highly insensitive to power grid imperfections and voltage/current variations that can cause parasitic noise.
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.
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.
This amplifier's trigger needs to be used with a mono trigger cable (sold separately).
| 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 |
Technical characteristics
| Specifications | |
|---|---|
| Product type | Power amplifier |
| Amplification modules | 2x Purifi 1ET6525SA |
| Number of channels | Stereo (2) |
| Amplification type | Class D |
| Output power | 2x230W @ 8Ω, 1% THD 2x450W @ 4Ω, 1% THD 2x510W @ 2Ω, 1% THD |
| Efficiency | > 94% |
| Inputs | 1x Balanced stereo XLR 1x Single-ended stereo RCA |
| Output | Speaker terminals |
| Trigger | 5-12V in/out on mono Jack 3.5mm |
| THD+N | 0.00035% @ 1W, 1kHz 0.0001% @ 10W, 1kHz 0.00005% @ 100W, 1kHz 0.00035% @ 1W, 20Hz-20kHz 0.00029% @ 10W, 20Hz-20kHz 0.0001% @ 100W, 20Hz-20kHz |
| IMD (CCIF) | 0.0000003% @ 1W, 18.5kHz+19.5kHz 0.0000006% @ 10W, 18.5kHz+19.5kHz 0.0000005% @ 100W, 18.5kHz+19.5kHz |
| IMD (DIM) | 0.002% @ 1W, DIM30 0.002% @ 10W, DIM30 0.009% @ 100W, DIM30 |
| Idle noise (ICN) | 6.6µV @ A-wt |
| Dynamic range | 137dB @ A-wt |
| SNR | 137dB @ A-wt |
| Frequency response | ±0.01dB @ 8Ω, 20Hz-20kHz ±0.01dB @ 4Ω, 20Hz-20kHz ±0.01dB @ 2Ω, 20Hz-20kHz |
| Input impedance | RCA : 10kΩ XLR : 20kΩ |
| Output impedance | 0.03mΩ @ 1kHz, 1A < 0.35mΩ @ 20Hz-20kHz, 1A |
| XLR Gain / Input sensitivity for max power @ 1% THD | 12.5dB / 10.06Vrms 20dB / 4.24Vrms 25dB / 2.39Vrms 29dB / 1.51Vrms |
| RCA Gain / Input sensitivity for max power @ 1% THD | 12.5dB / 5.03Vrms 20dB / 2.12Vrms 25dB / 1.24Vrms 29dB / 0.75Vrms |
| General | |
|---|---|
| Supply voltage | 110-230V AC (switchable, selection switch under the device) |
| Housing material | Aluminum |
| Total dimensions (WxDxH) | 435 x 355 x 73mm |
| Weight | 4.27kg |
| Color | Black |
| Package | 1x Audiophonics HPA-S450ET 1x Power cord |
| Input | RCA |
| Input | XLR |
| Output | Speaker terminal |
| Color | Black |
| Channel | 2 (Stereo) |
| Class | Class D / T |
| Amplifier chip | 1ET6525SA |
| Power (W) | 450.0 |
| Remote Control | No |
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