AUDIOPHONICS LPA-S450ET Power Amplifier Stereo Purifi 1ET6525SA

We're proud to present the Audiophonics LPA-S450ET, a Class D stereo power amplifier based on two Purifi 1ET6525SA modules. Electronically similar to the HPA-S450ET, this version is housed in a more compact case, making it easier to use in environments where space is at a premium, and its architecture also limits the length of internal connections.

This ready-to-install, ready-to-use model is aimed at audiophiles looking for a foolproof amplification solution, with considerable power reserves and impeccable definition. PURIFI modules are among the most rigorous Class D amplification solutions on the market, with measured performance that is simply outstanding.

The result is a high level of sound reproduction, suitable for use with demanding speakers, large listening rooms or studio applications requiring considerable headroom without compromising on the precision and richness of the audio message.

All components are housed in a sober, robust and compact aluminum case. It features openings to facilitate heat dissipation. Its design also limits the impact of interference on the signal.

Audiophonics LPA-S450ET: Audiophonics interface board

The 2 modules are controlled in phase opposition, to cancel the “Power-Supply Pumping” effect. This makes for greater power supply stability, alternately distributing current calls on each rail, 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 OPA is used per channel. These are very low-distortion OPAs offering the highest transparency with very low THD. They are mounted on a DIP8 socket, allowing them to be replaced if necessary.

To suit all uses, we have opted for 4 gain settings, selectable via jumper on the underside of the unit: 12.5dB, 20dB (default), 25dB and 29dB.

Audiophonics LPA-S450ET: Connectors

Designed for easy integration, the LPA-S450ET features both single-ended (RCA) and balanced (XLR) stereo inputs. Bipolar selectors make it easy to change input sources, and even allow independent control of channels.

At the output, BP-207 carbon / 24k gold insulated terminal blocks Ø5.5mm ensure an excellent connection with the speakers.

Moreover, a 5-12V Trigger In operating on a 3.5mm mono jack allows the amplifier to be switched on automatically.

Audiophonics LPA-S450ET : THD vs Freq

Audiophonics LPA-S450ET : THD+N

Audiophonics LPA-S450ET : Frequency response

Test du AUDIOPHONICS LPA-S450ET par QOBUZ

If we had to keep just one power amplifier, it might just be this Audiophonics LPA-S450ET. It isn’t an entry-level product. But it’s equally far from the high end, and yet, it offers impeccable sound reproduction capabilities, both on paper and in practice. The power is there, but it takes a backseat to the music, which is reproduced with all its finesse, complexity, and presence. The LPA-S450ET will be a solid foundation to any high-quality Hi-Fi system.