Sparkos, wide case 1890€
We are proud to present AUDIOPHONICS HPA-S400ET, a class D stereo power amplifier based on two PURIFI 1ET400A modules. This ready-to-use version is designed for audiophiles needing a foolproof amplification solution.
www.audiophonics.fr
Audiophonics Interface Board : Sparkos Labs OPA & Regulators
The two modules are driven in opposite phase, to cancel the "Power Supply Pumping" effect. This allows a greater stability of the power supply, distributing alternately on each rail the current calls, and thus increasing its capacities.
We opted for a two-level voltage regulation to optimize the power supply to the PDUs and the auxiliary voltage supplied to the modules. In this Sparkos Edition, no less than four Sparkos Labs SS7915 and SS7815 discrete voltage regulators are used. These easily outperform all monolithic TO-220 format regulators in terms of output noise, transient response and load regulation.
Two Sparkos Labs SS3602 dual discrete PDUs are also used. These Sparkos PDUs are more efficient than the LM4562s of the standard HPA-S400ET and offer lower noise and higher output current with Class A bias. The PDUs are mounted on a DIP8 socket, allowing replacement if necessary.
To suit all uses, we have opted for three gain settings,
switchable by jumper on the interface board:
- Gain of +7.2dB, i.e. a total of 20dB - Max power reached with a signal of ~4.2V RMS
- Gain of +12.5dB, that is to say a total of 25.3dB (by default) - Max power reached with a signal of ~2.25V RMS.
- Bypass : In this case, the signal goes directly from the inputs to the modules, allowing the lowest possible gain of 12.8dB. This mode can be interesting when using a vigorous preamplifier, capable of driving a 2 to 4kΩ load and reaching a voltage of ~10V RMS.
or
Wide case HPA 1490€
Class D stereo power amplifier based on two PURIFI 1ET400A modules and a HYPEX SMPS1200A400 power supply.
www.audiophonics.fr
Audiophonics Interface Card
Both modules are driven in opposite phase, to cancel out the «Power-Supply Pumping» effect. This allows greater stability in the power supply by alternately distributing current draws on each rail, thus increasing its overall capacities.
We opted for a two stage voltage regulation in order to optimize the power supply to the OPAs and the auxiliary voltage supplied to the modules.
A
Texas Instrument LM4562 OPA per channel is used, these are very low distortion AOPs offering the greatest transparency with a very low THD. They are mounted on socket allowing their replacement if necessary
To suit all uses we opted for 3 gain settings,
adjustable by jumper on the interface card:
- Gain of + 7.2dB, for a total of 20dB - Maximum power reached with a signal of ~ 4.2V RMS
- Gain of + 12.5dB, for a total of 25.3dB (default) - Maximum power reached with a signal of ~ 2.2V RMS
- Bypass: in this case the signal passes directly from the inputs to the modules, allowing the lowest possible gain of 12.8dB. This mode can be interesting when using a powerful preamplifier, capable of driving a load of 2 to 4kOhm and reaching a voltage of ~ 10V RMS
or
narrow case LPA with same Audiophonics interphase 1389€
We are proud to offer you the Audiophonics LPA-S400ET, a Class D stereo power amplifier based on two Purifi 1ET400A modules. This ready-built and ready-to-use version is for audiophiles who want to equip themselves with a foolproof amplification
www.audiophonics.fr
Audiophonics has also 3- and 4-channel versions with their own interface
Thread of HPA
https://www.audiosciencereview.com/...ophonics-hpa-s400et-class-d-purifi-amp.11887/
ATM sells buffer with different OPAS, and Sparkos has least distortion... (Audiophonics is not tested)
CUSTOMIZABLE Input buffer for Hypex and Purifi Audio ✔ HOW IT WORKS ✔ Design Process ✔ Technical Specifications ✔ Spectral density
atm-audio.com
