No you have to open it and play with jumpers. Explained here: https://www.audiophonics.fr/en/blog...-bypass-on-purifi-amplifier-module-ampli.htmlDoes the AUDIOPHONICS LPA-S400ET contain a 5-12V trigger?
No you have to open it and play with jumpers. Explained here: https://www.audiophonics.fr/en/blog...-bypass-on-purifi-amplifier-module-ampli.htmlDoes the AUDIOPHONICS LPA-S400ET contain a 5-12V trigger?
No you have to open it and play with jumpers. Explained here: https://www.audiophonics.fr/en/blog...-bypass-on-purifi-amplifier-module-ampli.html
my misunderstanding, no the trigger is not there in the small-case version. Should be in the larger case (the one tested by Amir)A trigger input is a 3.5mm TS connector that allows the amp to be turned on by applying a 5-12V DC potential. The trigger is usually driven by a source or preamp. On the amp side, the trigger input usually terminates in an opto-coupler, providing galvanic isolation.
Sorry for my ignorance.The HPA-S400NC one is using a Hypex NC400 module, so it's different tech. Name's similar because it's still a stereo nominal 400W-per-channel power amp.
If you wanted a "super" Purifi design, rather than a competent one, you'd have to look at something like the Vera Audio where some real work has been done to measure and optimise and tune. Not just swapping bits and not even publishing results...
Sorry for my ignorance.
How are the S400NC using NCore or the S400ET using Purifi different? Is one or the other objectively better in some way? Eg, lower distortion, better dynamics, less heat etc.
Add the Nilai500 stereo kit as an excellent choice for 1225 euros.Thanks for the reply.
The Purifi is newer AND cheaper than the NCore version for the 2 x 400W amp, while both being excellent, it's quite a no brainer choice to get the Purifi. I might get two monoblocks for my speakers.
For the NCore stereo amps however, the HPA S500NC (999 EUR) is much cheaper than the S400NC (1690 EUR), I wonder why the higher powered amp is cheaper?
From those specs you should be absolutely fine driving the Purifi amp via the XLR with the input stage bypassed, and that should produce the best results. The pre-amp's lower-than-average output impedance means it will cope with the Purifi's lower-than-average input impedance.
It's bypassing the buffering op-amp initial gain stage. The core Purifi power module is not very high-gain, and also has a quite low input impedance, so is not well-suited to connect directly to most typical 1-2V pre-amp line outputs - particularly ones from AVRs.Thanks. I must ask a dumb question. What is the bypass mode actually bypassing?
I have the Sparkos version of the amplifier. Will the amp still be using the Sparkos SS3602 OPA & SS7815 + SS7915 Voltage Regulators in the same way in the bypass mode as in other configurations?
It's bypassing the buffering op-amp initial gain stage. The core Purifi power module is not very high-gain, and also quite low impedance, so is not well-suited to connect directly to most typical 1-2V pre-amp line outputs - particularly ones from AVRs.
So another amplifier stage is stuck in front to add ~13dB of gain, and provide a higher impedance input.
And that would be the Sparkos SS3602 + SS7815 in your amp. They would be out of circuit in the bypass mode.
(Some other Purifi amps, like Apollon's, don't totally bypass the initial amplifier, but can switch it to unity-gain mode, so it's still buffering and providing high impedance. But most fully bypass like the EVAL-1 kit did).
If your upstream amplifier can already provide high enough level, and drive low impedances, leaving out the extra stage altogether should benefit overall performance. One less thing in the chain.
But that does mean buying an amp with boutique high-cost op-amps is totally pointless - not even merely debatable, as it would be if it was in-circuit. At least, until a change of installation means you need to use it.
Thanks. The Holo Serene has two pairs of XLR outputs, one of which has an output of 17 Vrms and impedance of only 3ohms while the other pair is 40 ohms. The 3 ohms output impedance of the Serene preamp is really convenient to make it a good match with pretty much any amplifier.I'm not going to go through the specs of all possible equipment, but you need something that can output 9.6Vrms, and can cope with an input impedance of 2.2kOhm (RCA) or 4.4kOhm (XLR).
If something quotes an output impedance instead, you want it to be at least 10 times lower than the above numbers, so 220/440ohm, preferably even lower, like your Holo Serene.
A bit less than 9.6Vrms would be okay, but that's what you would need to get the maximum 400W out into 4 ohm speakers.
This is before tax. Also you need some cables and an enclosure.Add the Nilai500 stereo kit as an excellent choice for 1225 euros.
I think the kit already has the complete package, including chassis, connectors and inner cables, like their NC400 kit had. But let's see when it starts actually selling.This is before tax. Also you need some cables and an enclosure.