New Customer?
Create your accountNo products
Prices are tax included
Configure gain, bypass and LED on Audiophonics Purifi and NCoreX amplifiers
This topic concerns only the following amplifiers:
If you purchased your Purifi amplifier before April 2023, please refer to this article for the configuration of gains: Set Gain & Bypass on Purifi Amplifier module.
Some of our Audiophonics power amplifiers based on Purifi, NCore or NCoreX modules are controlled by an interface board (driver) specially developed by us. This provides you with a number of settings: 4-level gain adjustment, the option of activating or deactivating the buffer and management of the LED on the front of the device (for some).
These settings are directly accessible via a series of jumpers and DIP switches under the device. We detail here all the available settings and the associated jumpers and DIP switch positions.
Gain setting
The driver module integrated in these amplifiers has a gain level adjustment. This one allows to select a gain value among 4 available. These values are different depending on whether you have an amplifier based on a Purifi or NCoreX architecture.
Purifi
The amplifier is by default set to a gain of 26dB. The setting is made with a DIP switch on the bottom of the unit. The other available values are the following:
Depending on the selected gain level, the input sensitivity needed of the source signal varies to reach the maximum power of the amplifier:
| Gain | Input sensitivity needed for max power |
|---|---|
| 20dB | 4.19Vrms |
| 26dB | 2.07Vrms |
| 32dB | 1.05Vrms |
| 34dB | 0.83Vrms |
NCoreX
The amplifier is by default set to a gain of 25dB. The setting is made with a DIP switch on the bottom of the unit. The other available values are the following:
Depending on the selected gain level, the input sensitivity needed of the source signal varies to reach the maximum power of the amplifier:
| Gain | Input sensitivity needed for max power |
|---|---|
| 19dB | 5.33Vrms |
| 25dB | 2.67Vrms |
| 31dB | 1.5Vrms |
| 33dB | 1.2Vrms |
Enable / disable the buffer
Our Purifi and NCoreX amplifiers include a preamp section called buffer with variable gain shown above, it is activated by default.
However, it is possible to bypass it using the Bypass jumper. In this case the XLR or RCA input is directly connected to the amplifier module.
The overall gain will then be equal to the nominal value of the module, approximately 12.5dB.
This configuration is to be used with a powerful preamplifier, capable of driving a 2-4kohm load with 10Vrms.
This adjustment is made using a jumper under the device.
Enable / disable the LED on the front panel
Each of our Audiophonics Purifi and NCoreX amplifiers has an ON/OFF button with an LED on the front panel. This one is activated by default but it is possible to turn it off thanks to a jumper under the amplifier.
Audiophonics Purifi AP300-M400ET not concerned.
Produit en rapport avec cet article
Rechercher dans le blog
Blog categories
Latest Comments
christian cheignon
on Install picorePlayer 8.2 on a rasptouch
Audiophonics Team
on Install picorePlayer 8.2 on a rasptouch
christian cheignon
on Install picorePlayer 8.2 on a rasptouch
Audiophonics Team
on Install picorePlayer 8.2 on a rasptouch
![[GRADE S] FURUTECH FP-S55N LIMITED EDITION Power Cable OFC Copper Silver Gold Nano Liquid Alpha Treatment 5.26mm² Ø18mm 2.65m](https://www.audiophonics.fr/60802-thumb_default/furutech-fp-s55n-limited-edition-power-cable-ofc-copper-silver-gold-nano-liquid-alpha-treatment-526mm-o18mm.jpg)
![[GRADE B] IFI AUDIO ZEN STREAM Hi-Res Audio Streamer WiFi DLNA 32bit 384kHz DSD256 MQA](https://www.audiophonics.fr/60791-thumb_default/ifi-audio-zen-stream-hi-res-audio-streamer-wifi-dlna-32bit-384khz-dsd256-mqa.jpg)
English 
Français 
19 Commentaires
Laisser un commentaireTonny Hooijer 2024-01-30
Audiophonics Team 2024-01-31
Yes with such output level you can bypass the gain buffer.
Tonny Hooijer 2024-02-01
More laid back even and muddier lows... i set buffer to lowest gain . The sound is fantastic of this amp now. The build quality is awesome... Love it!
Luis Ignacio Rojas Godina 2024-01-18
Audiophonics Team 2024-01-29
Son niveau de sortie normal est ligne (4Vrms) ce qui correspond à un réglage de gain de 20dB : https://www.audiophonics.fr/fr/blog-diy-audio/41-configurer-le-gain-bypass-et-la-led-sur-les-amplificateurs-audiophonics-purifi-et-ncorex.html
Philippe BRAY 2023-09-07
Je comprends la carte driver réglable sur 4 niveaux de sensibilité, mais pas sûr de saisir la fonction spécifique du buffer et du by-pass.
La génération précédente proposait, si j'ai bonne mémoire, 2 niveaux de sensibilité et la possibilité de by-passer la carte d'entrée pour attaquer directement le module ampli - est-ce la même chose, ou en quoi est-ce différent ?
Merci !
Audiophonics Team 2023-09-12
Il est aussi possible de la contourner totalement, pour attaquer directement le module d'ampli avec un préampli externe.
Dans ce cas on dit qu'on le bypass.
József Kovács 2023-08-29
I have a DAC-9 form Nuprime and it has RCA 4V and XLR 8V-s max output if I buy an LPA or HPA-S400ET how I should set the DIPs and jumpers for that.
This DAC can drive difficult AMPs I had LINN LK2 on it with an input impedance of 5000. I needed to be careful not to saturate that amp.
How it would be with the Purify ?
Many thanks for your answer.
Audiophonics Team 2023-09-12
The level is not high enough to be able to use the Bypass mode, configuration 1 is gonna be the best choice : https://www.audiophonics.fr/fr/blog-diy-audio/36-configurer-gain-bypass-sur-module-amplificateur-purifi.html
Best regards
Dan Berilloux 2023-08-07
Je vais l'associer à un Streamer/DAC EMERSON de chez Wattson, et probablement bientot au Madison (pour la qualité de son preamp et le le potentiometre de volume ... plus safe que via l'application mobile). :)
Que pensez vous de l'association de manière generale, compte tenu de la tension de sortie (respectivement 2V en RCA et 4.2V en XLR)?
des conseils concernant les reglages Gain et Buffer ?
Je suis sur des enceintes à rendement superieur à 100db/w/m
Merci pour vos conseils !
Audiophonics Team 2023-08-07
Il existe beaucoup mieux dans cette tranche tarifaire mais cela fonctionnera parfaitement.
Ces appareils asymétriques ne vous permettent pas de sortir du réglage de gain par défaut (maximum).
N'hésitez pas à contacter notre support technique pour toutes questions supplémentaires.
En vous remerciant par avance.
Cordialement
Dan Berilloux 2023-08-16
J’ai bien les jumpers pour choisir un des 4 niveaux de gain…. Je demandais lequel sera le plus adapté compte tenu de la tension de sortie du dac 4.2v.
Et je ne comprends pas non plus ce que fait le Buffer on/off ?
Audiophonics Team 2023-09-12
Avec ce niveau de sortie le réglage idéal est la configuration 1 (20db) : https://www.audiophonics.fr/fr/blog-diy-audio/41-configurer-le-gain-bypass-et-la-led-sur-les-amplificateurs-audiophonics-purifi-et-ncorex.html
Désactiver le Buffer coupera tout réglage de gain.
Cordialement
Axel Endriss 2023-08-05
Apart from this I like to use the chance to praise this amplifier. It really sounds very good :-)
Best regards Axel
Audiophonics Team 2023-09-04
Yes older models also have gain settings ( accessible only by opening the device) but not led on / off possibility.
Best regards
Axel Endriss 2023-08-05
due to that it's new that the jumpers are accessable under the device I would appreciate if you would offer here also the description for the older models were the jumpers are inside, perhaps together with the information starting from when this changed.
Best regards Axel
Audiophonics Team 2023-09-04
https://www.audiophonics.fr/en/blog-diy-audio/36-set-gain-bypass-on-purifi-amplifier-module.html
Best regards
Jean-Philippe Roi 2023-05-15
Cordialement.
Audiophonics Team 2023-05-16
Merci pour votre intérêt pour nos produits.
Avec l'association Ncorex hpa s600 et un dac advance dx1 utilisé en tant que préampli, nous vous conseillons de choisir le gain bas sur les amplificateurs. En effet, le DAC advance dx1 a une sortie symétrique de 4V qui est suffisante pour alimenter les amplificateurs sans risque de saturation ou de distorsion. Le gain bas vous permettra également de bénéficier d'une meilleure dynamique et d'un meilleur rapport signal/bruit.
Nous vous recommandons également en effet de ne pas mettre en mode bypass le buffer de l'amplificateur.
Nous espérons que ces informations vous seront utiles. N'hésitez pas à nous recontacter si vous avez d'autres questions.