MK3 UPDATES
- Difference between HE-1 MK2 and HE-1 MK3 is the chassis and display changes. No sound quality improvements.
- It has two gain modes for user select to match with the different gain power amps.
- It has double volume control can match well with the different output level sources.
- The new design apply the same board of Left and Right channels that make the design exact same,that we can measure and match the boards for assemble in the one unit to ensure the consistency.
The HE-1 MK3is a fully balanced Class A preamplifier with a built in regenerative power supply. Il fait une nouvelle puissance parfaite et la fournit ensuite au préampli. Il utilise tous les étages analogiques discrets sans amplificateurs OP ni capuchons de couplage dans le chemin du signal. Il dispose d’un étage de sortie de courant analogique ACSS à rétroaction nulle. Le préampli utilise trois transformateurs R-core (au total 260W) et plus de 100 000 condensateurs NOVER de qualité audio sont utilisés pour assurer une alimentation suffisante et fluide. il dispose d’alimentations séparées de classe A pour le régénérateur de puissance et le préampli entièrement discret qui le suit. The HE-1 MK3 uses a four-channel 100 step digitally controlled relay-based volume control to yield superb channel balance. Cela améliore considérablement l’imagerie stéréo et améliore la qualité sonore globale. Il dispose de 5 entrées analogiques. Il y a 2 RCA, 2 XLR et une seule entrée ACSS. Vous avez même une sortie ACSS disponible pour votre ampli ainsi qu’une entrée ACSS, RCA ou XLR. Le préampli peut piloter 3 ampères de puissance simultanément
ENTRÉE ANALOGIQUE
- 1. XLR balanced
- 2. RCA single ended
- 3. XLR balanced
- 4. RCA single ended
- 5. ACSS balanced (mini xlr)
SORTIE ANALOGIQUE
- Balanced (XLR)
- Balanced ACSS (4-Pin XLR)
- Single ended (RCA / Cinch)
Improvement may result in changesin specifications and design without notice. |
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S/N Ratio | > 110 dB | |
THD | < 0.0005 % | |
THD+N | < 0.0025% | |
Bande de fréquence (entrée XLR) | 20Hz – 100KHz (<4 dB ) | |
Caractéristiques de volume |
100 étapes Souper Volume exponentiel Caractéristiques | |
Gagner |
Gain élevé : +16dB Gain faible : +6dB |
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Niveau de sortie (max) | 9.5V @ RCA 19V @ XLR 6mA @ ACSS |
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Impédance de sortie | 10 ohms @ XLR >10m ohm @ ACSS |
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Impédance d’entrée |
94K ohm @ XLR < 5 ohms @ ACSS |
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Canaux croisés |
< -130DB | |
Déséquilibre des canaux |
< 0,01 DB | |
Puissance requise | 1 Version 100-120V AC 50/60 Hz 2 Version 220-240V AC 50/60 Hz |
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Power Consumption | 50W Classe A @230V ou 120V | |
Puissance du transformateur | 260W (3 transformateurs R-Core) | |
Package Weight | Environ 22 kg |
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Dimensions |
L430 X L485 X H123 (mm, entièrement en aluminium) | |
Accessories | 1x Cordon d’alimentation1x télécommande en aluminium |
HIGH PRECISION VOLUME CONTROL
Volume control consist of relay-controlled attenuators. Fully-independent, fully-balanced stereo volume controls. The volume controls feature consist of high-precision 0.05% tolerance film resistors and golden contact relays. Buffered inputs and outputs.There 4 channels volume boards are built in the unit to achieve ultimate balanced volume control. They are controlled by a digital signal controlling the high quality relays switching the precision resistors in analog area.
Quality of volume control is very important in balanced applications . It have to effectuate the four channels to work as synchronous as possible to keep the balanced signal in perfect shape. In traditional volume controls the balanced output will introduce distortion which will negatively influence sound quality and performance and might even get worse than a single ended setup and waste the advantages of balanced designed solution.
REGENERATIVE POWER SUPPLY
An integrated regenerative power supply is a proprietary electric generator built into the unit to avoid any noise from main power and deliver ultra-low noise and clean AC wave to feed the preampIt will regenerate the main power and block noise from the power line, this way the preamp is able to reproduce the most neutral and analog sound you can imagine.First a transformer converts main voltage. DC conversion is done by class A PSUs power supplies.A discrete balanced regenerative wave generator produces the new ultra-low noise wave form at 400Hz. The 400Hz frequency was chosen because they have better efficiency compared to traditional 50Hz and at this frequency, 400Hz, it will boost the sound to reproduce real and pleasant analog sound.
The balanced gain amps with powerful output stages are driving the regenerative transformers to produce the extreme clean AC power. The extreme regenerated clean AC power is send to separate class A PSUs power supplies for both left and right channel.The discrete class-A DC power supply with high input impedance will avoid any noise and allow the amplifier stages to have low output impedance at very high speed and linear at frequency spectrum.
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