Erato Ultima is an EL84 OTL class A headphones amplifier and preamplifier. Erato has a very low output impedance so it can drive any type of headphones.
All electronic components are through hole type soldered by hand.
Erato Ultima comes with 3 single ended line inputs. Erato provides a 6.35mm phones jack connector along with a 4 pin XLR to plug in your headphones. Additionally Erato provides a preamplifier output.
Gold plated RCA and XLR connectors are implemented for the signal inputs/outputs.
For the volume control the classic blue Alps is used.
Carefully selected values and types of the electronic components contribute to the reliable circuits operation and the high sound quality of Erato Ultima. Premium quality oil capacitors (Mundorf Supreme Silver Gold Oil – Rike Ausdio QCap4 Copper Oil) capacitors are used on the signal path. The power supply circuit uses LC filtering with a large amount of capacitance and a power choke to provide a very clean and ripple free DC high voltage to the tubes.
The meticulous PCB design ensures excellent behavior in SNR, distortion and channel separation. Power wiring uses high quality copper cables of more-than-needed AWG gauge, to achieve low impedance power transfer. All power cables are twisted in pairs to minimize the electromagnetic interference.
The handmade power transformer and choke are tested thoroughly for quality and reliability.. The positioning of the power transformer is such that minimizes the interference with the electronic circuits. Furthermore the transformer has copper foil shielding.
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