Serene is a preamplifier from HoloAudio. Serene adopts a fully balanced structure. The left and right channels  are completely separated to form a fully balanced structure. Each channel has independent amplification modules to complete the buffering and amplification functions.

This design is able to solve the shortcomings of transistors, so that its tone can exceed the limits of traditional transistors. It also has both the advantages of tubes and transistors. And the use of a large number of transistors makes the linearity of the amplifier superior in every way. The volume control of the Serene is a fully balanced stepping device controlled by a relay. Each step is 1 dB volume. The advantage is that the noise is minimal, and it can be precisely controlled, even at a low volume the left and right channel will not be biased.

Holo audio caps and a 7N O-type transformer as well as CNC Remote Control  are included in the base model.

Serene Product Description:

Serene L1(Standard) and L2(KTE):

Standard Model includes:

• 7N copper, round wire O-type transformer, which was used in the Spring 2 (non-KTE)
• Standard copper hook-up wire
• Schurter Gold Fuse, same fuse used in Spring 2/May (non-KTE)
• Standard capacitors / HoloAudio, audio grade capacitors
• CNC Aluminum Remote Control

KTE Serene Model includes:

• Flat copper wire O-type transformer which was also used in the Holo Audio May DAC.
• Pure silver wire from IEC to power board w/Silver Rhodium plated Faston connectors
• Red nano fuse we used in the HOLO Audio May KTE.
• Holo audio caps and a 7N O-type transformer
• 4pcs 5uF/350V Bi-polarized AudioNote Kaisei capacitors.
• CNC Aluminum Remote Control
• KTE emblem on top of chassis

Specifications for Input/Output and Physical characteristics: