Holo Audio – Serene PreAmplifier


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 Pre-Amplifier

By Holo Audio

The Serene Pre-Amp is here!

Currently production time is estimated for about 5-6 weeks from time you place your order. We appreciate your patience and understanding. We will likely deliver before this time, but this is an estimate for new orders. Inventory shown on the website is to control sales volume only.


Here at Kitsune HiFi, we have two build specs. of the Serene Preamp.

Prices are as follows for Serene lineup:

Serene (standard model) = $2398.00 + S&H

KTE Serene = $ 2798.00 + S&H

As of April 2020 shipping costs on all HOLO Audio products have gone up significantly due to COVID19. This is out of our control.

More about the Serene Pre-Amplifier, what is included in the design


You may be asking… well what is so special about this preamplifier and its 8 modules…what is this?

More information coming soon…..   product page is under construction……..

Product Description:


More information coming soon…..   product page is under construction……..

Info on Red Nano Fuse type used:

Single crystal nano fuse
Specification: 5X20mm @2A(220v) or 4A(110v)
Withstand voltage: 250V (T) slow speed
Features: This product is complicated in process, special materials can not be made, this fuse is 100% pure handmade!
Tip: Input in different directions, the tone is different. Can try different directions
This fuse structure is relatively complicated, it is handmade, so the cost is not cheap, the structure is crimped, the contacts are firm and reliable, plated 24K gold, non-chemical gold. The fuse is made of imported single crystal silver-copper alloy. After nano-processing, note that the fuse is directional after nano-processing. The inner filling of the quartz sand is filled with nano-graphite, and the graphite has ultra-high conductivity and high anti-interference characteristics. The sound is beautiful, soothing and strong in layering. This is the flagship
product of high-end fuses so far.
Fill the fuse with 2 heads of quartz sand for good shock absorption and arc extinguishing. In the middle is graphene, which has the advantages of ultra-high conductivity and anti-interference. The fuse is a single crystal silver-copper alloy containing 10% precious metal, treated with nanographene, and stranded with a single crystal silver.
The fuse cap is stamped from 99.99% 4N copper, one end is plated with 24K gold and one end is plated with sterling silver. Increasing the conductivity and the speed of the power supply make the fuse and the socket highly accessible.
The fuse is firmly pressed by a large one and two small caps made of 4N copper. This process protects the fuse in the middle of the fuse. The fuse and the cap are in good contact and the contact is firm, which can prevent the microphone effect. Reduce the oscillation of current passing, making the sound quality more pure and the image more stable.
The inside is filled with two quartz sands, and the middle is filled with nano graphene. Graphite has super high conductivity, high anti-interference and other characteristics, and the sound is beautiful, soothing and strong. It has great benefits for sound quality and security, but it can only be handmade.
The ceramic tube has anti-resonance and eliminates the effect of the microphone sound.
The fuse is made of a single crystal silver-copper alloy, and a very fine single crystal silver wire is wound to correct the sound. After nano-treatment, it has excellent two-end extension, transient response, dynamic and musical sense.

Fuse Type for KTE:

Shurter Gold fuse type

Serene’s input and output interface:

More information coming soon…..   product page is under construction……..

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

Kitsune, KTE Edition includes:

  • CNC Aluminum Remote Control
  • 4pcs 5uF/350V non-polar AudioNote Kaisei capacitors
  • HoloAudio, audio grade capacitors
  • Flat wire o-type transformer.
  • Red nano fuse (as used in HOLO Audio May KTE)
  • CNC Aluminum Remote Control
  • KTE badging



  • Flat copper wire O-type transformer which was also used in the Holo Audio May DAC.
  • Pure silver wire from IEC to power board.
  • Red nano fuse we used in the HOLO Audio May KTE.
  • Holo audio caps and a 7N O-type transformer
  • 4pcs 5uF/350V non-polar Kaisei capacitors.
  • CNC Aluminum Remote Control

Kitsune, KTE Edition includes:

    • Holo Audio audio caps
    • flat wire o-type transformer.
    • red nano fuse
    • KTE cover
    • CNC Aluminum Remote Control


Analog Input
Single-ended RCA input (QTY 3) Maximum amplitude 12Vpp
Input impedance 6.8KΩ
Balanced XLR input (QTY 2) Maximum amplitude 24Vpp
Input impedance 13.6KΩ
Analog Output
Single-ended RCA output Maximum amplitude 8.5Vrms
Output impedance 20Ω
Balanced XLR output 1 Maximum amplitude 17Vrms
Output impedance 3Ω
Balanced XLR output 2 Maximum amplitude 17Vrms
Output impedance 40Ω

Physical Characteristics

Size 430x300x55mm / 16.93×11.81×2.17inches (W x L x H, Dimensions do not include protruding parts)
Weight 9kg/19.84lbs


Power Input (configurable, see label on bottom of unit for specified input) 220-230V 50/60Hz – Fuse Type 2A SB 5x20mm
110-115V 50/60Hz – Fuse Type 4A SB 5x20mm
Power consumption 30W

WARRANTY – 3 years warranty, both parts and labor, coverage of one way shipping (return shipping at cost to seller once product is confirmed as a warranty claim issue). Be sure to buy directly from HoloAudio or authorized reseller, we recommend purchasing from HoloAudioUSA<– this is KitsuneHiFi 😉 – Support is given from where you choose to purchase.

Shipping Information

This is special order item (will show “in stock” if able to order, this means we have the parts available for this Pre-Amp. and the order can be placed), expect a typical 5 – 6 weeks (estimated) delivery time to USA customers.

( Items listed in-stock are NOT ready to ship, this means we have enough components on hand to build them)

We are working our best to keep up with demand. You will get estimated time for production and shipping with your order.

We will give you a current estimate upon receipt of payment, if it is different than standard production time, as this is considered a special order item there will be no cancellations or refunds if 48 hours past date of order placement. This product has multiple levels of quality control testing before it is shipped to you and is guaranteed to not be DOA. We are confident you’ll be happy with your purchase.

Holidays may impact delivery dates, including Chinese new year, which will add an additional 2 weeks to production and shipping time. This is out of our control due to parts sourcing delays.

Non-USA and Non-Standard AC Models:

NON USA customers please contact us for quote on shipping costs. Shipping estimates vary, please email us for a current quote.

“NOTE FOR NON-USA Customers: Be sure to say in notes what volt ac model you need, USA is 110 volt ac standard etc. (ie: 220/230/240V) – Also note if you ask for special voltage transformer that it can delay your order up to a week of additional time.”

Please include your full shipping address (clearly include and label information such as province, districts, cities, towns, zip/area codes, etc.) and phone number along with voltage requirements when requesting to order this Pre-Amp. Note: Delays will occur, if your shipping address is rejected upon invoice creation as these orders are manually created.

The same terms apply and estimated production times quoted above. Shipping times may vary by country/location of shipment.

If you are in Europe, please contact our European Authorized HoloAudio Dealer for the best service and support in your area, Magnahifi.com



Kitsune HiFi carefully chooses products that we want to offer to our customers and be unique and/or stand out from all these audio supply stores. Jeff Zhu is a very talented engineer and is the brains behind HOLO Audio.



Tim & Dawn Connor – HoloAudioUSA and KitsuneHiFi

We operate under strict business ethics and principle values. Our company motto we are always proud to mention to our customers, “Time will tell…” and this means that our products will earn the respect in a matter of time once people get their chance to test it themselves. Many companies need fancy buzz words and marketing to sell their products, we truly only need our customers to try our products and share their experience with others. Word of mouth is how our business thrives and we have many happy customers! We encourage others to try all the competition in the market and directly compare and see what type of value you are receiving. We are confident in our products and know that in time, our products will sell themselves once people get a chance to try them.  We offer tremendous value and quality without sacrificing on performance.


Jeff Zhu – HoloAudio  – founder/engineer

Jeff Zhu is the man behind this engineering achievement. Below are some comments that have been shared by Jeff to better explain this DAC in his own words.  HoloAudio is founded by Jeff Zhu and the USA division was a partnership formed with Tim Connor and his wife, Dawn Connor

Our products are CE Certified for the European Market


Additional information

Weight 42 lbs
Dimensions 16.93 × 11.81 × 6 in

Serene, Serene KTE


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