HoloAudio – Serene Pre-Amplifier

(2 customer reviews)


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.

Choose an option
HoloAudio - Serene Pre-Amplifier - Serene KTE

In stock

KTE Serene - This is Kitsune Tuned Edition (KTE) model of the Serene Pre-Amplifier note: this version includes a CNC remote control, Holo Audio Caps, Flatwire Otype transformer, AudioNote Kasei Caps, Mundorf Evo Gold, Elna Silmic2, Nichicon Muse, Only North America include AC power cable.
HoloAudio - Serene Pre-Amplifier - Serene

In stock

Serene Standard model - This is standard model of the Serene Pre-Amplifier note: this version includes a remote control, HoloAudio Caps, Mundorf Evo Gold, Standard round wire Transformer. Only North America include AC power cable.


Serene Pre-Amplifier

By HoloAudio

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) = $2698.00 + S&H

KTE Serene = $ 3098.00 + 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.

Serene Product Description:

A new generation of fully discrete preamplifiers.

  • The Serene “晴” adopts a true and fully-balanced design from end to end, with 4 sets of channels, left and right channels each form a fully-discrete design, each channel has two fully-discrete and separate amplification modules to complete buffering and amplification (attenuation) functions. For a total of 8 amplification modules.
  • The 8 amplification modules of Serene “晴” are of a fully discrete design. The shortcomings of the transistor itself are solved through structural design and implementation. Its tone can exceed the limitations of traditional transistors. Using significant amounts of paired transistors delivers superior linearity and also has the advantages of electron tubes and transistors at the same time. Its tone can exceed the limitations of traditional
  • Serene’s “晴” power supply is a completely independent structure from the secondary transformer. This is a dual mono amplifier placed in a chassis, so it has a full frequency >130dB performance of channel separation, so that the sound field is perfectly reproduced.
  • Serene “晴” volume control is a fully balanced stepping device controlled by relay-controlled gain stage. Relays are the finest quality with Silver Palladium (AgPd) Gold Plated contacts. For a total of 84 steps, each step is 1db volume, and provides a volume control from -78dB to +6dB. Its advantage is that it has ultra low noise and can be accurately controlled at low volume without causing the phenomenon of left and right channels having unmatched levels. The matching degree of left and right channels in all volume ranges are within +/-0.1dB.

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

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 has a complicated process, special materials can not be mass produced so this fuse is 100% pure handmade!
This fuse cost is high due to the materials and labor. The structure is crimped, the contacts are firm and reliable, plated 24K gold, non-chemical process  gold plating. 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 layering is superb. This is the fuse we use in our flagship products.
The fuse is filled with 2 grades of quartz sand for good shock absorption and arc prevention/elimination. 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 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 with two 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 with the ceramic tube. This process will reduce the oscillation of current passing.
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.
Tip: Input in different directions, the tone is different. You can try different directions
KPure silver wire from IEC to power board w/Silver Rhodium plated Faston connectors (KTE model)



Bi-polarized AudioNote Kaisei capacitors. Mundorf Mcap Evo SIlverGold, Nichicon Muse, Elna Silmic II, HoloAudio 1uF caps (KTE model)


Specifications for Input/Output and Physical characteristics:

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 (this can actually be used to power headphones from this output using adapter that is dual 3pin F XLR to single 4pin F XLR) 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. HoloAudio products are assembled in China and shipped out from HK. 

Non-USA and Non-Standard AC Models:

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

“NOTE FOR NON-USA/CAN 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

If you are in South Korea, please contact our dealer in South Korea – SonorisAudio 


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

Youtube Review :

Active vs passive preamplifiers? – Holo Serene Preamp Review (and GoldPoint)

Additional information

Weight 42 lbs
Dimensions 16.93 × 11.81 × 6 in

Serene, Serene KTE

2 reviews for HoloAudio – Serene Pre-Amplifier

  1. Charles (verified owner)

    The Holo May DAC was such an obvious improvement from my Benchmark DAC3 that I was intrigued when Holo released the Serene preamp.

    I’ve been using the May DAC Kitsune edition through a Benchmark HPA4 preamp going to a Benchmark AHB2 amp and out to my Harbeth 30.1 Anniversary speakers. Adding the May DAC moved things into an entiirely new realm of detail, space, bass texture, and timbre. It wasn’t subtle.

    The Benchmark HPA4 preamp measures extremely well, so I wasn’t sure if the sound could get much better. Then I saw the Holo Serene review by Goldensound on YouTube. Four things interested me 1) using extremely resolving, top-notch headphones (HiFiMan Susvara), he heard no difference in treble and mid-range between his balanced Goldpoint passive attenuator and the Serene, an active preamp; 2) however, in the bass he heard more weight and texture; 3) the base model Serene measures even better than the already exceptional HPA4 ; and 4) Goldensound mentioned his aversion to the dry, bleached sound (relatively) of well measuring preamps with modern feedback/feedforward circuits (like the HPA4’s THX technology). https://www.youtube.com/watch?v=lD2Fj1tTu8Y

    I wasn’t sure if his observations and opinions would add up to an improvement in my system switching to the Serene, so I got in touch with Tim at Kitsune. He owns the Benchmark HPA4, and he also preferred the Serene enthusiastically. Sure, he’s the American dealer for Holo, but he did mention the caveats other than the 1 dB steps on the volume control vs. 0.5 dB on the HPA4. His preference seemed quite sincere (and the 1 dB steps are actually more convenient, in my experience).

    Considering the resale value of the HPA4, it wasn’t a huge investment (in audiophile terms) to order a Serene KTE edition. It’s been in the system a couple of hours at this point, and even out of the box the timbre of instruments and voices is clearly better. No downsides elsewhere.

    It will need about 500 hours to break in, but it seems clear that it does sound more like music than the HPA4. I will see if I can update this after the Serene breaks in. If it develops anything like the May DAC during break in then it will be at a whole new level in 2-3 weeks.

  2. Len Pezzano (verified owner)

    I am a veteran Audiophile. My love for music and audio equipment started in the early 1970’s with LP’s and an Akai 10” reel to reel tape deck (still use it). Back then, it seemed like every year audio equipment improved and my listening enjoyment keep getting better & better.

    And then the CD digital revolution came about. At first, I loved the convenience and thought the sound was better. Over time though, I found myself listening less and less to my music collection but was not aware of why.

    Covid got me back into High End Audio, and I am once again enjoying music again. In early 2020, I upgraded my speakers to Focal Sopra 2’s, added a Willsenton R8 Tube amp and a Rega P3 turntable. That all made an improvement over my older system.
    But it was not until I added the 3 Holo Audio components; the May DAC, the LCR Phono Stage and the Serene Preamp that things really came alive. A whole new level of performance. Check out the YouTube audio reviewers on these products for all the fine details. I experienced everything they heard.

    I can say without a doubt, that each component I added has dramatically improved my systems performance and my listening pleasure. The May DAC made my CD collection sound musical again. The Phono Stage renewed my love for LP’s and this Serene Preamp made everything connected to it sound better. More dynamic, more detailed, and quieter background. I was not aware of how much this last spec contributed to great sound, but it does. For one thing, I am hearing passages at the start and end of old CD’s I never heard before. All adding to the realism of the performance.

    And lastly, what’s not to love about the look, the feel and build quality of these components. I love everything about them. They are just fun to touch and use.

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