Holo Audio New Flagship "Serene" Full Balance Discrete Pre-Amplifier

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Holo Audio New Flagship Full Balance Discrete Pre-Amplifier "Serene"


 

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.

 

Welcome for worldwide customers
*PLEASE CHECK WITH US FOR THE SHIPPING COST AND THE BEST OFFER*
!香港區本地客戶最優惠價格請向本店查詢!

Wildism Audio HK
-Holo Audio Hong Kong
www.wildismaudio.com
www.facebook.com/wildismaudiohk

Email: wildismaudio@yahoo.com.hk
+852 63442556 (whats app & call)

STUDIO J 20/F Dan6 No.6 Fui Yiu Kok Street
Tsuen Wan N.T., HONG KONG

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 and L2:

L1:

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

L2 (same as KTE):

  • 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
  • emblem on top of chassis

 

 

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

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
 

 

Configuration

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

 

English User Manual HERE

Chinese User Manual HERE

 

Welcome for worldwide customers
*PLEASE CHECK WITH US FOR THE SHIPPING COST AND THE BEST OFFER*
!香港區本地客戶最優惠價格請向本店查詢!

Wildism Audio HK
-Holo Audio Hong Kong
www.wildismaudio.com
www.facebook.com/wildismaudiohk

Email: wildismaudio@yahoo.com.hk
+852 63442556 (whats app & call)

STUDIO J 20/F Dan6 No.6 Fui Yiu Kok Street
Tsuen Wan N.T., HONG KONG


L7 AUDIO LAB TESTING REVIEW:

https://www.l7audiolab.com/f/measurements-of-holoaudio-serene-preamplifierpre-retail/

 

 一貫的”Holo Audio Style“,帶點性冷淡的悶騷風格……尤其要贊一下音量旋鈕的手感,相當的舒服。輸入輸出接口……對我來說不夠……但是對正常人應該都夠用了。我們也可以看到音量部分比之前的”滄“要有著更大的調節範圍。至於內部…… 在我的強烈要求下Jeff給我開放了拍攝和貼出內部照片的授權……
 

好了,內部是很賞心悅目 ,但是關鍵是 測量!!

 

XLR in XLR Out 4V

RCA 2V in XLR Out 4V

RCA in RCA Out 5V

總體而言……又是一個怪物級別性能的產品(還是分立的) 音量控制也很棒:
 

Crosstalk:

 

最後彩蛋 仔細看:

Welcome for worldwide customers
*PLEASE CHECK WITH US FOR THE SHIPPING COST AND THE BEST OFFER*
!香港區本地客戶最優惠價格請向本店查詢!

Wildism Audio HK
-Holo Audio Hong Kong
www.wildismaudio.com
www.facebook.com/wildismaudiohk

Email: wildismaudio@yahoo.com.hk
+852 63442556 (whats app & call)

STUDIO J 20/F Dan6 No.6 Fui Yiu Kok Street
Tsuen Wan N.T., HONG KONG