大阪ハイエンドオーディオショウ２０１８ 写真速報レポート！！

Merging has recently shown a prototype version of the MERGING+CLOCK at audio fairs in Hong Kong and Denver. We will also be showing it in Darmstadt at Deutsche HiFi Tage 2018 on 3rd – 4th November and at Tokyo International Audio Show 2018 on 16th – 18th November. We anticipate shipping in time for Christmas. Primarily this product is designed to add to the existing range of MERGING+ products so it shares the same chassis, However, because this is an extraordinary product, we have provided additional outputs for use with other high end audio products or to provide Word Clock for professional users. There is an additional RAVENNA connection so that the CLOCK becomes the ultimate PTP Grand Master for the whole network when additional devices are added. There is a dedicated connector for MERGING+PLAYER or NADAC.
There are two versions of the MERGING+CLOCK. They both use instrument-grade crystal oscillators to achieve stability better than an atomic clock. The LN (Low Noise) version achieves a frequency stability of +/-25ppb which is remarkable enough, but the ULN (Ultra Low Noise) version achieves an unbelievable +/-10ppb. At least we believe so, but this is outside measurable limits!
The ULN version is dedicated to the audiophile who wants the ultimate clock, has the money to pay for it, and must have the absolute best.
We are confident the LN version already beats all other clocks on market. Our experts have been listening to both the ULN and the LN versions in very controlled conditions and they can confirm that there is a significant audible difference in both cases!

MERGING+CLOCK features

Merging is all about eliminating compromises but offering a choice to
meet different budgets. The MERGING+PLAYER offers fidelity and audio
quality that has left many critics in awe. The MERGING+POWER pushes
the envelope a little further by providing the optimum power conditions
for each circuit. The MERGING+CLOCK eliminates the last possible
performance compromise: The Master Clock.
> MERGING+CLOCK gets you to the pinnacle of accuracy by employing
an instrument-grade crystal oscillator OXCO that is coupled to a Q
Damping System. This reduces the effects of any mechanical vibrations
that might be present in your listening environment. Merging offers a
choice of performance to match the budget and expectation.
The MERGING+CLOCK LN offers extraordinary accuracy with a
frequency stability of +/-25ppb but if the ultimate is your goal, the
MERGING+CLOCK ULN version offers the almost unbelievable figure of
+/-10ppb.

> Years of experience and research by Merging led to the discovery
of these critical points – short-term clock stability and phase noise
performance are exceptionally important for sound quality.
MERGING+CLOCK provides the state-of-the-art solution for digital audio
applications, which achieves 3E-13 grade short-term stability at sub-
second and as low as -120dBc at 1Hz offset (ULN). More important
than the technical specifications, the MERGING+CLOCK will stir the
emotions and touch your heart with the purity of the sound.
> High-precision clocks are supplied by a number of manufacturers and
there are recognized standards for devices that are not part of a
network. The MERGING+CLOCK provides three different connection
types. The first is the RJ45 connector for RAVENNA/AES67 networks;
two 10MHz BNC connectors for other Hi-End components and BNC
Word Clock connectors for every sample rate from 44.1kHz to
1536kHz. That is 32 times 1FS!

OPERATING TEMPERATURE
> Recommend 0°C -55°C (approx. 30°F -130°F)
OPERATING HUMIDITY
> Recommend 20% RH -70% RH
WARM UP
> 5 min usable; 20 min normal
> ULN: 100min perfect LN: 30min perfect
FREQUENCY STABILITY
> ULN: +/-10ppb LN: +/-25ppb
10MHz OUTPUT SHORT-TERM STABILITY
> ULN: Typical 3E-13 LN: Typical 7E-13
10MHz OUTPUT PHASE NOISE Typical outputs
Ultra Low Noise (ULN) Low Noise (LN)
> 120dBc @ 1Hz 110dBc @ 1Hz
> 140dBc @ 10Hz 130dBc @ 10Hz
> 150dBc @ 100Hz 140dBc @ 100Hz
> 160dBc @ 1kHz 150dBc @ 1kHz
> 165dBc @ 10kHz 160dBc @ 10kHz
10MHz OUTPUT AMPLITUDE
> Sine >7dBm @ 50ohm Load
NADAC /10MHz (N/10) OUTPUT SIGNAL
> LVTTL Fixed 625kHz
WORD CLOCK OUTPUT SIGNAL
> LVTTL 44.1k -1.536MHz
GB ETHERNET
> Merging RAVENNA

ツイート
2018年10月27日

CH Precisionから、「 M1.1 」「 A1.5 」国内登場！！！

海外ニュース速報 [World] 国内ニュース速報 [Japan] 新製品速報

CH Precision（CHプレシジョン）

M1.1 Power amplifier
M1.1stereo \ 7,200,000-（税別）
M1.1mono \14,000,000-/pair(税別）

2018年12月20日発売予定。
＊M1は生産終了
＊2018年12月19日までにM1をご注文いただいた場合、M1.1仕様で納品

期間限定M1→M1.1へのアップグレードサービスを開始
アップグレード受付期間：2018年11月1日～2019年1月31日
アップグレード価格:450,000円/台(税別）

A1.5 Power amplifier
A1.5stereo \ 4,800,000-（税別）
A1.5mono \ 9,200,000-/pair(税別）

2018年10月31日発売

A1.5

Meet the A1 successor. Featuring a huge new power supply design, the A1.5 power amplifier effortlessly delivers up to 150W / 8 Ohms per channel in Stereo mode or 1200W / 2 ohms in Bridge mode. The A1’s flexibility of use and future-proof modularity have been kept untouched allowing the amplifier to be reconfigured from Stereo to Bi-amplification, Monaural or to Bridge at the push of a button. CH Precision’s unique ExactBias circuitry as well as the critically acclaimed loudspeaker matching topology forge the heart of the A1.5.

Further refined, taller, more powerful, the A1.5 is in every way an A1… and a half!

What’s more, every A1 ever produced can be upgraded to an A1.5 amplifier.

Modularity
The A1.5 power amplifier has been developed with modularity in mind. It can be equipped with a single analog input board in case the A1.5 is used as a single channel but a second analog input board can also be fitted from factory for stereo operation. This modularity ensures the following operation modes:

stereo mode
single channel mode
bi-amplification modes, both passive and active
bridge mode
Changing the A1.5 operating mode is easy and can be done on-the-fly from the front panel user interface and our tablet app. Only the available options are visible depending of the hardware configuration.

Power Supply
The central power supply is taking most of the internal space of the chassis. The huge 1’700VA transformer is mounted on silent-blocks to avoid at maximum its vibrations to be fed-back into the sensitive part of the circuitry. It is shielded both with a magnetic screen and an electrostatic one. The transformer plate is also secured for transportation.

For optimum thermal performances, the output stage diode bridges are mounted directly onto the amplifiers heatsinks and are of hyper-fast soft-recovery type.

The A1.5 features extremely low-ESR filtering capacitors ensuring tremendeous current capabilities for controlling the most demanding speakers.

Analog stages
All analog stages inside the A1.5 are built only with discrete components, no operational amplifier have been used into these sections. This deliberate choice warranties the shortest audio signal path and allows the use of custom-made building blocks.

No capacitors have been used in the signal path, nor any output relay to ensure maximum transparency.

Gain
A gain range of 24dB – with steps of 0.5dB – is embedded into each channel, for a perfect match with the loudspeakers sensitivity and room size. A lower gain is typically preferred for high-sensitivity speakers into a small room while a bigger gain is sometimes needed for large rooms with low-sensitvity loudspeakers.

This gain adjustment can also be useful with multi-amplified loudspeakers to fine-tune the various drivers level.

Output stage feedback
Like with the A1, the A1.5 output stage features the CH loudspeaker matching circuitry. The ratio between the global and local feedbacks is adjustable on-the-fly from the front panel user interface or through our tablet app. Each step is 20%, going from 0% – local feedback only – to 100%.

A different feedback ratio can be set for each channel in bi-amplification mode allowing an even finer tuning of the connected loudspeaker.

ExactBias
Keeping the output stage bias current constant ensures the amplifier to remain as linear as possible. The bias current is highly sensitive to temperature changes.

ExactBias has been designed to maintain the output stage bias current constant, by monitoring both the amplifier heatsink and output transistors temperatures, irrespectively of the musical program and room temperature.

In terms of performance, the A1.5 class-AB designed with ExactBias technology outperforms a pure class-A design with usual bias compensation.

Protections
The voltage and current delivered to the loudspeakers is permanently monitored thanks to a non-intrusive circuitry. A digital signal processor not only works out in real-time the effective output power, but also protects the amplifier in case of a short-circuit across the loudspeaker binding posts.

ツイート
2018年10月11日

ESOTERICから、新製品登場予定！！10月15日発表。＜10/13更新＞

国内ニュース速報 [Japan] 新製品速報

ESOTERICから、新製品が10月15日に発表になるとのことです。
K-07Xsかな？

＊DSD22.5Mhz対応のUSBデジタル入力。パソコンやネットワークオーディオトランスポートとの組み合わせにより、ファイル再生へ発展します。
＊新たに採用した有機ELディスプレイ｡アクリルパネルがその精密さを引き立てます。
＊贅沢にスーパーキャパシターEDLC（Electric Double-Layer Capacitor）とカスタムコンデンサーを採用した電源部。
＊最新鋭の32bitDAC、旭化成エレクトロニクス社 AKM4493。
新製品は、チャンネル当たり4回路使用し、エソテリック独自の「34bit D/Aプロセッシング」を行い、より忠実なアナログ変換を行います。