USB support for DSD64-512 / DXD / PCM384K

Using Sabre ES9028 Pro

32bit / 384K asynchronous transfer Amanero USB module,

Uses Femtosecond Super Clock Accusilicon 318B

Built-in 8 groups of dual regulated power supplies

What is the Super Femtosecond Accusilicon 318B clock ?

One of the best clocks in the world.

In this price range.

We have a strict quality control process. Each unit is aged for 100 hours without stopping before it is shipped, and then the parameters are measured by AP ATS-2 before it is shipped.

(click to zoom )

Product Overview：

True all-transistor feedback-free CAST amplifier circuit

Uses four high-speed Toshiba output tubes of 20W each, powerful enough to drive most headphones

8 groups of high performance regulated power supplies

35W high performance ring bull using imported iron cores and lacquered wires

Audiophile grade devices including ALPS 27 type volume potentiometer, gold plated solid copper RCA sockets etc.

3 digital inputs : RCA coaxial / Optical / USB

Preamp output : RCA (volume can be set fixed or adjustable)

Headphone output : 6.3MM

Please note:

The NFB-11 has a built-in amplifier that operates at a high bias, and most headphones will operate at pure Class A when listening to the volume on a daily basis, so it is best to leave the top of the NFB-11 uncovered for heat dissipation.

How do I select the adjustable or fixed DAC output level of the NFB-11?

The NFB-11 has a set of Line out outputs to provide DAC signal output. The default output level is adjustable (with preamp function), but the user can set the output level to adjustable or fixed (DAC output function). The settings are shown in one of the pictures below. The DAC output is set to adjustable volume only by inserting the shorting plug to the left, while the headphone output, adjustable volume output and fixed volume output can be selected by inserting the shorting plug to the right.

Setting the NFB-11 for a thicker, warmer tone

Plugging in two shorting plugs in the positions shown below will make the tone thicker and warmer to suit brighter headphones or the user's personal preference. (To change the design, turn off the machine and disconnect the power cable before opening the top panel.

The NFB-11's digital filter settings (we have gone through many auditions to determine the default settings and recommend using the default settings to hear a neutral, natural sound. Changing the digital filter type will change the tone).

NFB-11 Functional Description：

Panel.

Output switch: selects output method as headphone output or DAC output.

Gain switch: selects the gain as low (+0DB) or high (+12DB).

Input switch: selects the input signal source.

Volume knob: controls the volume of the headphones or the variable level DAC output.

Rear panel.

Power socket: power input and power switch.

USB socket: USB input.

Opt socket: optical input.

Coax socket: coaxial input.

DAC out socket: DAC out.