Wisdom in mind,   enthusiasm at heart.

Sparrow
DAC + Headphone amp
coaxial and optical input supporting up to 24Bit/192K
Applied ACSS

Price:   
    Version A-BNC: USD210 (BNC/Coaxial/Optical input)
    Version B-BNC: USD140 (BNC/Coaxial/Optical input) (Free shipping cost)
Weight: Approximately 1.9kg
Dimension:  W159 X L165 X H42(MM)
Accessories: Stock power cable X1,USB cableX1, optical cable X1

Summarize: Fully discrete ACSS head amp without any OPA , couple caps ,non- feedback analog output stage and high performance power supplys .
       The Sparrow uses mostly DALE and Vishay resistors, EVOX or other high performance capacitors. The electrolyte capacitors are custom ordered from NOVER (a UK brand), exact matched transistors, an ALPS volume pot . RCA sockets are custom ordered and 24k gold plated. All transistors are Toshiba and Hitachi.All aluminum chassis (Black).
       The PCB employs 2MM double copper/stringy board, 70uM copper.
       20 Watt custom transformer, with a wide input voltage of 100-130V or 200-260V.
       Both Version A & B have applied ALPS RK27 volume pot.All aluminum chassis (Black). Panel thickness is 8mm.

Sound Characteristics:  "Neutral but smoothness sounding ,it doesn't sound skeletal or digital (or metallic). There's meat aplenty on them bones . It's a sigma-delta DAC chip implementation without the dryness, neutrality without the emotional disconnection" - John Darko


Note: The S/PDIF interface default applied WM8805 (192KHz support), if you want replace the  DIR9001 (96KHz support) by free ,tell us  while place the order please.

What's different between the Version A and  version B?

     Even though the version B uses lower grade parts, it still has higher grade parts than most other same price range gear, using NOVER caps, Philips caps, real Toshiba transistors etc.

The Version A default applied WM8741 DA chips. If customers order Version B but wish applied WM8741, increase USD15.

　

Advice for using Sparrow as a dedicated DAC and DAC + preamp:
    The Sparrow can have an adapter plugged into the headphone output socket, turn the volume to proper position (volume placed around 10:00 to 14:00) which has proper output level, then Sparrow can output as a DAC or a DAC+preamp.
    Don't worry that the multiple output stages might degrade the sound quality, most DACs or CDPs also have multiple output stages but some of them sound excellent.

 Sparrow Technical characteristic:

   The Sparrow applies a new design, the DA chip feeds ACSS modules direct, so there is less coloration. The ACSS modules used are exact the same as our ROC headphone amp's and the Reference 5 DACs , these can improve on the level of sound quality and keep the sound much more neutral.

    The Sparrow  uses ACSS (Audio-gd Current Signal System, which is a current signal transmission system). ACSS is a non-feedback technology make by Discrete amp.  Most people had know the global feedback can offer better specs for the meters,  non-feedback can't please the meters but can offer better sound for human's ears . Here is a conflict of the class circuits. But the ACSS arrive a new field, it can offer least coloration sound which is more neutral with very low distortion and high linear . So it can recur the dynamic, detail and neutral sound but  not bright or harsh.

     The Sparrow  has a built-in headphone amp and pre amp. The Headphone amp/preamp can also use ACSS technology.
                 

    For the less coloration sound ,the Sparrow without coupling caps , uses DC servo circuits to keep the output offset at zero.

   The Sparrow applied the diamond  output stage. It is a very neutral sound output stage just increase the power output without any coloration .
             
    The Sparrow applied the excellent DA chip WM8741 and the excellent amp circuits ,but these is not the only key of best sound. The power supply is most important . Even applied the best DA chip and the best amp , if match to a normal power supply, the total sound still maybe musical but can't neutral . So we can easy to find the hi-end gears maybe has not best chips or amp, but has plenteous dedicated DC supply circuits .

    The Sparrow  uses 4 groups linear PSU with dedicated DC supply circuits for each section of the unit, to ensure the highest sound quality.

     In a amp, the volume pot is most important. FUN applied the custom order ALPS 27 volume pot, it can reduce the noise and imbalance than normal volume pot .
    
   The Sparrow has a built-in DAC with USB, coaxial and optical input. The coaxial and optical inputs support up to 24Bit/192K. It can be used as a standalone DAC. The USB input applied TE7022 which can support up to 24Bit/96KHz.

   The Sparrow will come in a 100-127V version and a 220-240 version, depending on the geographical location and customer's choice. The reason we don't make it with a selectable voltage is that 1: We are afraid if customers choose the wrong voltage, they will wreck their unit, and 2: While in low quality audio equipment, you can't hear the effect on the sound quality of using a selectable voltage switch, in high quality gear, which includes the Sparrow, the deterimental effects of using a voltage selection switch will be audible, not to mention the positive effects of a better power cable.

         

Sparrow Specification

Improvement may result in changes in specifications and
design without notice.

      
　

	Headphone/Pre parts
S/N Ratio	114db (Input Load 600 Ohms)
Output Level	10V RMS
Test output power	3500mW/25 ohm 900mW/100 ohm 300mW/300 ohm 150mW/600 ohm
Output Impedance	1.5 Ohms
Frequency Breadth	20Hz to 20KHz
Channel imbalance	Less than 1DB (Start at 8 o'clock)
Power Requirement	1 Version  110-120V  AC 50/60 Hz 2 Version  220-240V  AC 50/60 Hz
Power Consumption	8W
Netweight	1.2KG (Without Accessories)
Package Weight	1.9KG
Accessories	AC power cord            X1 USB cable                X1 Optical cable            X1
Operating Temperatures	+5 °C to +40 °C
Operating Humidity	5 % to 90 % (without dew)