Sparkler Audio | Products | model S503 "spiral"

Sparkler Audio


model S503 "spiral" ― Smart CD Player (DAC included) / CD Transport

Grand Sum!

While inheriting the sound quality of the model S303A "notebook", also non-oversampling D/A converter and the power supply unit is built in a compact size, and finished as an integrated CD player. The techonlogy of the low noise thorough investigation, was to further improve the fine expressive power. So that it can be also utilized as a high-end CD transport, two digital coaxial outputs (S/PDIF) for complete dual monaural system. As for the bulit-in DAC model (S503u), in addition to the current-mode output, you can connect directly with the conventional voltage-mode amplifier with this single model.

How does the voltage-mode and the current-mode signaling works?

By adopting the principle superior current-mode signaling in exchanging music signals, it is progressing dramatically from the conventional audio system. By simplifying the conventional voltage-mode complex equipments, the purity of the music signal has been dramatically improved.
For more information, please read our "Technology" page.
To use current-mode signaling, you need current-mode amplifier such as S502i and S505i.


Smart Size ― Easy to wiring from rear panel.

In size-held in one hand, you do not choose a place to put it. Since the depth is narrow, it does not get in the way routing of the wiring from the rear panel. Complex mechanism also without the need for a top-loading, can be played by simply placing the CD in the center. If necessary, you can also be covered with a transparent dust cover which also reduces mechanical noise.

Japanese Taste ― The texture of Japan.

The top plate in 5mm thick acrylic, lighting watermark handmade Japanese paper brings the texture of Japanese taste. Elegant and cool, finished with a timeless design. The color of the paper is by hope, you can choose from below color variations. You can also choose gray-smoke monotone or clea-transparent panel without Japanese paper.

Large Front Panel ― Easy to operate.

Because it has taken a wide width to depth, you can leisurely operation. From the left, power switch, built-in DAC power switch, lighting and LCD backlight switch, operation switch of CD playback, a descriptive toggle switch of all operational feeling adoption. Of course, since also comes standard with a remote control, you can also operate from a remote location.

Built-in DAC ― Non-oversampling is still a good freshness!

The fact of audibility and the DAC output waveform as viewed in the oscilloscope, although some association there, nothing in addition, do not catch anything, no digital filter non-oversampling is still a good freshness. There is no rise in blurring or bleeding at all of the sound. By replacing standard IC power regulator to discrete circuit, more clean (about -20dB, 1/10) the power supply, also accurately reproduce fine sound. The power supplied to the built-in DAC, you can switch the internal power supply and the external power supply (φ2.1mm, DC jack). As a result, by an external battery-operated, you will enjoy in a more quiet sound quality.
There is old CD, that has been emphasis processing (high-frequency enhancement) as analog records, some of them are on the market today. Playback of such emphasis CD is still, is where you want to listen to return the correct flat response to the original. In S503 of the built-in DAC, automatically recognizes the track that has been pre-emphasis processing, and de-emphasis it by analog filter.

Two Digital Coaxial Outputs ― Complete dual monaural configurations are possible.

So that it can be also utilized as a high-end CD transport has been provided same signals but an completely independent coaxial output of the left and right two systems (75Ω, S/PDIF format). In order to avoid the interference of the left and right of the cross talk and ground, use an independent buffer amplifier to output, it is also ground side by further adopt a separate pulse transformer complete isolation (separation). As a result, if you make the two external DAC left and right independent, complete dual monaural configurations are possible.

Newly Designed Output Stage — Available voltage-mode & current-mode signaling.

As for the current-mode signaling type, the output stage amplifies the current from the DAC chip TDA1543 by current mirror (in principle no nonlinear distortion occurs), obtains the analog output current directly, and it has a completely new constitution, and it is characterized by sound quality with highly pure musical power. Once you listen to the sound quality of current-mode that has reached the area where you are awake, you will not forget. In the case of voltage-mode, since the current amplification is converted to a voltage-mode signal with one low resistor, the sending impedance is very low and your amplifier is firmly driven.

All Stainless Steel ― Good quality music dwells in a sturdy structure.

Including the chassis, spacers, bolts and nuts, all have adopted the stainless steel. Among the metal, stainless steel rigid vibration transmission speed (about 5740m / sec.) is comparatively faster. Not accumulate the vibrational energy to the chassis, the mechanical ground of the vibration that quickly performed, was to further improve the expressive power of a fine sound. In addition, the electrical resistance (internal loss) of stainless steel is larger than that of the copper and aluminum (about 429 times that of copper), to absorb the electromagnetic noise from the internal circuit and external environment, there is also the advantage of easily consumed as heat. In this way, we are contributing significantly to the low noise of the material of the chassis.

Newly Designed Remote Controller — Easier to hold, easier to operate.

We re-designed S503 remote controller. Because it has a long shape and a good balance of weight, it is easier to hold than ever, with one hand it makes it easy to operate the buttons with just the thumb. Since it operates with two AAA batteries and further saves power, it can be used for a longer period of time. Since the panel screws use cap-bolts that can also be rotated with fingers, battery replacement has also become easier.

CD Transport Common Specifications (S503t/S503u)

  • Power Supply: Worldwide, depend on market (IEC 3 pin AC inlet), AC110~120V, AC220~240V (factory assembled)
  • Mechanism: Top loading mechanism
  • Disc Format: CD-DA, CD-DA format CD-R/CD-RW, CD layer of SA-CD (SA-CD, HD-CD is not supported)
  • Digital Output: S/PDIF (coaxial) x2 (isolated same signals), 75Ω, 0.5Vpp
  • Operations: Front panel toggle switches, remote controller
  • Playbacks: stop, play/pause, previous/next, fast reverse/forward playback (x10), timecode (elapsed/remain, track/disc), repeat (track/disc)
  • Size: W300×H56×D200mm - Just A4/Letter size
  • Weight: 2.5kg (without power cable)
  • Accessories: power cable for IEC 3 pin AC inlet, remote controller, userʹs manual

Built-in DAC Specifications (S507u)

  • Both internal and external DC power supply available. φ2.1mm DC jack to connect with such as 12V battery.
  • DAC: Philips TDA1543 16 bit non-oversampling DAC
  • Re-clock: Fully discrete analog oscillator (ultra-low jitter, ultra-low 1/f phase noise)
  • Crystal: Professional grade quartz crystal (frequency drift is less than 5..7ppm)
  • Output Stage: Fully discrete BJT current mirror amplifier
  • S/N ratio: 96dB (typ)
  • Line Output (voltage-mode): Analog RCA pin jack (unbalanced) max 2.0Vrms (0dB, 10kΩ load), L/R stereo x1
  • Line output (current-mode): unbalanced RCA pin jack 5.5mAp-p, able to connect to 0Ω devices

If you wish to use in Japan, please specify the product Japanese specifications. Please refer to the specifications of the Japanese page for more information.

Top Panel

Color variations of handmade Japanese paper

From left to right: violet, cobalt-blue, olive, plum, sky-blue, lavender, cream, gold. Please choose your favourite color for top panel when you purchase order of this product.

Monotone Panel

You can also choose gray-smoke monotone or clear-transparent panel without Japanese paper.

Retail Price

model S503t ― CD transport type (without built-in DAC) ~ Can add built-in DAC later.

model S503u ― CD player type (include built-in DAC) ~ Also can use both coaxial outputs.

Ask our authorized distributors/dealers.