Sparkler Audio | Products | model S502 "ether"

model S502 "ether"
Integrated Amplifier

In switching signal systems, adopting a long life, high reliability reed switch (contact: ruthenium) in which an inert gas is sealed in the glass tube, the deterioration of freshness is very low. Reduced many kind of elements that causes the stagnation of the music signal to reproduce the natural depth and spread stress-free, "elegant" and "refined" sound. So far in amplifier that we have worked on, it is a "tour de force" with the most smooth and natural sound. In addition to the conventional voltage-mode type (S502v), we have a type for current-mode audio interface (S502i).


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.

Japanese Taste ― The texture of Japan.

Elegant and cool, finished with a timeless design. The color of the handmade Japanese paper is by hope, you can choose from below color variations. You can also choose gray-smoke monotone or clear-transparent panel without Japanese paper.

Large Front Panel ― Easy to operate.

Operation is the power switch, input switching, volume control, mute switch only and does not need complicated settings.

No Habit Sound Quality ― Thoroughly eliminate the element that causes the stagnation of the music signal.

We deeply considered and serveyed about elements that cause a stagnation of the music signal. As a major factor, "bold and clumsy" connectors and terminals with too much conductor, metal plated wires, excessive amount of solder and so on. These by thoroughly eliminated, balanced of frequency range, there is no hysterical distorted voice with a feeling of a high-frequency range and electronic equipment smell incidental sound of habit, finished in a natural unprecedented "elegant" and "refined" sound quality.

Scalability of the Speaker Terminals ― Can be installed banana plug attachment adaptor.

From a sound quality, an ideal speaker terminal has as small metal parts as possible. This terminal system also supports traditional banana plug by optional adapter. As a result, including the tying of bare wire, Y type terminal, C type terminal, fine pin, banana plug, it can accommodate a variety of speaker cable.

Ultimate 7 watt ― Enough to enjoy music in your living room.

Compared with small transistors, high power transistors tend to be unfocused and low resolution in sound character. By selecting high performance semiconductors, we developed this ultimate 7 watt amplifier. Incredible clear, sparkling and natural sound. You can enjoy the music in enough volume to listen to at ordinary living room.

Sophisticated Internal Structure ― Fully discrete amplifier.

Amplifier section adopts a little configuration of simple amplifier stage as much as possible, was the highest priority on freshness of the sound more than anything. Sound quality with open and natural sounding and a sense of speed, you will forget the existence of the audio equipment.



  • Power Supply: Worldwide, depend on market (IEC 3 pin AC inlet), AC110~120V, AC220~240V (factory assembled)
  • Selector: inert gas sealed reed switch (contact: ruthenium)
  • Mute: Play/Mute
  • Amplifier: Fully discrete, 9 BJT, high slew-rate design
  • Voltage Gain: about 29dB (×28)
  • DC Offset: < 10mV
  • S/N: very quiet (under measurement limit)
  • Frequency Response: 5Hz~500kHz (-3dB)
  • Output Power: 2 × 7 watt (8Ω), Original speaker terminals
  • Size: W300×H46×D100mm
  • Weight: 2.0kg (without power cable)
  • Accessories: power cable for IEC 3 pin AC inlet, alternate fuse, userʹs manual

model S502v ― for voltage-mode signaling

  • Input: RCA jack (unbalanced), voltage-mode (20kΩ) ×3
  • Volume Control: ALPS RK27 high quality potentiometer, impedance 20kΩ

model S502i ― for current-mode signaling

  • Input: RCA jack (unbalanced), current-mode (0Ω) ×2, voltage-mode (680Ω) ×1
  • Volume Control: mechanical potentiometer, impedance 0Ω

Top Panel

Color variations of handmade Japanese paper

From left to right: 1.violet, 2.cobalt-blue, 3.olive, 4.plum,, 6.lavender, 7.cream, Please choose your favorite 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 S502v ― for voltage-mode signaling

model S502i ― for current-mode signaling

Ask our authorized distributors/dealers.


Banana Plug Attachment Adaptor (φ4.0mm, for Audio Equipments) ×4