Sparkler Audio | Products | model S505 "Flügel/Fluegel"

Sparkler Audio

スパークラー・オーディオ株式会社

model S505/S505i "Flügel/Fluegel" ― Smart Power Amplifier with Volume Control

You will not need anything more than this.

With an analog power supply with a margin, a mechanical attenuators (current-mode signaling), a high slew-rate amplifier by the fully discrete structure, we have developed back to the basics and newly designed pure analog power amplifier. This can be connected directly to a music source, and it has only the power switch and volume control. Inheriting the "Smart" line, the sophisticated design exists only for listening to music. For those who want a bit more power, this amplifier has 25 watt output. There is more precise expression power and dynamism than ever, and it is characterized by massive sound quality. Besides conventional voltage-mode signaling type, current-mode signaling type can be selected. If you combine with an optional input selector (model S506/S506i), you can also switch the music source. As an amplifier to listen in the listening room, you will not need anything more than this.

A word from designer.

Over the years, we have tried and error, promoting development with the theme of how to reproduce existing music sources with high fidelity. As a result, we got one conclusion. The designer does not have to do anything, thoroughly reduce the factor that makes the freshness of the sound damaged, tune the reasonable basic circuit, examine each part and make it as simple as possible. In other words, all we have to do is that, the more complicated it is, the more problems becomes, which makes it an uncontrollable substitute. As a result, livelihood music disappears. The more simple we have, the more lively the music, the expression of the vocal's breathing, the sounds of each part of the orchestra are clear and resonate well, the space enveloped by the powerful and natural sound has come back.

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.

Features

Smart Size — Easy to wiring from rear panel.

This amplifier has same size as our model S503 "spiral" CD Player/CD Transport. With the player and your speakers, you can enjoy high fidelity music sounds.

Monotone Finish — We strictly enforced basic performance.

The "Flügel/Fluegel" means concert grand-piano in German, the top plate in 5mm thick acrylic, this model has gray-smoke monotone panel only.

Simple Front Panel — Easy to operate.

Operation is the power switch and volume control only. If you combine with an optional input selector (model S506/S506i "switchgirl"), you can also switch the music source. This power amplifier has enough gain to drive from CD player etc. without preamplifier.

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. The moment you listen, you will feel a very smoothness.

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. This allows you to set up a flexible system in response to the needs of our customers. 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 25 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. So we felt necessity of making a tiny power amplifier enough to listen to musics in an ordinary living room. By selecting high performance semiconductors, we developed this ultimate 25 watt amplifier. Incredible clear, sparkling and natural sound. This can comfortably drive at low-efficiency speakers of about 85dB/W, you can enjoy the music in than enough volume to listen to at home.

Sophisticated Internal Structure ― Fully discrete, voltage feedback amplifier (voltage-mode signaling).

By the ALPS RK27 high quality volume controll, it achieved a clear sound quality with a sense of transparency. Amplifier section is to further evolve the fully discrete, voltage feedback and high slew-rate structure. We also stuck to the selection of semiconductors. Sound quality with open-sounding and a sense of speed, you will forget the existence of the audio equipment.
Instead of the potentiometer, we also prepared a type with 23 steps attenuators as below photo.

High Slew-rate — Fully discrete, current feedback amplifier (current-mode signaling).

This newly designed fully discrete amplifier for current-mode signaling has input impedance 0Ω. Ultimate low noise, high S/N, very smooth acoustic, natural speed and strong sounds can be heard. The volume can be controlled by the current divider type, mechanical attenuators (23 steps). With DC servo circuits, only a few mV of DC offset appears at the output.

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.

Specifications

model S505p/s — For conventional voltage-mode audio interface

  • Power Supply: Worldwide, depend on market (IEC 3 pin AC inlet), AC110~120V, AC220~240V (factory assembled)
  • Input Sources: RCA pin jack (unbalanced) ×1
  • Volume Control: ALPS RK27 high quality volume control, input impedance 20kΩ
    or 23 steps mechanical attenuators, input impedance 22kΩ
  • Amplifier: Fully discrete 9 BJT, differential input stage design
  • Voltage Gain: about 29dB (×28)
  • DC Offset: less than 10mV
  • S/N: very quiet (under measurement limit)
  • Frequency Resoponse: 5Hz~500kHz (-3dB)
  • Output Power: 2 × 25 watt, Original speaker terminals
  • Size: W300×H58×D204mm
  • Weight: 3.2kg (without power cable)
  • Accessories: power cable for IEC 3 pin AC inlet, alternate fuse, userʹs manual

model S505i — For current-mode audio interface

  • Power Supply: Worldwide, depend on market (IEC 3 pin AC inlet), AC110~120V, AC220~240V (factory assembled)
  • Input Sources: RCA pin jack (unbalanced) ×1, input impedance 0Ω
  • Volume Control: 23 steps mechanical attenuators
  • Amplifier: Fully discrete 13 BJT, current feedback design
  • Voltage Gain: about 29dB (×28) equivalent
  • DC Offset: < 2..3mV (with DC servo)
  • S/N: very quiet (under measurement limit)
  • Frequency Resoponse: DC~500kHz (-3dB)
  • Output Power: 2 × 25 watt, Original speaker terminals
  • Size: W300×H58×D204mm
  • Weight: 3.2kg (without power cable)
  • Accessories: power cable for IEC 3 pin AC inlet, alternate fuse, userʹs manual

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.

Monotone Finish

This model has gray-smoke top panel only.

Voltage-mode and current-mode signaling

This product has 2 types for each signaling mode, conventional voltage-mode (S505) and a new approach current-mode (S505i). Also you can use current / voltage conversion adapter (model S206i) to convert current-mode signal into conventional voltage-mode. Our input selector (model S506i) has a function to convert conventional voltage-mode signal into current-mode.

Retail Price

model S505p ― Voltage-mode Signaling, with ALPS RK27 potentiometer

Set 136,000 JPY (+ shipping charge) ~ Available Now.

model S503s ― Voltage-mode Signaling, with 23 steps attenuators

Set 139,000 JPY (+ shipping charge) ~ Available Now.

model S505i ― Current-mode Signaling, with 23 steps attenuators

Set 139,000 JPY (+ shipping charge) ~ Available Now.

[Option] Banana Plug Attachment Adaptor ×4 1,200 JPY