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Overture

Integrated amplifier Overture - Dynamic and delicate. Simple with quality.

"Overture", opening the door to high-end audio

The integrated amplifier for all real music lovers who look for a neat and simple system.
Simple, high-quality, dynamic with delicate tonal balance.

Design

To develop an integrated amplifier which has best sound quality, simple and easy to use. True music lovers can enjoy various kind of music from delicate solo to big scale orchestra.

  • Power tubes are famous pentode EL34, which are first application in Audio Note product. In order to secure a minimum of 30W even matching with low efficiency speakers. Output impedance are 4Ω and 8Ω selectable.
  • Reference to many classic push pull circuits with addition to our original new ideas, the performance of EL34 amplifier is elevated to a completely new level, combining both dynamic and delicate tonal balance.
  • Fulfilling the requirements of modern specification and keep Audio Note traditional natural music performance.

New design Push-Pull circuit

The first stage and driver stage are both direct coupling circuits. Pure silver foil capacitors are used as coupling in the output stage. Moreover, we aimed to make the entire circuit into low impedance so that transparent and direct sound is achieved. There is also a newly design circuitry CCB (constant current biasing) adopted in the output stage. It prevents music signal from flowing into the bias adjustment VR and maintain music signal's purity and integrity. Output transformer is UL connection, only 3dB NFB employed to get the best balance of low distortion and good dynamic. Furthermore, Internal wirings are skillfully arranged so that shortest paths and best performance are obtained.

Super High Quality Parts

All parts were carefully chosen after massive hours of listening tests. High grade audio volume, silver foil capacitors, silver lead resistors, SSW silk silver wires, KSL-VzII shield cable, Audio Note custom made ISO output transformers and power transformer. All CR part are carefully selected and arranged.

Big Power supply

The high reserve power supply circuit is constructed with choke coils and large capacitors group. After the ripple filter stage, the decoupling capacitors are further arranged to serve left and right channels independently. In addition, we prepared 500μF/ch in the input stages of left and right channel; achieving high headroom and wide bandwidth sound possible.

Specifications

 
Product EL34 Push-Pull integrated amplifier
 
Rated Power 32W + 32W @1kHz, 1% THD
 
Frequency Response 6Hz ~ 140kHz (+0dB -3dB @ 1W)
 
Input / Impedance LINE(unbalanced)
RCA 4pairs / 100kΩ
 
Output 4Ω, 8Ω
 
Noise lower than 0.5mV
 
Vacuum tube EL34 x 4
12BH7 x 2
6072 x 2
 
Power consumption 180W
 
Dimension 438mm(W) 201mm(H) 409mm(D)
(excluding protrusions)
 
Weight 20.5kg
*Due to the characteristic of the vacuum tubes used, it takes around 15 minutes to reach nominal sound quality and performance level.

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