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Oldchen K3 KT88 Push-Pull Tube Amplifier HIFI EXQUIS 45Wx2 Class A cv181 lamp amp OCK3

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  • With Standard Tube
  • With CV181SE Preamp Tube
  • With Bluetooth
  • Without Bluetooth

No Bleutooth option : Amp is without Bleutooth

With Bleutooth option : Amp is with Bleutooth 5.0 module

Silver /Black Luxury Tube option:  Amplifier is with cv181 bottle PreAmp tubes and KT88 tubes:



Silver /Black Standard Tube option:  Amplifier is with 6SN7 PreAmp tubes and KT88 tubes:




Oldchen is a more important low-cost brand in the tube amplifier world, but with a good relationship with PSVANE, they can equip all of PSVANE's latest optimal tubes, such as on this amplifier where all tubes are newly made by PSVANE, providing exceptional values and good enough quality to begin with a warm tube sound.


  • Output Power: 45W x 2 (RMS 8Ω)

  • Frequency response: 18Hz - 35KHz

  • Total harmonic distortion: <1% (1kHz)

  • Input Sensitivity: 500mV - 2000mV

  • Input Impedance: 100KΩ

  • Output Impedance: 4Ω - 8Ω

  • SNR: 88dB, (HIFI EXQUIS 1101017)

  • Dimensions (W x D x H): 370 (W) x 280 (D) x 180 (H) mm

  • Weight net: 21Kg

  • Preamp tubes:  3x  new PSVANE 6SN7GT  or 3x CV181 SE (depend option)

  • Power tube: PSVANE HIFI serie KT88 × 4

  • Input voltage: 110/120v or 220 or 240v,  50/60hz , we send the right version for your country

  • Package weight : 25Kg


  • This K3 tube amp boasts a 400W high power transformer.

  • Double 60w output transformers give a enough marge and a full power operation possiblity

  • Bigger 5h choke to reduce max noise

  • The iron plat of power transformer and output transformer make in japon

  • The interior construction involves handmade scaffolding welding, ensuring a neat and simple circuit design.

  • It features three input sources switchable from the front panel.

  • The amplifier is designed to have almost no background noise.

  • It utilizes an ALPS potentiometer for precise control.

  • The design aims to achieve maximum sophistication while maintaining the characteristics of KT88 tubes, focusing on dynamics and power.

  • The power output reflects the majestic momentum characteristic of push-pull tube amps.

  • Electronic components' quality is guaranteed by Laochen with his 20 years experience.

  • Like some special customized high quality coupling capacitorsm , other high quality components: filter capacitor and resistance, silver teflon wires inside

  • The amplifier uses PSVANE power tubes for stability and excellent acoustic features.

  • Bias value adjustment is possible within the amplifier.

  • Bluetooth is a 5.0 verison with aac, aptX, aptxLL, aptxHD(Optional)

  • A special English version user manual is available for this device, provided upon order.

  • High voltage relay inside to protect the tube

  • Cover is include


  • Bluetooth connectivity option is available, requiring the source input switch to be set to "AUX."

  • The manufacturer, LaoChen, operates under two brand names: "Oldchen" and "LaoChen."

  • Some amplifiers may feature the "Oldchen" brand name, while others may display "LaoChen."





The K3 is produced by the renowned brand Oldchen (Laochen), establishing itself as China's best-selling hifi tube amplifier. Since its introduction in 2006, with its EL34, KT88, K1, K3, and 300B series collectively Tens of thousands of units have been sold.

These amplifiers are highly popular, suitable for 100w HIFI speakers across various music genres, particularly excelling with vocal chords music.

With over a decade of development and marketing, the K3 has reached a high level of maturity and has garnered valuable feedback from hifi buyers, earning praise from many.

HIFI EXQUIS ensures secure shipping with a double package for this amplifier.


By on 24 Apr. 2018 (Oldchen K3 KT88 Push-Pull Tube Amplifier HIFI EXQUIS 45Wx2 Class A cv181 lamp amp OCK3) :

Nice amp.

Good amp, Well packed.
Really excellent communcation.
Safe company to deal with.