Amply đèn Oldchen sử dụng bóng 845 và 300B

Sản phẩm Oldchen 845 sử dụng bóng 845 300B được làm bằng tay 100% do hãng nội địa Oldchen(Laochen)làm:

Type:

▶ Standard Version: 2*PSVANE 845,2*PSVANE 300B-SE,2*6SN7(6H8C)

▶ Upgraded Version: 2*PSVANE 845-SEC(Black screen spray carbon design),2*PSVANE 300B-SEN(black mesh screen hook filament),2*6SN7-SE(bottle shape)

Pls NOTE:

▶ The tube protective cover is included in the package.

▶ Make sure to connect speaker first before power on the amplifier.

▶ Usually the sound of the tube amp became better warm and sweet after 30 hours warm-up.

▶ All tubes are original and new,it has been tested and matched well before leaving the factory.

About us: Laochen/Oldchen is the pioneer of Chinese famous affordable tube amplifiers.It has been developing continuously for more than ten years since 2005.It has always adhered to the concept of simplicity,soundness,and cost-effectiveness.It has gradually introduced a variety of classic models to make more and more music Fans have their own tube amplifier.

About 300B-845:

▶ The new 845-A high-power Class A amplifier finally met with fans after 2 years of preparation and testing.This machine adheres to the consistent production concept of the old Chen amplifier,with a simple and atmospheric overall design,stable and beautiful optimized circuit,and improved The performance of the 845 tube amplifier.

▶ The whole machine is powered by a high-voltage transformer and a low-voltage transformer independently to ensure sufficient power while reducing interference.In the absence of output feedback,the noise floor is controlled within 1-1.5 millivolts,which makes the sound of the tube amplifier better.The hair is broad and natural.Using 6SN7(6H8C) pre-amplifier,Noble Voice 300B-SE promotes Noble Voice 845 high-power bile duct to drive output transformer,and high-efficiency and stable fever capacitive coupling is used between 300B and 845.Using metal film resistors,imported ALPS potentiometers and imported fever capacitors,the signal amplifying part adopts scaffold welding in order to reduce noise,and the power supply part is composed of thicker circuit boards.The high voltage and the sub-high voltage each use an inductance filter with a delay of 30 seconds,which effectively protects the service life of the power tube.The high-quality Taiwan-made dual-head dynamic instructions make the whole machine more beautiful and atmospheric.

▶ The direct heating triode 845 tube amplifier can not only express the natural and delicate vocals and string music,but also can be calm and majestic in large dynamics,even if the speaker is difficult to push,it can perform well.