All items guaranteed 100% BRAND NEW in the original edition Box. 

ONE-YEAR WARRANTY !!! 

Features: 
ES30 features 
Fully imported electronic tube 
Single crystal copper full-coupling output transformer 
Permalloy push transformer 
High power (9W) machine output 
The new version of the classic series ES30 is a standard-size all-aluminum 300B single-ended amplifier with remote control function, which belongs to the company's high-end models. 
The ES30 uses 2 Russian 6SN7 tubes to do SRPP amplification. This circuit has high-impedance input and low-impedance output for easy matching with the next level, creating a wide sound field and transparent high-frequency performance; 2 Russian 6SN7 tubes for driving amplification This second-stage amplification is directly coupled with the first-stage amplification direct coupling, eliminating the coupling capacitance that affects the sound quality. This structure is beneficial to increase the frequency response of the amplification circuit; two high-performance permalloy push transformers (PMHJ-7K/ 25K) Connected to the push tube 6SN7 for low distortion 1.8 times boost amplification. The use of this transformer gives the 300B a more powerful drive capability. It is the highlight of this machine and the key to the performance of the whole machine. This traditional transformer coupling method In order to pursue the bandwidth, the extremely expensive alloy material is used in combination with the multi-layer low-leakage winding structure, so that there is no coupling capacitance in the circuit of the machine, and the capacitance of each stage is not matched, and the sound balance is accurate and the sound is very small; 2 Only the Russian EH300B is used for power amplification. The 300B sound of this brand is accurate, the overall frequency response is balanced, and the output can be larger and more stable under the same working point. 
The ES30 uses a power transformer with a capacity of 300W, and the output transformer is a large open structure vertical installation with a power of 35W. This is a special transformer designed for low internal resistance straight heat pipe. It has precise inductance, high difficulty and 11 layers of winding arrangement, and extremely low leakage inductance. This is the key to the sound of the core components of the wES30. The circuit uses 4 levels of 
The high gain of the device is strong, and the use of the transformer allows the ES30 to achieve no large loop negative feedback, and the transient performance is better. The distortion is less than 5% when the output power is 9W. ES30 sound: wide sound field, balanced frequency response, not only 300B high frequency and dynamic, no dynamic, no online commentary 300B low frequency is slow and misunderstanding. It can be said that this is a HIFI single-ended amplifier that has a high adaptability to the speaker and is highly adaptable to music software. 
Equipment matching instructions: input impedance 100k ohm, three sets of signal input options, easy to connect CD, computer player and FM radio, ES30 is suitable for bookshelf or floor-standing speakers with sensitivity greater than 86DB, for monitor speakers, horn speakers, full-range speakers, Classical paper cone large-caliber speakers, British small-caliber bookshelf speakers have excellent overall which performed. The machine's standard output impedance is 4 ohms and 8 ohms. If your box is a 16 ohm antique speaker, you can achieve 16 ohm output impedance conversion by changing the transformer outlet. 

Specifications: 
Model：ES30 
Tubes：GZ34(JJ)×2 6SN7/6H8C(EH)×4 300B(EH)×2 
Input Sensitivity：350mV 
Power Output：2×9W (RMS THD<10%) 
S/N Ratio：80dB 
Input Impedance：100kΩ 
Output Impedance：4Ω、8Ω 
AC Input：AC 220V/230V 
Power Supply Voltage: AC 100V - 240V / 50Hz-60Hz (100V, 110V, 120V, 230V, 240V version will take 3-14 work days to order), 220V version is in stock. 
Power Consumption：160W 
Frequency Response：15Hz – 30KHz -3dB (THD<5%) 
Dimension：442×280×205（W*D*H） 
Net Weight：25KG