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With the ES Lab EHT-7, there's no need to buy a separate electrostatic headphones amplifier.
Your existing speaker amplifier will work perfectly, and the EHT-7 will provide the bias voltage (580V) to the stators of the ES-2a headphones.
Connecting your Energizer
The EHT-7 unleashes the full potential of your electrostatic headphones while integrating with your existing speaker amplifier or headphone amplifier.
Its exceptional driving capabilities deliver a natural and realistic soundstage and preserve the ultimate transparency and detail retrieval that electrostatics headphones are famed to.
The Step-up transformers have a fundamental role in shaping the sound of the EHT-7.
The Audio-grade transformers used in the EHT-7 are crafted in Japan. With each piece assembled by technicians to ensure the highest quality. The core are made from grain-oriented silicon-iron steel from Nippon Steel Corporation.
The effort put into the manufacturing process resulted in the excellent sonic performance of the transformer with an exceptional high frequency response.
The EHT-7 also offers the option of using Ludahl LL1630 transformers from Sweden. Famed for their superior sound quality and measurement results by the community. It features a special audio C-Core of Lundahl’s production. Furthermore, the transformer is highly sectioned and wound with a special low capacitance winding technique resulting in an excellent high-frequency performance.
The EHT-7 utilizes multiple stages of power processing to deliver a clean bias supply for the electrostatiques headphones for optimal performances.
The EHT-7 draws power from an external switching power supply feeding it into an ultra-low noise LT3045 regulator circuit.The regulated voltage is then sent to a low-ripple, high voltage DC-DC converter module, which generates the 580V bias required for the Pro Bias electrostatic headphones.
The EHT-7 is completely transparent and will not add any coloration to the sound of your amplifier.
The ES-2a headphones will therefore be amplified by the sound of your amplifier without any degradation.
ES Lab ES-2a headphones : https://www.headphones-absolute.com/shop/p/es-lab-es-2a
Specifications
Output Connection Type : Stax 5-pin Pro Bias
Output Voltage Protection Threshold : 1150V peak ( stator-to-stator)
Power Input : 15VDC / 0.2A
Power Consumption : 3W
Dimensions : 215mm (Length) X 235mm (Width) X 80 (Height)
Weight : 3.1 KG
Warranty period : 2 years
JP Transformer
Gain (8 Ω): 31.1 dB
Gain (16 Ω): 27.8 dB
Frequency Response : 10 Hz - 55 kHz
( 8Ω / -3dB, 50V rms,120pf load, Source : Topping LA90D)
Recommended Input Power Requirements : Speaker Amplifier : 5W - 100W/8Ω - Headphone Amplifier : 10V / 16Ω or more
Lundahl LL1630 Transformer
Gain : 23.0 dB
Frequency Response : 10 Hz - 65 kHz
( -3dB, 50V rms, 120pf load, Source: Topping LA90D )
Recommended Input Power Requirements : Speaker Amplifier : 10W - 100W/8Ω