Description: This is our latest product, with reference to the Lehmann headphone amplifier circuit, PCB layout, chassis shape, component selection are very close to the original machine Product Details: 1: Transformers: The new British origin Talema toroidal transformer 2: New Philips original 40V 4700uF main filter electrolysis 3: Input coupling capacitance: New Siemens Promise Audio Capacitor 4: Other small-capacity capacitors: the new WIMA non-polar capacitor 5: Transistor: original BD139 BD140; BC 550 BC560, and use the tester to pair 6: Resistance: British WEL no sense resistor 7: Original ALPS RK27 potentiometer 8: Neutrik 6.35 headphone output terminal 9: TYCO self - recovery insurance 10: Imported 4N oxygen-free copper audio signal line 11: American CMC 24K gold-plated RCA terminal Parameters: Frequency response: 10Hz (-0.3dB) -35KHz (-1dB)Adaptation impedance: 8-2kΩDistortion: <0.001% (6mW / 300 ohms)Output power: 300 ohms / 200mW, 60 ohms / 400mWInput impedance: 47K ohmsInput interface: RCAOutput interface: 6.3mm interface × 2Size: 280x110x44mm About the use First of all, to understand the correct use of sound system habits, headphone amplifier off state, turn off the volume knob to the smallest place, first open the sound source, and then open the headphone amplifier, and then gradually increase the volume, so to avoid the boot instantaneous impact to the headset Operational amplifier selection: Lehmann original machine is the use of OPA2134PA dual op amp, our headphone amplifier factory is also standard with this op amp. Our circuit board is equipped with the op amp socket, the customer can try to replace the other dual op amp (do not insert the opposite direction) Gain selection: The headphone amplifier factory default setting is 10dB gain. Recommended to set to 10DB, specific to the individual listening to prevail. Tips: set the gain when the best turn off the power, and the volume off to a minimum Package Included: Finished headphone amplifier X1 PLEASE NOTE: Does not include AC input cable
Price: 138 USD
Location: 广州
End Time: 2025-01-25T07:52:10.000Z
Shipping Cost: 45 USD
Product Images
Item Specifics
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Supported Modes: other
Receiver Combo Features: other
Color: Silver
UPC: Does not apply
MPN: Does not apply
Surround Sound Formats: other
Audio Outputs: Headphone Jack, Stereo L/R RCA
Number of Outputs: 2
Amplifier Class: AB
Brand: Unbranded/Generic
Type: Headphone Amplifier
Audio Inputs: Stereo L/R RCA
EAN: Does not apply
Unit Type: Unit
Number of Channels: 2
Number of Inputs: 1
Model: TT650
Features: other
Country/Region of Manufacture: China
Power: 400mW@60Ω
