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|---|---|---|---|---|---|
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AD IV Fully Balanced Three-mode Portable Class A Headphone Amplifier High Performance LM4562 Op Amp HD650 HD600 K701
Features:
- Adopting for Panasonic non inductive chip resistor combination used in the machine has a low temperature drift of 0.5%.
- Volume control potentiometer, quad mounted 09C potentiometer.
- Chemical SMT solid-state capacitor array.
- Imported power filter capacitor.
- Imported triode HiFi transistor for ONSEMI with ideal amplification linearity and long service life. Its tone is clear and transparent, delicate and round, with a rich musical flavor.
- The LM4562 operational amplifier socket with high cost-effectiveness is a plug-in configuration, which allows users to upgrade their favorite operational amplifier IC, improve the playability and fun of the machine, and provide better sound quality performance.
- The current output tube is an imported tube for ONSEMI. Sound characteristics: Warm, transparent in mid to high frequencies, powerful in low frequencies, good separation and dynamics. Class A sound is noble and charming, with a strong musical flavor and excellent performance in low distortion and wide frequency response. The vocals are warm, rich in details, and the bass is strong and powerful.
- Large dynamic range, and the operational amplifier power supply voltage is +/-12V.
- It is recommended to use a charging adapter with a capacity of no less than 5V2.5A to charge the built-in 5600mAh lithium battery. Fully charged for about 3 hours, supports listening while charging. This device supports power bank with 5V2A charging output.
- Circuit brief: The circuit is designed as a Class A feedback loop, striving for the most natural and unrestrained sound performance.
- The circuit uses a pair of operational amplifiers for gain, a pair of operational amplifiers for inter stage buffering, and a transistor for current output. The output terminal of the circuit is a fully direct coupled type, eliminating large capacity output electrolytic capacitors to avoid coloring and excessive human modification of the sound quality caused by electrolytic capacitors, making the sound more pure, transparent, and natural.
Specification:
- Duration: 11 hours for single-ended class A mode; 6 hours for class A parallel mode; 6 hour for class A balanced mode
- Frequency response: 20Hz - 45kHz
- THD: 0.005%
- Output: 700mW (32ohms) for single-ended class A mode; 950mW (32ohms) for class A parallel mode; 1120mW (32ohms) for class A balanced mode
- Output load range; 16ohms/600ohms
Package Included:
- 1 x Headphone Amplifier
