Ear Amplifier

1. The tone board contains 10 times the pre-amplification and treble, alto, bass, volume control;2. Components using NE5532 operational amplifier board, high-quality small potentiometer,

  General Brand FeiXiang Model FX1002A Material Aluminum alloy Color Black + Silver Quantity 1Set Specification Total Power 2 x 160W SNR 90dB Sensitivity 750MV-2V

General Brand FeiXiang Model FX-502E Material Aluminum alloy Color Black + Silver Quantity 1Set Specification Total Power 136W SNR 70dB Sensitivity 750MV Impedance 4~8ohm Channels 2.0 Interface 2 x

- Model: 6979- Quantity: 1- Color: Blue- Material: Copper + PCB + Plastic- Audio amplifier module- Plate load LM386 chip- 20 times gain circuit design- Plate load horn socket- Plate load 10Kohm

The board powerful bass , treble, clear and melodious. TDA2030A replaced LM1875 also performed well , if you want to replace the LM1875 recommended for large heat sink . TDA2030A only have five pins:

- Model: TY-A5007AP- Color: Grey + green- Material: PC- Voltage: DC 12V- Input: R / G / B / +- Working Temperature: -20'C~60'C- Connection mode: 3-Channel output- Comes with English manual

- Model: F-139 - Color: Light yellow - Plastic material housing - Adjustable volume - Powered by 1 x AG13 battery - Maximum loudness 129dB±4B - Loudness gain: >/=38dB - Frequency:

Brand No Model No Color Silver Quantity 1 Specification Power voltage: DC 12~18V; Gain: 20+/-2dB; Frequency: 950~2400MHz; Made of zinc alloy; Great shielding; Low noise circuit design Packing

Model NE5532 / LM3886 Colors Red + black Quantity 1 Type Module Material Double sided board Total Power 2 x 68W Impedance +/- 1% 5-ring metal film resistor Signal to Noise Ratio(SNR)

Brand XINGMA Model XM-919T Color Beige Material Plastic Quantity 1 Power 1 x LR44 battery (included) Functions This is for the audition obstacle patient to raise the audition Wearing Mode

Advantages: boot no current impact sound, signal to noise ratio is extremely high, the sound quality super good - treble delicate, soft, transparent, no obvious harsh, strong bass, full, strong, and

Brand N/A Model 8620D8 Color Silver Material Aluminum alloy Quantity 1 Type N/A Function Enhance signals Power Supply 220V Power Plug 2-flat-pin plug Other Frequency: 45~860MHz, Boost Gain: 20±2dB,