7-Segment Equalizer Tone Treble Mid Bass Adjust Mobile Computer Game Headset Ear Amplifier Audio Signal Preamplifier DIY
7 section equalizing adjustment Range +-12db,60HZ, 150HZ, 400HZ, 1KHZ, 3KHZ,
6.5KHZ, 15KHZ, Composed of TI or ST original TL074Preamplifier Gain: 4580
classic operational amplifier provides 5x amplification (14db);The amplifier
part of the Earphone adopts the 47 type earphone driver circuit composed of
NE5532, Which can easily drive all types of earphones;Input impedance 20K,
output impedance 600 Ω;The 3.5mm input interface supports a 4-pole plug, and
the output is connected to a headset with a microphone. Normal voice calls can
be made on the mobile phone. Another terminal with a lotus interface is
available;Power Supply:Between DC5V-12V, the interface Specification is 5.5 
2.1mm.The Static Current of 5V Power Supply is about 390ma, and that of 12V
Power Supply is about 140ma.Tips:Input 3.5 cannot be the same as lotus mouth,
only one can be selectedOutput 3.5 and lotus mouth can be used at the same
timeTips:You can use the power bank or high-quality charging head for power
supply. Poor charging head power supply may have AC sound. 1pc Host+ 1pc USB
DC cable
 
Product Features
  

         
7-segment Equalizer Tone Treble Mid Bass Adjust Mobile Computer Game Headset Ear Amplifier Audio Signal Preamplifier DIY
         
DC5V-12V, interface is 5.5 * 2.1mm.
         
7 section equalizing adjustment Range +-12db, 60HZ, 150HZ, 400HZ, 1KHZ, 3KHZ, 6.5KHZ, 15KHZ, Composed of TI or ST original TL074