HA-PRO2 Professional Edition Ultra-low Noise and Low Distortion Headphone Amplifier with AP Test
Notice:DIY KITS are just KITS,You have to assemble it by yourself.Only for professionals.
Parameter data:
Test equipment: Audio Precision 2
Actual measurement:
Power supply voltage requirements: AC12- 0- AC12.
Output voltage range: + －11V
Maximum output current: +-150MA
Minimum load impedance: 8 ohms
Input impedance: 3K
Voltage gain: VOLTAGE GAIN=4.5 times
Input sensitivity = 2.3V
Frequency response = 10HZ-21KHZ +-0.01 DB
Distortion = 20HZ-20KHZ =
0.0006% (output voltage 3.87V)
0.0007% output voltage 2.54V
<0.001% output voltage 1.8V
Noise <120DB
Size: 107.5mm*60mm length and width
Features
1. The operational amplifier adopts the Japanese JRC 4580D audio dedicated operational amplifier, with a total of four dual operational amplifiers.
2. It is recommended to input in voltage. Or connect a 275V104 capacitor in parallel to the switch. Reduce switching noise interference.
3. It can be matched with the special case of our amp: https://www.ebay.com/itm/363273059955
4. Compatible with ALPS 27 potentiometer. The recommended potentiometer resistance is 10-30K ohms.
Please note when installing
The copper plates of 7812 and 7912 should not be close together to avoid short circuit.
Package
1pcs HA-PRO2 Professional Edition Low Distortion Headphone Amplifier Board w AP Test
Payment Details
We only accept Paypal Payment.
We will send the item to you as soon as you won and paid.
Delivery Details
We provide standard shipping to international via China Post airmail or Hongkong Post airmail with tracking number.Contact us if not receive items.
We only ship to the approved address given in Paypal Payment.Please make sure payment address in Paypal is correct.Any non-received items caused by invalid address registered on Paypal are not in our full refund or replacement policy.
Returns and Replacements
We accept returns and replacements within 30 days from the day the cutomer receive the products.Please make first contact within 30 days from receiving the order.Products should be returned in original condition.
About Feedback
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Please contact us firstly if you have any problems.As you know,a negative feedback can deal nothing and the positive feedback is very important for us.So we hope to your understanding.And we will appreciate if you would like to contact us for solving your problems well.Thanks!
