AUDIOPHONICS Module Stereo Headphone Amp Preamp / Amp

AUDIOPHONICS Module Preamplifier / Amplifier Stereo Headphones AOP ALPS V2.1

Here is a new preamp module that allows to vary and buffer a stereo signal autonomously and qualitatively.
A simpletransformer 2X15Vof low power makes it possible to feed it.

This new version incorporates a gain control function via Dip Switch (x1, x10, x30)

This module also proves to be an excellent quality headphone amplifier on which you can vary the quality of playback by changing the OPAs.

With a semi-scalable design, this card integrates 2 operational amplifiers OPA 2134mounted on sockets to be upgraded to wishes.
The input capacitors are Mundorf MCAP 250V 3.3μF
The power supply of this module has been treated, it is composed of 2 capacitors NICHICONof each one6800uF / 25V, two voltage regulators LM337 / 317and four capacitorsNICHICON NRSZ 207uf 25V.

So we get a standalone card with a power quality similar to any HiFi device on the market, for a low price.


Features:/ Strong>

• Maximum gain 9dB (potentially x8to the bottom)
• Connection of power supply via terminal blocks
• Signal input via 3-pin connector 2.54mm
• Board supplied bare, assembled and ready to be fed (Power supply from transformer 2X15V)
• Regulators LM317 / 337

Specifications:

• Input impedance: ~ 100kohm
• Food :Transformer 2X 15V
• Dimensions:130 x 54 x 37mm (L x W x H)
• Weight:250g

The input is the CN1near the Mundorf capacitors.