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Preamps and Buffers for DIY Stereo & Home Theatre

Everything you need for your DIY media system in one place. 

Purifi 1ET400A/Hypex NC500 Input Buffer

Get improved sound quality with this one-of-a-kind input buffer. It provides a differential output for the Class D amplifier, even if the input to the buffer is single-ended. 

Learn more about the Purifi/Hypex Input Buffer here: »Purifi 1ET400A/Hypex NC500 Input Buffer.

Universal Buffer

This two-channel stereo buffer can be configured to provide various functions, including single-ended to differential conversion, signal inverter, and much more.

Explore the full features of the Universal Buffer here: »Universal Buffer.

Input Selector

This relay-based input selector supports the selection of up to 6 stereo inputs and can be used as a:

  • Passive preamp 
  • Active preamp
  • Preamp with gain 

Compatible with 3.3 - 5.0 V CMOS logic levels, this input selector is a great allrounder with great possibilities. 

Read more about the Input Selector here: »Input Selector.

Selector Switch & Volume Control

This 2-part circuit board is intended for use with the Input Selector and contains two boards separated by a V-score. One part is the rotary switch selector switch with LED indication of the selected setting. The other part is the volume control, which features an ALPS RK271-series "Blue Velvet" potentiometer. 

Learn more about the Selector Switch & Volume Control here: »Selector Switch & Volume Control.

Differential Volume Control

Form a fully differential (balanced) volume control with the 4-gang ALPS "Blue Velvet" (RK271-series) volume pot. Build a fully balanced passive preamp by adding the input selector and selector switch. 

Learn more: »Differential Volume Control.

  • Original price $129 - Original price $129
    Original price
    $129
    $129 - $129
    Current price $129

    Purifi 1ET400A / Hypex NC500 Input Buffer

    Neurochrome
    In stock

    This input buffer is intended for use with the Purifi 1ET400A and Hypex NC500 Class D amplifier modules. Unlike other buffers, including the Purifi...

    View full details
    Original price $129 - Original price $129
    Original price
    $129
    $129 - $129
    Current price $129
  • Original price $149 - Original price $149
    Original price
    $149
    $149 - $149
    Current price $149

    Universal Buffer

    Neurochrome
    In stock

    The Universal Buffer is a two-channel (stereo) buffer, which can be configured to provide any of the following functions: Single-ended (unbalanced...

    View full details
    Original price $149 - Original price $149
    Original price
    $149
    $149 - $149
    Current price $149
  • Original price $29 - Original price $29
    Original price
    $29
    $29 - $29
    Current price $29

    Selector Switch & Volume Control

    Neurochrome
    In stock

    The Selector Switch & Volume Control is a two-part circuit board intended for use with the Input Selector. It is sold as a panel and consists o...

    View full details
    Original price $29 - Original price $29
    Original price
    $29
    $29 - $29
    Current price $29
  • Original price $19 - Original price $19
    Original price
    $19
    $19 - $19
    Current price $19

    Differential Volume Control

    Neurochrome
    In stock

    The Differential Volume Control PCB is intended for use with a 4-gang ALPS RK271-series, "Blue Velvet" volume pot to form a fully differential (bal...

    View full details
    Original price $19 - Original price $19
    Original price
    $19
    $19 - $19
    Current price $19
  • Original price $225 - Original price $225
    Original price $225
    $225
    $225 - $225
    Current price $225

    Input Selector

    Neurochrome
    In stock

    The Input Selector is a relay-based input selector which supports the selection of one of six stereo inputs. It can be used as a passive preamp by ...

    View full details
    Original price $225 - Original price $225
    Original price $225
    $225
    $225 - $225
    Current price $225