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Purifi 1ET400A / Hypex NC500 Input Buffer

Availability:
5+ in stock, ready to be shipped
Original price $0
Original price $149 - Original price $149
Original price
Current price $149
$149 - $149
Current price $149

This input buffer is intended for use with the Purifi 1ET400A, Purifi 1ET6525SA, and Hypex NC500 Class D amplifier modules.

Unlike other buffers, including the Purifi EVAL1 and the Hypex NC500 Evaluation Board, this Input Buffer will provide a differential output for the Class D amplifier, even if the input to the Buffer is single-ended. This ensures that even a single-ended source can drive the 1ET400A, 1ET6525SA, and NC500 to clipping, something the Purifi EVAL1, Hypex NC500 Evaluation Board, and many other input buffers cannot do. Many also report improvements in sound quality when the Purifi 1ET400A, 1ET6525SA, and Hypex NC500 are provided a differential input.

Read Positive Feedback's review of the Input Buffer and comparison with Purifi's EVAL1 here: Neurochrome Purifi 1ET400A, 1ET6525SA, Hypex NC500 Input Buffer Review.

Technical Documentation

  • The buffer is a single-channel (mono) buffer, with the following features:

    • Differential (balanced, XLR) input, which can easily be configured for single-ended (unbalanced, RCA) operation as well.
    • True differential output with common-mode feedback, which ensures a differential output, even when used with a single-ended source. 
    • Jumper-selectable gain: 0 dB and 13.2 dB for a total amplifier gain of 12.8 dB and 26.0 dB, respectively, when used with the Purifi 1ET400A.
    • Gain can be further customized by adding a resistor (1206 size SMD and leaded/PTH supported).
    • Plug-and-play connection with Hypex SMPS1200 and future Purifi power supply.
    • Opamp power supply: Use the AUX supply provided by the SMPS1200, or add your own regulator. A small daughterboard with support for the Hypex HPR/HNR, LM7812/LM7912, and LM78L12/LM79L12 is available as a product option.
    • Status indicator LED output (NC500: CLIP and READY; 1ET400A: READY).
    • Speaker output is provided both on 6.3 × 0.81 mm quick-connect spades and a terminal block accepting up to AWG 10 (5.2 mm2) in size.

    In addition, the following options are provided for advanced users:

    • The buffer can be disabled by removing two resistors. A three-pin connector footprint provides direct access to the Purifi 1ET400A, 1ET6525SA, and Hypex NC500 input.
    • A two-pin connector footprint provides access to the remote sensing pins of the Purifi 1ET400A and Hypex NC500.

    Please refer to the Purifi 1ET400A, 1ET6525SA, and Hypex NC500 data sheets for further information on how to use these two advanced features.

    The Purifi 1ET400A, 1ET6525SA, & Hypex NC500 Input Buffer circuit board is fully assembled, RoHS compliant, and is designed and manufactured in Canada.

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