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Aphex 124B Stereo Audio Level Interface Converter — main product image
Aphex

Aphex 124B Stereo Audio Level Interface Converter

Seamlessly Integrate Pro and Consumer Audio GearIntroducing the Aphex 124B Stereo Audio Level Interface. Bridge the gap between consumer and professional audio equipment for pristine audio quality and flexible connectivity. Connectivity: Two-way buffer for -10dBV consumer and +4 or +8dBm pro...

$299.00*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

Seamlessly Integrate Pro and Consumer Audio Gear

Introducing the Aphex 124B Stereo Audio Level Interface. Bridge the gap between consumer and professional audio equipment for pristine audio quality and flexible connectivity.

  • Connectivity: Two-way buffer for -10dBV consumer and +4 or +8dBm pro systems
  • Outputs: Two high-quality balanced outputs
  • Balancing: Servo-balancing

Key Features

Two way buffer allows use of consumer (-10dBv) gear with pro (+4 or +8dBm) systems

Acts as a signal splitter, providing two high quality balanced outs from an unbalanced "Y" connector

Servo-balancing allows the outputs may be used balanced or unbalanced

Two-way interface amplifier for connecting any unbalanced device such as a cassette deck, equalizer, CD player or DAT deck to the IHF inputs and outputs.

The servo-balanced input and output stages of the 124 can be used as a very effective line driver for long lines.

Specifications

Type
Stereo Audio Level Interface Converter
Function
Two-way buffer
Compatibility
Consumer (-10dBv) and Pro (+4 or +8dBm) systems
Output Capability
Balanced or Unbalanced
Input Devices Supported
Cassette deck, equalizer, CD player, DAT deck
Input/Output Stages
Servo-balanced
Additional Functionality
Signal splitter, Line driver

Pros & Cons

👍 Pros

  • Connects consumer (-10dBv) gear with professional (+4 or +8dBm) systems effectively
  • Functions as a signal splitter, providing two balanced outputs from an unbalanced input source
  • Outputs can be used in either balanced or unbalanced configurations due to servo-balancing
  • Serves as a two-way interface amplifier for various unbalanced devices like CD players and DAT decks
  • Utilizes servo-balanced input and output stages to act as a robust line driver for extended cable runs

👎 Cons

  • Requires specific knowledge of audio levels (-10dBv, +4dBm, +8dBm) for optimal setup
  • Does not include any integrated signal processing or effects beyond level conversion and buffering
  • Physical connections rely on external unbalanced "Y" connectors for splitting functionality
  • Functionality is limited to level conversion and signal splitting, not comprehensive audio mixing
  • May introduce additional cabling complexity depending on the existing audio system configuration

Frequently Asked Questions

The Aphex 124B is designed to connect unbalanced consumer-grade audio devices, such as cassette decks, equalizers, CD players, or DAT decks, with professional audio systems.
It features a two-way buffer that allows consumer-level audio signals (-10dBv) to be used with professional audio systems (+4 or +8dBm), and vice-versa, ensuring proper signal integrity.
Yes, the Aphex 124B acts as a signal splitter, capable of providing two high-quality balanced outputs from a single unbalanced input when used with an unbalanced "Y" connector.
The servo-balancing technology allows the outputs to be used in either a balanced or an unbalanced configuration, providing flexibility for different system requirements.
The servo-balanced input and output stages of the 124B can be utilized as a highly effective line driver, which helps maintain signal quality over long cable runs.

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