A__line – High-Quality Audio-over-IP Interfaces - SOUNDSTAGEAFRICAZIM

A__line – High-Quality Audio-over-IP Interfaces


Networked – flexible – reliable: The Lawo A__line series of high-quality Audio-to-IP interfaces is  designed to provide easy and reliable solutions for intuitively transporting analog and digital audio signals via IP network environments. Based on RAVENNA technology, all A__line devices are also compatible with the AES67 and SMPTE2110-30 audio-over-IP interoperability standard. A__line devices are managed with the Lawo VSM broadcast control and monitoring system. This enables convenient management of all IP audio and video streams from one unified control GUI without the necessity for deep IT knowledge.

The Lawo A__line currently consists of 
A__mic8 – Analog-to-IP Interface
A__digital8 – AES3-to-IP Interface
A__madi4 – MADI-to-IP Interface
A__OnAir4 – Audio-to-IP Interface

A__mic8 – Analog-to-IP Interface

Lawo A__mic8 (front)

The A__mic8 combines eight Lawo-grade Mic/Line Inputs, four Line Outputs, eight GPIOs, WordClock In/Out and two RAVENNA / AES67 Ethernet ports in a compact 19”/1RU device, supporting 44.1 / 48 / 88.2* / 96k*Hz sampling rates. Perfect for work in multiple applications and environments, the A__mic8 is designed to fulfill the highest demands in audio quality, providing ultra low distortion and noise with Lawo’s premium grade mic pre-amps.

Since the unit is powered over Ethernet (PoE), it can be connected with just one CAT5 cable. A second Ethernet port allows for hitless merge network redundancy and redundant power can be furnished via the device’s DC input. CAT5 cable allows a maximum distance of 100m (330ft) to the powering switch, with an optional Coax converter cable length can be extended to 1km (0.6mi).



    • Lawo-grade audio quality:


      • high dynamic range (118dBA)
      • ultra low distortions (THD&N 0.0003% for inputs)
      • ultra low equivalent input noise (EIN -128dBu@150Ω)


    • Click-free gain changes
    • 44.1 / 48 / 88.2* / 96*kHz operation
    • High RF immunity
    • One cable only:


      • PoE (Powered-over-Ethernet)
      • optional local PSU redundancy


    • Fan-free hardware design
    • RAVENNA / AES67 / SMPTE2110-30 compatible
    • Full remote control capability


Lawo-grade Microphone Pre-amps

A__mic8’s discrete Class-A microphone preamplifiers deliver excellent performance with ultra low equivalent input noise even at moderate gains and very low noise at low gains. And even at high gains the circuitry provides superb distortion performance and a flat frequency response. Lawo’s Advanced Preamplifier Gain Structure employs a fully digital gain stage and two noise-scaling amplifiers, one analog and one digital. The analog noise-scaling amplifier in combination with its digital counterpart is used to manage the analog gain stage for optimal noise performance. Lawo’s unique methodology also makes it possible to change gain settings in the digital domain without any audible clicks. In addition to the A__mic8’s superb gain performance characteristics, it also offers advanced digital filters within the A/D conversion process that utilize modified FIR filter architecture to minimize latency while maintaining excellent linear phase response.

High-End Analog Output Stage

The analog output interfaces of the A__mic8 are designed for sonic excellence, featuring ultra low distortion and tracked-current voltage sources in the output stages, guaranteeing nearly equal currents in both lines independent of the load. Due to the resulting high common mode output impedance these output stages are floating. This ensures excellent noise damping and high common mode rejection with all kinds of input stages, even unbalanced ones.

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