Biquad DAP4-AM is a 4-band digital audio processor for AM radio, combining DSP multiband processing, AM-specific filters and analog/AES audio I/O to deliver loud, clean and tightly controlled modulation on medium-wave transmitters.
$ 4,330.00
Biquad DAP4-AM Digital Audio Processor is built for professional AM broadcasters that need precise modulation control, strong presence and clear on-air sound. Using DSP technology and a dedicated 4-band architecture for amplitude modulation, it controls programme peaks so AM signals sound louder and more consistent while remaining within regulatory limits.
The processor can work with two audio channels as separate sources or in mono, making it suitable for a range of studio and transmission setups. Its input stage uses a two-band AGC section to stabilise average programme level, followed by a four-band multiband processor with dedicated compression and limiting for AM. This helps maximise perceived loudness while maintaining clarity and speech intelligibility.
The Biquad DAP4-AM also includes AM-specific filters that shape bandwidth and high-frequency content to fit the modulation envelope of typical AM transmitters. Analog and AES/EBU audio inputs and outputs allow straightforward integration with both legacy and modern broadcast infrastructure, while front-panel metering and status indicators give engineers quick feedback on levels and processing behaviour.
Biquad DAP4-AM is designed to sit directly between the studio and AM transmitter and works particularly well with AM transmission solutions from Broadcasters Warehouse. It can drive turnkey systems such as the Broadcasters Warehouse 20W AM Package for low-power services, integrate with professional monitoring solutions like the Belar AMMA-2 AM modulation monitor and analyser for precise on-air compliance, and form part of more advanced AM and DRM-AM chains built around exciters such as the RFmondial LVe DRM-AM exciter.
