RSPduo – High performance dual tuner SDR by SDRplay

RSPduo a new high performance 1kHz-2GHz 14-bit dual tuner software defined radio receiver, by SDRPlay


During the last Dayton Hamvention, SDR Play announced their new high perfomance SDR receiver, the RSPduo,  a 14-bit dual tuner that looks estetically similar to the previous SDRPlay products, but is radically new from the architectural point of view.


The RSPduo is a radical new addition to the RSP line of SDR receivers from SDRplay. Architecturally, it is different from any previous RSP in that it features dual independent tuners, both piped through a single high-speed USB 2.0 interface.

The SDRplay RSPduo is a dual-tuner wideband full featured 14-bit SDR which covers the entire RF spectrum from 1kHz to 2GHz giving 10MHz of spectrum visibility. Initially using Windows based  ‘SDRuno’ supplied by SDRplay, you can simultaneously monitor two completely separate 2MHz bands of spectrum anywhere between 1kHz and 2GHz.

The RSPduo dual tuner

Superficially the RSPduo looks identical to the highly popular RSP2pro and will be able to operate in a very similar way. However, it also allows a completely new and exciting set of usage scenarios such as:

1. Simultaneous monitoring of two widely spaced bands – e.g. 40m (HF) and 2m (VHF)
2. Mixing and matching applications simultaneously – e.g. ADS-B and ATC scanning
3. Phase and time coherent demodulation of two receivers

Scenario 3 is very difficult to achieve with two separate USB devices because of the uncertainty of USB latency. The RSPduo overcomes this limitation because all traffic goes through a single USB interface, thus enabling the possibility of the development of various types of diversity demodulation such as: spatial, frequency and polarisation which can bring huge benefits in terms of improved performance.

As well as adding a second independently controlled tuner, which in itself, offers a whole new set of exciting usage possibilities, the SDRduo features 14bit ADCs and a completely re-designed RF front end. These changes provide better RF selectivity and even more dynamic range, offering outstanding performance under extremely challenging reception conditions. The combination of performance and features makes the RSPduo our highest spec RSP yet and sets a new benchmark in the sub $300 SDR market.

Lots of great new videos are appearing on YouTube showing the Dual Tuner RSPduo in use.

RSPduo reviews and movies



About SDRplay:

SDRplaySDRplay limited is a UK company and consists of a small group of engineers with strong connections to the UK Wireless semiconductor industry. SDRplay announced its first product, the RSP1 in August 2014

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  1. I love my SDRPlay RSPduo.
    I use if mostly for receiving digital modes on shortwave frequencies. With two 130 ft. long dipoles at 60 feet up and using Diversity Antenna mode, the results are incredible!
    I discovered that the 4-cire CPU of my computer ran out of capacity when I tried to use the 10 MHz bandwidth mode of the RSPduo. But I recently upgraded to a super fast computer, a Dell Inspiron 3880 which has an Intel Core i5-10400 10th Generation processor. With the new computer, the SDRuno software shows only 1% of CPU usage by the SDR software while receiving with 10 MHz bandwidth!
    See this result at .

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