PS Audio Sprout100 Integrated Amplifier In The House!

Ever since the first version of PS Audio’s Sprout Integrated Amplifier was announced back in 2015, I was intrigued by its promise. PS Audio was a well-respected high-end audio company, with renown driven not only by great sounding gear but also by the personality of its founder Paul McGowan. Before Sprout, all of their gear was high-end separates, components with amps, dacs, and preamps contained in separate boxes.  They were very good, but not accessible to a good portion of people either just getting started in the hi-fi hobby or just looking to put together an affordable system. Not to mention the fact that many people just didn’t have room for multiple components.

As an answer to this, the founder’s son, Scott McGowan, decided to create a small, affordable, integrated amp which offered the same quality and performance of his father’s more expensive designs. This led to the $499 Sprout, which got many good reviews but also left people wanting more since it didn’t have a remote or optical input, and was only 32W per channel into 8 Ohms.

Last year, these issues were addressed in the new $599 Sprout 100, which has the optical in, a very nice metal remote, and more power in the form of 50W per channel Class-D ICEpower. I just got one in for review, and the pictures really don’t do it justice. It really looks a lot nicer in person. I never got the chance to hear the first Sprout outside of a show setting, so I’m really glad to be able to audition the new model in my space. Stay tuned for my review…



Unit Weight 2.9 lbs [1.3 kg]
Unit Dimensions Width 6.2″, Height 1.9″, Depth 8.2″ (chassis only, not including knobs) or 9.2” (including connectors and knobs)
Shipping Weight 5lbs [2.2 kg]
Shipping Dimensions Width 10.5″, Height 5″, Depth 14″

Power requirements

Voltage Options 100-240 VAC, 50-60Hz, Auto-Detect
Power Consumption 280W Maximum
Mains Power Input IEC C14

Phono Audio Input

Connector 1 Stereo Pair, Phono RCA
Cartridge type Moving Magnet
Cartridge Output 3mV-10mV (5mV recommended)
Cartridge Loading 47KΩ (100pF)
Gain +40dB
S/N ratio >84dB A-weighted (analog output)

Analog Audio Inputs

Connector 1 Stereo Pair, Line Level RCA
Maximum Input level 2.1VRMS (+6.44dBV)
Input impedance 10KΩ

Analog Audio Output

Connector 1 Stereo Pair, Line Level RCA
Output level, maximum 3.0VRMS (+9.5dBV)
Output Max Gain (using Analog Inputs) 8.45dB
S/N ratio >105dB (3VRMS ref)
THD (Analog) <0.01% (1VRMS, 1KHz)

S/PDIF Digital Input

Connector Optical (Toslink)
Format PCM (96KHz max), 24 bits

USB Input

Connector USB “B” Type
Format PCM (384KHz max), 24 bits, DSD64 (DoP), DSD128 (DoP)
Transfer mode Asynchronous


Antenna Built in
DAC Uses Sprout’s built in asynchronous DAC over S/PDIF (ESS Sabre 9016 DAC)

Stereo Power Amplifier Output

8Ω loudspeakers connected 50 watts per channel, both channels driven
4Ω loudspeakers connected 100 watts per channel, both channels driven
THD (Speaker Output) <0.01% (1W, 1KHz into 4Ω)
Frequency Response +/- 1dB (1VRMS out, 20Hz – 20Khz into 4-8Ω)
Signal to Noise >100dB at max power into 4Ω

Headphone Output

32Ω headphones connected 500mW
300Ω headphones connected 125mW
THD <0.01% (1KHz, 50mW into 32 Ω)
Signal to Noise >105dB at max power into 300Ω

Leave a Reply