Editing PS Audio (section)

===2014–present===
In recent years the company has grown dramatically in size, product range, and presence. The DirectStream DAC, launched in 2014, brought unique technologies to a DAC field crowded with similar chip-based solutions. Designer Ted Smith created a DAC based upon an FPGA (field-programmable gate array) which would allow owners to download and install no-cost firmware/OS upgrades which improve the unit's performance over time, and ensure that it does not become obsolete. As of July, 2019, the company has offered nine  OS upgrades; recent ones have been named after "fourteeners", Colorado peaks which top 14,000 feet in height. The most recent of these is "Snowmass", released in November, 2018. The DirectStream also converts all inputs to DSD for processing; in Snowmass, signals are converted to 20 x the nominal SACD rate (56.338Mhz) and then converted back down to quad rate DSD (11.2896&nbsp;MHz), with the output stage being a passive low-pass filter. Thousands of DirectStream DACs have been sold, with many in use in recording studios and as reference components by reviewers.

Sprout, a compact integrated amplifier featuring a phono stage, Bluetooth, and a headphone amp, was introduced in a Kickstarter campaign in 2014; subsequently, thousands of units were sold. In 2018 a second generation unit, Sprout100, was introduced; the name reflected the increased power output of 100 watts/channel into 4 ohms. Other improvements included a fully asynchronous DAC that can handle 384/24 PCM or double rate DSD; dedicated subwoofer output; optional bass boost; high-quality, metal remote control; analog RCA inputs and outputs; and a TOSLINK optical input.

Since 2015, PS has released three amplification products designed by industry veteran Bascom H. King, under the line name of  BHK Signature. During more than 40 years in audio, King has designed products for Infinity, Marantz, Conrad Johnson, Constellation, and Audeze, among many others, and the BHK Signature line represents the culmination of all his experience and knowledge. The BHK Signature Preamplifier input stage features two 12AU7 dual triode vacuum tubes, which act as a zero-feedback balanced input amplification pair. Volume is controlled by a combination of an input stepped attenuator, built around the highest quality passive components for coarse volume adjustments, after which the actual gain of the vacuum tube is controlled, for finer steps. The control is designed to have no sonic signature of its own. The unit's output stage is a high-bias class-A MOSFET design that is unaffected by cable and power amplifier interface challenges. The BHK Pre also includes a headphone amp possessing extremely low/near zero output impedance, zero feedback, and featuring discrete MOSFET  circuitry.

There are two amplifier models in the BHK Signature line: the Stereo 250 and Mono 300. Both utilize vacuum tube input stages and MOSFET outputs; the Stereo 250 produces 250 watts/per channel into an 8Ω loudspeaker, 500 watts/channel into 4Ω, and is stable into 2Ω. The Mono 300 produces 300 watts into 8Ω, 600 into 4Ω and more than 1,000 watts into 2Ω. The Mono 300 doubles the output current with half the impedance of the stereo model, by doubling every internal component of the 250 into one unit: double tubes, double power supplies, transistors, capacitors and resistors.

The high-value Stellar line was introduced in 2017, designed to bring PS Audio performance to lower-priced, full-sized components. The line was launched with three products: the Gain Cell DAC/preamp. the S300 stereo amp, and the M700 mono amps. The Gain Cell DAC is a moderately-priced combination DAC and preamp that also incorporates a high-performance headphone amp; the S300 produces 140 watts per channel into 8Ω; 300 watts per channel into 4Ω; and is stable into a 2Ω load. The M700 offers a measurable increase in performance that is immediately audible, is the least-expensive amplifier listed in Class A of Stereophile magazines Recommended Components list, and is also one of the most powerful. Its 350 watts into 8Ω, 700 watts into 4Ω, and stability into a 2Ω load ensure that the M700 can drive any loudspeaker. In March 2019, the Stellar P3 Power Plant was introduced, bringing PS Power Regenerator power technology to a lower price-point. A Stellar phono preamp will be introduced in Q3 of 2019, and a Stellar integrated amplifier will be released in 2020.

The Power Plant line of power regenerators has been periodically improved. Newer models consist of the P12, P15, and P20 Power Plants, differing primarily in their power-handling capacity and number of outlets. All three models utilize FPGA-based DSD sine wave generators. Both the P12 and P20 are listed in Stereophile's Recommended Components list.

At Rocky Mountain Audio Fest in October 2018, PS exhibited the final prototype loudspeakers created by the late Arnie Nudell, founder of both Infinity Systems and Genesis Technologies and longtime friend of and mentor to PS Audio. These speakers featured several characteristic  Nudell design features: dual servo-controlled, powered woofers; a cone mid-bass coupler; a ribbon linesource midrange; and a line array of spiral ribbon tweeters. While these design points do not necessarily reflect how future PS Audio loudspeakers will be designed, they do serve as a basis for experimentation and developments.

At Axpona in April, 2019, PS showed an initial prototype of the AN3 loudspeaker, intended to be the smallest of the AN line of speakers inspired by Arnie Nudell's work. Development continues in the AN line, which will eventually consist of the AN3, the smallest; the AN2, larger and more elaborate; and the AN1, a full-scale assault upon the state of the art, along the lines of the legendary Infinity IRS V. Less-expensive speakers are intended to be introduced below the AN line: a Stellar line, also consisting of 3 models; and at least one Sprout loudspeaker, designed to be compatible with the Sprout 100 in both appearance and capabilities.

The company's outreach has greatly increased in recent years, by way of co-founder/CEO Paul McGowan's Daily Posts; his "Ask Paul" videos on YouTube; and Copper, a twice-monthly webzine devoted to music and audio that appears on the PS Audio website. PS Audio products have won many awards worldwide, including Editors' Choice awards from Stereophile and The Absolute Sound magazines; since 2017, PS has had more products on Stereophile's Recommended Component lists than any other electronics manufacturer.