Audio-GD Precision 3 2020 Edition: A Focused Discrete Power Amplifier

The Precision 3 2020 Edition is a tightly focused power amplifier for systems built around a separate preamplifier or DAC with volume control. Audio-GD’s design emphasizes discrete circuitry, a short signal path, Class A operation in its input, gain, and prebuffer stages, and the company’s proprietary ACSS current-mode interface. Its standard output is rated at 70 watts per channel into 8 ohms, while a bridged monaural configuration raises the available output to at least 200 watts. Although its connectivity is intentionally limited, the combination of conventional RCA and ACSS inputs gives the amplifier a place in both traditional systems and an Audio-GD-centered setup.

A fully discrete approach to amplification

The defining feature of the Precision 3 2020 Edition is its 100% discrete architecture. Audio-GD specifies discrete analog stages throughout the amplifier, without operational amplifiers or coupling capacitors in the signal path. For a prospective owner, the significance is not simply the component count. It reflects a deliberate attempt to keep the amplification circuit direct and under the designer’s control rather than relying on integrated amplifier modules.

Its input stage uses a non-feedback, Class A ACSS circuit feeding a DC-coupled analog amplifier. The gain and prebuffer stages also operate in Class A. DC coupling removes the need for signal-path coupling capacitors between these stages, while the non-feedback input reflects Audio-GD’s preference for controlling signal behavior through circuit architecture rather than global corrective feedback.

The output stage is described as an open-loop diamond-cross design intended to avoid crossover distortion. Audio-GD positions this arrangement as a way of obtaining some of the operational advantages associated with Class A designs without stating that every part of the output stage continuously behaves as a conventional high-bias Class A amplifier. It is a distinctive topology within an otherwise straightforward stereo power-amplifier format.

Why ACSS is central to the design

ACSS, or Audio-GD Current Signal System, is more than an additional connector option on the Precision 3. The amplifier operates internally in ACSS mode, effectively processing the signal as current gain rather than relying on a succession of conventional voltage-gain stages. Audio-GD uses a single voltage-gain stage, an approach intended to shorten the signal path and reduce the number of stages through which the source must pass.

The ACSS input is consequently the most direct way to integrate the amplifier with compatible Audio-GD equipment. An Audio-GD DAC-preamplifier or preamplifier equipped with ACSS outputs can pass a current-mode signal to the power amplifier without first converting it for a conventional voltage interface. Owners considering an all-Audio-GD system may find this particularly attractive because the connection method is part of the amplifier’s underlying architecture rather than an added convenience feature.

The 2020 Edition also incorporates a later implementation of ACSS technology intended to improve performance through its conventional RCA input. Audio-GD’s stated objective was to bring RCA operation closer to that of the proprietary connection. This matters for system flexibility: choosing the Precision 3 does not require the immediate replacement of a conventional preamplifier or DAC-preamplifier merely to access the amplifier’s core functions.

Useful power in stereo and mono systems

In normal stereo operation, the Precision 3 is rated at 70 watts per channel into 8 ohms. That specification places it in a useful middle ground for many passive loudspeaker systems, provided the loudspeaker’s impedance behavior and sensitivity are appropriate. The stated gain is 25 dB, input sensitivity is 1.5 Vrms through RCA and 2 mArms through ACSS, and the maximum output level is specified as 25 V.

The amplifier can also be configured as a bridged monaural unit, with Audio-GD specifying output of at least 200 watts in that mode. This creates a practical expansion path: a system can begin with one amplifier in stereo and later move to two units, with each Precision 3 driving one loudspeaker. Bridging may also be relevant where additional output is required for a particular speaker installation.

This configuration is not plug-and-play, however. Audio-GD states that bridged operation requires either a preamplifier with conventional balanced XLR outputs or a compatible Audio-GD NFB-series DAC-preamplifier. Proprietary Audio-GD interconnect cables, sold as accessories, are needed for the specified bridge wiring. The Precision 3 itself does not list a native XLR input, so prospective owners should account for the required cabling and source configuration before planning a pair of amplifiers.

Headphone capability with important context

Audio-GD specifies headphone output power of 15 watts per channel into 40 ohms, a substantial figure on paper. It suggests that the amplifier platform can accommodate demanding headphone loads when used in the intended configuration. However, the documented connections list RCA and ACSS inputs plus speaker-terminal outputs; no dedicated front-panel headphone socket is identified in the supplied specifications.

Anyone considering the Precision 3 primarily for headphones should therefore confirm the required connection arrangement and any necessary adapter or interface directly with the manufacturer or seller. The power rating is noteworthy, but it should not be interpreted as evidence of the same operating convenience offered by an amplifier with a clearly documented integrated headphone jack.

Minimal connectivity, clearly defined roles

The rear-panel concept is deliberately simple: one RCA analog input, one ACSS input, and two loudspeaker terminals accepting banana plugs. There are no documented digital inputs, source-selection features beyond the two analog connections, streaming facilities, phono stage, or built-in volume control. This is a power amplifier rather than an integrated system hub.

That narrow purpose can be a strength in an appropriately planned system. Owners who already have a preferred DAC, preamplifier, streamer-preamplifier, or analog control center are not paying in space or circuit complexity for duplicated source functions. At the same time, buyers seeking a single component to connect directly to several digital and analog sources will need additional equipment.

The listed input impedances are 47 kilohms for RCA and 10 ohms for ACSS, consistent with the very different voltage-mode and current-mode interfaces. System matching should therefore follow the designated connection type rather than treating ACSS as a conventional balanced analog input.

A dense but manageable physical format

The Precision 3 measures 240 x 360 x 80 mm and weighs 8 kg. Its 240 mm width is narrower than that of many full-size hi-fi components, while the weight indicates a relatively dense amplifier rather than a lightweight desktop device. The low 80 mm height may make placement easier, but adequate ventilation remains sensible for an amplifier whose input, gain, and prebuffer circuits operate in Class A.

Specified power consumption is 30 watts. The documented supply requirement is 220–240 V AC at 50 or 60 Hz, an important regional limitation for prospective owners. No alternative voltage version is identified in the supplied specifications, so compatibility should be checked rather than assumed in markets using a different mains standard.

Other published figures include a signal-to-noise ratio above 115 dB, total harmonic distortion of 0.003%, crosstalk of 100 dB, and a frequency response of 20 Hz to 20 kHz at -0.5 dB. These figures outline the design targets, though they should not be treated as independent test results.

Who the Precision 3 is most suitable for

The Precision 3 2020 Edition is best suited to listeners assembling a separates-based system and comfortable choosing a dedicated preamplifier or DAC-preamplifier. Its ACSS input makes it especially relevant to existing Audio-GD owners, while the RCA input allows it to work with more conventional line-level equipment. The 70-watt stereo rating should suit many appropriately matched loudspeakers, and bridged operation offers a route toward higher-power monaural amplification.

It is less suitable for someone wanting the convenience of an integrated amplifier with multiple sources, remote volume control, digital conversion, streaming, or clearly documented front-panel headphone connectivity. Bridged use also demands careful planning because it depends on suitable preamplifier outputs and optional proprietary cables. Finally, the stated 220–240 V supply requirement restricts straightforward use in other mains regions unless an appropriate version is confirmed.

For the right system, its appeal lies in specialization. The Precision 3 concentrates its design effort on discrete analog amplification, a short current-mode signal path, and flexible deployment as either a stereo amplifier or one half of a bridged mono pair.

Conclusion

The Audio-GD Precision 3 2020 Edition stands out through its fully discrete architecture, Class A input and gain stages, DC-coupled signal path, and proprietary ACSS current-mode operation. Its 70-watt-per-channel stereo output, conventional RCA compatibility, and at-least-200-watt bridged mode provide meaningful system-building options without turning the amplifier into a multipurpose control center. It is most compelling for owners who already use separates—particularly compatible Audio-GD source and preamplifier components—and who value focused analog engineering over extensive onboard features. Careful attention to preamplifier matching, bridge cabling, headphone connection requirements, loudspeaker suitability, and the specified 220–240 V mains input remains essential.