The Onkyo Icon P-80 is a network preamplifier with a built-in DAC and streaming, meaning it sits at the center of a system as the control and source hub while leaving amplification to a separate power amp. In practical terms, it combines three traditionally separate boxes into one chassis: a streaming endpoint, a digital to analog converter, and a line and phono preamplifier. The signal path begins at either a network stream, a digital input, or an analog input, is managed through the preamplifier stage with volume and source selection, and is then handed off through balanced or single ended outputs to your amplification. This topology appeals to enthusiasts who want a modern digital front end without abandoning the flexibility of a discrete power amplifier, and it keeps the noise generating high current amplification stage physically outside the sensitive preamp and DAC circuitry.
Why does a preamplifier centric design matter for sound quality?
A dedicated preamplifier centric design matters because it isolates the delicate low level signal handling from the electrical noise and heat that a built-in power amp would introduce. By separating the volume control, source switching, and digital conversion from any high current output stage, the P-80 can dedicate its internal real estate and power supply resources to keeping the signal clean before it is amplified. This separation is the classic argument for a preamp plus power amp arrangement, and the P-80 embraces it while still folding in the convenience of network streaming. The result is a component that lets you choose the power amplifier that suits your loudspeakers rather than accepting a fixed onboard amp.
Digital Conversion and Processing
How capable is the built-in DAC?
The P-80 uses a built-in 32-bit/768 kHz digital to analog converter, which is among the highest resolution specifications currently available on consumer conversion hardware. The 32-bit figure refers to the theoretical bit depth the converter can accept and process, while the 768 kHz figure is the maximum sample rate it can handle. In real world terms, no commercial recordings are distributed at 768 kHz, so this headroom exists to accommodate upsampled material and to give the internal digital filters ample room to operate without running into their own ceiling. A converter with this much overhead can apply oversampling and reconstruction filtering with less risk of aliasing artifacts intruding into the audible band, which is the practical benefit of a high sample rate ceiling rather than any expectation that you will feed it native 768 kHz files.
What does a high bit depth actually buy you?
A high bit depth primarily buys you dynamic range and a lower noise floor in the digital domain, though the audible limits are reached well before 32 bits. Standard CD audio uses 16 bits, high resolution files typically use 24 bits, and a 32-bit capable converter accepts everything below its ceiling with room to spare. The genuine advantage of processing at 32 bits is that internal calculations, such as digital volume control and filtering, can be performed with enough precision that rounding errors stay far below the noise floor of the analog output. For the experienced listener, this means the digital volume control can attenuate without audibly discarding resolution, which is a meaningful concern in any DAC that handles volume in the digital domain.
Network and Streaming
Which streaming services and protocols are supported?
The P-80 natively supports Spotify, TIDAL, and Amazon Music, and it accepts audio through Chromecast built-in, AirPlay 2, and DTS Play-Fi. This is a deliberately broad selection that covers the major ecosystems, so an iOS user can cast directly through AirPlay 2, an Android or Chrome user can stream through Chromecast built-in, and Play-Fi users can integrate the P-80 into a multiroom Play-Fi setup. Having native service integration means the P-80 pulls the stream directly from the service over your network rather than relying on your phone as an intermediary, which is both more reliable and higher fidelity because the audio bypasses the phone's own conversion and Bluetooth compression.
How do you control the P-80 day to day?
Day to day control is handled through the Onkyo Controller app, which serves as the interface for source selection, streaming service browsing, and system settings. The app communicates with the P-80 over your network, giving you a single point of control from a phone or tablet without needing line of sight the way an infrared remote would require. For an enthusiast running multiple sources, the app centralizes management of the streaming services and inputs, and it is the primary tool for firmware updates and configuration of features like the subwoofer outputs.
Should you use Wi-Fi or Ethernet?
The P-80 provides both Wi-Fi and Ethernet, and for critical listening a wired Ethernet connection is generally the more robust choice. Ethernet delivers a stable, low jitter, interference resistant path to your network, which matters when streaming high resolution files that demand consistent bandwidth. Wi-Fi offers placement flexibility when running a cable is impractical, and the onboard wireless is fully capable of handling streaming duties, but a wired backbone eliminates the variables of wireless congestion and signal strength. Enthusiasts who can run a cable to the rack will usually prefer Ethernet for its consistency.
What is Bluetooth for on a component like this?
Bluetooth on the P-80 exists for casual, convenient playback from any phone, tablet, or computer that lacks the app or network access to use the higher fidelity paths. Bluetooth is a direct point to point wireless link, so it is the fallback for a guest who wants to play something quickly or for a device that is not on your network. It is not the path to reach for when you want maximum fidelity, since Bluetooth involves lossy compression, but it is invaluable for the moments when convenience outweighs absolute quality.
Analog Inputs and the Phono Stage
How many analog line inputs are there?
The P-80 offers four RCA line level inputs, one of which is switchable to serve as a phono input. This gives you ample room for traditional analog sources such as a CD player, a tuner, or a tape deck, all connected through standard unbalanced RCA cabling. Four inputs is a generous count for a component that also carries multiple digital and network sources, and it reflects a design that expects to serve as the true hub of a mixed analog and digital system rather than a digital only endpoint.
What does the switchable MM/MC phono stage do?
The switchable Moving Magnet and Moving Coil phono stage lets one of the RCA inputs accept a turntable directly, with the ability to match either cartridge type. Moving magnet and moving coil cartridges produce very different output voltages and require different loading, so the ability to switch between them means you are not locked into one style of cartridge. The phono stage provides the substantial gain and RIAA equalization that a turntable signal requires before it can join the rest of the line level sources, and having it built in removes the need for a separate outboard phono preamplifier. For a vinyl enthusiast, the MC setting in particular is what allows the use of low output moving coil cartridges that many built-in phono stages cannot accommodate.
Digital Inputs
What digital inputs are available?
The P-80 provides one coaxial digital input, one optical digital input, HDMI ARC, and a USB-A port. The coaxial and optical inputs are the standard S/PDIF connections for CD transports, disc players, and older digital sources, with coaxial generally offering better resistance to jitter and optical offering complete electrical isolation between components. This pair covers essentially any legacy digital source you might want to route into the P-80's high resolution converter.
Why does HDMI ARC matter here?
HDMI ARC matters because it lets the P-80 receive audio directly from a television, making it viable as the heart of a two channel system that also handles TV sound. The Audio Return Channel carries the television's audio back down the HDMI cable to the P-80, so a single connection lets your TV send its sound to the preamplifier and, when configured, respond to volume commands. This is what turns a purist two channel setup into something that also serves a living room, feeding the television's audio through your main loudspeakers rather than the set's built-in speakers.
What is the USB-A input for?
The USB-A port is intended for direct playback from USB storage, letting you connect a flash drive or drive loaded with your own files. This gives you a local, network independent way to play your library through the built-in converter, which is useful for archived high resolution files that you would rather not stream. It is a self contained playback path that relies on the P-80 and its DAC alone.
Outputs and System Integration
What preamp outputs does the P-80 offer?
The P-80 provides both balanced XLR pre-out and RCA pre-out connections, giving you the choice of balanced or single ended links to your power amplifier. Balanced XLR outputs use a differential signal that rejects noise picked up along the cable, which is advantageous over long runs or in electrically noisy environments, while the RCA pre-out serves amplifiers with single ended inputs. Offering both means the P-80 pairs with virtually any power amplifier, and an enthusiast with a balanced amplifier can take full advantage of the noise rejection that a differential connection provides.
How do the subwoofer outputs work?
The P-80 includes two independent subwoofer outputs, which allow you to run a pair of subwoofers that can be configured separately. Two independent outputs let you place subwoofers asymmetrically and address room modes more effectively than a single mono output would, since dual subwoofers smooth the bass response across a wider listening area. This is a feature usually associated with dedicated processors, and its inclusion here signals that the P-80 is meant to anchor a serious full range system.
Is there a headphone output?
Yes, the P-80 includes a headphone output, driven by the same high resolution converter and preamplifier stage that feed the main outputs. This gives you private listening directly from the hub without needing a separate headphone amplifier, drawing on the internal circuitry for a consistent sonic character between speakers and headphones. For late night sessions or focused critical listening, it keeps the entire signal chain within one carefully designed component.
