Primare I25 Prisma

Amplifier & Audio Section
Network & Multiroom Audio
USB & Bluetooth Integration
Remote & App Control

Amplifier & Audio Section

UFPD 2 Amplification Technology: The amplifier section utilizes Primare's new proprietary UFPD 2 power technology, providing immediate and sustained high power output with very low distortion, instantaneous rise time and absolutely linear amplification across the entire bandwidth resulting in a naturally fast, clean and agile sound over an ultra-wide frequency range and with exceptional headroom. UFPD 2 combines state of the art Class D amplifier efficiency together with state of the art audio performance. Providing 100 watts at 8 ohms and 200 watts at 4 ohms of linear UFPD 2 amplification across the entire audible bandwidth, the I25 Prisma delivers naturally fast, clean and agile sound with an unprecedented ability to bring music to life.

• Class D Technology: Class D amplifier technology has many inherent advantages, one of which is the ability to locate the heat sink directly on the circuit board within the amplification module, considerably reducing circuit path length and allowing for the power output devices to be directly connected to the speaker output connection posts. The term "Class D" is sometimes misunderstood as meaning a "digital" amplifier. While some Class D amps may indeed be controlled by digital circuits or include digital signal processing devices, Primare’s UFPD 2 amp modules operate entirely in the analog domain. Basically, the UFPD 2 amplifier module takes an analog input sine wave and converts it into a high-frequency pulse-width modulated square wave for amplification. This square wave is then filtered, resulting in an amplified analog sine wave at the output.
• New Amplifier Circuit: Within the UFPD 2 is a new amplifier circuit has been developed that does not affect the gain versus frequency curve and thereby the bandwidth does not have to be limited. This gives very low phase shift in the audio band and a larger closed loop bandwidth. Using a custom made output coil in the 2nd order filter error amplifier with the same loop gain results in feedback control across the entire audio band. It has been optimized to keep the loop gain constant in the audio band, which means it is actually lower at low frequencies than with UFPD but much higher at high frequencies. The result is even more linear amplification, with lower noise, providing an absolute silent background from which music has a more holographic, three-dimensional, life-like character

Thoroughly Implemented Power Supply: A thoroughly implemented power supply design is utilized so that the Primare I25 Prisma can operate effortlessly at its fullest effectiveness. The power supply has been carefully selected, meticulously crafted, and strategically inserted into the I25 Prisma integrated amplifier.

• Switch Mode Power Supply: Given the speed with which the UFPD 2 amplifier module is able to deliver power to a speaker a switch mode power supply was the only choice in that it allows for rapidly varying demand, providing much more stable voltage, with ancillary capacitive storage to meet peak transient burst requirements.
• Active Power-Factory Correction (APFC): This newly developed Active Power-Factor Correction (APFC) converter is as much as 5% more efficient than past supplies, and comprises dual PFC converters 180 degrees out of phase from each other. AFPC is used to avoid input current harmonics, thereby minimizing interference with other devices being powered from the same source. This reduces the total current ripple and improves EMC (Electromotive Compatibility), while current ripple at the output of the PFC converter is also reduced, which decreases stress within the circuit for prolonged life. Additionally, the supply operates in what is called "transition mode", minimizing switching losses and improving overall efficiency in delivering power to the UFPD 2 amplification module.

Simple Circuitry Design: The I25 Prisma utilizes simple circuitry design and architecture with ultra-short signal paths, double-sided circuit boards, and surface-mount components for natural and unaltered sound.

• Ultra-Short Signal Paths: Ultra-short signal paths are used so that each individual component and sub circuit operates sympathetically to achieve a cohesive whole. Elegant and simple electrical designs are used in even the most complex product, utilizing ultra-short signal paths with all gain in one device whenever possible. Ultimately, this results in fewer, higher quality parts for a reduction in associated distortions and an increase in overall electrical efficiency.
• Double-Sided Circuit Board Construction: 2 and 4-layer double-sided circuit board construction allows for the most direct and efficient layout of circuit components not only for the shortest signal path, but also to more easily achieve a sympathetic layout of circuit and sub-circuit components for best performance.
• Surface-Mount Components: Surface-mount components are used whenever possible as this allows for direct connection of the circuit device or component to the circuit board trace with the solder being used solely to mechanically hold the part in place. The elimination of the small metal lead or wire at each connection point in a more conventional large scale circuit device or component cumulatively shortens the signal path.

Digital-to-Analog Conversion (DAC) Technology: In order to allow for playback of virtually any digital source with absolute accuracy and musicality, the I25 Prisma's refined DAC stage recreates high-resolution sound that is as close as possible to the original source.

• 32-Bit Stereo DAC: At the heart of this high-resolution DAC stage is a premium 32-bit stereo DAC that is capable of achieving -128dB (stereo) S/N and -116dB THD+N, while supporting up to 768kHz PCM and 11.2MHz DSD. This ability to handle higher resolution file formats will allow for the potential of future software upgrades.
• OSR Doubler: The high-resolution DAC integrates a newly developed switched capacitor filter "OSR Doubler" that greatly reduces sound degradation from noise shaping, achieving a flat noise floor up to 200kHz. An innovative design technique utilizing a symmetrical layout for the left and right channels prevents signal quality deterioration, and a 32-bit digital operation block provides full 32-bit processing.

Analog & Digital Inputs (Fixed or Variable): The I25 Prisma is outfitted with both analog and digital inputs. There are five stereo RCA analog audio inputs, plus four optical (toslink) digital inputs and two coaxial (RCA) digital inputs. The digital inputs support up to 24-bit/192kHz stereo (2ch) PCM audio. The analog & digital inputs can be set to a fixed or variable gain. The variable gain is adjustable from -30dB to 0dB in 1dB increments.

Analog & Digital Outputs: The Primare I25 Prisma is equipped with both analog and digital outputs. The integrated amp features a stereo RCA line output and a stereo RCA pre-out. The stereo RCA line output can be used for audio dubbing. The stereo RCA pre-out can be used to connect a powered subwoofer or external power amplifier. There is also a digital coaxial (RCA) output for connect to an external DAC.

Binding Posts: The Primare I25 Prisma is equipped with four heavy-duty, gold-plated binding post terminals to connect a single pair of loudspeakers. The binding post terminals will accept bare wire (up to 10AWG), pin-connectors, and banana plugs (single only). You can connect a single pair of 4 ohm to 8 ohm speakers.

Volume Settings: The integrated amp has a volume range of 0 to 99. You can adjust the units start up volume (0-60), maximum volume (0-99), and mute volume level (0-30).

Auto-Sense & Auto Standby: The Auto-Sense function automatically turns on the integrated amp when it sense an audio signal. The unit will enter Standby automatically when there is no audio signal and no user interaction for 10, 15, or 20 minutes. These functions can also be turned off.

Network & Multiroom Audio

Wired or Wireless Network Connectivity: The Primare I25 Prisma integrated amplifier offers wired and wireless network connectivity. It's outfitted with two Ethernet (RJ45) jacks (LAN In/Lan Out) for a hardwired connection to your network router and a wired daisy-chain network connection to another network enabled device. It also features built-in dual-band 2.4/5GHZ WiFi (802.11 a/b/g/n/ac) for a wireless connection to your WiFi router. Two antennas are included and must be installed to make a wireless WiFi connection.

AirPlay 2: AirPlay 2 is an advanced and easy-to-use wireless multiroom audio platform for iTunes, Apple Music, and other compatible Apple iOS apps. With AirPlay 2 you can play any sound from your Apple iOS device (running iOS 11.4 or later) or Mac computer (running OS X 10.13.2) through the Pimare Prisma Series integrated amplifier and other compatible AirPlay 2 speakers throughout your home. You can choose to play audio in one room, play the same audio in grouped rooms, or play the same audio in every room. If you are an Apple Music subscriber, you can even play different music in different rooms (you can control and group directly from Apple's Music App and Home app on your Apple iOS device). You can even ask Siri-enabled devices (like your Apple iPhone, iPad, or Watch) to control playback of your Apple Music on the Primare integrated amplifier. In addition, you can watch videos and movies from YouTube and Netflix on your compatible Apple iOS device or Mac computer with perfectly synced audio on the Primare Prisma integrated amp.

Chromecast built-in: Use the Google Home App (for Apple iOS 12.0+ and Android OS 5.0+) to enable Chromecast built-in. Chromecast built-in gives you access to hundreds of online music streaming services, internet radio, and podcasts. Chromecast built-in streams audio directly from the cloud, so you get the 24-bit/96kHz sound quality and the ability to enjoy crystal clear sound exactly the way the artist intended. Simply tap the Cast button from a Chromecast built-in compatible music app on your Apple iOS or Android OS device to start streaming to the I25 Prisma integrated amp. You can search, browse, play, skip, and turn up the volume directly from the music apps you know and love on your compatible smartphone or tablet. Chromecast built-in supports FLAC, WAV, AAC, and MP3 music files. While you cast your music, you can still use your smartphone to answer a call, play a game, send a text, and even leave the room - all without interrupting what's playing on the Primare I25 Prisma.

• Music, Radio, & Podcasts: Chromecast built-in lets you play music from popular music services and search by artist, song, genre, album playlist, mood, or activity. You can also listen to your favorite internet radio stations and podcasts. Compatible music and internet radio apps include Tidal, Spotify, Pandora, TuneIn, iHeart Radio, YouTube Music, and more (subscriptions and fees will apply). Click here for a complete list of Chromecast built-in compatible apps. You'll also be able to stream your favorite music, playlists, podcasts, and more that are stored on your Android (OS 5.0+) device to the I25 Prisma. You cannot stream stored content on an Apple iOS device using Chromecast built-in. If you're on your laptop or computer, you can also cast any music streaming website through the Chrome web browser to the integrated amp.
• Multiroom Audio: Add more Chromecast built-in speakers throughout your home (sold separately) to create a whole house audio experience. You can play the same Chromecast built-in compatible music app (like Tidal, Spotify, or Pandora) on all speakers or groups of speakers in different rooms of your home. You'll be able control the multiroom audio system from the Google Home app on your Apple iOS or Android device, or using the Google Assistant and your voice on a compatible Google Home device.
• Voice Control (Optional): Purchase a Google Home wireless speaker (sold separately) and gain voice control of compatible Chromecast Built-in music apps. You'll be able to access a specific music app and then select a specific station or song using only your voice. You'll also have voice control over Play, Pause, Skip, & Volume. The I25 Prisma and your Google Home speaker must be connected to the same wireless (WiFi) network.

Spotify Connect: The integration of Spotify Connect will enable Spotify Premium users to instantly select and wirelessly stream music to the I25 Prisma integrated amp from within the Spotify app (Apple iOS or Android). Spotify is a digital music service that gives you on-demand access to one of the largest music libraries in the world (over 50 million tracks and counting). Spotify makes it easier than ever to discover, manage, and share music with your friends. You can browse music by artist, album, track, or most popular; and create your own music library with customized playlists.

Local Network Music Libraries: The Primare I25 Prisma supports DLNA and UPnP for wireless streaming from a Windows or Mac computer. Its capable of handling up to 24-bit/192kHz for WAV, AIFF, FLAC, and ALAC Hi-Res music files; up to 128/5.6MHz for DSD lossless audio files, and up to 320kbps/48kHz for MP3, AAC and WMA compressed music files. You'll be able to control and browse your computer's local music library from the Prisma app on your compatible Apple iOS or Android mobile device. The Prisma App will also display song title, artist name, album name, and album art.

• DLNA: The I25 Prisma is DLNA (Digital Living Network Alliance) 1.5 and Windows 7/8/10 compliant for audio networking. This means it's easier for you to access and enjoy digital music stored on your Windows PC or DLNA compliant NAS through the Prisma app on your compatible Apple iOS or Android device.
• UPnP: With support for UPnP (Universal Plug-And-Play), you'll be able to effortlessly stream music stored on your Windows PC, Mac computer, NAS drive, or other UPnP compliant device directly to the I25 Prisma. The network device needs to running a universal plug and play (UPnP) service; free and paid UPnP services are available. Some systems include a built-in version of a UPnP service.

Roon Ready: Roon is a feature rich music library and playback application that compiles all the music files available to your network and makes them easily available to play across the Primare I25 Prisma and other Roon enabled audio devices. Roon manages digital music files (including FLAC, WAV, AIFF, ALAC, and DSD) collected on hard drives and networked storage. It can also access your iTunes library, and optionally integrate with the Tidal and Qobuz music streaming services. Roon is available for mobile, laptop or desktop devices. When you open the Roon app, it will display your complete audio library together with its metadata and artwork along with all the available Prisma and Roon enabled devices. Simply select the music you wish to play and the I25 Prisma or Roon device in which you want to hear it on.

USB & Bluetooth Integration

USB-A Port: The Primare I25 Prisma features a rear-panel USB-A port for connection of a USB Mass Storage Class (MSC) device, such as a USB thumbdriver or hard disk drive (some hard disk drives will require external AC power). Its capable of handling up to 24-bit/192kHz for WAV, AIFF, FLAC, and ALAC Hi-Res music files; up to 128/5.6MHz for DSD lossless audio files, and up to 320kbps/48kHz for MP3, AAC and WMA compressed music files.

USB-B Port: The I25 Prisma is also equipped with a rear-panel USB-B port for connection to your Windows PC or Mac computer, so you can play music files stored on your laptop or desktop through the Primare integrated amplifier. The USB-B input allows playback of PCM (up to 32-bit/768kHz) and DSD (up to 256/11.2MHz) music files.

• Windows PC: Supports connection of Windows PC with 7, 8, 8.1, or 10 (32/64-bit) installed. You will also need to install the Primare Xmos audio driver that can be found on Primare's website.
• Mac Computer: Supports connection of Mac computer with OSX 10.4 or later (no separate driver is required).

Bluetooth Audio Streaming: The Primare I25 Prisma features built-in Bluetooth with support for wireless music streaming (A2DP), playback control (AVRCP) and multi-device pairing (SSP). The I25 Prisma integrated amp can be paired with a variety of Bluetooth-enable devices; including smartphones, tablets, laptops, and desktop computers. The Bluetooth wireless range is approximately 33'.

• Wireless Music Streaming: You are able to wirelessly stream stored music, music apps, and other audio content from your Bluetooth-enabled device to the I25 Prisma integrated amplifier. You can use the included remote to control Volume, Play/Pause and Skip functions. All other playback control, search functions, and song/artist/album display will still need to be done from your Bluetooth source device.
• Multi-Device Pairing: Simple Secure Pairing (SSP) allows devices to be paired without entering PIN codes. The I25 Prisma remembers multiple devices and connects automatically to the last paired device when turned on again. Only one device can be connected to the integrated amplifier for playback at a time.

Remote & App Control

IR Remote: The included IR remote provides wireless operation of the I25 Prisma integrated amplifier. The remote can also be used to control other Primare components, such as a CD or network player. The Prisma App, Google Home App, and your Apple iOS or Android device will be required to operate certain network sources, features and functions.

Prisma App: The Prisma app (for Apple iOS 8.1+ and Android OS 4.3+) allows for the configuration and control of virtually all functions of the I25 Prisma integrated amp, duplicating and enhancing the front-panel and remote control systems, over your local area network from your compatible mobile device.

• Configuration & Setup: The app allows you to customize inputs and select media severs, as well as enable or disable inputs, auto-sense input selection, choose between fixed or variable volume output, and adjust individual input gain. You can also manage zones to connect with other Prisma devices round your home. In addition, you can adjust balanced, startup volume, maximum volume, and mute level. You can even adjust the front-panel display's illumination level and enable auto-standby and wake-up on input signal.
• Control & Playback: From the app you can control input selection, play/pause, previous/next track, random/repeat, volume adjustment and mute. You also have access to stored music files on your local network devices. You can search by artist album, track, title, or even playlist. The app also display track information such as source, duration, bitrate, bit-depth, sampling rate, format, and file size.

IR Input/Output: The IR input (3.5mm) and IR output (3.5mm) can be used with an optional IR repeater system (sold separately) and compatible Primare products.

12V Trigger Out: The 12V Trigger output (3.5mm) allows the I25 Prisma integrated amp to switch on other devices, such as the Primare DD35 CD transport.

RS232 Port: The RS232 port allows you to connect the I25 Prisma integrated amp to a third-party home automation control systems, such as Crestron (sold separately).

Front-Panel Display: The units front-panel display indicates source input, volume level, and other menu settings. The Front-panel display also shows song/artist/album information (no album art). You can adjust the brightness of the display; set it to High, Mid, Low, or Off. There is also an Auto-Dim function that automatically dims the display after 1, 5, or 10 minutes of no user interaction.