Jan 1, 2026, FifoPiQ7 III New Launched!

Introduction
FifoPi Q7 is the new flagship of the FifoPi re-clocker family. It successfully achieves so far the best ultra-low jitter and ultra-low noise performance by using many next generation technologies. Such as the well-reputed 1-bit multi-stages discrete re-clockers, low EMI leakage discrete isolators, programmable constant FIFO delay time and automatic adaptive depth control, Continuous clock mode, 32bit high performance FIFO engine architecture, enhanced wide bandwidth power supply filtering networks and so on.

Launched in 2026 with cutting-edge technologies, the New FifoPiQ7 III leverages the flagship to the next higher level by optimizing the performance of full range digital music playback up to DSD1024/PCM768.

FifoPi Q7 III would be an ideal core solution for audiophile DIYers to improve the sound quality of their high-end DAC and re-clock streamer transport projects.

Features and Specifications

• Synchronous clock mode for the best possible sound quality
• New generation 32bit FIFO engine architecture with 64Mb large FIFO memory
• Equipped with well-reputed 1- bit discrete 3 stages low noise re-clockers to ensure so far the best I2S/DSD signal quality. The output I2S/DSD signals are almost perfect in terms of signal integrity
• Built-in discrete/optical digital isolators to ensure best isolation performance and lowest EMI leakage
• Support I2S input/output up to 768KHz
• Support native DSD input/output up to DSD 1024
• On board DoP decoder is capable of Raspberry Pi’s native DSD playback over GPIO up to DSD256
• Programmable delay time from 0.1 seconds to 1 second
• The Advanced variable depth FPGA algorithm adjusts the FIFO memory automatically according to the music frequencies to hold same delay time constant across different audio formats and frequencies.
• New continuous clock mode makes it possible to keep the current output clocks no change until a new music frequency is locked. This feature can eliminate the pop sound of a DAC to a lowest possible degree at the moment of music start/stop/change even it doesn’t have a MUTE control
• Can use a MonitroPi/Pro as the FifoPiQ7 controller
  
• Two upgradable/swapable XO sockets mounted low phase noise local clocks (XOs or OCXOs, with/without OE pin) support frequencies from 5.6448MHz to 89.304MHz and for both 44.1 and 48 sampling frequency families
• Works with SinePi to make use of external high quality sine clocks
• Two separate DC inputs to provide both clean power to the FiFoPi Q7 and the optional Raspberry Pi power via GPIO
• 3.3V ultracapacitor or LifePO4 battery power supplies can be fed directly to the clean side of FifoPiQ7
• Optimized wide bandwidth decoupling networks improve more to the power supply performance
• Non-isolated GPIO connector is designed to install DAC controllers, MonitorPi or other RPi accessories in isolating mode without affecting the signal quality of the isolated outputs
• FIFO memory works as clock isolator across two clock domains to make I2S/DSD signals synchronized to MCLK of XO oscillators.
• Has three output groups: U.FL coaxial connectors, GPIO and the AUX GPIO . They are all independent from each other
• No need for a Linux driver. Can also be used for Raspberry Pi free applications
• Can work with all kind of digital audio sources such as USB, S/PDIF, I2S/DSD over HDMI and many more
• Internal hardware 16 to 32bit lossless convertor
  
• Equipped with dedicated output connector to control power supplies with SYNC mode
• Works with new HdmiPoProII using a dedicated connector and SH1.0 cable for Mute/DsdEn signals
• Pi side power supply J3 can tolerance with both 5V and 3.3V
• Bit-perfect and audiophile friendly

FifoPiQ7 III New Features

• Optimized for digital music up to DSD1024/PCM768 to ensure a full range best isolating/re-clocking performance
  
• Discrete precision clock drivers are utilized to deliver near-perfect signals to the DAC/Transport for the ultimate sound quality. All outputs are optimized for 50-ohm impedance, guaranteeing peak performance with U.FL cables and controlled transmission lines.
• Offered in three variants: the FifoPi Q7 III Zero (#1E), the FifoPi Q7 III 45/49 (#1D), and the FifoPi Q7 III 90/98 (#1F)
• A slightly larger PCB size with silkscreen markings that are enhanced for legibility
• Features upgraded noise filtering networks in the power supply sections
• A dedicated I2C connector, J12, has been added to supply control signals directly to the DAC when connecting through U.FL cables, enabling GPIO-free applications.
• 100% compatible with FifoPiQ3 and previous FifoPi Q7 family

P/Ns and ordering information

#1D. FifoPi Q7III with 45.1584MHz and 49.1520 MHz FemtoMck XOs pre-installed

#1E. FifoPi Q7III with 90.3168MHz and 98.3040 MHz FemtoMck XOs pre-installed, this option will support DSD1024 and PCM768 directly

#1F. FifoPi Q7III without XO installed

FifoPiQ7 III's near-perfect clock output waveform measurement results

The following graph captures the actual measurement of the FifoPi Q7 III's MCK output after a 6-inch U.FL cable (#14). This waveform represents the exact signal that a DAC or downstream device would receive from a FifoPiQ7III.
The waveform exhibits near-perfect signal integrity: it is completely free of ringing and overshoot and almost no noise at both high and low levels. It would be very hard for other devices to achieve or even close to this quality benchmark.

Notes: 

1. The FemtoMck clocks are brand new. They need break-in time to achieve optimal phase noise performance.  Please don't take serious listening before continuously run-in for more than 24 hours. Further improvements can still be developed over operating time.

2. The new FemtoMck clocks are pretty tall. You may need a GPIO Spacer if the board on top doesn't have a window opening for the clocks.

New FifoPiQ7 III User's Manual

FifoPi Comparison

FifoPiQ7 II User'smanual 

Document Folder

https://github.com/iancanada/DocumentDownload/tree/master/FifoPi/FifoPiQ7

Accessories:

#21B input adapter for FifoPi. Makes FifoPi working independently for any project as a universal FIFO re-clocker.