Delivering The True Potential Of USB Audio
Ultra-low noise 5V USB Battery power supply, 10G USB data Regeneration circuit and -20 dB passive noise filtration all in one device
You’ve heard it a thousand times garbage in, garbage out. But, what if it were possible to take a compromised signal, strip away the garbage (noise and timing errors), and pass along a darn near perfect data stream? That’s exactly how we designed The LightSpeed USB Revive.
Better USB signal makes for better USB listening
While we at LH Labs believe that better USB cables help deliver a better musical experience, we know that consistent, measurable improvements call for an even stronger solution. LightSpeed Revive combines a USB data stream regenerator and 5V battery power supply in one box to deliver the quietest, most accurate USB signal possible to your DAC. By replacing the source device’s noisy 5V USB power supply with an ultra quiet battery supply (or external low noise 5V DC linear power supply) LightSpeed Revive feeds your USB DAC the best 5V power possible. No high frequency noise. No voltage fluctuations. Nothing to impede the flow of music. However, a better power supply is only part of the story. The second key element in LightSpeed Revive is our proprietary 10G bandwidth USB data signal Regeneration and Revive (R+R) stage. This circuit receives the USB high speed differential pair signal from the computer or music stream device, completely new USB data stream only to regenerate a completely new USB data stream signal to feed the USB DAC. The throughput and bandwidth capability of this signal regeneration circuit is 10 Gbps, making it fully compatible with both the USB 3.0 and USB 2.0 standards. The Regeneration and Revive stage features a carefully chosen IC with true 10G PHY capability powered by an ultra-low-noise power supply. This supply relies on precision voltage regulators and dozens of high frequency decoupling capacitors to remove any noise or distortion that often lead to issues with signal integrity. Even the multi-layer printed circuit board has been painstakingly laid out to maintain 10G bandwidth. Distances between each and every differential pair signal have been carefully calculated to avoid any potential for impedance mismatch.
Do You Have The Time?
The icing on the Regeneration and Revive stage cake is the high-precision crystal oscillator that is used to create a fresh digital reference clock for the USB data signal coming from your source device or computer. Every newly generated USB data stream gets “re-clocked” by this low jitter clock, which is 100 times better than the clocks you will find inside most computers.
Not Just Ones And Zeroes
There’s a common misconception that DACs and digital cables have an easy job. After all, they simply determine whether a signal is a one or a zero before sending it on its way. Right? Not quite. In wide-bandwidth data applications, the ones and zeroes must be bundled into packets that are passed at blindingly high frequencies through send/receive chipsets and across cabling. Every small impedance mismatch, and every bit of power supply noise that travels along with the data (music) creates errors that can cause audible problems. Here’s a sample “eye pattern” that shows the USB data pretty much buried in noise and interference:
After LightSpeed Revive regenerates the USB data stream, removing noise from the 5V power supply, your USB DAC receives a signal that looks more like the image below. This cleaner eye pattern results in a more accurate signal received by the DAC. Still Ones and Zeroes, just BETTER Ones and Zeroes!
The Proof Is In the Listening:
After logging some serious time listening to the LightSpeed Revive in our systems in the LH Labs and at home, we can say that it is exceeding our expectations. Some feedback we’ve noted so far: “…sounds like you are listening to a different system!” “ The improvement in focus is dramatic.” “…better timing, better sound stage, and this guacamole is amazing ” (Guacamole was NOT improved by LightSpeed Revive, but it was pretty tasty)
The Cure for Noise and Glitches
Have you ever heard clicking noises from a USB DAC? Or does your computer have trouble recognizing your DAC at all? It could be due to noisy USB power, or poor USB port power management. LightSpeed Revive uses its own 5V power supply (either from external Linear Power Supply or its on-board 3100mA Lithium Ion Battery) so it’s not relying on your PC to do the job. We’ve got your USB transmission issues covered.
What Makes LightSpeed Revive Special?
While there are a few well-designed USB data transmission related devices on the market, most of them only focus on the issue of noisy USB power. Either they use purely passive filters that only eliminate some of the noise in the upstream USB 5V power line, or they use a Linear Power Supply to generate clean 5VDC power. Either way, most of them do nothing with the USB data stream. A very few others add a USB 2.0 hub IC in the USB data stream signal chain to repeat the USB signal. This can sometimes help, but there simply is not enough bandwidth in these USB 2.0 hub devices to create an accurate regenerated USB3.0 compliant data stream. LightSpeed Revive’s wide bandwidth circuitry has enough headroom to completely and accurately regenerate any 480 Mbps USB 2.0 audio package. Pair LightSpeed Revive with a proper impedance matched USB cable (such as one of our LightSpeed USB cables) and prepare to be amazed! Another advantage of LightSpeed Revive’s robust processing and wide bandwidth is that we can offer TWO USB A output connectors that are simultaneously active. You could connect a DAC plus an ADC (10Gps up to the PC, 10Gps from PC to DAC) or even two DACs into the same computer or music streaming devices if your source device supports multiple simultaneous outputs. If using two outputs, please note that the music signal on both USB-A output connectors is identical. Both feature the same regenerated signal and share the same ultra low noise 5V supply.
What Do I Get With My LightSpeed Revive?
- One LightSpeed Revive: aluminum case (145mm x 67mm x 13mm); Input is USB ‘C’ jack (Yes, it is capable of USB 3.0 signals as well.), Output is via two USB 3.0 ’A’ connectors,which are fully compatible with your USB 2.0 audiophile cables too. Power input is a Micro USB “B” connector, so you can use almost any USB charger.
- One 6-inch male/male USB C to USB A 3.0 cable, pre-tested to confirm compatibility with LightSpeed Revive, and is still compatible with the USB 2.0 output port on most computers and streaming devices (LH Labs will launch the LightSpeed USB C to USB A within a few months as adoption of USB C increases)
Join the Discussion
Join our community and give us your feedback and help us make the best audio system possible.
There’s an old saying, “It takes a community to raise a child.” We totally take this to heart. In fact, we’ve built our entire business model on its premise. By incorporating community involvement into our product design and development, we’re able to meet the needs of our customers in ways other companies envy. We encourage you to join the community. Please join the discussion in the LightSpeed Revive for up-to-the-minute conversation about this project.
They say we’re a bunch of smug, tech-happy audiophiles high on great sound with piles of gear that we swap in-and-out at every whim. We’re not smug.
We’re like you; we love high-end audio gear, especially the kind of high-performance digital gear we make in Roseville, CA. In fact, we were the first company to tell the world, “24/192 doesn’t cut it. If you want digital audio to sound like its analog counterpart, you have to start at 32 bits and 384 kHz.” We were laughed at for the first couple of years. We carried our 75 pound Da Vinci DAC to every trade show the world offered. Airlines hated us. Our chiropractors loved us. And once enough people had listened to our R2R groundbreaker, we were vindicated. We’ve been featured in all the major audio industry publications and have even been featured in Forbes, The Wall Street Journal, and Entrepreneur. But we’re not letting it get to our head. Instead, we’ll keep plowing forward, blazing new trails, and coming up with some seriously awesome stuff.
How Do I Connect My LightSpeed Revive?
Q1: What is the difference between LightSpeed Revive and AudioQuest Jitterbug, or other USB powerline/signal filter?
A1: Our design approach is totally different than a passive filter like the AudioQuest Jitterbug. Passive filters will help, but if the original signal is already marginal (from either computer or music streamer), passive filters often do no good.
Q2: What is the difference between LightSpeed Revive and ToneUpAudio Regen?
A2: As with our LightSpeed 10G cables, we believe that in order to properly generate and transmit the USB signal and maximize signal integrity, you need to have much higher bandwidth than is strictly required in the USB specification. LightSpeed Revive’s high speed PCB material and meticulous high speed differential pair routing is designed to allow simultaneous 10 Gbps upstream and 10 Gbps downstream.
Q3: How can I switch LightSpeed Revive on/off?
A3: LightSpeed Revive has an automatic detect circuit on its USB input. Once that USB input goes live we will instantly turn the Revive ON.
Q4: Can I use LightSpeed Revive with my Geek Out, Pulse DAC or Vi DAC?
A4: Of course, and we’d love to hear your impressions! Please visit our forum page to sound off!
Q5: Could I use my LightSpeed 10G/2G/1G with LightSpeed Revive? How about other audiophile USB 2.0 cables?
A5: Of course. Simply connect these USB cables to any one of the USB 3.0/2.0 “A” connectors and start to experience the difference. Q6: How do I use LightSpeed Revive with my Pulse LPS (Linear Power Supply)? A6: Please use one standard USB charging cable, from Pulse LPS’s super clean 5V output to LightSpeed Revive’s charging port (Micro USB B port)