DAC + Headphone Amplifier - Tone2 Pro combines the ESS ES9038Q2M with x4 OPA1612 operational amplifiers that deliver superior audio quality.
High Performance - Up to 32bit 384KHz sample rate, bit-perfect DSD512, and -118dB THD+N (line-out).
Hardware MQA Decoding - XMOS XU216 processor for full MQA decoding, enabling next-gen "original master quality" web streaming and audio playback.
Balanced RCA - Next-generation "balanced RCA line-out" with 3-pin output, sets a new interface standard for the Hi-Fi industry.
Linear Power Supply - Tone2 Pro has a second USB-C (I2S) port that supports 5V linear power supplies for ultra-clean signal-to-noise ratios.
Tone2 Pro is our second-generation Tone Board from Khadas that incorporates a variety of user feedback from our first-gen product, the Tone1. ESS ES9038Q2M DAC has been paired with four powerful OPA1612 operational amplifiers and three buffer amplifiers. This 3-stage amplification pathway enables Tone2 Pro to drive a wide range of demanding audiophile-grade headphones with impedances of up to 150 ohms. The OPA1612 was selected because it provides superior audio quality and excellent distortion characteristics; THD + noise is below 0.00008% throughout the audio range (20Hz to 20kHz).
Other additions to the Tone2 Pro include a 4.4mm balanced headphone jack in addition to the standard 3.5mm single-end jack. The Tone2 Pro's aluminum enclosure incorporates a hybrid digital/analog volume control knob, allowing you to rely entirely on analog signal attenuation for accurate sound reproduction. With not one, but two USB-C ports, you can connect a 5V linear power supply to the second USB-C port whilst having USB-C data on the first for excellent power-noise isolation. Finally we've added an industry-first balanced RCA line-out. These novel RCA ports have three signal-pins instead of two, yet retain the same size and form factor as regular RCA ports.
The latest addition to file format support is MQA decoding. The onboard XMOS XU216 processor enables bit-perfect, hardware-native, USB class II, asynchronous "unfolding" of MQA data for both web streaming and local high fidelity audio playback, enabling future-proof "original master quality" audio reproduction just as the artist intended, but at reasonable file sizes and streaming bandwidth requirements.
Files & Documents:
What's in the Box:
x1 Tone2 Pro
x1 USB-C Cable (Type-C to C)
x1 Instruction Manual
x1 Warranty Card
Accessories (sold separately):
- Balanced RCA to XLR-3 Male Converter
- Balanced RCA to XLR-3 Female Converter
QUESTIONS & ANSWERSAsk a Question
can you plug this in the iPad Pro (and iPhone) and use it directly?
iPad Pro can drive Tone2 Pro directly via standard USB C to C cable.While iPhone required a dedicated lightning to USB-C cable that with OTG feature, be note that the standard lightning to USB-C charge cable will not work
Does the USB port support version 3.0 or 3.1? also, I2S USB port support a 5v linear power supply up to how many amps exactly?
Tone2 Pro featured with USB 2.0. Both USB3.0 and 3.1 are compatible with USB 2.0 and works out.
The Tone2 Pro with 620mA 5V maximum while playing PCM 768KHz 32bit songs, so any 5W LPS works.
Is this an AMP + DAC combo? And if i were to connect this to my PC, I will use the primary USB- C for signal and the secondary for power?
Yes the Tone2 Pro is a DAC + Headphone AMP. The primary USB-C supports both power and data from your PC, Laptop, Tablet or Smartphone. The secondary USB-C is for connecting 5V linear power supplies that will bypass the primary USB-C power.
Can the USB-C input be used with the USB-C output of my phone?
Yes, Tone2 Pro can be powered by your smartphone over USB-C.
There is a Generic version and VIM version? Or is there just one version?
Tone2 Pro is a finished product, that has an MQA license and will be sold with a proper aluminum case. Tone2 will be a bare board suitable for docking with VIM SBCs.
Does the volume knob also control the output of the RCAs?
Nope, the volume knob only controls the hardware volume of the headphone jacks. Hackers may rewire the board to allow the knob to also control the RCA volume.
What connection cables will you be providing in the package?
Only a 1m length USB-C to C cable.
Is there a version for the VIM3 also?
We will release the “Tone2”, which is a bare board version for VIM SBCs. Tone2 Pro will only be sold as a finished product due to the MQA license restrictions.
Will the sound quality be better than the Tone 1. I found the Tone1 lacked body, though the audio is very clean.
We will ensure that the performance of Tone2 Pro is higher than the Tone1. After formal tests are conducted with specialized equipment and test benches, we tend to leave this question to the reviewers who will review Tone2 Pro in the coming days. Qualitative sound-quality is highly subjective, with some people preferring a clean and flat output, whilst others prefer a warmer bass and a punchy high-range with more depth and space. We may decide to re-tune the sound-profile based on reviewer feedback.
Coax is input or output?
Coaxial input. Originally we designed Tone2 Pro to support both Coax IN and OUT via the balanced RCA jack. You can use a standard RCA cable for Coax IN, and a balanced RCA cable for Coax OUT. But Tone2 Pro is likely to only support the Coax IN feature when it ships with the pre-installed firmware. The XMOS XU216 processer is already maxed-out to achieve all features such as MQA, SPDIF OUT and PCM768. We may release special firmware to support Coaxial OUT for users who want to use the Tone2 Pro as a USB to SPDIF adapter, just note that a special cable(balanced RCA to single-end) is required to support the SPDIF Coaxial OUT.
When will it be launched?
Pre-orders will begin on 16th December.
Will it completely unfold MQA for Spotify?
Yes, full MQA decoding for both the MQA Core and MQA Renderer.
What is the voltage level of the RCA balanced connection, is it the standard 4V?
Yep, 4.0Vrms for balanced RCA mode, and 2.0Vrms for standard RCA mode (single-end).
Where can I get balanced RCA plugs or balanced RCA to XLR-3 cables that are compatible with your balanced RCA connectors?
What about balanced RCA to XLR-3 cables, connectors to make those cables?
We will produce an adapter or cable for existing products with XLR-3 connectors: Balanced RCA to XLR-3 female adapter Balanced RCA to XLR-3 male cable We will also launch a balanced RCA cable when compatible products like Pre-Amp/Amp/Headphone Amps are available in the market.
This new one has headphone jacks for headphone listening?
Yes, we built-in a buffer stage amplifier to drive the headphones directly. They are connected with the hardware volume control, and each headphone has an independent amplification pathway. Headphone volume is independent from line-out.
What is the output power to drive headphones?
We will release the full specs in subsequent newsletters, you can check the specs for the further details then.
Is this designed to deliver better performance than the original?
Yep, sure thing. We will release the full specs in subsequent newsletters.
This new model is still a USB DAC that performs the same function as my original Tone Board?
Yes the Tone2 Pro is still a full-featured USB DAC, with the addition of a headphone amplifier.
Will Tone2 Pro be open source like Tone1?
You can be sure that Tone2 will be open source like the Tone1. However we’re not quite sure about Tone2 Pro due the licensing restrictions.
Any cables or adapters included to go from “balanced RCA” to more traditional XLR or 4.4mm?
Yes, we are planning a balanced RCA to XLR-3 converter cable, check this blog post: khadas.com/balanced-rca
Do you ship globally?
Yes we do, just provide a valid shipping address and working handphone number for the courier.
Does Tone2 Pro support Bluetooth high-resolution input?
Yes the Tone2 Pro supports external bluetooth modules via the secondary USB-C port labelled I2S. Note that the pin-layout of the USB port is non-standard. Users can select the input source using the volume knob (rotary-push encoder). Input sources: USB Data, Bluetooth (via USB-C I2S port), and Coaxial S/PDIF IN
What’s the spec-difference between Tone2 and Tone2 Pro?
Tone2 = Tone2 Pro - Headphone Amp - MQA. The Tone2 Pro is based on the XMOS XU216, whilst Tone2 is based on the XU208 (which is also used on Tone1). The Tone2 will have balanced RCA connectors, just like the Tone2 Pro.
Will the Tone2 Pro be a development platform or an end-user product?
Tone2 Pro will sell as a finished product only. The MQA company does not allow us to sell any MQA products as bare/development boards to deliver better user experience. Khadas will develop & launch the Tone2 (not Pro) as a DIY Kit in the future, but without MQA support.
Does it allow you to set a custom filter to allow for DSP room correction?
If you have a 2 channel setup, you can use the Tone 2 Pro along with room correction software.
I hope this helps, thank you!
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.
If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact HiFiGo Support ( firstname.lastname@example.org ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to HiFiGo Support within 3 months of the date of shipping or before the courier archives the tracking information.
Option 1. Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way)
!!! Express Free Shiping on US$500+
The estimated time of delivery is usually 3-7 Days depending on the country. Includes detailed tracking and confirmation of delivery.
1.Kindly remind that we will deduct you the round freight before refund you if customer reject to pay the duty tax. (P.S. tripple freight for returning the product)
2.For some remote areas, there may be an additional charge of US$ 35. Your order shipping date may be delayed few days if the place is remote because we need find out proper carrier to send out to avoid remote fee, otherwise we will contact you for remote fee or order could be cancelled. If you are unsure whether your location is considered a remote area, we recommend contacting us to confirm.
3. Address characters should be within 30-40 letters.
Option 2. Premium ( 6-10days, All tax and Duty Paid)
All tax and duty are prepaid to carrier by HiFiGo before shipping, so you dont need to pay any tax or duty when you get it.
Note: Address characters should be within 30-40 letters.
Premium Available: France, Germany, United Kingdom, Italy, Spain, United States.
United Kingdom: https://t.17track.net/en#nums=YT2134221222009882
Option 3. Priority shippingIf we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by HiFiGo before shipping, so you dont need to pay any tax or duty when you get it.
Note: Address characters should be within 30-40 letters.
America (with all tax & duty paid, Free shipping on $100+ )
United States/: 1-2 Weeks, average 10 days
Europe ( with all tax & duty paid, Free shipping on $300+ )
1. France, Germany, United Kingdom, Italy, Spain : 1-2 weeks , avg. 10days.
United Kingdom: https://t.17track.net/en#nums=YT2134121272173175
2. Austria, Netherlands, Hungary, Portugal, Poland, Belgium, Czechia, Denmark, Greece, Ireland, Luxembourg, Slovakia, Sweden, Bulgaria, Finland, Slovenia,Latvia, Malta, Norway : 1-3 weeks, avg.2 weeks .
3. Croatia, Estonia, Bulgaria,Romania, Lithuania : 2-4 weeks,avg.3 weeks
4. Russia: 4-10 weeks
Switzerland: 1-2 weeks
Ukraine/Belarus: 3-5weeks,avg. 4weeks
Asia (with all tax & duty paid , Free shipping on $100+ )
Australia (with all tax & duty paid, Free shipping on $100+ )
Registered Airmail service
We have stopped the normal registered airmail service due to the extremely long delivery times which made us unable to guarantee the delivery of your order before a certain date. Due to these circumstances and lack of tracking information. We've decided to not offer this shipping option. We appreciate your understanding.
If you chose Express (DHL/UPS/Fedex etc) : You are responsible for paying taxes and duties. But we usually declare an item at a lower value , leave us a message with the desired value if you want.
If you chose Priority service marked with tax and duty paid: All tax and duty paid by Hifigo.
You can Track Your Order by clicking here.
Please note: It can take up to 24 business hours for your tracking number to become active. In some cases, It may take up to 3 business days to update.
Shopify supports only one currency that is US Dollars. On payment, it gets automatically transferred to US dollars. Due to the currency exchange rates fluctuating almost daily, the prices in other currencies on our store at HiFiGo is just for your reference. Final price might be a little bit higher or lower depending on the current dollar rate.
After you place your order, you will receive an email with your order confirmation.
After your order processes, you will receive another email with tracking information and you will soon be able to track your order.
1.All orders ship from our warehouse in China within 1-3 business days unless stated otherwise. Please allow 1-3 days of processing time. Some items may require a longer ship-out and/or delivery timeframe. We will notify you immediately about the expected delivery timeframe, with the option of canceling your order for a full refund.
2.We will ship the product with the correct power voltage selection and adapter according to your country in shipping address. If your requirement is different with your country standard, please email us.
Packaging samples for different sized items. All products that we have on our store are 100% genuine and comes with their original retail packaging from the brands. Please note that the package might get opened for checking at customs in your country to inspect the cargo. Due to this single reason, we can’t guarantee you get your shipment 100% sealed when you get it.
Why hasn't my order shipped yet?
Typically, it takes about 1-3 Business Days of processing time before we ship your order. We ask that you allow us 1-3 Business Days to process your order!
You will receive an email to confirm that your order has been shipped. So please check your inbox in 1-3 Business Days.
I've been looking to buy a music player Hiby R6 ( US$799) and I wanted to know how much it would cost shipping to My country Romania / Spain/ Germany/ Norway/ Japan /Austrialia etc ?
There are two shipping ways to your country:
1.Express shipping(DHL/UPS etc) with 3-5days arrive( $500 order free shipping), we could undervalue the shipping invoice for you in order that you could pay less tax or duty.
2. Priority shipping to EU/ US / CA/JP /AU / South Africa with all tax and duty paid. 1-3weeks. ( $ 100 order free shipping ). We suggest to chose this shipping way, it is steady, good tracking information and you dont need to pay any tax & duty.
I've received a tracking number for my order. Why is my tracking not working?
Although your order can "ship", sometimes the online tracking will not update until 24 hours later. Usually, expect to see updated tracking information on the next business day after you receive your confirmation email/SMS. We appreciate your patience.
How can I track my order?
- Simply click on this link here to be redirected to the order tracking page.
- Enter the tracking number found on your order confirmation email.
- You will see up-to-date shipping information about the status of your order.
If You Have Any Questions Or Concerns, Please Contact Us so that we can help you.
If the package shipped, can I reject to receive it?
First, kindly contact your local courier using the local tracking number.
If your parcel were to be in transit for at least 3 months, it may have been lost in transit.
For orders below $50USD, you may either opt for a one-time reshipment of parcel OR a full refund of the amount paid in cash via PayPal/Credit/Debit card.
For orders above $50USD, we will only process a 50% refund of your order paid in cash via PayPal/Credit/Debit card.
Customers are to bear the consequences and fees incurred, if the parcel was undelivered due to any of the following situation:
Wrong address or phone number provided by recipient
Recipient was uncontactable when courier company contacted
Refusal to sign for the package by recipient
Lost or damaged parcel because recipient opted for “no-signature delivery”
Refusal to pay for the local tax/processing fee by recipient
Refusal to provide supporting documents for custom clearance by recipient
7-Day DOA Product Guarantee
You will enjoy this guarantee if you receive a damaged, wrong or unusable item. Please contact us within 7 days of receiving the package for a return authorization.
Once the product has been returned to our designated address, we can ship you a new item for free (we will refund the shipping cost of your return), or you can opt for a full refund.
30-Days No Condition Returns
If you are not satisfied with your purchase and the product is still in brand-new condition, we can arrange a partial refund which will include the item price minus shipping costs. You will be responsible for paying the shipping costs and customs duty for returning your item.
If it is plastic sealed when you get it, it should remain plastic sealed. Some types of goods such as CIEMs and custom cables cannot be returned.
Please contact us within 30 days of receiving your order for a return authorization. (confirmed by shipping tracking history)
Return requests made within 7 to 30 days of the order being marked as delivered will be subjected to a 20% restocking fee.
Items such as earplugs/holsters/cables are not covered by this guarantee due to hygiene reasons.
We may refund you for the following reasons,
- Returned items due to the policy of returns once we get them.
- Order cancellation
- Other reasons.
If you paid by credit card, It will arrive to you within 7 working days usually. The time will depend on the bank handling time. If you pay by PayPal, It will arrive to you within a few hours. If you didn't get the refund during the above lead times, write us to check the reason.
The refunded amount may be slightly different from your original national currency payment due to Currency Exchange rates varying, HiFiGo is not responsible for the difference.
There may be a transaction fee deducted by your bank when the order is canceled or refunded fully or partially, HiFiGo is not responsible for this if your bank charges you any additional fee.
We only replace items if they are defective or damaged.
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged, refunded, or warranty.
How long is the warranty period?
HiFiGo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Desktop DAC/AMPs IEMs and Dongles: 1 years warranty
Cables and Adapters: 3 months warranty
(excluding carrying cases, ear tips, and other accessories)
Should the Product(s) supplied by HiFiGo prove defective because of improper workmanship or material as reasonably determined by us, HiFiGo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.
This warranty extends only to personal use & does not extend to any product that has been used for commercial use, rental use, or use that is not intended. There are no warranties other than expressly set forth herein.
THE WARRANTY DOES NOT APPLY TO THE FOLLOWING
- Damage due to user negligence, accidents, disassembly, waterlog, misuse, abuse, alterations or vandalism.
- Improper or inadequate maintenance.
- Failure to perform required preventive maintenance
- use not following the ‘User Guide’ or any additional safety, use, or warnings included in the product materials.
- Unauthorized modification or commercial use.
- Damage in return transit.
- Unsupervised use by children under 18 years of age.
- Accidents, abuse, misuse, improper installation, problems with electrical power, acts of third parties.
- Products that are altered or repaired by anyone not authorized by HiFiGo
- usage not following instructions accompanying the Product(s)
- failure to perform required preventive maintenance,
- weather conditions, lightning, fire, water, or any acts of nature
- Furthermore, HiFiGo is not liable for incidental or consequential damages of any nature resulting from the use of this product and any liability shall not exceed the purchase price of the product.
Disclaimer of Warranties - Except as set forth herein, HiFiGo disclaims any and all warranties and representations other than those explicitly specified in this contract; any warranties, if separately provided in writing, are extended only to the Buyer whose name is shown on this invoice/contract. Warranties do not cover product damaged by external causes, including accident, abuse, misuse, improper installation, problems with electrical power, acts of third parties, Products that are altered or repaired by anyone not authorized by HiFiGo, usage not following instructions accompanying the Product(s), or failure to perform required preventive maintenance, including but not limited to backups, problems caused by use of software, parts and components not supplied by HiFiGo, weather conditions, lightning, fire, water, or any acts of nature; HiFiGo shall not be obligated to provide any warranty service or obligations unless the customer has paid its invoices in full under this or any other HiFiGo invoice. HiFiGo shall have the sole discretion in determining whether the Product is covered under the warranty for labor and/or warranty for parts
Governing Law - This contract shall be governed and construed per the laws of the People's Republic of China. Buyer agrees that competent courts in the People's Republic of China shall have exclusive jurisdiction over any legal action concerning this contract. In the event of any dispute related to this contract, the prevailing party shall be entitled to reasonable attorney's fee and costs.
How can I Request a Warranty replacement or repair?
You must email our customer service email@example.com within the applicable warranty period with your order number and your specific inquiries. Please describe the problems that you encountered with as much detail as you can.
Can I cancel an order?
Once an order is placed, you have less than 24 hours to cancel it if it is not processed yet. Once the order processes and is accepted by our warehouse, you may still request cancellation, however, please know that cancellation at that stage is not guaranteed.
Can I return the products that I don’t like and get a refund?
You may request to return an item in the condition it was received if you change your mind. Some items may be returned for either money back or exchange subject to the following conditions. Our policy is within 7 days after receiving according to the tracking record. If 7 days after receiving have gone, unfortunately, we can’t offer you a refund or exchange.
- Any item returned must be complete with all accessories, hardware, manuals, or instructions, and in the same "new" condition as when it was when shipped to you. Please send us photos or videos of it.
- Any item returned incomplete or with physical damage such as scratches etc., excessive signs of use, or abuse will not be accepted for return.
- Any item returned will be evaluated upon receipt. Of course, we cannot give refunds on defective merchandise resulting from mishandling, misuse, tampering or improper use.
Can I exchange a product that I ordered?
We offer an exchange service if the items are in the following conditions. (*Except Non-refundable & Non-exchangeable items)
- Products must in “Good Condition” with no damage in any way.
- To exchange a product, the product must be available to purchase on Hifigo.com and its price must be higher or equal to the original order amount.
- The customer will have to pay the difference in price if s/he selects a product of a higher price.
- If you have purchased any items with any discount offered by a joint promotion or other promotional activities but the discount offer has expired at the time of the exchange, the discount shall not be taken into account. Discounts offered by companies other than HiFiGo shall be dealt with per the terms and conditions of the relevant companies.
What’s the process for canceling, returning, or requesting a refund?
Please email our customer service firstname.lastname@example.org with your order number and the reason for the return. Please pack the product carefully.
You must return an item in the same condition as it was received. You must also include, in the same condition as it was received:
- All packaging such as boxes, bags, and tags
- Accessories such as cords and remotes
- Certificates, manuals, and warranty cards
- "Free gifts" or bonus items
- All items included in a bundle
What are the items that can be returned?
We accept the following items for return only if they are returned in the same condition in which they were received, and the items should include all items that were in the original package.
We do not accept the return of CIEM products and custom cables. Defective products covered under warranty could be returned for servicing, but NOT for refund. If the returned item is used, damaged, or missing any parts, or is damaged during return shipping because it wasn't packaged correctly, we might provide a partial refund to account for the loss in the item's value.
When do I need to return the items? When is the deadline?
Items can be returned within 7 days of receipt of delivery according to the online shipping tracking record if you receive a damaged, different or unusable item.
Where do I ship the items so that I can get a refund?
If you want to ship back to us, please contact us at email@example.com.
When will I receive my refund?
In most cases, we will issue your refund within six business days after receiving and checking the returned item.
How much will I receive for a refund?
You’ll be refunded the amount you paid minus 30% of the MSRP which shall be deducted as a restocking fee. For example, if the MSRP is $100, we will refund you $70. If the item is returned without its complete original packaging (original box, foam padding, etc.), an additional 10% packing fee will apply.
Who can I contact, if I have questions about refunds or warranties?
If you have any questions, Please contact us at firstname.lastname@example.org.