Douk Audio X1 Bluetooth Tube Amplifier 160W Review

The Douk Audio X1 is a desktop vacuum tube amplifier priced at $139.99. It combines an MM phono stage, a line-level preamp and a class-D speaker amplifier in one chassis, and the maker describes it as a full upgrade over earlier models in every respect.

Power comes from a TDA7498E amplifier IC, quoted at a maximum of 160W + 160W into 4Ω, paired with a 32V/5A power supply. Douk Audio says that is enough to drive most home passive speakers. Inputs are Bluetooth 5.0 on the QCC3034 chip with aptX and aptX-HD support, a stereo RCA line input, and an MM phono input that converts a turntable signal to line level and amplifies it, so a record player can connect directly. Outputs include speaker terminals and a low-frequency output for adding an active subwoofer to build a 2.1 system.

The tube section runs JAN5725 tubes, which the listing says improve detail, transparency, richness and tone compared with the 6J1 series, especially on vocals. The sockets are pluggable, so tubes can be rolled to alter the sound. An NE5532 op amp handles pre-amplification and tone control, with treble and bass knobs plus a bypass function for the original sound and a bass boost switch for heavier low end. Inside, the maker points to a double PCB design with the phono circuit fully integrated, Siemens capacitors, an NEC relay and pure copper gold-plated terminals, all in a custom aluminium case with blue and orange tube lighting.

Specifications

How it compares

The nearest match is the Douk Audio T6PRO TPA3255 Tube Amplifier review, at the same $139.99. Both pair JAN5725 tubes with an amplifier chip and offer a subwoofer or pre-out for a 2.1 system. The X1 page lists a TDA7498E chip rated 160W+160W into 4Ω, an MM phono input with a GND port and a 32V/5A supply in the box, with THD of 0.5% and SNR above 90dB. The T6PRO page lists a TPA3255 chip with a 300W per channel maximum, but its table gives 78W+78W into 4Ω with the 32V/5A supply and 120W+120W with 48V/5A, so the two ratings are closer than the headlines suggest. The T6PRO page prints THD of 0.01% and SNR of 102dB or better, adds LDAC and a super-bass control, and has no phono input; its $139.99 option ships without an adapter and its 32V/5A bundle costs $159.99, $20.00 more than the X1 with its 32V/5A supply included. Choose the X1 for a turntable and a supply in the box, and the T6PRO for the cleaner printed figures.

If you need USB, optical or coaxial inputs, the ST-01 PRO Bluetooth Tube Amplifier review ($109.99, $30.00 less) rates 100W+100W into 4Ω and lists PC-USB, optical, coaxial, U-disk and RCA inputs with Bluetooth 5.0, but no phono input. The Nobsound DA3 Bluetooth Tube Amplifier review ($189.99, $50.00 more) is rated 35W x 2 into 4Ω with two 6J1 tubes, Bluetooth, optical, coaxial, U-disk and two RCA inputs and a headphone jack, with THD of 1% and SNR of 70dB on its page. The X1 has the highest headline rating of the three and is the only one with a phono stage, but it lists no digital inputs besides Bluetooth and no headphone output.

Shipping, returns and warranty

• Shipping: Douk Audio's current shipping page says orders are generally processed no later than the next business day and arrive in 2-8 business days, with duties, taxes and customs fees included in the checkout price unless noted otherwise.
• Older shipping terms are still online: airmail at 10-25 days for parcels under 2 kg, DHL, UPS or FedEx at 5-8 days above that, and a line saying the store is not responsible for import duties. Check the delivery estimate and any duties at checkout.
• Returns: ask within 30 days of delivery and wait for approval before sending anything; an approved return has to ship within 7 days. Items need all packaging and accessories and no excessive wear, or the store can refuse them or refund part of the price. Refunds go to the original payment method after inspection.
• Not refunded: original and expedited shipping, duties, taxes and customs charges, unless the law requires it or the store made the error. The return page does not say who pays return postage, and the older refund page excludes mistaken orders and change-of-mind returns from free after-sale service.
• Warranty: 24 months from purchase for manufacturing defects, with free repair, a replacement unit and free shipping both ways for covered repairs. Drops, liquid, DIY repairs, lightning, extreme temperatures and misuse are excluded (partial fees may apply), and damage from weak packing on the way back may not be covered. The older refund page still says 1 year.
• Seller: the site is run by Shenzhen Anba Technology Co., Ltd (Shenzhen, China) and HONGKONG LONGSHENG Import and Export Trading Co., Limited (Hong Kong); support is by email at [email protected]. These terms cover orders placed on doukaudio.com; other sellers apply their own.

For this product, the page has a 'Shipping to' selector (US, UK, EU, AU, Other) and shows Free Shipping, 2-8 Days Arrival, 30-Day Return and 2-Year Warranty badges near the price; the store's option data prices 'Other' at $148.99 against $139.99 for the other four.