Douk Audio H5 Tube MM Phono Preamp with Sub Out Review

The Douk Audio H5 is a tube MM phono preamp priced at $89.99, designed to visually and sonically complement the company's A5 amplifier while adding tube warmth, a turntable input, tone control and subwoofer integration to a compact stereo system.

For vinyl, the MM Phono input accepts moving-magnet turntables and engages a 20Hz high-pass filter that helps tame unwanted rumble from record warp or turntable vibration, keeping playback cleaner and steadier. There is no MC option - moving-coil cartridges need a step-up device. The RCA Line In covers DACs, CD players, streamers and computers, so the H5 also works as a straightforward tube line preamp when you are not playing records.

Outputs are where the H5 goes beyond a basic phono stage: two RCA outputs can feed two amplifiers or powered speaker systems at the same time (they carry the same signal simultaneously), and a dedicated SUB Out uses a single RCA connector with a 180/250Hz low-pass filter to hand low frequencies to a powered subwoofer and reduce boomy overlap with the main speakers. The volume knob controls both RCA outputs and SUB Out together, while bass and treble controls shape the main outputs only. The tube stage is tuned around GE-4BZ6 tubes with a 180V drive for a smooth, warm character, and only the same 4BZ6 type should be used for replacement. A socketed NE5532 op-amp can be swapped for OPA2604, OPA2134, LM49720 or MUSES02, and shielded tube power with a 4th-gen relay helps reduce interference and switching noise.

Specifications

How it compares

The H5 is the closest match to the Douk Audio P7 Tube Phono Preamp with HPF review ($109.99, $20.00 more): both take MM phono and RCA inputs, use a 20Hz high-pass filter that works only on the phono input, give ±6dB of bass and treble and carry swappable NE5532 op-amps on a 12V supply. The P7 swaps the H5's subwoofer output and second RCA pair for a true balanced XLR output beside its RCA pair, uses PSVANE ECC83 tubes where the H5 uses GE-4BZ6, and prints lower distortion (THD+N of 0.03% on phono and 0.1% on RCA, against the H5's 0.15% and 0.5%) and a higher line SNR (109dB or better against 104dB).

The Ampapa A1 Mini 5654 Tube Phono Preamp review ($129.99, $40.00 more) adds a headphone amp (125mW at 32 ohm) to bass and treble controls like the H5's, but has no subwoofer output and lists no filter, and the Douk Audio T3 PRO Tube MM Phono Preamp review ($59.99, $30.00 less) is a mini MM phono stage with two 6A2 tubes and a gain switch, with no tone control or high-pass filter listed. Choose the H5 for an MM turntable with a powered subwoofer and a rumble filter; choose the P7 for balanced outputs; choose the A1 for headphones.

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 lists shipping from US, UK, EU, AU and China and shows Free Shipping, 2-8 Days Arrival, 30-Day Return and 2-Year Warranty badges near the price.