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Nobsound P10 PRO HiFi Portable Tube Headphone Amplifier Review

A battery-powered portable tube headphone amp using Raytheon JAN6418 direct-heating tubes, with 8-10 hours per charge over USB-C and swappable tubes and op-amps behind a visible top window.

3.73.7 out of 5 starsUpdated October 14, 2026
$109.99Price checked October 14, 2026
Check price at Douk Audio
Nobsound P10 PRO HiFi Portable Tube Headphone Amplifier

Our verdict

The Nobsound P10 PRO is a rare thing — a genuinely portable tube headphone amp at $109.99. Raytheon JAN6418 tubes deliver the warmth, two 600mAh batteries run it for 8-10 hours per USB-C charge, and both tubes and the op-amp can be swapped for different voicings. The visible top window and CNC aluminum chassis give it a premium feel. Accept the direct-heated tube quirks — a brief ringing on power-up and no fast chargers — and it is a compelling travel companion.

Best for
Travelers and commuters who want real tube warmth from a battery-powered headphone amp and enjoy swapping tubes and op-amps
Skip if
You need a completely silent power-up every time or only own a fast charger — direct-heated tubes ring briefly and fast chargers can damage the amp
Check price at Douk AudioHow we research

The Nobsound P10 PRO is a portable tube headphone amplifier priced at $109.99. Driven by batteries, it pairs with phones, laptops and computers for travel, commuting or home listening, using Raytheon JAN6418 direct-heating tubes to deliver the warm sound tubes are known for.

Battery life is a strong point: two 600mAh lithium batteries provide up to 8-10 hours of uninterrupted music, USB-C charging allows recharging while listening, and a full recharge from off takes just 2.5-3 hours. The batteries are replaceable, so you can carry a spare set for longer trips.

The design invites experimentation. The tubes sit in swappable sockets — the defaults can be replaced with CK6418 or CK548DX after removing glue from the pins — and the NE5532 op-amp can also be rolled for a different character. A top window lets you watch the JAN6418 tubes glow while you listen. WIMA capacitors and a CNC-machined aluminum chassis speak to build quality, and the package includes cables, rubber bands and a screwdriver for quick setup.

The maker documents the tube quirks plainly: because the JAN6418s are directly heated, a brief ringing noise may occur for 25-35 seconds after power on/off or physical shock, which fades as the tube stabilizes. Use a standard 5V DC charger rather than a fast charger, use two batteries of identical brand, model and capacity, remove the batteries if the amp will be unused for a while, and operate within 8-50°C (46-122°F).

Shipping is worldwide with free and expedited options, and cost varies by country. This amp is light, so it ships airmail in an estimated 10-25 days unless expedited service is chosen. Note that batteries in the package can affect courier options depending on destination. Import duties and customs fees are the customer's responsibility. Free 30-day returns with a full refund and a 1-year warranty apply to all items, excluding orders placed by mistake, man-made damage or misuse, subjective change of mind, and anything else outside the warranty terms.

What we liked

  • Real tube sound on the move: Raytheon JAN6418 direct-heating tubes deliver warmth that solid-state portables do not
  • 8-10 hours of playback from two 600mAh lithium batteries, with USB-C charging that even allows recharging while you listen
  • Tubes and the NE5532 op-amp are both swappable, so the tonality can be personalized over time
  • The top window shows the glowing JAN6418 tubes and the internal components at work
  • Durable CNC-machined aluminum chassis with WIMA capacitors, plus practical accessories included

Worth noting

  • Direct-heated tubes can make a brief ringing noise 25-35 seconds after power on/off or physical shock — the maker describes this as normal behavior
  • Only use a standard 5V DC charger; fast chargers should be avoided to prevent damage
  • Batteries must always be replaced as a pair of the same brand, model and capacity, and should be removed if the amp will sit unused for a while

Questions before you buy

Why does it make a noise when switched on or off?

The JAN6418 tubes are directly heated. During power-on/off or physical shock, vibration or tapping, a ringing noise may occur for 25-35 seconds. The maker states this is normal and fades as the tube stabilizes.

What charger should I use?

A standard 5V DC power supply. Avoid fast chargers, which can prevent damage to the amp. USB-C charging also allows you to recharge while listening.

Can I replace the tubes and batteries?

Yes. The default Raytheon JAN6418 tubes can be swapped for CK6418 or CK548DX (remove glue from the pins first), and the batteries are replaceable — but always use two batteries of the same brand, model and capacity, and remove them if the amp will not be used for a while.

What are the shipping and warranty terms?

Worldwide shipping with free and expedited options; light orders ship airmail in about 10-25 days. Import duties are the customer's responsibility. Free 30-day returns for a full refund and a 1-year warranty apply, excluding orders by mistake, misuse, change of mind and anything outside the warranty terms.

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