Designed in collaboration with StradiTube. The new production PP3/250 is engineered to original Mazda U.K. specs, its directly heated, single triode unlocks greater output power, deeper soundstage with a holographic presentation. Every note in your music comes alive with unparalleled instrument separation revealing inner details with stunning transparency.

Exclusively crafted for Woo Audio, the B4-style tube base features matte black Bakelite for exceptional heat resistance, strength, and electrical insulation. Durable gold-plated pins ensure optimal, corrosion-free connectivity for a life-time of reliability.

These PP3/250 tubes are fully compatible with standard PP3/250 specifications. Woo Audio worked closely with StradiTube to refine the narrow glass design ensuring seamless compatibility with the WA24 20th anniversary edition headphone amplifier.

Elevate your listening experience and rediscover your music collection.

For WA24 units shipped before March 3, 2025, a factory upgrade is required for compatibility with the new PP3/250 tubes. This upgrade is free with the new purchase of these tubes; though customers are responsible for two-way shipping costs. The stock tube (3A/109E) remains compatible after the upgrade. Units shipped after this date already include the upgrade and do not require it.

• Ladder type Frame Grid

• Material of minimizing filament end-loss

• Triple mica structure to serve as an anti-microphonic feature

• Electrophoresis filament coating

• Dual Getters

• Eco-friendly paper packaging

• Woo Audio is an authorized StradiTube reseller

• Stradi PP3/250 Tube matched quad (4) tubes

• Eco-friendly paper packaging

• WA24 20th Anniversary Edition

• For WA24 units shipped before March 3rd 2025, a factory upgrade is required to ensure amplifier compatibility with these PP3/250 tubes. The upgrade will be provided to you free of charge. Your cost is the tubes plus a 2-way shipping. Units shipped after this date will already include the necessary upgrade. The upgrade will not affect the amplifier's compatibility with the stock tubes (3A/109E).