GKDC GK57-D Carbonized Plate Vacuum Tube, Direct Replacement for 300B / 4300B / VV32B, CT Grade Ultra-High Vacuum Hi-Fi Audio Triode for Single-Ended

Core Tech & Advantages 

The Gaoke GK57-D is a high-performance directly heated triode vacuum tube designed as a direct drop-in replacement for 300B, 4300B and VV32B audio tubes.

1. CT medical-grade ultra-high vacuum production process delivers ultra-low internal gas residue, boosting electron conduction efficiency for purer audio signal and wider dynamic range.

2. Classic carbonized anode plate, iconic craftsmanship of top-grade 300B tubes, improves heat dissipation and power dissipation capability.

3. Zirconium inner anode coating features strong high-temperature gettering performance, continuously absorbs residual gas inside the tube to stabilize cathode emission and greatly extend vacuum tube service life.
   
   Hi-Fi Sonic Performance 

Midrange: Sweet, Thick & Vocal-Focused

Inherits the legendary midrange advantage of 300B vacuum tubes, delicate, smooth and full of musical emotion. Carbonized plate brings extra density without losing transparency, perfect for human vocal and string instrument playback.

Treble: Silky Smooth with Rich Air & Stage Detail

Ultra-high vacuum eliminates harsh treble glare, delivers extended, soft high-frequency response with abundant harmonics and hall reverb. Outstanding spatial sense and sound stage restore authentic live music atmosphere.

Bass: Solid, Loose & Great Transient Elasticity

Solves the weak low-end defect of original 300B tubes, stable bass foundation with sufficient low-frequency energy same as VV32B, clear texture and tight elasticity.

Overall Tonality: Balanced Full-Range Rich Tube Warmth

Features ideal linearity and pleasant even-order harmonic distortion, retains classic ethereal 300B tube sound while upgrading wider frequency response and solid low end. Ideal for single-ended Class A tube amplifiers, matches classical, jazz, vocal, pop and rock music playback.
 

Product Summary
Gaoke GK57-D carbonized plate triode combines CT ultra-high vacuum, carbonized anode and zirconium gettering three core technologies. It is not only a cost-effective replacement vacuum tube for 300B series, but also an upgraded audiophile tube that balances accurate sound reproduction and touching musical warmth for vintage & modern hi-fi tube amplifiers.

For delivery time:
Please contact us for checking the delivery time before placing your order.

Generally, we will dispatch the items within 7 days upon order confirmation; some items may need 20~25 days to get ready for delivery, then we will try our best to dispatch as soon as possible, or we will contact you and offer advice.

 
For Bulk order:
If you would like to place a bulk order, please contact us for better price and better delivery cost.