IWISTAO 2X12W HIFI Tube Amplifier 6N1x2 Preamp 6P1x4 Class A + 4 Inch Fu...

IWISTAO 2X12W HIFI Tube Amplifier 6N1x2 Preamp 6P1x4 Class A Pull Push Amplifier Circuit plus HIFI 4 Inch Full Range Speaker with Red Cabinet

Testing and demo a pair of 4 inches full Range speaker with vacuum tube ...

Testing and demo a pair of 4 inches full Range speaker with vacuum tube amplifier

How Dusk mask is made by automatic machine?

How Dusk mask is made by automatic machine?

• Safety protection, dust filtering up to 95.
• Keep healthy and breathe at ease. Three-dimensional cutting, high-adhesion fit to the face design, better sealing, safer to wear.
• 4-layer protection, high filtration efficiency.
• Plastic aluminum nose clip for better fit. It is more comfortable to wear and prevents air from flowing from the side of the bridge of the nose, giving you double protection.
• Ultrasonic high-quality spot welding, firm and anti-detachment, effectively protect the filter layer.
• A functional nose pad design that prevents fogging and isolates the outside air.
• Triple structures design for long-time wearing and comfortable skin.
• Elastic band ear hook for easy stretch wear.

More details, please find https://www.iwistao.com/collections/mask/products/10-pcs-bag-dust-mask-pm2-5-haze-kn95-adult-child-protection-riding-mask-fish-mouth-or-three-dimensional-folding

IWISTAO HIFI 3 Inch Full Range Speaker 2 x 15W Whole Aluminum Casing

IWISTAO HIFI 3 Inch Full Range Speaker 2 x 15W Computer speaker Whole Aluminum Casing


It is All-aluminum casing and Ultra-thick material with precision CNC machining by independently developed. Choose a large magnetic 3 inch HIFI full range speaker unit, exquisite and compact, beautiful and generous

The system includes HIFI music player from iPhone 5s plus a tube Bluetooth 5.0 CSR8675 decoder plus a pair of FU50 tube amplifier, then plus a pair of 3 Inch Full Range Speakers.

More details, please find here
https://www.iwistao.com/collections/hifi-speakers/products/iwistao-hifi-3-inch-full-range-speaker-1-pair-2-x-15w-computer-speaker-whole-aluminum-casing-audio?variant=14136068341875

IWISTAO HIFI 3 Inches Full Range Speaker Solid Wood Labyrinth Structure for Tube Amplifier

IWISTAO HIFI 3 Inches Full Range Speaker Finished 1 Pair Solid Wood Labyrinth Structure for Tube Amplifier

This speaker cabinet is made of solid wood. Built-in a labyrinth structure, it can enhance the low-frequency radiant energy, make low-frequency dive deeper, effectively overcoming insufficient bass of commend full range speaker cabinet, make the speaker cabinet the full-frequency be more full and rich.


As you know, the greater the material density of the speaker enclosure, the less the vibration produced by the enclosure. Solid wood is more reflective of sound than other materials, and tightness of the wood is higher, and the sound can be effectively expressed by the vibration of the air inside the box. We often say that the sound of wooden speakers is warm, in fact, the word warm means the balance of tri-band that are low, medium and high frequency; if the frequency is too low or too high, it will make people feel uncomfortable. The advantage of wooden speaker is that its playback effect is good, the vibration of the sound inside the box is stable, and the sound effect will be balanced and full.


Its magnetic circuit system of speaker unit adopts the neodymium iron boron rare earth strong magnetic structure plus short circuit copper bushing, which improves its performance of music details from starting point. The choice of the cone is more exhaustive, when it is determined to use aluminum as its sound basin, it begins to this thin aluminum material has been studied in various ways. If it is thicker, its rigidity will be better, but its resolution is poorer, in contrast if it is thinner, the resolution is better, but its rigidity will be poorer. Finally, it was decided to use a thin aluminum to improve the rigidity from the shape and depth anodizing treatment. The aluminum treated in this process is almost the same as ceramic. So, the sound quality is also going to a new level, whether it is bandwidth, details and transients have an ideal performance!

More details, please find https://www.iwistao.com/products/iwistao-hifi-3-inches-full-range-speaker-finished-1-pair-solid-wood-labyrinth-structure-for-tube-amplifier?variant=31415207002227