IWISTAO Blog is the official platform of IWISTAO HIFI MINIMART, dedicated to high-fidelity audio and DIY electronics. We focus on tube amplifiers, output and power transformers, speaker enclosures, and Bluetooth audio technologies, including HiFi Bluetooth speakers, headphones, and tube-based acoustic systems. The blog shares product insights, technical knowledge, and practical guides for audiophiles and audio builders worldwide.
Deep and rich man's voice from The Ballad on a Boat
The deep and rich man's voice from The Ballad on a Boat, sourced from CD player.
And the power amplifier is 300B single-ended vacuum tube amplifier, which adopts the famous Audionote circuit. Its power transformer and output transformer are carefully wounded by British Red Bull iron core. The advanced HI-FI design without large loop feedback makes the sound delicate and lingering, and rich musical.
Its preamplifier used vacuum one pair tube 5678, and the signal to tube 6H8C, then drive tube 300B.
It built with pure hand scaffolding process, and high quality output transformer and power transformer, choke coil with Red Bull Sands silicone steel sheet.
The baffle horn speaker utilized old farm implements and old bed frames to make, like as baffle and horn speaker. And, the speaker unit adopt 8 inches full range one.
We used a mini tube amplifier to drive it, the music source came from a wall hanging CD player
As a result, we got a better effect from this pair special speakers.
Adjustable Crossover Point Volume Adjustable Crossover for HIFI Horn Super Treble Unit Full Range Speaker
This is an ideal four stages adjustable crossover/6-segment level-adjustable supersonic crossover. The level uses a precision resistor to form an L-shaped attenuation line, which ensures impedance stability. The frequency division parameters are as stable and reliable as textbooks, and crossover level is adjustable in six stages. It can be connected to any 8 ohm super treble unit, even if it is high sensitivity super treble unit, it can be attenuated to a reasonable level. Choose to use step switching to ensure that its balance is left and right at all times.
In particular, it is important to note that the sensitivity of super treble unit is preferably about 5 dB higher than the matching speaker to complement the speaker!
If the super treble unit is 4 ohms, a 3.9 ohm 5 watt non-inductive resistor can be connected in series, and then connected to the adjustable crossover, it can have the same effect.
IWISTAO Discrete Components MM/MC Phono Stage FET Amplifier for LP Phono Split-type AC110V/220V HIFI Audio
The phono preamp contains two types of phono amplifiers, MM and MC, which can be adapted to most users' vinyl record players on the market.
Choose fully discrete components to build the circuit, easy to fine-tune the various data parameters.
The main amplifier circuit adopt Field Effect Transistor (FET), which is convenient to reduce the sensitivity of the components to temperature changes and improve the distortion.
Choose pure class A circuit to form discrete component amplifier circuit, effectively reduce harmonic distortion and improve sound effect.
The phono equalization circuit does not use the feedback circuit of the conventional integrated IC circuit, but chooses the attenuation type, whichever is the natural characteristic of the timbre.
The two aluminum chassis are the same size, both are 133mm wide, 63mm high, and 250mm deep.
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