Man Man Ren Shen Lu Duet from 6P1 Parallel Tube Amp plus IWISTAO 4 Inch Bamboo Labyrinth Speaker

Man Man Ren Shen Lu Duet from 6P1 Parallel Tube Amp plus IWISTAO 4 Inch Bamboo Labyrinth Speaker

The Tube Amplifier is Single-ended Class A output, adopt tube 6P1 in Parallel, and its output 2x6.8W. Its rectifier used tube 5Z4P.

Vacuum tube 6P1 is a special audio tube, which is used to produce a small single-ended Class A tube amplifier with a mellow natural sound, sweet and warm, especially when listening to the vocal performance is very rich, very good acoustic performance, transparent and you will not be tired even listening for a long time. Use it to listen to the human voice, piano, strings, zither, etc., more natural, never tired.

Its design is simple and the elegant, suitable for placing in the study, bedroom ..., so relax, and you can truly feel the music mood, listen to the voice of the soul.

Specially, we have assembled one pair VU meters, which is warm and beautiful when it lit with the tubes...

And, a pair of bamboo labyrinth speaker are matched to this tube amplifier..

👇 👇 👇

IWISTAO Tube Amplifier Single-ended Class A 6P1 Parallel Power Stage 2x6.8W Natural Sweet

IWISTAO HIFI 4 Inches Full Range Labyrinth Speaker Cabinet Bamboo 2x60W Max 70Hz-22KHz 89dB

How to handle unbalance for left and right channel of your HIFI audio system

How to handle unbalance for left and right channel for your HIFI audio system

Someone had asked our technician what he could do when the audio system happened unbalance for left and right channel.We summarized it the tips as below and hope it help you to solve the problem.

Before checking and adjustment, Please make sure the tubes had been put right position and get well contact between pins of tube and tube bases all.

1. Firstly, please check if the left and right are unbalanced when volume potentiometer is rotated to any positions.

1). only if the time around the beginning of the volume potentiometer, imbalance problem should be caused by the volume potentiometer.

2). If at any position, it is imbalance, it should be other questions.

2. Sitting down / standing up in the middle position of your listening area, does not move (the previous position does not move), so let your families quickly replaced the left and right speaker cables from the outputs of the amplifier to change, the cable ends of speaker do not move temporarily

1). If the same thing happened still, it should be the speaker and cable led to the problem. Then, please exchange the speakers and don’t move cables, if there is an offset for volume, it should be caused by the speaker, and it is probably caused by tremble speaker. If there is no offset, please check the cables.

2). If you replace the speaker cables and it happened, it should be caused by audio amplifier or signal sourcing.

3. At this time, please exchange your RCA signal cable (up and down to exchange)

1). If there is a shift, then it should be the signal source. Please check your audio signal sourcing.

2). If not a shift, then it should be caused by amplifier or signal cable, then please check the amplifier. For tube amp, please exchange the tubes to find out the problem.

4. There is a possible problem is the speaker placement, please try it.

What Is Single Ended Class A Tube Amplifier?

What IsSingle Ended Class A Tube Amplifier?

Audio amplifiers in mass production typically use an integrated circuit to amplify the audio signal. Even though modern audio amplifiers reproduce audio signals with less signal distortion than their predecessors, some audiophiles prefer the "warm" tone a tube amplifier produces when it reproduces an audio signal. Except integrated circuit to amplify, many audio and power amplifiers sold for personal and commercial use contain electronic devices called transistors. Transistors came about as an intended improvement upon an older technology—the vacuum tube, used as an amplifier component since the early 1900s.

One common type of vacuum tube - the triode - is commonly used to create tube amplifiers. A triode is so named because it has three electrical connections: the grid, the plate, and the cathode. A triode can receive an alternating current - or AC - signal through the triode grid connection, and can amplify the signal by application of direct current - or DC - electrical energy across the triode plate and cathode connections. A Class-A amplifier operates at an efficiency level between 25 and 50 percent. Therefore, a triode-based Class-A amplifier requires a high-voltage (100-volt or more) DC power source to provide power to the amplifier. Unlike transistor-based Class-A amplifiers, a triode-based amplifier also requires a separate direct-current (DC) power supply for a cathode heater. Without the cathode heater activated, a triode-based amplifier will not work.

While many transistor-based amplifiers are capable of reproducing and amplifying a signal without noticeable signal distortion, some audiophiles prefer the slightly distorted signal that a tube amplifier provides.

There are two types of tube amplifier output circuit: Push-pull output circuits that are wired so that the output current is split and runs in parallel, the other is single-ended output stages that are not split and run in a linear fashion. Single-ended tube amplifiers can generate more power from less current. Single-ended tube output circuits are used in both audio and instrument amplification. There is less distortion in a single-ended amplifier because the output currents do not cross over.

A high cost effective and high quality single-ended tube amplifier had been hit the market by WistaoTechnology since two years ago. There are several models to be selected for customer. They are Class A, pure tubes amplifier, whose pre-amplifier adopt 6N3J tubes, and power stage adopt EL34B tubes, also its rectifier adopt 5Z4PJ tube, and the chassis is made of traditional black or Mirror Stainless Steel with silver. More details, you can visit the links:

Single-ended Pure Class A Tube Amplifier 6N9 preamp tube EL34 power amplification 5Z4PJ Rectifier (Model: WVT2016) with traditional black.

Single-ended Pure Class A Tube Amplifier 6N9 preamp tube EL34 power amplification 5Z4PJ Rectifier (Model: WVT2016)

Lighting of Single-ended Pure Class A Tube Amplifier 6N9 preamp tube EL34 power amplification 5Z4PJ Rectifier (Model: WVT2016)

Single-ended Pure Class A Tube Amplifier 6N2J Preamp EL34 Power Amp 5Z4PJ Rectifier with Mirror Stainless Steel Chassis Silver (Model: WVT2018)

Single-ended Pure Class A Tube Amplifier 6N2J Preamp EL34 Power Amp 5Z4PJ Rectifier with Mirror Stainless Steel Chassis Silver (Model: WVT2018)

Application of Single-ended Pure Class A Tube Amplifier 6N2J Preamp EL34 Power Amp 5Z4PJ Rectifier with Mirror Stainless Steel Chassis Silver (Model: WVT2018) by customers

Application of Single-ended Pure Class A Tube Amplifier 6N2J Preamp EL34 Power Amp 5Z4PJ Rectifier with Mirror Stainless Steel Chassis Silver (Model: WVT2018) by customers

History of Tube Amplifier

History of Tube Amplifier

Before transistors were invented in 1947, all amplifiers ran off of vacuum tubes. The invention of the simple valve or tube is credited to John Ambrose Fleming, who created it while working for the Marconi Company in London, 1904. It was called the diode due to its dual electrode structure, which conducted electricity in one direction only. Lee De Forest then added a third electrode, creating the Triode, which he called the "Audion." It was the first electronic amplifying device. Its first audio application was boosting the signal of telephones. In the 1950s, valves began being used for music (and later TV) amplification.

WISTAO HIFI Tube Amplifier WVT2012

In the early days of the electric guitar, general-purpose audio amplifiers were used. But as the instrument grew more popular, specialized tube guitar amplifiers were designed. In the 1960s, as rock and roll became the dominant popular music, manufacturers experiment with many different types of tube amplification, seeking variations in tone and greater flexibility of volume and gain (the signal drive which creates distortion). Many different types of tubes were used, with many different characteristics; some types included KT66, EL34, and KT88. EL34 and KT88 tubes are still in production today.

Tube EL34

Pins of EL34

Tube amplified sound is generally considered to be superior and preferable to transistor amplified sound, especially for the electric guitar. The tube sound is generally much warmer and more organic sounding than solid-state. Tube amplifiers are also far more responsive to the dynamics of a guitarist's playing (how hard she hits the strings). Tube amplifiers, when played hard, produce some desirable grit that solid state amps do not. The tube amp is the easiest way to get a classic sound out of your guitar.

The main drawbacks of tube amplification are expense and durability. Tube amplifiers are much more expensive than solid state amplifiers, as solid state transistors are much cheaper to produce than tubes. Guitarists' demands for the more "authentic" sounding tube amps also drive up the price. Tube amps are also more fragile than solid state amps (the tubes can break) and are sensitive to heat and cold where solid state amps are not. Tube amps are also much heavier than their solid-state counterparts.But with process development of tube manufacturing, its durability has been improved significantly and working time is up to ten thousands hours or above. Also the manufactures are able to provide cheaper tube amplifier with high quality.And, a protective shield is added to amplifier for pretect the tubes.

The WISTAO is one of the most popular tube amplifiers. It has a clear, chiming, clean sound, and sounds particularly pristine when paired with a guitar. The Twin is a combo amp, in that its tube amp circuitry is housed in the same cabinet as the speakers, with the tubes hanging down in back. WISTAO is a company that makes a number of excellent tube amps that are more affordable.

There is a  tube amplifier with pure tubes, which adopt 2pcs 6N3 tube as preamp, 2pcs EL34B as power amplifier, 5Z4 as rectifier. The unit adopts horizontal design, compact structure, symmetrical and reasonable layout, fine workmanship, and matched with special tube shields, which is overall elegant, dignified.

WISTAO  Tube Amplifier 6N3 * 2 preamp EL34 * 2 Power Amplifier 5Z4 Rectifier SRPP Circuit Pure Tube Amplifier 2 X 8W

Lighting of WISTAO HIFI Tube Amplifier 

Internal circuit adopt tube rectifier, 6N3 tubes are used as pre-amplifier whose sound is very sweet, and using well-known classic SRPP circuit connection; Power amplifier adopt two EL34B tubes, strong driven, transparent sound, higher resolution , rich tubes style.150W power supply transformer

Protective shield of the tubes 

The  tube amplifier has two inputs, and a signal input switch on front panel beside volume control; two groups of 4 or 8 ohm output is six large copper gold-plating terminals with crystal cover; power input with 110V/220V dual power input selection, let the machine be widely able to use in different countries, different supply voltages to meet different needs.

Back view of WISTAO Tube Amplifier 6N3 * 2 preamp EL34 * 2 Power Amplifier 5Z4 Rectifier SRPP Circuit Pure Tube Amplifier 2 X 8W

If you like it, please click WISTAO Tube Amplifier 6N3 * 2 preamp EL34 * 2 Power Amplifier 5Z4 Rectifier SRPP Circuit Pure Tube Amplifier 2 X 8W

The product specifications is below.

1. Rated output power: 8W + 8W

2. Frequency response: 20Hz-25 KHz

3. Total harmonic distortion: <1% (@ 1KHz)

4. Input Sensitivity: 500mV-2000mV

5. Input impedance: 100K ohm

6. Output impedance :4-8ohm

7. SNR: ≥ 88dB

8. Size (W * H * D): 360mm * 180mm * 260mm

9. Weight: 11.5kg