Gemtune gs-01 hifi tube amplifier review

It is perfect for vocals natural and sweet , strings, pipes and jazz. If you would like a tube amp with balance tone, putting it in your living room to enjoy the pure and clean music with a glass of wine during your leisure time. GemTune GS-1 is the one! Recommend to use Lineout jack.

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• The 10 Best Vacuum Tube Amplifiers
• GemTune GS-01 Class A Integrated Hi-Fi Tube Amplifier with Tubes, EL34BX2,6N9PX2,5U4CX1
• Gemtune GS01-M Class-A Integrated Hi-Fi Vacuum Tube Amplifier w/ Tube 2XEL34B 2X6N9P 1X5Z3P/5U4C
• Best Tube Amp under $500
• The Gemtune GS01-M Tube Amplifier Review
• Best tube amplifier
• Best Stereo Amplifiers in 2021
• Review: Yaqin MC13S Stereo Integrated Amplifier
• GemTune Reviews Analysis

WATCH RELATED VIDEO: Nobsound 6P1 Tube Amplifier Review

The 10 Best Vacuum Tube Amplifiers

That is a pretty good test of the visual distortion. And the frequency response test in the post before it was done well too. They show the performance of that single ended circuit, and that output transformer. Please take the time to read if you want. Those who already know this will not need to, but some who know less will learn something.

The output tube not only has to drive the speaker, but it also has to drive the low impedance of the output transformer at low frequencies. The low inductance and consequential low inductive reactance is is characterized by the little wobble you see on the downward slope of the sine wave. Part of the wave shape wobble is caused by the phase of the 2nd Harmonic versus the fundamental frequency. The inductive reactance is 2X at 80 Hz, versus what it is at 40 Hz.

The transformer impedance is higher, and now you can see the 2nd harmonic distortion of the tube notice that the top of the sine wave is fatter than the bottom of the sine wave. But, you still see the fat top and narrow bottom of the sine wave caused by the 2nd Harmonic. That is because the 2nd Harmonic of the tube Hz is beyond the bandwidth of the output transformer.

Therefore, the 2nd harmonic Hz of the tube does not come out the output transformer. A 1kHz square wave would show if there is any downward slope of the top and upward slope of the bottom of the square wave indicating the attenuation of lower frequencies.

One more thing: It seems like the power transformer has enough laminations to power 2 output transformers. But the power transformer has to work at 50 or 60 Hz AC, and its I and E laminations are interleaved with no air gap.

The output transformer I and E laminations are not interleaved, and they have an Air Gap between them, and there is DC on the primary winding. All of that reduces the inductance and therefore the inductive reactance, and the tendency to saturate at low frequencies.

With the equipment that you have, you have done a good job of testing. If you use a larger signal, the distortion will be increased. And at Hz, the signal may be attenuated even more relative to Hz due to high frequency slew rate limiting. But I bet nobody wants to hear music at Hz at such a high power level.

Originally Posted by LongRoad. Measure the distance between the grill holes protect the lamps. Boyuu a10 mm x 70mm These amps are like brothers, maybe this part will suit you.

I also do not like the grill lamp, The amplifier looks like a big mousetrap. Attached Images FullSizeRender 1. Originally Posted by Fdlima. Frequency response Results:. See the results in the Excel table. The recent schematics in this thread still have a glaring mistake. The Dual Triode input tube has a floating grid, pin 4.

That will affect gain, distortion, etc. The fix is to connect pin 4 to pin 1. Whether you are using a PCB or point to point wiring, you need to check those connections. If you want to, you can use two grid stopper resistors, 1k Ohms each, one on pin 1, and one on pin 4, then tie the other ends of the grid stopper resistors to the volume control wiper that is also connected to the k Ohm grid resistor. Yes the boyuu A9 schematic doesn't show that. What is the advantage of using the 1k resistors?

If there is any tendency to oscillate, or if there is RF floating around, it reduces both of those at the input stage. Most find that they are not necessary. I have experienced some tendency to oscillate when I had an amplifier that had the plates tied together, and the cathodes had separate self bias resistors, but they both had bypass caps, so the cathodes were also effectively tied together for AC and RF frequencies.

If you do decide to bypass the cathode resistors, it would be a good idea to install grid stoppers. Attached Images Mods for A9 from pdf. JPG BB code is On. Smilies are On. Forum Rules. All times are GMT. The time now is PM. Resources saved on this page: MySQL User Name.

Stay logged in? Mark Forums Read. Please consider donating to help us continue to serve you. Page 79 of Last ». Thread Tools. View Public Profile. Find More Posts by navydiver. Attached Images. FullSizeRender 1. FullSizeRender 2. Send a private message to LongRoad. Find More Posts by LongRoad. Send a private message to Fdlima. Find More Posts by Fdlima. Send a private message to VictoriaGuy. Find More Posts by VictoriaGuy. Send a private message to gregas.

Find More Posts by gregas. Mods for A9 from pdf. Chinese amp A9 Schematic Mods Rev1. Posting Rules. Similar Threads. EL34 tube amp that needs work on. EL34 vs. Frequently Asked Questions Did you forget your password?

GemTune GS-01 Class A Integrated Hi-Fi Tube Amplifier with Tubes, EL34BX2,6N9PX2,5U4CX1

It is perfect for vocals natural and sweet , strings, pipes and jazz. If you would like a tube amp with balance tone, putting it in your living room to enjoy the pure and clean music with a glass of wine during your leisure time. GemTune GS-1 is the one! Recommend to use Lineout jack. HTRP would like to take this opportunity to welcome you to our site.

Gemtune GS01-M Class-A Integrated Hi-Fi Vacuum Tube Amplifier w/ Tube 2XEL34B 2X6N9P 1X5Z3P/5U4C

Imagine an amplifier capable of producing a warm, rich tube sound; capable of easily handling the bass, midrange and treble sounds, no matter what your personal taste in music. There is an almost magical quality to the sound when listening to music through a good quality tube amp. If you are looking for a tube amp that has the power and depth to enhance your listening experience then you will want to know about this amp. Gemtune, has recently begun branching out into other consumer electronics, however it originally started out producing tube amplifiers and other such audio equipment. With its founding experience in tube amplifiers, it is no wonder that Gemtune manufacture quality amplifiers at a reasonable price. While this amp is not a lightweight it will fit on a sturdy shelf. Input is via left and right RCA jack sockets. The Gemtune GSM Tube Amplifier will produce the rich, warm tones that you would expect from a good quality tube amplifier. One person who had purchased and reviewed this amp online, even went so far as to compare it to a Conrad Johnson amp that they once had.

Best Tube Amp under $500

If you are familiar to music and all the things that come along, you may know about the reigning of the solid state amplifiers. They ruled for many years, in many shapes and several features that would blow your mind off, but lately, we are watching how tube amps win back the market once lost. This combination gives you a purer signal path and you can handle the signal better and constantly. As the components are fewer, they give for fewer elements in a circuit to degrade the signal, muddle or distort the sound.

The Gemtune GS01-M Tube Amplifier Review

Posting Komentar. All Rights Reserved bose cinemate digital home theater speaker system. It is perfect for vocals natural and sweet , strings, pipes and jazz. If you would like a tube amp with balance tone, putting it in your living room to enjoy the pure and clean music with a glass of wine during your leisure time. GemTune GS-1 is the one! You can read the opinions of those who previously used it.

Best tube amplifier

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Best Stereo Amplifiers in 2021

Using the first article to get our creative juices flowing I found some more well written well designed amplifiers using tubes and semiconductors. The design link below shows various permutations to feed a high voltage swing with little distortion to an emitter follower output stage. High safety margin, for a W amplifier using 4 x MJE and 4 x MJE output transistors in the output, the input to the current amplification circuit is through a capacitor DC block from the voltage amplifying pentode and an LM op amp for stabilising the DC offset at the output, removing the need to apply manual adjustment.

Review: Yaqin MC13S Stereo Integrated Amplifier

RELATED VIDEO: UPDATE on Product Review Gemtune GP-01 300B Single Ended Class A Integrated Amplifier

Color: 1x Akku mAh. Color: GS Classic version. This is the first tube amp I ever bought and was worried I may not like it. I own many vintage stereos and I now listen to my gemtune Amp all the time.

GemTune Reviews Analysis

JavaScript seems to be disabled in your browser. You must have JavaScript enabled in your browser to utilize the functionality of this website. Valve or Tube amps are made to be played loud - any musician will tell you! They sound amazing when you absolutely crank the life out of them and you start to feel those tubes screaming. There's simply nothing else like it. Until recently, however, the only way to achieve this tonal sweet spot was to turn the volume ALL the way up and rock out - not ideal if you value your hearing. Although cranking tube amps right up and letting rip feels and sounds amazing, it's not always practical when you're at home.

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