---
product_id: 179130875
title: "R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver)"
brand: "willsenton"
price: "VT657507"
currency: VUV
in_stock: true
reviews_count: 13
category: "Willsenton"
url: https://www.desertcart.vu/products/179130875-r8-kt88-x4-tube-amplifier-hi-fi-integrated-vacuum-tube
store_origin: VU
region: Vanuatu
---

# Remote control + bias current display 3 tube types switchable (KT88/EL34/6550) Triode & Ultra-linear modes selectable R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver)

**Brand:** willsenton
**Price:** VT657507
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your sound game — tube rolling just got next-level!

## Quick Answers

- **What is this?** R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver) by willsenton
- **How much does it cost?** VT657507 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/179130875-r8-kt88-x4-tube-amplifier-hi-fi-integrated-vacuum-tube)

## Best For

- willsenton enthusiasts

## Why This Product

- Trusted willsenton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Sound Modes:** Choose Triode for rich detail or Ultra-linear for powerful bass impact with a simple button press.
- • **Smart User Experience:** Includes remote control, tube protection cover, and external bias current display for effortless operation.
- • **Handcrafted Build Quality:** Pure hand-welded scaffolding and premium transformers ensure durability and superior audio fidelity.
- • **Multi-Functional Amplifier:** Use as integrated, power, or headphone amplifier to fit any high-end listening setup.
- • **Versatile Tube Compatibility:** Seamlessly switch between KT88, EL34, and 6550 tubes for tailored sound profiles.

## Overview

The Willsenton R8 is a premium hand-crafted vacuum tube amplifier featuring interchangeable KT88, EL34, and 6550 tubes, delivering up to 45W per channel in ultra-linear mode. It offers selectable triode and ultra-linear modes for customizable sound, a robust build with high-quality transformers, and versatile connectivity including headphone output. Designed for audiophiles seeking rich, dynamic sound with the flexibility to fine-tune tonal character, it includes a remote control and bias current display for precision and convenience.

## Description

The model currently on sale is the New Model upgraded in December 2023. Features Pure hand-made, the whole machine is welded with scaffolding. Use a square power transformer specially developed for this machine. The output transformer uses two high quality wideband EI output transformers. The voltage amplification and boost stage uses a 6SN7 for power supply filtering. The voltage amplification stage and the push stage use two pairs of 6SL7 and 6SN7 tubes, respectively. The rear stage uses four KT88/6550/EL34 tubes for class AB push-pull power amplification. Triode and ultra-linear selection are available. External independent BIAS-ADJ current display header. External EL34/KT88 tube selection function, easy to replace different types of tubes, adding endless fun. Infrared full-featured remote control. Use thick silver plated signal leads. With pure post-level function, it can be connected to independent preamplifier signal input. Power on mute delay function (about 30 seconds). Select Japanese ALPS high-end motor potentiometer. Easy-to-install plug-in tube shield. Product parameters: FTC Power Output Rating: 16W + 16W (KT88 Triode) (8ohms,20HZ-20KHZ,THD 1%) FTC Power Output Rating: 30W + 30W (KT88 Ultra-Linear) (8ohms,20HZ-20KHZ,THD 1%) Output Power rating (not tested under the FTC standard): 23W+23W (RMS KT88 Triode) Output Power rating (not tested under the FTC standard): 45W+45W (RMS KT88 Ultra-Linear) Whole machine frequency response: 12Hz-40KHz (± 1.5dB) Harmonic distortion: 0.2% (1W/1kHz, rated output power less than 5%) Signal to noise ratio: 89Db (weighted by A) Input sensitivity: 320Mv (merged), 700Mv (Power stage) Input impedance: 100k Ω Input terminals: CD, AUX1, AUX2, PRE-IN Output impedance: 4 ohms, 8 ohms Headphone output impedance: 30 ohms to 300 ohms Power supply voltage:~120V ± 5% (50Hz) Whole machine volume: 400x390x200mm (WxDxH) Use vacuum tubes: 6SL7x2, 6SN7x3, KT88x4 Net weight: 26kg Power consumption of the whole machine: 280W

Review: Worth Every Penny - So let me start out by saying that this purchase was years in the making. I had seen several tube amplifiers that could use both EL34 and KT88 tubes and one in particular that also had triode and ultralinear operating modes. My end goal was to replace several tube amplifiers including my ancient yet beloved Dynaco Stereo 70 (ST70). It should be noted that several years ago I purchased a Yaqin MC-100 amplifier but my ST70 was simply better sounding so I sold it and started my search anew. For better or worse, I'm not a wealthy audiophile but I am a very good technician so I've been able to buy most of my audio equipment broken for pennies on the dollar and then over months or years, repair it as I acquire parts. This time however, I wanted something new so this was like buying a new major appliance since it cost the same as my washer and dryer. That notwithstanding, let me tell you about this amp. When the Willsenton R8 (R8) arrived, I was pleasantly surprised to find it was triple boxed. Given the weight of this amp is over 70 pounds it needed to be well protected for shipping and it's clear from the weight this is not cheap amp. My ST70 is light as a feather in comparison. One thing I found interesting is that it shipped with the tubes already installed but there was sufficient styrofoam and tape to keep the tubes in place. Nothing was broken and my poor body survived lifting it onto the audio stand (I still got it!). On the features front, the amp comes with a high quality machined aluminum remote. The remote has no power button but does have an oddly large mute button (huh?). The amplifier itself does not have a VU meter but features a large easy to use bias meter. Keeping with the quality theme, the power and volume buttons are machined aluminum with LED illumination (red for power and green for volume) as are the selector and TR/UL buttons. A tube cage is included and the vacuum tubes are Willsenton branded so clearly a lot of care was taken to continue the quality theme. Even without having heard a single note from this amplifier, I knew I had a beautiful piece of audio jewelry for my listening room. My first impression of the amplifier was positive when I turned it on and heard nothing after hearing the startup relay click on. No hiss, no hum, just silence. The amplifier defaults to triode mode when powered on and my first listen was Introit from Faure Requiem (Naxos). Playing through my Infinity Primus 363 towers, the opening pipe organ chord filled the room with power and authority rivaling some of the best tube amps I've heard and certainly better than any I've owned. About three weeks in, I had used the amplifier enough for the tubes to settle in and now there is a greater smoothness to the sound (it was never harsh) and I can easily hear a stark contrast between triode and ultralinear modes. It should be noted that I had a Yaqin MC-100 amp and the difference in the modes was barely audible. In comparison to my ST70, the R8 is a very different sound which is to be expected since they use both different types and brands of tubes and the ST70 uses tube rectification while the R8's rectifier is solid state. I cannot say that one is better than the other as I enjoy them equally. In conclusion, I must say that the Willsenton R8 is a fine amplifier. While it is by no means inexpensive, it is certainly a value leader as it is less than half the price of competitive "brand name" equipment while yielding uncompromising build and sound quality. While sound quality can certainly be improved (or diminished) by changing vacuum tubes, the buyer of the R8 can rest assured that the branded tubes that come with the unit are by no means a cheap add-on. I'm pleased to say that the engineering and care that went into the build and parts selection of this amplifier are worthy of the best brand names. Thanks for reading!
Review: Punches way above its weight for the money - Warning: Long Review Unboxed it yesterday. On delivery, it’s very well packed; box inside a box and foam all around. This is a heavy amp, easily 70 lbs, and that’s a testament to its 3 transformers- they’re potted and probably make up 3/4 of the weight. This is important because the quality of an amp’s sound has a lot to do with the quality of the output transformer. In this case, heavier is better. This amp is replacing a solid state NuForce STA 200, no slouch, and very well reviewed here (and everywhere). After reading many reviews of the R8, I decided to change the tubes right away. The “ Wilsenton” tubes are ok, but this amp really lends itself to tube rolling, so I purchased 4 Gold Lion KT88’s, 2 Tung Sol 6NS7’s (replaces the two on the ends of the amp; the one in the center doesn’t impact sound quality) and two New Old Stock (NOS) Sylvania 6SL’7’s. Granted, this is an investment, but the KT88’s will last 3000 hrs or so. Set up is pretty straight forward: input terminals for CD, Aux, and Pre-In, and 4 and 8 ohm 5-way speaker terminals. Everything’s rock solid- quarter inch steel plate, well-machined knobs, really quality throughout. On off on the left, and on the right, volume control, which glows red while the amp is soft-starting- this is a good feature. In 30 seconds it goes green and the amp is ready. There is also a selector for triode mode and ultra linear mode. Triode mode is less power, but better detail. Ultra linear gives you weight and bass. The KT88’s are serious tubes-you can certainly use the amp, once the light goes green, but it takes those tubes about an hour to come into their own. And furthermore, probably another 24 to 50 hours to really burn in. Initial impressions about 7 hours in: there’s definite weight and slam in UL mode. As things warm up, the soundstage is getting more and more 3D, and on some tracks, the speakers disappear altogether, and it feels like you’re just a few feet from a live stage. This will only get better as everything burns in. Bass sounds tight and solid—no bloom typical of some lesser quality amps. Highs are rolled off a bit but crystal clear. The midrange, that part of the sound spectrum we think of when we talk about that “tube sound” is really good this early on in its burn in. Try Nils Lofgren’s “Keith Don’t Go”, or Dire Strait’s “Private Investigations”— pretty amazing stuff. One thing to consider: this amp will very clearly reflect the quality of the material it’s playing. I have Tidal and Qobuz streaming, and the quality from track to track is obvious with this amp. I can heartily recommend this amp for its solid construction and its ability to draw you into the music. Consider upgrading the tubes, as they make this amp really shine. Associated equipment: Bluesound Node with LHY power supply, Jolida DSD tube DAC and assorted upgraded cables.

## Features

- The model currently on sale is the New Model upgraded in December 2023.
- One amplifier can used wiht tube EL34, KT88 or 6550, so, you can get 3 kinds of sound from different models tubes. The default matching tubes of this machine is KT88. If you need another 2 new sets of tube, please purchase in addition. There is a Red selection button on the Back of the amp to switch.
- Can be used as an Integrated amplifier, power amplifier or Headphone amplifier. Pure hand-made, the whole machine is welded with scaffolding.
- Triode and ultra-linear selection are available, which can be switched by the button on the amplifier. With a remote control,Vacuum tube protective cover,Fuse and an English manual.
- We recommend that you spend 100-300 hours to RUN-IN this amplifier to get a better sound. Generally, you could get a better and stable sound after 100 hours, and you could get the best sound after accumulating more than 300 hours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08133TH98 |
| Amplifier Type | Tube |
| Audio Output Mode | Triode, Ultra-linear, Integrated, Power, Headphone |
| Best Sellers Rank | #72,777 in Electronics ( See Top 100 in Electronics ) #444 in Audio Component Amplifiers |
| Brand | Willsenton |
| Color | Silver |
| Compatible Devices | Guitar, Double Bass, Keyboard, all |
| Connector Type | 3.5mm Jack or 6.35mm Jack |
| Customer Reviews | 4.5 out of 5 stars 296 Reviews |
| Enclosure Material | Silver |
| Item Dimensions D x W x H | 11.81"D x 19.69"W x 20.08"H |
| Item Weight | 26 Kilograms |
| Manufacturer | Willsenton |
| Material | Silver |
| Mfr Part Number | Willsenton R8 |
| Model Name | R8 |
| Model Number | Willsenton R8 |
| Number of Bands | 3 |
| Output Channel Quantity | 4 |
| Output Wattage | 45 Watts |
| Power Source | AC |
| Product Dimensions | 11.81"D x 19.69"W x 20.08"H |
| Sound Profile | Variable |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Willsenton
- **Color:** Silver
- **Compatible Devices:** Guitar, Double Bass, Keyboard, all
- **Material:** Silver
- **Output Wattage:** 45 Watts

## Images

![R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver) - Image 1](https://m.media-amazon.com/images/I/61kCPwWtBrL.jpg)
![R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver) - Image 2](https://m.media-amazon.com/images/I/61q9oF3iCQL.jpg)
![R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver) - Image 3](https://m.media-amazon.com/images/I/61I8Qm8XkJL.jpg)
![R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver) - Image 4](https://m.media-amazon.com/images/I/51SZOf3nFYL.jpg)
![R8 KT88 x4 Tube Amplifier Hi-Fi Integrated Vacuum Tube Amp with Headphone Output KT88，EL34 Replaceable (Silver) - Image 5](https://m.media-amazon.com/images/I/91l+k0CzPJL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: I noticed a big undesired distortion & undefined instruments on the middle ''woman in chains'' on the kt88 from my turntable, any hints as to why?**
A: Possibly a ground issue from the turntable? Are you running a seperate phono preamp?

**Q: I’d like to email the seller about tube selection, is there an address I could write to?**
A: youcanpickyourtubechoicewhenyouorder.

**Q: How can you get warranty service for this amplifier? The registration card is entirely in Chinese and the seller doesn't respond to emails.**
A: TIP: Before you click the button to make your purchase make sure the listing identifies Amazon as the shipper and not some 3rd party seller t that may or may not be located in China. Then if your paranoid about having a warranty you can add Ashurion warranty coverage. WARNING: If it ships from a 3rd part and not via Amazon you must work with the 3rd party to resolved an y issues like shipping damage or DOA.  Ships from Amazon - 
https://www.amazon.com/Willsenton-R8-Integrated-Amplifier-Headphone/dp/B08134V3VK/ref=sr_1_3?crid=3BV0I21TAWLWP&keywords=Willsenton+R8+KT88&qid=1661873079&sprefix=willsenton+r8+kt88%2Caps%2C644&sr=8-3

**Q: 11.81"d x 19.69"w x 20.08"h  i question these dimensions can someone measure the depth of this unit?  i doubt it is 20 inches tall and 19 inches deep.**
A: 8 and 1/2 inches tall , and 14 and 1/2 inches deep

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth Every Penny
*by C***0 on March 6, 2020*

So let me start out by saying that this purchase was years in the making. I had seen several tube amplifiers that could use both EL34 and KT88 tubes and one in particular that also had triode and ultralinear operating modes. My end goal was to replace several tube amplifiers including my ancient yet beloved Dynaco Stereo 70 (ST70). It should be noted that several years ago I purchased a Yaqin MC-100 amplifier but my ST70 was simply better sounding so I sold it and started my search anew. For better or worse, I'm not a wealthy audiophile but I am a very good technician so I've been able to buy most of my audio equipment broken for pennies on the dollar and then over months or years, repair it as I acquire parts. This time however, I wanted something new so this was like buying a new major appliance since it cost the same as my washer and dryer. That notwithstanding, let me tell you about this amp. When the Willsenton R8 (R8) arrived, I was pleasantly surprised to find it was triple boxed. Given the weight of this amp is over 70 pounds it needed to be well protected for shipping and it's clear from the weight this is not cheap amp. My ST70 is light as a feather in comparison. One thing I found interesting is that it shipped with the tubes already installed but there was sufficient styrofoam and tape to keep the tubes in place. Nothing was broken and my poor body survived lifting it onto the audio stand (I still got it!). On the features front, the amp comes with a high quality machined aluminum remote. The remote has no power button but does have an oddly large mute button (huh?). The amplifier itself does not have a VU meter but features a large easy to use bias meter. Keeping with the quality theme, the power and volume buttons are machined aluminum with LED illumination (red for power and green for volume) as are the selector and TR/UL buttons. A tube cage is included and the vacuum tubes are Willsenton branded so clearly a lot of care was taken to continue the quality theme. Even without having heard a single note from this amplifier, I knew I had a beautiful piece of audio jewelry for my listening room. My first impression of the amplifier was positive when I turned it on and heard nothing after hearing the startup relay click on. No hiss, no hum, just silence. The amplifier defaults to triode mode when powered on and my first listen was Introit from Faure Requiem (Naxos). Playing through my Infinity Primus 363 towers, the opening pipe organ chord filled the room with power and authority rivaling some of the best tube amps I've heard and certainly better than any I've owned. About three weeks in, I had used the amplifier enough for the tubes to settle in and now there is a greater smoothness to the sound (it was never harsh) and I can easily hear a stark contrast between triode and ultralinear modes. It should be noted that I had a Yaqin MC-100 amp and the difference in the modes was barely audible. In comparison to my ST70, the R8 is a very different sound which is to be expected since they use both different types and brands of tubes and the ST70 uses tube rectification while the R8's rectifier is solid state. I cannot say that one is better than the other as I enjoy them equally. In conclusion, I must say that the Willsenton R8 is a fine amplifier. While it is by no means inexpensive, it is certainly a value leader as it is less than half the price of competitive "brand name" equipment while yielding uncompromising build and sound quality. While sound quality can certainly be improved (or diminished) by changing vacuum tubes, the buyer of the R8 can rest assured that the branded tubes that come with the unit are by no means a cheap add-on. I'm pleased to say that the engineering and care that went into the build and parts selection of this amplifier are worthy of the best brand names. Thanks for reading!

### ⭐⭐⭐⭐⭐ Punches way above its weight for the money
*by C***R on March 20, 2026*

Warning: Long Review Unboxed it yesterday. On delivery, it’s very well packed; box inside a box and foam all around. This is a heavy amp, easily 70 lbs, and that’s a testament to its 3 transformers- they’re potted and probably make up 3/4 of the weight. This is important because the quality of an amp’s sound has a lot to do with the quality of the output transformer. In this case, heavier is better. This amp is replacing a solid state NuForce STA 200, no slouch, and very well reviewed here (and everywhere). After reading many reviews of the R8, I decided to change the tubes right away. The “ Wilsenton” tubes are ok, but this amp really lends itself to tube rolling, so I purchased 4 Gold Lion KT88’s, 2 Tung Sol 6NS7’s (replaces the two on the ends of the amp; the one in the center doesn’t impact sound quality) and two New Old Stock (NOS) Sylvania 6SL’7’s. Granted, this is an investment, but the KT88’s will last 3000 hrs or so. Set up is pretty straight forward: input terminals for CD, Aux, and Pre-In, and 4 and 8 ohm 5-way speaker terminals. Everything’s rock solid- quarter inch steel plate, well-machined knobs, really quality throughout. On off on the left, and on the right, volume control, which glows red while the amp is soft-starting- this is a good feature. In 30 seconds it goes green and the amp is ready. There is also a selector for triode mode and ultra linear mode. Triode mode is less power, but better detail. Ultra linear gives you weight and bass. The KT88’s are serious tubes-you can certainly use the amp, once the light goes green, but it takes those tubes about an hour to come into their own. And furthermore, probably another 24 to 50 hours to really burn in. Initial impressions about 7 hours in: there’s definite weight and slam in UL mode. As things warm up, the soundstage is getting more and more 3D, and on some tracks, the speakers disappear altogether, and it feels like you’re just a few feet from a live stage. This will only get better as everything burns in. Bass sounds tight and solid—no bloom typical of some lesser quality amps. Highs are rolled off a bit but crystal clear. The midrange, that part of the sound spectrum we think of when we talk about that “tube sound” is really good this early on in its burn in. Try Nils Lofgren’s “Keith Don’t Go”, or Dire Strait’s “Private Investigations”— pretty amazing stuff. One thing to consider: this amp will very clearly reflect the quality of the material it’s playing. I have Tidal and Qobuz streaming, and the quality from track to track is obvious with this amp. I can heartily recommend this amp for its solid construction and its ability to draw you into the music. Consider upgrading the tubes, as they make this amp really shine. Associated equipment: Bluesound Node with LHY power supply, Jolida DSD tube DAC and assorted upgraded cables.

### ⭐⭐⭐⭐⭐ Fantastic value for your money
*by S***O on July 5, 2021*

I have the pleasure of owning the R8 for about a month now. So, consider this an initial review Order/delivery process: I ordered it directly from Amazon as the Chinese supplier was out of stock on their website. The R8 showed up within 10 days from ordering it. I was quoted a 4-6 week window - so it got here a lot quicker. The item showed up in a secure double carton that withstood a minor puncture while shipping. Very well packed and secure. Great when you are buying a $$$$ item and want peace of mind. Unboxing/install: Very easy to do as the tubes come pre-installed. It is very heavy though - bend with knees when lifting. I checked the bias after connecting l it to my speakers - it was set up just right. Bias testing is very easy - there is need look for an auto-biasing amplifier instead. Sound Quality: It sounded great out of the box with the stock Willsenton branded tubes. While these tubes are not as nice sounding as vintage NOS tubes, they are good enough to enjoy music. It didn’t sound very tubey though - not a bad thing. It is sort of like solid state with the KT88s. Basically, it sounds fabulous. I substituted the stock tubes with Sylvania 6SL7s and 6SN7 NOS tubes and the sound quality blossomed - more bass, more clarity, basically more everything. There is also a noticeable difference between the ultra linear and triode mode - I like that this amp gives you a choice. (E.g. The Primaluna base models doesn’t provide this feature - you need to buy a $4k Evo 300 for this feature). Build quality: It feels very well built with heavy duty construction. The switches are all metal and the connections look expensive. Speaker pairing: The ~45 watt per channel output means that it easily drove my 104dB sensitive Klipsch La Scalas with very little power. I would recommend a 90dB+ sensitivity speakers if you have a large room and like loud volumes. Also it doesn’t support less than 4 ohms speakers. There is no subwoofer output of that matters to you - again the base Primalunas amp don’t have it either. Expandability: There are a lot of possibilities for tube rolling on the pre-amp, driver and output side. Only caution is that it isn’t wired for KT120s or KT150s. It tops out at 6550s/KT88s. That is more than enough for me. Remote: It comes with a metal bodied remote which feels nice to hold but is a real pain to insert or change batteries. Also the volume control feature is poorly executed on the remote - the jumps in volume are too big for each button press. I don’t use the remote as a result. Bad design. Overall: I love it. It has great build quality, expandability, power output, decent sound of the box at an affordable price. I was evaluating the R8 against the PrimaLuna Evo 100 and the Decware SE341.5. These were in the $1-2.5k bracket. I picked the R8 for its value. I had auditioned the Primaluna - it sounded decent but is not better sounding than the R8. I would rate the R8 as a better sounding amplifier. I haven’t heard the Decware amps (they have a great reputation) but as they had a real long waiting period and as I needed an amp now my decision was made. I will update this review later when I have more experience with it.

## Frequently Bought Together

- Willsenton R8 KT88/EL34 x4 Tube Amplifier Integrated AMP Power Amplifier Headphone Replaceable Basic Meter (Silver)
- Micca 14 Gauge Pure Copper Speaker Wire, 12 Feet (4 Meters 13.1ft Actual), 2 Pack Pair, Gold Plated Banana Plugs Connectors, Soldered Construction, Slim Design, 245 Strands, For Stereo or Home Theater

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-17*