---
product_id: 553646208
title: "TUBE-03 Mini HiFi Audio Preamplifier 6K4 Vacuum Tube Amplifier Buffer Treble Bass Adjustment RCA Preamp Black EU Plug"
brand: "ouna"
price: "€ 89.20"
currency: EUR
in_stock: true
reviews_count: 1
url: https://www.desertcart.gr/products/553646208-tube-03-mini-hifi-audio-preamplifier-6k4-vacuum-tube-amplifier
store_origin: GR
region: Greece
---

# Replaceable 6K4 vacuum tube for warm timbre 100dB SNR for crystal-clear sound ±6dB treble & ±10dB bass adjustment TUBE-03 Mini HiFi Audio Preamplifier 6K4 Vacuum Tube Amplifier Buffer Treble Bass Adjustment RCA Preamp Black EU Plug

**Brand:** ouna
**Price:** € 89.20
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your sound game with vintage warmth and modern precision!

## Quick Answers

- **What is this?** TUBE-03 Mini HiFi Audio Preamplifier 6K4 Vacuum Tube Amplifier Buffer Treble Bass Adjustment RCA Preamp Black EU Plug by ouna
- **How much does it cost?** € 89.20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/553646208-tube-03-mini-hifi-audio-preamplifier-6k4-vacuum-tube-amplifier)

## Best For

- ouna enthusiasts

## Why This Product

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

## Key Features

- • **Tailor Your Tone:** Fine-tune your audio with precise treble and bass controls for a personalized listening vibe.
- • **Compact Powerhouse:** Sleek aluminum alloy design with gold-plated RCA connectors fits seamlessly into any setup.
- • **Audiophile-Grade Clarity:** Experience pristine sound with a 100dB signal-to-noise ratio that elevates every note.
- • **Interference-Free Listening:** Separated audio and power circuits minimize noise, ensuring pure, uninterrupted playback.
- • **Vintage Warmth Meets Modern Tech:** Replaceable 6K4 vacuum tubes deliver that coveted soft, sweet, and warm sound signature.

## Overview

The OUNA TUBE-03 Mini HiFi Audio Preamplifier combines classic 6K4 vacuum tube technology with modern engineering, offering adjustable treble and bass controls, a high 100dB signal-to-noise ratio, and separated audio/power circuits to minimize interference. Its compact aluminum alloy body with gold-plated RCA connectors ensures durability and premium performance, making it compatible with most active speakers and power amplifiers.

## Description

Full description not available

## Features

- * With wide applied range and practicability, it can fit the majority of active speakers and power amplifiers in the market.
- * The replaceable 6K4 vacuum tubes design can optimize the circuit.
- * The audio part and the power part are completely separated, which minimizes the interference to the sound.
- * The timbre is soft and beautiful, sweet and warm and with powerful bass, penetrating treble.
- * With treble and bass adjustment, single power supply, it's small and portable, brings you much fun and conveniece.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item weight | 318 Grams |
| Body material | Aluminum |
| Included components | Bass Drum, User Manual |
| Manufacturer | OUNA |
| Item Weight | 318 g |
| Product Dimensions | 22 x 21 x 7 cm; 318 g |
| Manufacturer reference | MA5638 |
| Color Name | Black |
| Connector Type | RCA |
| Material Type | Aluminum Alloy |
| Size | EU Plug |

## Product Details

- **Colour:** Black
- **Brand:** OUNA
- **Material:** Aluminum Alloy
- **Model name:** TUBE-03
- **Item dimensions L x W x H:** 22 x 21 x 7 centimeters

## Images

![TUBE-03 Mini HiFi Audio Preamplifier 6K4 Vacuum Tube Amplifier Buffer Treble Bass Adjustment RCA Preamp Black EU Plug - Image 1](https://m.media-amazon.com/images/I/51TC9OwPiWL.jpg)

## Customer Reviews

### ⭐ Disappointed sound quality
*by S***H on 28 August 2025*

Not as expected, disappointed

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**Shop now:** [https://www.desertcart.gr/products/553646208-tube-03-mini-hifi-audio-preamplifier-6k4-vacuum-tube-amplifier](https://www.desertcart.gr/products/553646208-tube-03-mini-hifi-audio-preamplifier-6k4-vacuum-tube-amplifier)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-01-31*