---
product_id: 725273689
title: "HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair"
brand: "hivi-swans"
price: "¥94263"
currency: JPY
in_stock: true
reviews_count: 5
url: https://www.desertcart.jp/products/725273689-hivi-swans-oasis-140-passive-hifi-bookshelf-speakers-4-bass
store_origin: JP
region: Japan
---

# 20mm soft dome tweeter 4'' metal mid-bass driver 4th-order ported anti-resonance design HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair

**Brand:** hivi-swans
**Price:** ¥94263
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your soundscape with Oasis 140 — where style meets studio-grade precision.

## Quick Answers

- **What is this?** HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair by hivi-swans
- **How much does it cost?** ¥94263 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/725273689-hivi-swans-oasis-140-passive-hifi-bookshelf-speakers-4-bass)

## Best For

- hivi-swans enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** High-density rigid wood cabinet suppresses internal noise and promises years of premium audio performance.
- • **Universal Compatibility:** Gold-plated pure copper connectors guarantee lossless signal transmission with any amplifier.
- • **Audiophile-Grade Clarity:** Experience crystal-clear vocals and intricate sound details with precision-engineered drivers.
- • **Vibration-Free Deep Bass:** Advanced anti-resonance structure ensures tight, distortion-free low frequencies for immersive listening.
- • **Timeless British Minimalism:** Elegant matte and wood grain finish that elevates your workspace or living room aesthetic effortlessly.

## Overview

The HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers combine a 4-inch metal mid-bass driver and 20mm soft dome tweeter within a rigid, anti-resonance wooden cabinet. Designed for audiophiles and professionals, these 4Ω speakers deliver clear, distortion-free sound up to 50W, featuring gold-plated connectors for universal amplifier compatibility and a sleek British minimalist design that complements any modern workspace or home theater.

## Description

At HiVi-Swans, our mission is simple: bring authentic, enjoyable sound to everyday listening. Across both active and passive bookshelf speakers, we focus on acoustic-first engineering—driver matching, crossover tuning, and cabinet control—to reduce distortion and coloration for natural vocals, clear detail, and layered soundstage.
We believe great sound should not be limited to studios. It should fit your desk, living room, and daily routine.
Whether for near-field listening, movies, or music after work, HiVi-Swans provides reliable and easy-to-match speaker solutions for different setups and preferences. From material selection and craftsmanship to final quality checks, we refine every detail that affects real listening performance. To us, a speaker is more than hardware—it is a bridge between emotion and lifestyle.
Looking ahead, we will continue to innovate around accurate reproduction and long-term listening comfort, so every play sounds closer to the original recording.

## Features

- Premium Hi-Fi Studio Sound Performance: Fitted with 20mm soft dome tweeter and 4-inch metal mid-bass driver, delivers clear vocal layering and fine detail for authentic audiophile listening at your desktop or study space.
- Advanced Anti-resonance Acoustic Structure: Professional 4th-order ported design with low-noise duct and isolating foot studs reduces cabinet vibration and airflow noise, offering tight, deep bass without distortion or buzzing.
- High-density Rigid Cabinet Construction: Solid acoustic housing with premium wood grain finish suppresses internal sound interference, maintaining stable pure audio quality and long-lasting daily use for years.
- Classic Elegant British Minimalist Appearance: Sophisticated matte panel and textured veneer design match home decor, study rooms and office styles perfectly, blending high-end sound quality with timeless interior aesthetics.
- Gold-plated Pure Copper Connection Design: Lossless signal transmission with universal passive speaker compatibility, easy pairing with various amplifiers for flexible home audio upgrade and reliable long-term connection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age Range Description | Adult |
| Antenna Location | for computers/TV/Surround Sound Systems/Music Players/Front |
| Asin | B0D9GH3876 |
| Audio Driver Size | 20 Millimetres |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Best Sellers Rank | 84,515 in Computers & Accessories (See Top 100 in Computers & Accessories) 334 in Computer Speakers |
| Box Contents | A pair bookshelf speakers, Instruction Manual |
| Brand Name | HiVi-Swans |
| Colour | Gray wood grain |
| Compatible Devices | Desktop, Home Theater, Television |
| Connectivity Protocol | Wired |
| Control Method | Touch |
| Customer Package Type | carton |
| Customer Reviews | 4.5 4.5 out of 5 stars (87) 4.5 out of 5 stars |
| Enclosure Material | Wood |
| Frequency Response | 20 KHz |
| Impedance | 4 Ohms |
| Input Voltage | 120 Volts |
| Is Waterproof | False |
| Item Dimensions D X W X H | 15D x 19.8W x 23.5H centimetres |
| Item Weight | 5.7 Kilograms |
| Manufacturer | SWAN |
| Maximum Range | 10 Metres |
| Maximum Speaker Output Power In Watts | 50 Watts |
| Model Name | Oasis 140 |
| Model Number | Oasis |
| Mounting Type | Table Top, Desktop |
| Mp3 Player | No |
| Network Connectivity Technology | Wired |
| Number Of Audio Channels | 2.0 |
| Number Of Items | 2 |
| Power Source | Corded Electric |
| Product Features | amplifier required, home audio speakers, passive speakers |
| Speaker Size | 4 Inches |
| Speaker Type | woofer/tweeter |
| Specific Uses For Product | Gaming, Home Theatre, Party |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Speaker Diameter | 4 Inches |
| Tweeter Diameter | 1 Inches |
| Unit Count | 1.0 count |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | No Wireless Communication Technology |
| Woofer Driver Diameter | 4 Inches |

## Product Details

- **Audio output mode:** Stereo
- **Brand:** HiVi-Swans
- **Connectivity technology:** Wired
- **Frequency response:** 20 KHz
- **Input voltage:** 120 Volts
- **Material:** Wood
- **Model name:** Oasis 140
- **Mounting type:** Table Top, Desktop
- **Speaker maximum output power:** 50 Watts
- **Speaker type:** woofer/tweeter

## Images

![HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair - Image 1](https://m.media-amazon.com/images/I/71l5RWLpNbL.jpg)
![HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair - Image 2](https://m.media-amazon.com/images/I/71iIYDWpMmL.jpg)
![HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair - Image 3](https://m.media-amazon.com/images/I/81iwUqENzvL.jpg)
![HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair - Image 4](https://m.media-amazon.com/images/I/71J14NENrZL.jpg)
![HiVi-Swans Oasis 140 Passive HiFi Bookshelf Speakers, 4'' Bass 20mm Tweeter Hifi Speakers, 4Ω 10-50W Hifi Speakers Pair - Image 5](https://m.media-amazon.com/images/I/81Ngt7ArZHL.jpg)

## Available Options

This product comes in different **Style Name** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Get them, they're Swan. That's all you need to know.
*by  on Reviewed in the United States 4 November 2024*

These are fantastic. Just get them. That's enough review really, you'll love them for a room of 20'x20' of less. Fantastic characteristics and tone reproduction.That said, the details: The tweeter is alright, very good but doesn't come alive until you hit about 75% volume limits of the speaker, at which point they are matched to the woofer, that's my only complaint. Truly. But luckily because they are small you are probably going to listen to them between 60 and 90 percent of their limits most times so you end up right in that sweet spot. They absolutely needed a ten-to-twenty-hour break in period to unleash their full detail sound as Swan loves to use very soft drivers which aren't quite right until they break in. Once they break in, you will smile ear to ear, and they're cheap! The bass depens and gets quicker, the tweeter relaxes and pushes cleaner, then mid details start to pop out in front of the soundstage, excellent for a voice like Sara Mcglaughlin or Beth Hart, Jeff Buckley or Chis Isaak.Day one I was not sure how much I loved them: they were good but, especially when comparing A to B to the RB42 by Micca (listening on Emotiva A2 mini: Emotiva watts are twice what other manufacturers can match with the same rating). Where the Swan starts to fall apart is the exact volume where the RB42 comes alive finally. So, it turns out that below "can't talk over it" levels of volume the Swan kicks the hell out of the Micca. And I'm with Zeos, the Micca RB42 is God tier legendary, get those too ha-ha. But, no joke, if your amp doesn't push 100 watts a channel no sweat you will never hear the magic of the Miccas. With 12 watts a channel, however, the Swans are perfectly content blasting beautiful sound your way.Day 2-today: Amazed, simply amazed. These are so easily listenable it's insane, no fatigue whatsoever after hours of loud listening. Just smiles.The best part of these is that they scale like 2K dollar speakers. On the Onkyo 8220, they soar, the Emotiva, even better, the Parasound 275, just amazing quality sound on EVERY song and type of music. I have a Beomaster 5500 which was just perfect with this set as they really bring out the detail of the tweeter. That said, they still sounded fantastic with a Fosi audio 75$ amp or the Aiyima small amps as well. Even the 40$ Nobsound miniature amp (about the size of a cigarette pack or smaller) brought these to life, even if the mids were lacking warmth and tone. Are you getting the idea? ANY amp you put them on they sound fantastic, it just gets more fantastic the better the amp. The only amp I couldn't recommend is the Yamaha amps as they are already so warm that combined with these you lose too much of the detail and it's edges on muddy in the mid range.My deserted island speakers are the JBL Studio 530 and at lower volumes (0-80%) these Swans have no problem keeping up with those. In fact, they might be a bit more nuanced and richer. Their only limitation is their size. BUT they perform like a set of speakers three times the size. Swan are experts at pulling silly levels of bass out of tiny boxes and drivers, it's almost Voodoo. And yes, they are way better than the MB42x, a lot better. Sorry Micca, but it's true. The MB42X sounds like it's in pain trying to reach down to the thump and extended reverb that these Swan's effortlessly produce. Like I said, it's Voodoo.These are the new (by far) benchmark for small speakers, and they are by far the cheapest of the best (excepting the MB42x). Soundstage is huge, no harshness in high treble, beautiful chocolaty midrange, and bass that will make you wonder if you're sub is on, it's surprising right up to their limits.Zeos note (ZReviews on Youtube): They do color the sound. If you are one who wants every raunchy detail out of old or bad recordings these will disappoint you. I love the "murder tweeter" in Jamo speakers and in vintage B&O speakers like the CX50 and CX100. But who wants that other than serial killers? For regular folks the coloration they provide is SOOOOO warm and comforting to listen to. Like glass of wine by the fire on a cold night comforting. Get them, just get them. You will be so happy you did.

### ⭐⭐⭐⭐⭐ Sonido exelente.
*by  on Reviewed in Mexico 6 May 2026*

Buen producto, bonito y con gran calidad de sonido.

### ⭐⭐⭐⭐⭐ First time with passive speakers
*by  on Reviewed in Canada 10 August 2025*

This is my first experience with passive speakers and I am very happy with it. My last set of speakers were the Edifier MR4s, and I would say these 140s sound really crisp compared to it. It's more neutral sounding and has a lot more power at lower volumes. The low end definitely lacks compared to the MR4s but with a subwoofer anyways it's not a big deal. I have this paired with the Fosi V3 Amp and using the SMSL C200 as my DAC/Pre out. Maybe it's unfair to compare powered and passive speakers since there is more control or freedom with a passive setup. But I would say spending an extra $70 to $100 for an Amp is well worth it. Considering there is a lot of great budget options these days for DACs/Preamps/Amps from the Chifi market. They also often go on discounts as well and it's even greater value at that point.

## Frequently Bought Together

- HiVi-Swans Oasis 140 Passive Speakers, 2-Way HiFi Bookshelf Speakers for TV Desktop Stereo or Home Theater Surround Sound - Needs Amplifier or Receiver to Operate
- GearIT 14 AWG Speaker Cable with Banana Plugs 14Ga Banana Wire for Bi-Wire Bi-Amp HiFi Surround Sound
- AIYIMA T9 PRO 200W Bluetooth Amplifier HiFi Digital Class D Power Amp 2.0/2.1 Channel Vacuum Tube DAC Amp with VU Meter & Bass Treble Bluetooth 5.1 Coaxial Optical PC-USB inputs

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-01*