---
product_id: 50235096
title: "Roth Audio OLI KH30 8 inch Active Sub Woofer with Rear Controls and Ports - Black"
brand: "roth audio"
price: "¥19819"
currency: JPY
in_stock: false
reviews_count: 8
url: https://www.desertcart.jp/products/50235096-roth-audio-oli-kh30-8-inch-active-sub-woofer-rear
store_origin: JP
region: Japan
---

# 8-inch woven fibre driver Banana plug speaker terminals Rear volume & crossover controls Roth Audio OLI KH30 8 inch Active Sub Woofer with Rear Controls and Ports - Black

**Brand:** roth audio
**Price:** ¥19819
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Feel the bass, own the room.

## Quick Answers

- **What is this?** Roth Audio OLI KH30 8 inch Active Sub Woofer with Rear Controls and Ports - Black by roth audio
- **How much does it cost?** ¥19819 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/50235096-roth-audio-oli-kh30-8-inch-active-sub-woofer-rear)

## Best For

- roth audio enthusiasts

## Why This Product

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

## Key Features

- • **Secure Connectivity:** Banana plug speaker terminals provide reliable, easy-to-install connections for hassle-free setup.
- • **Deep, Controlled Bass:** 8-inch forward-firing woven fibre driver delivers powerful, precise low frequencies that fill your space with immersive sound.
- • **Phase Control Precision:** Phase adjustment ensures seamless integration with your existing speakers for crystal-clear, distortion-free sound.
- • **Sleek, Professional Design:** Matte black finish with rear controls keeps your setup clean and stylish, perfect for modern workspaces or home studios.
- • **Customizable Audio Experience:** Rear panel volume and crossover controls let you tailor bass output perfectly to your room and setup.

## Overview

The OLI KH30 is an 8-inch active subwoofer featuring a woven fibre driver for powerful, controlled bass. It offers rear panel volume, crossover, and phase controls for precise sound customization, plus banana plug terminals for secure connections—all housed in a sleek black design ideal for professional and home audio setups.

## Description

The OLi Series subwoofer will amaze with its thunderous performance, stunning cosmetics, and remarkable ease of use. The OLi Subwoofer features an 8" forward firing active woven fibre driver resulting in unbelievably powerful yet controlled bass output. Volume and Crossover controls are located on the rear panel, along with Phase settings, (0 - 180), RCA jack audio inputs and banana plug speaker terminals. The large heat sink ensures reliable operation.

## Features

- The OLi Subwoofer features an 8" forward firing active woven fibre driver resulting in unbelievably powerful yet controlled bass output.
- Volume and Crossover controls are located on the rear panel
- Phase Control
- banana plug speaker terminals

## Product Details

- **Brand:** Roth Audio
- **Speaker maximum output power:** 200 Watts
- **Connectivity technology:** RCA
- **Mounting type:** Tabletop
- **Model name:** kh30
- **Speaker type:** Subwoofer
- **Recommended uses for product:** For televisions, For music players, For gaming consoles
- **Compatible devices:** Personal Computer
- **Subwoofer diameter:** 8 Inches
- **Colour:** Black

## Images

![Roth Audio OLI KH30 8 inch Active Sub Woofer with Rear Controls and Ports - Black - Image 1](https://m.media-amazon.com/images/I/91B9VlkvSGL.jpg)
![Roth Audio OLI KH30 8 inch Active Sub Woofer with Rear Controls and Ports - Black - Image 2](https://m.media-amazon.com/images/I/81myxCCgN6L.jpg)
![Roth Audio OLI KH30 8 inch Active Sub Woofer with Rear Controls and Ports - Black - Image 3](https://m.media-amazon.com/images/I/71SvPkdxXtL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent value sub
*by B***A on 6 October 2020*

I wanted to upgrade my old AIWA subwoofer and have been searching for a while when I came across this one. I needed connections that would allow me to feed the speaker outputs directly into it from my vintage amplifier and then use the subs speaker outputs to connect to the speakers. None of my old amps have a dedicated subwoofer output so this was essential. Well this one has it all and allowed the connections to be made, as described.When searching, the nearest retailer price I could find was £200, Amazon was £114 including prime delivery! On arrival it was very well packaged so no damage etc. Out of the box, connected up and works great. Independent frequency crossover, phase and volume controls allow fine adjustments to get it just right and matched with my Wharfedale Diamond 9.1’s. Placement is not critical with a sub, in the same way that stereo speakers have to be. Mine is sited off to the right of my listening position and works just fine. Speaker grill is magnetically attached to the cabinet and is very easy to attach or remove, it looks good with grill on or off IMO. All controls are at the rear and one set up, can just be left alone. I leave mine switched on permanently, connected to an audio timer along with the rest of the system. Using the auto switch on function means when power is switched on,the sub springs into life without the need for any manual input, it also switches off when power is disconnected, I like that.It is supplied with very nice speaker cones for the base which just screw in and have a slight range of adjustment if your floors are uneven. It comes with a separate IEC plug lead which means you can extend the mains lead if needed or upgrade the lead to a higher quality if you want. A separate purchase required for an upgraded lead obviously. Good quality 4mm banana plug binding posts for speaker inputs/outputs which are bare wire/spade/banana plug compatible is a nice feature. Sound is great, in theory, you should not be able to hear it, seamlessly integrating into the overall sound, with the range of adjustments on the sub, this is easily achieved. Just check out the lower frequency range of your speakers, then set the crossover on the sub slightly higher than that point. The sub then takes over the bass taking it to a lower level, fine tuning from there will get it just right!Quality fit, finish and performance are excellent, a British audio company too, what’s not to like! Highly recommended especially at this lower price, providing great value for money.

### ⭐⭐⭐⭐ Perfect punch but not thunderous bass
*by F***  on 4 July 2020*

Excellent build quality from Roth. Only used the amp for a day so will take some bedding I - but generally very happy with the performance. Musically it's perfect and picks up where my KEF 2000's stop. Film wise it was excellent and very clear playing The Martian,but didn't produve room shaking sub bass by any means,more punchy. So in summary,if you're looking for sofa shaking thunderous bass for all out action movirs....I'd look elsewhere. If you're looking for sonic clarity and a perfect musical accompaniment to your system, I'd highly recommended the Roth.

### ⭐ Broken after little use
*by W***P on 17 November 2016*

Yes its well built, powerful and smart looking. But after only a week using in a proper home cinema set up (2 subs) - the cone is broken - any deep bass notes result in horrible "clacking noise". The primary Sub I have - a now 3 year old BK Gemini continues to work fine. The Roth is in for repair under guarantee. Not year if it will last as long as the BK .......and know it hasnt been hammered (levels set using Audyssey XT32)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-09*