main image

Spotless HiFi 4″ Powered Subwoofer Sound Tower


MSRP: $669.00

0 Import Duty

we deliver duty paid  (DDP) to certain countries

Big Discount Available

discount price up to 60% off

In Stock

we keep the products in stock to ensure fast shipping

Worldwide Shipping

we ship to your doorstep


we blind drop ship to save your time and costs

Spotless Audio


Spotless is an authentic, simple, approachable, and unpretentious brand of traditional handicrafts.

We believe in sticking to our ideas and original designs, injecting thoughts and emotions into every detail and every product, to give it more vitality. We don’t strive for perfection; we strive to hold the nostalgic mood and to interpret the artisanal sentiment of age, to the old traditional handicraft works, which remind us how to listen to the years’ footprints.

Whether auditory, visual, or tactile, our handicrafts will quietly wait for your heart to approach them, understand them, and feel them.

spotless audio logo
Spotless Seed Story

Story of Seed

What is the most powerful thing on the planet?

Some people say elephant, some say lion,
some joke that it is King Kong.

How much power King Kong has,
of course, we do not know.

In Spotless terms, the most powerful thing in the world
is the seed of a plant.

The power revealed by a seed is infinite.

Spotless Seed4x4 stacking

powered bass tower

It is made for you who beautify the world with love. With joy, listening together!


Creative Stacking Design

2 x 4″ subwoofers floor-standing speaker designed for Seed 2.1 mini speaker


Compact Dimensions

86 * 145 * 814 mm


Small is Big

The visual and auditory disparity of sensation



Sound with soul


Birch Wood Cabinet

Following the traditional materials used for musical instruments

Seed4x4 and Seed2.1

Seeing is believing – the new generation Seed mini audio system.

All seeds of faith break out of the ground, without thinking about whether they will encounter rain or sunshine. For with resistance comes trials and growth.

After four years of journey, Spotless is launching a mini audio system with a new look.

Spotless D1 amplifier + Seed 2.1 bookshelf speaker + Seed 4×4 subwoofer tower + 211 bookshelf speaker stand

Crafted with a unique mind – A compact stacking bass compensation system

The Seed 2.1 mini speaker is excellent for vocals and violin in a small listening space. To have a full-range dominance and improve its low-frequency performance, Spotless tailor-made the subwoofer tower Seed 4×4.

Each tower is equipped with two self-developed 4″ mid-woofers. Its wood, size, and craftsmanship are well integrated with the Seed 2.1 mini speakers. Both Seed 4×4 and Seed 2.1 cleverly combined into a more comprehensive floor standing sound system.

As a result, the sounds field significantly increased. It has precise positioning, more bass textures, a solid musical flavor. The low-frequency quality, soundstage depth, midrange clarity, and image power significantly improve. Like a pair of big floor-standing speakers, it is suitable for listening in a larger space.

Seed4x4 + Seed2.1

Dual 4″ subwoofers

Powerful low frequency

Spotless has developed a new generation of 4″ woofer units with composite fiber paper cone, aerospace magnets, 180 degrees symmetrical wiring, gold-plated antioxidant terminals, and short-circuit ring design.

The cabinet comprises 15mm thick FSC certificated birch wood multi-layer boards with an extended port tube.

Thanks to the materials, design, and craftsmanship, the low-frequency texture is firm and robust, powerful dive, and has rich harmonics.

4" subwoofers x2

Original Stacking Design

The Seed 4×4 sound tower is interconnected with the Seed 2.1 mini speaker via a hand-made jumping cable, practical and easy to use.

Seed 4x4 Bass Tower

Premium Quality Solid Steel Speaker Stand

The solid steel speaker stand is tailor-made for the Seed 4×4 sound tower. It is mounted on the bottom to provide better stability and counteract vibrations.

The peg height is adjustable.

Seed4x4 Speaker Stand
Seed 4x4 Bass Tower

Stand is half-life of a bookshelf speaker.

For bookshelf speakers, audiophiles are saying that the speaker stand is the second spring for bookshelf speakers. The right match with a stand can make the speaker play well with their performance and the characters.

Spotless’s original design solid steel bookshelf speaker stands can positively reduce vibrations and improve performance.

One of the essential features is to make the middle and high frequencies vivid and dynamic, rich in details, and make low frequencies clean and more bouncy.

seed 2.1 mini audio system

Tech Specifications

Long-term Power

60 watts

Short-term Power

100 watts

Frequency Response

50 Hz~300 KHz






200*280*814 mm


36 KGS/Pair

Seed4x4 Bass Tower Dimensions

Large Bookshelf Speakers

→ Eternal 8.3
→ Eternal 12.3
→ Eternal 12.5

Spotless Audio – handmade bookshelf speakers for Audiophiles

From 2″ small bookshelf speakers to 12″ large bookshelf speakers,
we have the right size for you.

Medium Bookshelf Speakers

My cart
Your cart is empty.

Looks like you haven't made a choice yet.