---
product_id: 128497528
title: "Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4"
brand: "soumatrix"
price: "€ 33.55"
currency: EUR
in_stock: false
reviews_count: 1
url: https://www.desertcart.fi/products/128497528-soumatrix-ghk1-ampera-astra09-mokka-front-and-rear-door-drop
store_origin: FI
region: Finland
---

# Direct-fit, no amp needed Coaxial tweeter + woofer 100W power output Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4

**Brand:** soumatrix
**Price:** € 33.55
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Elevate your drive with sound that commands attention.

## Quick Answers

- **What is this?** Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4 by soumatrix
- **How much does it cost?** € 33.55 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/128497528-soumatrix-ghk1-ampera-astra09-mokka-front-and-rear-door-drop)

## Best For

- soumatrix enthusiasts

## Why This Product

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

## Key Features

- • **Cinematic Soundstage:** Coaxial design creates an immersive sweet spot for all passengers—concert vibes on the go.
- • **Pure Audio Precision:** Calibrated for OE radios to deliver distortion-free, crystal-clear music every time.
- • **Road-Ready Durability:** Built tough with premium materials to keep your soundtrack flawless through every commute and road trip.
- • **Plug & Play Brilliance:** Effortless DIY installation with zero fuss—upgrade your ride’s sound in minutes.
- • **Audiophile Craftsmanship:** Dual-layer honeycomb glass fiber woofers and aluminum-magnesium tweeters for rich, transparent sound.

## Overview

The Soumatrix GHK1 Ampera Astra09+ Mokka Speaker Set is a premium 4-piece upgrade designed for front and rear doors, delivering 100 watts of power through a coaxial tweeter and woofer combo. Engineered for direct-fit installation with OE radios, it offers audiophile-grade sound clarity and durability, making it the ultimate upgrade for millennial professionals seeking a flawless in-car audio experience.

## Description

Soumatrix speakers are deliberate sound makers tasked with the reproduction of the most sophisticated human voice and the liveliest instrumental music at breathtaking precision. The practical concept taking a passenger compartment arrange into consideration and the audiophile craftsmanship aiming for nothing, but perfection make Soumatrix your best pick for that next-level listening experience in your ride.

## Features

- Plug and Play: This is a rigid choice for a significant boost on your in-car entertainmen. Incorporating a lightweight design, Inspirit brings out the complete value of her elements.
- A Direct Fit: Calibrated for the OE radio, these speakers require no amplifier unit, provide a smooth DIY-friendly installation experience, and minimize distortion by using only direct signals to chant the purest form of your music.
- A Full Ascendance: Hand-toned with our EISA-award-winning expert to extract each musical work's lively essence. No matter if it is road trip season or another daily commute, Soumatrix gets it all.
- Coaxial Wonder: Each unit builds one tweeter and one woofer on one single axis. This unique design creates a greater cinematic sweet spot that you may enjoy in any of the seats.
- Built to Impress: Dual-layered, honeycombed glass fiber combining with natural cellulose woofers presents a smooth transparent sound. Tainted and damped aluminum-magnesium alloy tweeters secure maximum stiffness, high damping, and fast propagation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of items | 4 |
| Control method | Voice |
| Speaker size | 6 Inches |
| Power source | Corded Electric |
| Manufacturer | Sound Matrix Corp. |
| Product Dimensions | 41.91 x 27.94 x 11.43 cm; 5.27 kg |
| Item model number | GHK1 |
| Manufacturer part number | GHK1 |
| Safety rating | FCC, E-mark |
| Wattage | 100 watts |
| Item Weight | 5.27 kg |

## Product Details

- **Brand:** Soumatrix
- **Speaker maximum output power:** 120 Watts
- **Mounting type:** Door Mount
- **Material:** Aluminum
- **Model name:** astra09+
- **Speaker type:** Dual Speaker
- **Recommended uses for product:** Music,Musical,Door
- **Item weight:** 11.62 Pounds
- **Impedance:** 4 Ohm
- **Is waterproof:** True

## Images

![Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4 - Image 1](https://m.media-amazon.com/images/I/61YhuQRadzL.jpg)
![Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4 - Image 2](https://m.media-amazon.com/images/I/61gQU4jIEiL.jpg)
![Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4 - Image 3](https://m.media-amazon.com/images/I/61kbWT1n6iL.jpg)
![Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4 - Image 4](https://m.media-amazon.com/images/I/610Rwzx3oyL.jpg)
![Soumatrix GHK1 Ampera Astra09+ Mokka Front and Rear Door Drop-in Upgrade Speaker Upgrade Set of 4 - Image 5](https://m.media-amazon.com/images/I/61EQ-w1G3bL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐ Yes it DOES improve the sound, but ...
*by J***E on 11 June 2019*

I purchased this product to replace the loudspeakers on a 2016 Vauxall (or Opel if you're on the continent) Astra.First of all, let me say that the initial sound quality is an improvement over the speakers supplied with the car (Soumatrix recommend a 30 hour ‘burn in’ before playing loud tracks). Music is much more clearly defined (only tested mp3 files so far) especially in the treble and midrange, so for example cymbals and snare drums can be heard distinctly. The actual loudspeakers themselves do look better quality than the originals, with a large rear magnet housing which gives the impression that something serious is going on!The not so good news is that while the Soumatrix website provides installation guides online for Volkswagen and Skoda, there aren’t any for Vauxhall/Opel. The more curious amongst you might wonder as to why this should be. Well, I’m not much of a manual expert but I would suggest that having installation instructions that attempt to cover Buick Lacrosse, Buick Regal, Buick Verano, Buick Encore, Chevrolet Malibu, Chevrolet Cruze, Vauxhall Insignia & Vauxhall Astra all on two sub-A5 pages (although yes there is model overlap), doesn’t give the potential purchaser much confidence. There are small diagrams showing which tools should be applied where. The manual says the following tools are required: Removal Wedge, Torx Screwdriver, Slot Screwdriver & Clip removal pliers. It also says “please ensure that you follow the mounting instructions correctly to protect your door trims and use the provided “DIY tool kit”” Call me a fussbudget, but the last bit about the provided DIY tool kit, would suggest to me that purpose built kit is provided, however there was no such inclusion in the box I received. The other point worth noting is that the front tweeters in the car should be disconnected. There’s also a massive disclaimer about Soumatrix not being responsible for damage caused improper installation etc., fair enough.In the event I took the speakers and the instructions to a car audio specialist and had the speakers installed professionally (although he didn’t disconnect the tweeters).

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-16*