HELIX × APEX CUSTOMS Garden Route Exclusive

Where Sound
Becomes Art.

Helix DSP Processors, Amplifiers & Speakers — Mossel Bay, Garden Route

German-engineered precision audio. Professionally tuned with measurement equipment. Garden Route's only dedicated Helix specialist.

HELIX
by Audiotec Fischer — Germany

"The difference between a system that plays music and one that moves you to tears is the DSP and the person who tunes it."

16+ EISA Awards
1990 Founded
40 Specialists
🏆 EISA Award Winner 2025–2026
V EIGHT DSP ULTIMATE — Best Product category
The Foundation

Before speakers.
Before amplifiers.
There's your DSP.

Your DSP is the brain of your sound system. It controls time alignment, crossovers, EQ, and signal routing. Every speaker fires at exactly the right time, at exactly the right frequency. Nothing guessed. Everything engineered.

Without a DSP, you're fighting physics. Sound waves from your woofer and tweeter arrive at your ears at different times — the laws of acoustics work against you. A DSP corrects this mathematically, in real-time, for your specific vehicle's interior.

Modern vehicles make this worse: factory head units process and re-process the audio signal before it even reaches your amplifier, destroying dynamic range and frequency response. Helix's ADEP.3 technology reverse-engineers and corrects this — it reconstructs the original signal before it reaches your speakers.

The difference between a R50,000 system that sounds average and one that gives you goosebumps isn't the speakers. It's the DSP and the person tuning it.

"A R30,000 speaker system without DSP tuning is like a R2 million sports car with the handbrake on." You have the hardware. But without the brain — and the calibration — you're leaving 80% of the performance on the table.
⏱️

Time Alignment

Your driver is closer to some speakers than others. DSP corrects arrival time so all drivers hit your ears simultaneously — creating a perfect, centred soundstage.

🎚️

Parametric EQ

Unlimited precision EQ bands to remove resonances, boost missing frequencies, and flatten the response curve — tuned to your specific vehicle interior.

🔀

Active Crossovers

Tell each speaker exactly what frequency range to reproduce. Tweeters handle highs. Woofers handle mids. Subs handle bass. Zero overlap. Zero distortion.

🔧

ADEP.3 — Signal Recovery

Helix's proprietary technology detects and corrects the factory head unit's audio processing. Reconstructs the original signal. Restores what the factory destroyed.

The Brain Helix

Processors

Three tiers. One goal: your sound system firing on all cylinders. Every Helix DSP delivers high-resolution audio processing with ADEP.3 signal restoration — professional studio quality in your vehicle.

Helix DSP MINI MK2 — perspective view
Helix DSP MINI MK2 — input connections
Helix DSP MINI MK2 — output connections
🏆 Car HiFi Recommendation 2021
Entry DSP

DSP MINI MK2

"The gateway to real sound."

R9,999
96 kHz / 24 Bit High-Resolution Audio processing
64 Bit DSP engine
6 outputs / 10 inputs channel configuration
SNR 107 dB signal-to-noise ratio
THD+N < 0.002% distortion
Compact form factor — fits anywhere
ADEP.3 factory signal reconstruction
Perfect for
Factory system upgrades, space-limited installs, first DSP builds
Ask About This Unit
Helix DSP.3S — perspective view
Helix DSP.3S — output connections
Helix DSP.3S — input connections
Car HiFi Recommendation 2021
Mid-Range DSP

DSP.3S

"8 channels. The sweet spot between MINI and PRO."

96 kHz / 24 Bit High-Res Audio, BurrBrown DACs
64 Bit DSP engine (295 MHz, 1.2B MAC/sec)
8 RCA outputs / 6 RCA + 6 HL + optical + coaxial inputs
SNR 107 dB analog, coaxial SPDIF up to 192kHz
ACO platform, ADEP.3, RealCenter, 10 memory slots
Ask About Pricing
Helix DSP ULTRA S — perspective view
Helix DSP ULTRA S — input connections
Helix DSP ULTRA S — output connections
🏆 Car HiFi International 2024
Competition DSP

DSP ULTRA S

"Competition-grade. No compromise."

R26,749
96 kHz / 32 Bit High-Res Audio — reference grade
TwinDSP 64 Bit dual-core engine (2.4B MAC/sec)
12 outputs, coaxial SPDIF input up to 192kHz
AKM Velvet Sound DACs — audiophile reference
SNR 111 dB signal-to-noise ratio
The platform winning EMMA SQ championships worldwide
Perfect for
Reference systems, SQ competition, no-compromise builds
Ask About This Unit
DSP + Power Helix

DSP Amplifiers

The ultimate integration: full DSP processing and multi-channel amplification in a single chassis. One cable run. One unit. Zero compromise.

Helix P SIX DSP ULTIMATE
Helix P SIX DSP ULTIMATE — EISA Award
Helix P SIX DSP ULTIMATE — input connections
Helix P SIX DSP ULTIMATE — output connections
🏆 EISA Award Winner
6-ch Amp + DSP

P SIX DSP ULTIMATE

"6-channel powerhouse with integrated DSP."

R37,499
6-channel high-power amplification
Full integrated DSP processing
96kHz Ultra HD Audio
Premium output power for demanding builds
Ask About This Unit
Helix AMPLIFY 206 DSP
Helix AMPLIFY 206 DSP — input connections
Helix AMPLIFY 206 DSP — output connections
🏆 Car HiFi Best Product 2026
6-ch Amp + DSP

AMPLIFY 206 DSP

"Amplification plus DSP in a chassis smaller than a paperback book."

R13,599
6-channel amplification + integrated 8-ch DSP
48kHz DSP processing, 64-bit resolution, ADEP.3
Ultra-compact footprint — stealth install ready
Perfect for bakkies and SUVs with limited space
The smartest starter amp + DSP combo on the market
Ask About This Unit
German Engineering

Why Helix

Schmallenberg, Germany. Second generation ownership. Four decades of obsessive engineering. More EISA awards than any other car audio brand in history.

16+
EISA Awards
More than any car audio brand
1990
Founded
Schmallenberg, Germany
40
Specialists
Not 40,000. Precision matters.
#1
SQ Competition
EMMA & IASCA world stage
The Story

Helix was founded in 1990 by Heinz and Gudrun Fischer in Schmallenberg, Germany — a small town that would become the birthplace of some of the world's finest car audio equipment. Today, their son Julian Fischer leads the company, carrying the same obsession with acoustic precision into a second generation.

In a world where car audio brands outsource manufacturing to the lowest bidder, Audiotec Fischer does the opposite. 40 specialists. Every unit engineered and quality-controlled by the same small team. The kind of product accountability that's impossible at scale.

Their DSP PC-Tool software — used to program every Helix processor — has won the EISA Software Award consecutively. It has no serious competition. When judges run out of other contenders to award, that's not a coincidence. That's dominance.

On the competition stage, Helix processors win EMMA (European Mobile Media Association) and IASCA Sound Quality championships around the world. Not occasionally. Regularly. Systematically. The judges hear it. The data confirms it. The championships validate it.

ADEP.3 Technology: Helix's proprietary Analog Digital Extension Processor reverse-engineers the processing applied by factory head units — reconstructing the original audio signal before it reaches your amplifier. No other brand does this as effectively.
🏆

16+ EISA Awards

More than any other car audio manufacturer. The V EIGHT DSP ULTIMATE won in 2025–2026 — the latest in an unbroken streak.

🥇

EMMA & IASCA SQ Champion Platform

The DSP Ultra S and DSP Pro MK3 are the processors of choice for world-level SQ competitors. Championships don't lie.

💻

DSP PC-Tool — Consecutive Award Winner

The most powerful DSP tuning software in the industry. Measurement integration, RTA, impulse response analysis — the full picture.

🇩🇪

German Engineering Since 1990

Second-generation family ownership. 40 specialists in Schmallenberg. The antithesis of mass production.

🎯

High-Resolution Audio Processing

Helix standalone DSP processors run at up to 96kHz/32-bit — double the 48kHz standard. DSP amplifiers feature 48kHz processing optimised for amplification. USB PerfectStream accepts up to 192kHz/32-bit bit-perfect audio.

The Voice Helix

Compose Speakers

The Helix Compose Series doesn't just play music. It recreates the studio. Four tiers — from exceptional entry-level to reference-grade components used in championship-winning systems.

Helix Compose Basic CB C165 Coaxial Speaker
🏆 EISA Award · Car HiFi Best Product 2024
Entry Tier — Coaxials

CB Coaxials

"Drop-in upgrade. Immediate improvement."

R2,499
CB C165.2-S3 — 6.5" coaxial — R2,499
CB C130.2-S3 — 5.25" coaxial — R2,499
CB C100.2-S3 — 4" coaxial — R2,499
Silk dome tweeters, 3 Ohm impedance
Direct factory speaker replacement — no modification needed
Ask About This Speaker
Helix Compose Basic CB K165 Component Kit
Helix Compose Basic CB K165 — EISA Award
🏆 EISA Award · Car HiFi Best Product 2024
Entry Tier — Component Kits

CB Component Kits

"Separate woofer + tweeter + crossover. The real upgrade."

R4,199
CB K165.2-S3 — 6.5" component kit — R4,199
CB K130.2-S3 — 5.25" component kit — R4,199
CB K100.2-S3 — 4" component kit — R4,199
Silk dome tweeters, 3 Ohm, dedicated crossover
Perfect partner for DSP MINI MK2 builds
Ask About This Speaker
Helix Compose i3 Ci3 C165 Coaxial Speaker
🏆 EISA Award · Car HiFi Product of the Year 2024
Mid Tier — Coaxial

Ci3 Coaxial

"Titanium tweeter coaxial. Drop-in excellence."

R3,599
Ci3 C165.2FM-S3 — 6.5" coaxial
Titanium dome tweeter for extended high-frequency detail
3 Ohm impedance, cenosphere-coated paper cone
Direct factory replacement — immediate sound upgrade
Ask About This Speaker
Helix Compose i3 Ci3 K165 Component Kit
Helix Compose i3 Ci3 K165 — EISA Award
🏆 EISA Award · Car HiFi Product of the Year 2024
Mid Tier — Component Kits

Ci3 Component Kits

"Where most competitors peak, Helix is just getting started."

FromR6,799
Ci3 K165.2FM-S3 — 6.5" component kit — R6,799
Ci3 K200.2FM-S3 — 8" component kit — R8,399
Titanium dome tweeters, dedicated crossovers
Precise imaging — vocals lock in place
Ideal for DSP-tuned front stage builds
Ask About This Speaker
Helix Compose i5 Woofer
Helix Compose i5 W165 — front view
Helix Compose i5 W165 — magnet detail
🏆 EISA Award Winner
Audiophile Tier

Compose i5 (Ci5)

"Audiophile-grade. For systems that demand perfection."

FromR3,399
25mm tweeter — R3,399
50mm midrange — R3,899
6.5" woofer — R5,399
8" shallow woofer (DVC/SVC) — R7,149
Competition-proven drivers used in award-winning builds
Ask About Pricing
Helix Compose i7 Tweeter
Helix Compose i7 W165 — EISA Award
Helix Compose i7 T20FM SC tweeter
🏆 EISA Award · Car HiFi Best Product 2023
Flagship

Compose i7 (Ci7)

"The flagship. For those who accept nothing less."

FromR3,899
Passive crossover — R3,899
6.5" woofer — R8,499
Tweeter — R8,899
6.5" component kit — R17,499
Reference-grade — championship-winning systems worldwide
Ask About Pricing
The Foundation Helix

Subwoofers

Feel every note. Helix subwoofers are tuned for musical accuracy, not just maximum output — but don't let that fool you. These hit with authority.

Helix Impact IK S8 Shallow Subwoofer
Helix Impact IK S8 — perspective view
Helix Impact IK S8 — with grille
Shallow Mount

Impact IK S8

"Fits where others can't. Hits where others don't."

R2,999
8" shallow mount dual voice coil
Fits under seats, in spare wheel wells
Slim profile — invisible install
Clean, controlled bass response
Ask About Pricing
Helix Impact IK S10
Helix Impact IK S10 — perspective view
Helix Impact IK S10 — cone detail
Helix Impact IK S10 — with grille
Shallow Mount

Impact IK S10

"More cone area. More authority."

R3,899
10" shallow mount dual voice coil
Shallow mount design — no enclosure compromise
Behind panels, spare wheel wells, under rear seats
Don't let the slim profile fool you — these hit with authority
Ask About Pricing
Helix IQ-W10 Reference Subwoofer
Helix IQ-W10 — perspective view
Helix IQ-W10 — TMS detail
Helix IQ-W10 — with grille
🏆 Car HiFi International Sound Award 2025
Reference Grade

IQ-W10

"Reference-grade bass. Feel every note, not just the boom."

R9,999
10" reference subwoofer
Audiophile-grade bass reproduction
Designed to partner with Helix DSP for perfect crossover integration
Used in SQ competition builds worldwide
Ask About Pricing
Helix IQ-W12 DVC2 12-inch Reference Subwoofer
Helix IQ-W12 — TMS detail
Helix IQ-W12 — with grille
Reference Grade

IQ-W12

"The ultimate 12-inch reference subwoofer."

R11,599
12" reference subwoofer
Maximum low-frequency authority
Designed for dedicated enclosure builds
The pinnacle of Helix bass performance
Ask About Pricing
Helix U10A Powered Underseat Subwoofer
Helix U10A — perspective view
Helix U10A — front view
Powered Underseat Sub

U10A Underseat

"Complete powered sub solution. Invisible but unmistakable."

R7,999
Complete powered solution — amp built-in
Mounts directly under your seat
No enclosure required — simplest possible install
Ideal for SUVs and bakkies with limited boot space
Ask About Pricing

Think Helix can't get loud? Think again.

These SQ components, subs and amps easily reach 130–140dB — the pain threshold. You get concert-level volume with audiophile clarity. Not one or the other. Both.

The difference: a Helix system at 130dB sounds like a concert. Most systems at 130dB sound like a blender. DSP tuning is the reason.

The Muscle Helix

Amplifiers

Clean, controlled power delivered at every frequency. Helix amplifiers are engineered to partner with Helix DSP — the synergy is by design, not coincidence.

Our Most Popular Amplifier

AMPLIFY 206 DSP

6-channel amplification and full DSP processing in a chassis smaller than a paperback book. The smartest entry into Helix audio.

R13,599

Amplifier

6 channels — 75W RMS x 4 + 150W RMS x 2 (bridged)
Class D topology — high efficiency, minimal heat
2/4 Ohm stable on all channels
Signal-to-noise ratio >100dB

DSP

48kHz / 64-bit DSP processing (8 channels)
30-band parametric EQ per channel
Time alignment, phase correction, crossovers
ADEP.3 factory signal restoration

Integration

Ultra-compact: 175 x 120 x 40mm — stealth installs
High-level inputs — connects to any factory head unit
Controlled via DSP PC-Tool or Conductor app
Perfect for bakkies and SUVs with zero spare space
Get the 206 DSP Installed
AMPLIFY Series

The Complete Range

Ultra-compact amplifiers designed for stealth installation. Every model fits where traditional amps can't.

Helix AMPLIFY 201 X-OVER
Helix AMPLIFY 201 X-OVER — alternate view
🏆 Car HiFi Upper Class 2025
AMPLIFY 201 X-OVER
Mono subwoofer amplifier with built-in active crossover. Ultra-compact chassis — fits anywhere.
1 channelClass DActive crossover1 Ohm stable
R6,249
Enquire
Helix AMPLIFY 204 X-OVER
Helix AMPLIFY 204 X-OVER — alternate view
AMPLIFY 204 X-OVER
4-channel amplifier with built-in active crossover. Powers your entire front stage from a chassis smaller than a paperback.
4 channelsClass DActive crossover
R6,249
Enquire
Helix AMPLIFY 201 DIRECT
Helix AMPLIFY 201 DIRECT — alternate view
AMPLIFY 201 DIRECT SPECIAL ORDER
Compact mono sub amp with DirectDSP input. Connects directly to a Helix DSP — no standalone controls. Not reusable in other installs without a DSP.
1 channelClass DDirectDSP only1 Ohm stableSpecial order
R5,899
Helix AMPLIFY 204 DIRECT
Helix AMPLIFY 204 DIRECT — alternate view
AMPLIFY 204 DIRECT SPECIAL ORDER
Compact 4-channel amp with DirectDSP input. Connects directly to a Helix DSP — no standalone controls. Not reusable in other installs without a DSP.
4 channelsClass DDirectDSP onlySpecial order
R5,899
M Classic Series
Helix M FOUR
Helix M FOUR — input connections
Helix M FOUR — output connections
🏆 Car HiFi Best Product 2018
M FOUR
4-channel Class AB amplifier. Clean, musical power for front-stage component speakers.
4 x 70W RMSClass ABBridgeable
R7,699
Helix M ONE
Helix M ONE — input connections
Helix M ONE — output connections
M ONE
Mono subwoofer amplifier. Dedicated low-frequency power for clean, controlled bass.
1 x 500W RMSClass DSubsonic filter
R6,799
Helix M SIX amplifier
Helix M SIX — input connections
Helix M SIX — output connections
M SIX
6-channel amplifier with active crossover. Clean power for full front and rear stage.
6 channelsClass DActive crossover
R9,999
Helix M SIX DSP
M SIX DSP DISCONTINUED
6-channel amplifier with integrated 10-ch DSP. Replaced by AMPLIFY 206 DSP.
6 channels10-ch DSPClass D
R15,999
Ultimate Series
P ONE MK2
High-power mono reference amplifier. Engineered for competition-grade subwoofer performance.
1 x 1000W RMSClass DReference grade
R24,999
M ONE X
Mono amplifier from the Ultimate series. Serious low-end authority.
1 x 750W RMSClass DUltimate series
R8,999
Why Buy Through APEX

The APEX Advantage

"A DSP is only as good as the person tuning it."
The hardware gets you in the door. The calibration separates a system that impresses from one that moves you to tears.

📏

Professional Calibration Equipment

We use AudioControl measurement equipment to tune every system. Real-time analysis. Real correction. Not ear-balling it with a free app.

🔧

25+ Years Garden Route Experience

This isn't a hobby. This is our craft. Every vehicle in the Garden Route has been through similar acoustic challenges — we know what works.

🎯

End-to-End System Engineering

We don't just install. We design your system from source to speaker. DSP selection, speaker placement, power, wiring — every decision integrated.

🚗

Your Vehicle, Your Sound

Every vehicle interior is acoustically different. Every listening preference is personal. Your DSP tune is custom-built for both. Nobody else's tune works in your car.

💬

Direct WhatsApp Access

No call centres. No ticket systems. Direct access to the person who designs and installs your system. Before, during, and after the build.

Authorised Helix Dealer

Full manufacturer backing. Genuine product. Proper warranty support. When you buy Helix through APEX, you're buying it right.

"A R27,000 DSP tuned by someone watching a YouTube tutorial vs tuned by a veteran with professional measurement equipment."
Same hardware. Completely different result. The tuning is the product. We're the product.
Complete the System Helix

Accessories

Every piece of a Helix system works together by design. These accessories complete the chain.

Helix CONDUCTOR One-Touch Remote
CONDUCTOR Control
One-touch remote for Helix ACO DSP processors. Volume, source, setup — one knob.
R2,849
Helix BT HD Streamer
BT HD Streamer
Bluetooth audio retrofit for DSPs with optical input. Hi-Res wireless streaming.
R3,399
Helix CAP 1000 Power Stabilizer
CAP 1000 Power Stabilizer
1,000,000 uF power buffer. Stabilises voltage during high-demand bass hits.
R4,999
Helix AAC.3 Active Audio Converter
AAC.3 Active Converter
Smart active high-low converter for OEM head units. Preserves the full audio signal.
R2,699
Helix AAC.3 HP Active Audio Converter
AAC.3 HP
High-power version for OEM amplified systems. Handles higher output levels.
R2,699
Helix URC.3 Universal Remote
URC.3 Remote
Universal remote — volume + source/setup switching via MiniDIN connection.
R1,099
Helix URC.1 Sub Volume Remote
URC.1 Sub Remote
Sub volume adjust remote via SCP connection. Simple bass level control.
R899
Helix CAP 33 Noise Suppressor
CAP 33 Noise Suppressor
Eliminates alternator whine and electrical interference from the audio signal.
R1,499

Want it even louder?

For the bass heads, the SPL warriors, and the window-flexers — we carry the full Rockford Fosgate range. If Helix is precision audio for the audiophile, Rockford is raw American firepower for those who want the earth to shake.

Rockford Fosgate
Rockford Fosgate
Mossel Bay, South Africa

Worth the Drive

Based in Mossel Bay, we welcome clients from across South Africa. From Cape Town to Johannesburg, car audio enthusiasts make the trip because the results speak for themselves. The Garden Route is our home — and your destination for world-class sound.

Mossel Bay
George
Knysna
Plettenberg Bay
Wilderness
Hartenbos
Oudtshoorn
Stilbaai

Nearby towns — and we regularly see clients travelling from Cape Town, Johannesburg, Port Elizabeth, and beyond.

📱
WhatsApp
📞
📍
Location
Mossel Bay, Garden Route
Western Cape, South Africa
🕐
Hours
Mon–Fri: 08:00–17:00
Sat: By appointment

GOOGLE REVIEWS

41+ five-star reviews.

★★★★★

"The installation was done to perfection. Professional service by friendly helpful personnel. Sound quality is amazing!!"

— Peet Haefele
★★★★★

"Albert is a very passionate and knowledgeable person in his art. I asked for a Sound Quality system and I got exactly that."

— cjovaras5566
★★★★★

"What an experience — best service for all car needs. As the supplier of Rockford they did an outstanding job on the sound install."

— Deane Henard Hattingh

Read all 41+ reviews on Google

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