Welcome to OSCA Shop

We’re here to help you navigate car audio properly. We take pride in guiding enthusiasts of all levels, whether it’s a simple upgrade or a full system build.

Need Help? Talk to an expert

Product details

Advanced Specifications
  • Conductors: 2 × 20 AWG OCC solid rectangular
  • Shielding: 3-layer (OFC braided + OFC foil + PVC)
  • Structure: twisted
  • Connectors: 4 × silver uncoated male RCA
  • Outside diameter: 8 mm (2 conductors)
Key Features
  • Solid rectangular OCC conductors are used to keep the signal path consistent, rather than relying on fine-strand bundles that can vary with flex and termination quality.
  • The twisted structure helps reject induced noise when RCAs need to run near power wiring or vehicle looms.
  • Triple-layer shielding is specified to handle the real mix of interference in cars, giving the signal a better chance of arriving unchanged.
  • Uncoated silver RCA plugs are a defined termination choice for direct contact quality, rather than generic plated connectors.
  • The construction focus is on maintaining a quiet background so system detail retrieval isn’t masked by noise.
Best Suited For
  • DSP-to-amplifier and source-to-DSP runs in high-resolution systems
  • Vehicles with known EMI/RFI noise issues where shielding quality matters
  • Installations where the interconnect is expected to preserve low-level detail and separation
  • Systems where cable choice is part of an overall noise-control and grounding approach
Why OSCA Backs This Product

Concerto is the kind of cable you use when the system is already resolving properly and you want the interconnect to stop being part of the problem. The construction choices are the point here: solid OCC conductors, a proper triple-shield layout, and uncoated silver RCA terminations, all aimed at keeping the signal clean in a car where interference is the norm. It’s also been recognised in EMMA as “Best Performance” as stated, which lines up with how it’s built and why people choose it in serious installs.

Award-Winning Signal Purity

The highly acclaimed award-winning interconnect extracts every micro-detail from your source while maintaining the tonal richness that makes music emotionally compelling. This is the cable that earned EMMA’s "Best Performance" recognition (detail retrieval from a noiseless background).

REAL CAR AUDIO

Backed by People Who Live it

Pure Signal. Uncompromised Sound.

Harmonic Harmony cables are the result of an unwavering commitment to detail, craftsmanship, and pure musical expression. Engineered for audio systems where every nuance matters, the range is built upon a foundation of ultra-pure OCC copper, multi-layered shielding, and precisely engineered geometries that preserve the full integrity of the source signal, without coloration or compromise.

With performance proven in international sound quality competitions, Harmonic Harmony products are favoured by system designers and competitors who demand transparency, tonal richness, and imaging accuracy. Every cable is meticulously hand-assembled, tested, and tuned to elevate the emotional connection between you and your music.

Learn more about our brands

Fast Dispatch

Orders processed within 24 hours

Authorised Australian Seller

Genuine products from verified suppliers

Standard 12-Month Warranty

Manufacturer warranty on all products

Expert Support Available

Technical assistance from audio specialists