Stinger SI421.5 .45m 4000 Series 2 Channel RCA Interconnects
Stinger SI421.5 .45m 4000 Series 2 Channel RCA Interconnects
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Stinger SI421.5 .45m 4000 Series 2 Channel RCA Interconnects

SKU: SI4215
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$13.46
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$14.95
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We offer fast and reliable shipping options to ensure that your order arrives in a timely manner. Our dedicated team works diligently to process and ship your items as quickly as possible.

Here are some key points to note about our shipping policy:

Standard Shipping

  • Frankies offers a $15.95 flat rate for Australia-wide shipping, no matter how many items you order. Some larger or heavier items may incur an additional fee, which will be communicated to you when your order is processed.
  • While we endeavour to dispatch all orders promptly, please be advised that due to the current national fuel shortages in Australia and the resulting pressure on logistics networks, order processing and dispatch may take up to 7 business days. We are not liable for delays caused by third-party freight carriers or fuel-related logistical disruptions. By placing an order, you acknowledge that delivery timeframes may be extended beyond our standard estimates during this period.

Estimated delivery times:

  • WA, NT, and TAS: currently experiencing longer shipping times
  • Holiday periods (e.g. Christmas): deliveries may be delayed due to increased freight volumes

Express Shipping

  • Express shipping is available and calculated based on your delivery location, as well as the size and weight of your order. To receive an accurate quote, please contact our Albion Park Rail store and request an "express shipping quote." Our team will promptly assist with pricing and availability. Payment for express shipping can be securely arranged over the phone.

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Product features

Stinger SI421.5 4000 Series 2-Channel RCA Interconnect, 0.45m

Audiophile-grade 2-channel OFC RCA patch cable from the Stinger 4000 Series C3 Tech, Shoc-Krome split-tip connectors, directional twisted-pair construction. 0.45 metres (1.5ft) the shortest in the 4000 Series range.

Product Overview

The Stinger SI421.5 is the 0.45-metre (1.5ft) 2-channel version of the 4000 Series RCA interconnect range the absolute shortest available. At less than half a metre, it functions as a premium patch cable for connecting adjacent rack-mounted components, signal processors directly coupled to amplifiers, or any application where two RCA-connected components sit side by side.

It shares the same premium construction as all 4000 Series cables oversized OFC conductors, C3 Tech, Shoc-Krome plated split-tip connectors, directional twisted-pair shielding, and moulded strain reliefs.

Features & Benefits

  • 2-channel oversized OFC RCA patch cable
  • C3 Tech (Continuous Connection Construction) for unmatched signal transfer
  • Shoc-Krome plated split-tip connectors for superior contact and signal transfer
  • Directional twisted-pair construction — interference rejection
  • Compact connector design and clear flexible jacket
  • Colour-coded channel identification
  • Moulded strain reliefs for connector durability
  • 0.45-metre (1.5ft) length — shortest in the 4000 Series range

Technical Specs

Specification Detail
SKU / Part Number SI421.5
Brand Stinger
Series 4000 Series
Channels 2-channel
Length 0.45m (1.5ft)
Conductor Type Oversized OFC (Oxygen-Free Copper)
Connector Plating Shoc-Krome (split-tip)
Construction Directional twisted-pair
Signal Technology C3 Tech (Continuous Connection Construction)
Jacket Clear flexible PVC, colour-coded
Strain Relief Moulded

Compatible With / Goes Well With

Direct Vehicle Fit:

  • Universal — compatible with any car audio component with standard RCA inputs/outputs

Goes Well With:

  • Signal processors, equalisers, active crossovers, and DSPs mounted directly adjacent to amplifiers
  • Rack-mounted or stacked car audio equipment requiring ultra-short interconnection
  • Stinger SI423 (0.9m — next length up for slightly longer short runs)
  • Stinger 4000 Series amplifier wiring kits

Frequently Asked Questions

When would I use a 0.45m RCA cable?

The SI421.5 is a patch cable for adjacent component connections — where two RCA-connected units sit side by side in a boot rack, equipment bay, or under-dash installation. At 0.45m it is not suitable for standard head unit-to-amplifier runs.

Is this the shortest cable in the 4000 Series range?

Yes. The SI421.5 at 0.45m (1.5ft) is the shortest in the 4000 Series 2-channel RCA range. The full length progression is: SI421.5 (0.45m) → SI423 (0.9m) → SI426 (1.8m) → SI4212 (3.6m) → SI429/SI4217 (5m) → SI4220 (6m).

Is the SI421.5 directional?

Yes. The SI421.5 uses directional twisted-pair construction and should be installed with signal flowing from the source to the receiving component.

Can I use the SI421.5 for a subwoofer (mono) connection?

Yes. One channel of the 2-channel cable can be used for a mono subwoofer connection where the amplifier supports a dedicated mono input.

Does such a short cable still provide meaningful noise rejection?

Yes. The directional twisted-pair construction and Shoc-Krome connectors still provide effective noise rejection even at 0.45m — particularly important in boot installations where multiple power cables, amplifiers, and batteries are in close proximity.