METRA MTRIB4GRNRT-50 Nickel Ring Terminal 4 Gauge 5/16 inch 50 Pack
- Cable Terminals & C…
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Converts speaker-level signals to RCA for adding amplifiers, with 55-watt maximum input, separate channel level controls and gold-plated outputs
This Raptor converter lets you add an aftermarket amplifier to a factory radio that uses short-circuit protection on its speaker outputs. It accepts a 55-watt maximum input per channel and provides a 6:1 step-down with variable output so the amplifier receives a clean, low-level signal. Separate level controls for each channel allow precise balancing of the front or rear pair. The unit is aimed at installers and enthusiasts who want to keep the OEM head unit while upgrading power and sound quality.
A 12-volt signal-sense circuit turns the converter on automatically when the factory radio powers up, removing the need for a separate remote wire. Gold-plated RCA outputs resist corrosion and maintain low resistance over time. Molded channels on the housing grip zip ties securely, preventing the wiring loom from shifting or rattling behind the dash or in the boot. The compact chassis fits into tight cavities without requiring large mounting surfaces or brackets.
The design works specifically with OEM radios that mute or protect their outputs when they detect a short, allowing the converter to present a safe load without triggering the factory protection. Independent gain knobs let you match each channel to the amplifier’s input sensitivity, reducing hiss and preventing clipping at high volume. No additional modules, harnesses or software are required; the package contains only the converter itself for a straightforward, hardware-only installation.
Measured against everything we stock in Amp Wiring Kits & Install Parts, at today’s prices. Recalculated every night.
No published specifications for this item yet.
Yes, the 12-volt signal-sense detects the OEM radio's output and switches the converter on without a separate remote wire.
The molded channels accept standard zip ties so the unit can be strapped to a harness or chassis rail; no screws or brackets are required.
Play a 0 dB test tone, raise each channel's gain until the amplifier's clip indicator flashes, then back off slightly for clean headroom.
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