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Compact black isolator with 3.5mm female jack and dual RCA male plugs

PYLE AUDIO

PYLE AUDIO PLDN37R Ground Loop Isolator 3.5mm to RCA

SKU CH-6KE7-RD31X

Ground loop isolator with 3.5mm female to RCA male connectors filters engine noise and breaks ground loops while driving a six-volt line-level signal

  • Product typeGround Loop Isolators
  • Eliminates engine interference by breaking ground loops
  • 6‑volt line driver boosts weak signals up to 6 V
  • 5 mm female input connects phones and tablets directly
  • RCA male output plugs straight into car‑audio source units
  • Filters charging‑noise from devices powered while playing

3.5mm-to-RCA ground-loop isolator

The Pyle PLDN37R connects a 3.5mm stereo source to an RCA-equipped head unit while breaking the ground path that causes alternator whine. A 6 V line driver boosts signals from 50 mV up to 6 V for cleaner gain structure. It is aimed at installers and drivers who want noise-free playback from phones or portable players in a vehicle.

Noise rejection and power characteristics

The isolator filters engine noise that appears when a device is charging, removing the hum without an external power supply. Passive transformer coupling handles the ground separation, so the unit draws no current and adds no fan noise. The wide 50 mV-to-6 V input range accommodates both low-level phone outputs and higher-voltage line sources.

Connection convenience and compatibility

A 3.5mm female jack accepts standard headphone cables, while RCA male plugs insert directly into amplifier or head-unit inputs. No adapters, software or configuration are required — the device works immediately with smartphones, tablets, MP3 players and similar portable sources. Builders needing balanced XLR or digital optical connections will need a different interface.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $16.99
Pricier than about 58% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand namePyle
Product typeGround Loop Isolators

Questions about this item

How do I connect the 3.5mm female input and RCA male outputs to my car stereo?

Plug the 3.5mm jack from your phone or player into the female stereo input, then insert the two RCA male plugs into the left and right RCA inputs on the head unit; the isolator sits in-line and requires no power connection.

Will the internal transformer or line-driver circuit need replacement after extended use?

The unit is a passive transformer-based isolator with an integrated 6 volt line driver; it has no user-serviceable parts and is designed to last the life of the installation without scheduled maintenance.

At what input voltage does the 6 volt line driver begin to clip during continuous playback?

The specified wide input signal range is 50mv to 6v, so sustained signals above 6 volts will exceed the driver's headroom and cause clipping.

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