Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated .

Sweetwater
5.0 (2)
$339.99
Guitar Center
5.0 (2)
$339.99
Amazon
4.8 (15)
$339.99 New
$305.99 Used (Like New)
Reverb
$299.82 New
$279.99 Used
Musician's Friend
5.0 (1)
$339.99
B&H
5.0 (1)
$339.99
Thomann
4.8 (18)
$389.00 $385.00 $4.00 · All time low

Average Price: $334

High-end/Boutique

$119

$300+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 7 merchants for "Radial Engineering Twin-Iso". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Transform your sound clarity and eliminate ground loop issues with the Radial Engineering Twin-Iso, a powerhouse of pristine audio performance. This top-tier 2-channel, balanced line-level isolator is the solution you've been seeking for your studio recording, live sound, and broadcast setups. With its robust build and superior isolation capabilities, the Twin-Iso stands out not just as a piece of equipment but as a guardian of pure sound.

At the heart of the Twin-Iso are the Jensen Audio Transformers, renowned for their exceptional audio fidelity. These transformers ensure that your sound is transmitted without compromise, preserving the integrity of your audio from input to output. The Radial Twin-Iso is engineered to tackle ground loop problems head-on, providing a clear path for your audio signal and eliminating the buzz and hum that can plague interconnected audio gear. Whether you’re in a high-end recording studio, setting up for a live performance, or in a broadcast environment, the Twin-Iso’s performance is unmatched.

Robustly constructed to withstand the rigors of tour life and studio use, the Twin-Iso features a 14-gauge steel shell and a non-slip pad that ensures it stays in place, offering both electrical and mechanical isolation. For professionals who demand reliability and sound integrity, the Twin-Iso is a critical tool in achieving a clean, professional sound.

Key Features:

  • Equipped with Jensen Audio Transformers for unmatched audio performance
  • Eliminates ground loop buzz and hum for pristine sound clarity
  • 2 +4dB line-level floating channels with XLR input and output connectors
  • Capable of handling up to +21dB without distortion
  • Linear frequency response from 10Hz-40kHz
  • Designed for use in studio recording, live sound, and broadcast environments
  • 14-gauge steel construction and non-slip pad for durability and stability

Owner's manual

Radial Engineering Twin-Iso User Manual

Product specs

Type Passive Line Isolator
Channels 2
Polarity Switch Yes
Ground Lift Yes
Inputs 2 x XLR
Outputs 2 x XLR
Height 2"
Width 3.3"
Depth 5"
Weight 1.55 lbs.

FAQs

What is the primary function of the Radial Engineering Twin-Iso?

The Radial Engineering Twin-Iso is a passive line isolator designed to eliminate ground loops and reduce noise in audio systems by providing clean, isolated signal paths.

Does the Radial Twin-Iso require any power supply to operate?

No, the Radial Twin-Iso is a passive device and does not require any external power supply to function.

What types of connections does the Radial Twin-Iso provide?

The Radial Twin-Iso features 2 XLR inputs and 2 XLR outputs, allowing for balanced line-level connections.

Can the Radial Twin-Iso handle stereo signals?

Yes, the Radial Twin-Iso is a two-channel line isolator, making it suitable for handling stereo signals.

How does the ground lift feature on the Radial Twin-Iso work?

The ground lift switch on the Radial Twin-Iso helps eliminate hum and buzz caused by ground loops by disconnecting the ground connection between input and output.

Is the Radial Twin-Iso suitable for live sound applications?

Yes, the Radial Twin-Iso is ideal for live sound applications, providing noise-free audio by isolating equipment and preventing ground loop issues.

Reviews

PROS

  • Effectively eliminates ground loops, buzzes, and unwanted noise

  • Built like a tank, highly durable and rugged

  • Provides true-to-original sound with no coloration

  • High-quality Radial transformers maintain excellent audio integrity

  • Perfect for isolating balanced and unbalanced equipment

  • Ideal for professional settings, including television collaborations

  • No noticeable loss in audio quality when used

CONS

  • No longer uses the renowned Jensen transformers

  • Can be pricey for the current transformer specification

  • Some users report introduction of crackle or peaking noises

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Radial Engineering Twin-Iso.

Features and functionality

  • The Radial Twin-Iso maintains line level integrity while isolating ground and keeping the signal balanced.

    Source

Use cases and applications

  • Ideal for setups with multiple zones, especially when dealing with different power phases, reducing hum issues effectively.

    Source

Comparisons

  • The Twin-Iso is more robust than ISO-BLOX, which are best for occasional use, while the Twin-Iso suits everyday applications.

    Source

Other

  • Alternatives like the Proco IT4A are suggested for rack installations, offering pre-wired convenience for multi-channel isolation.

    Source

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Genre Usage

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