Lehle P-ISO

$99.11 to $149.99

1 Critic Review

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1 saved

Page last updated Jun 03, 2026

Pricing and availability

We compare 600+ stores and found this item at 4 stores. Prices updated June 3, 2026.

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4.0 (3)

$149.99

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4.2 (7)

$149.99 New

$134.99 Used (Very Good)

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5.0 (1)

$99.11 20 available New

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4.9 (30)

$107.00 $106.00 $1.00 · All time low

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Price History

Based on price data from 3 merchants for "Lehle P-ISO". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Transform your rig with the Lehle P-ISO, a versatile tool that combines the functionalities of an isolator and DI box into one compact package. Designed for musicians who demand pristine sound quality, the P-ISO ensures no signal loss or hum, making it a reliable companion for any performance or recording session. Its Lehle Transformer HZ is the heart of this device, providing galvanic isolation to eradicate ground-induced interference without altering your audio's transparency or dynamics.

Whether you're balancing high-impedance signals or tackling low-impedance ones, this passive DI box rises to the occasion without needing a power supply. Compact enough to fit under your pedalboard yet robust in its capabilities, the Lehle P-ISO is ideal for re-amping, live performances, or studio applications. It's a must-have for any musician seeking a clean, noise-free signal path.

Key Features:

Galvanic isolation to eliminate hum and interference
Suitable for balanced or unbalanced signals
High-quality Lehle Transformer HZ
Passive design—no power supply required
Functions as both an isolator and a DI box
Input and output: 6.3 mm stereo jacks
Made in Germany for quality assurance

Product specs

Type	Passive Isolator/Direct Box
Polarity Switch	Yes
Inputs	1 x 1/4"
Outputs	1 x 1/4"
Height	1.22"
Width	1.61"
Depth	2.81"
Weight	0.45 lbs.

FAQs

What is the primary function of the Lehle P-ISO?: The Lehle P-ISO is a passive isolator and direct box designed to eliminate ground loop hum and ensure clean signal transfer between audio devices.
Does the Lehle P-ISO require any power supply?: No, the Lehle P-ISO is a passive device and does not require any external power supply to function.
Can the Lehle P-ISO be used with both instruments and amplifiers?: Yes, the Lehle P-ISO is suitable for isolating signals between instruments and amplifiers, preventing unwanted noise and interference.
What is the purpose of the polarity switch on the Lehle P-ISO?: The polarity switch allows you to adjust the phase of the signal, which can help resolve phase cancellation issues when integrating the P-ISO into your audio setup.
How does the Lehle P-ISO connect to other audio equipment?: The Lehle P-ISO features a 1/4" input and a 1/4" output, allowing it to easily connect to instruments, amplifiers, and other audio gear.

Reviews

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PROS

Successfully eliminates ground loop noise in complex stereo setups
No power supply needed, fully passive operation
Maintains sound quality with zero tone loss
Compact design fits easily into any setup
Reliable build quality instills confidence in long-term use
Transforms pedalboard sound to studio-grade quality
Versatile for various configurations, including dual head stereo setups
Effective in eliminating noise with a range of equipment

CONS

May require multiple units for complex rigs

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Lehle P-ISO.

Features and functionality

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The Lehle P-ISO is mentioned as a solution for noise issues, but it's noted for being expensive compared to alternatives like the Behringer HD400.
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Comparisons

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Users compare the Lehle P-ISO to cheaper options like the Behringer HD400 and Harley Benton groundbox for resolving grounding issues.
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Use cases and applications

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The Behringer HD400 is used to eliminate noise when connecting amps to devices like the HX Stomp, indicating its utility in complex setups.
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The Lehle P-ISO may be beneficial for musicians playing in old venues with unreliable power, preventing potential ground loop issues in varied environments.
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User experience

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A user notes that without the ABY box, the high-pitched noise does not occur, suggesting the issue is linked to the switcher's use.
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A user with a heavily modded Orange RV100mk1 amp, using a Plumes cranked, considers the P-ISO to manage noise, especially with fuzz pedals.
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One musician, playing death/grind, doomy, and atmospheric styles, contemplates using the P-ISO to maintain desired feedback while controlling an obscene noise floor.
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Setup and maintenance

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The Lehle P-ISO can be a proactive measure for musicians employing complex setups, such as the 3 cable method, to prevent hum before it starts.
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