---
product_id: 2393648
title: "Premium Direct Injection Audio Box - 2.36\" x 4.09\" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR"
brand: "pyle"
price: "€ 31.29"
currency: EUR
in_stock: true
reviews_count: 13
category: "Pyle"
url: https://www.desertcart.it/products/2393648-premium-direct-injection-audio-box-2-36-x-4-09
store_origin: IT
region: Italy
---

# 50KΩ instrument input impedance Switchable input attenuation (-0dB, -20dB, -40dB) Hum & buzz elimination tech Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR

**Brand:** pyle
**Price:** € 31.29
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game—ditch the hum, keep the vibe!

## Quick Answers

- **What is this?** Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR by pyle
- **How much does it cost?** € 31.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/2393648-premium-direct-injection-audio-box-2-36-x-4-09)

## Best For

- pyle enthusiasts

## Why This Product

- Trusted pyle brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dynamic Signal Control:** Switchable input attenuation lets you tailor signal levels perfectly, preventing distortion in any setup.
- • **Rugged All-Steel Build:** Durable chassis designed for the road warrior, ensuring reliability in every gig or studio session.
- • **Versatile Connectivity:** Supports balanced and unbalanced outputs, making it ideal for live PA systems, recording mixers, and even consumer stereo sampling.
- • **Hum-Free Audio Experience:** Advanced ground lift and passive hum eliminator ensure your live or recorded sound stays clean and interference-free.
- • **Seamless Instrument Integration:** Connect guitars, basses, keyboards effortlessly with ¼” TS input and balanced XLR output for pristine sound clarity.

## Overview

The Pyle Premium Direct Injection Audio Box (PDC21) is a compact, passive DI unit engineered to convert high-impedance, unbalanced instrument signals into low-impedance, balanced outputs. Featuring a 50KΩ input, switchable ground lift, and selectable input attenuation (-0dB, -20dB, -40dB), it eliminates hum and buzz for crystal-clear audio. Built with a rugged steel chassis, it’s perfect for connecting guitars, basses, keyboards, and other audio gear to PA systems or recording mixers, making it an essential tool for professional musicians and audio engineers seeking clean, reliable sound.

## Description

Pylepro model: Pdc211/4'' Instrument to balanced & Unbalance1/4'' Instrument to balanced & unbalanced (1/4''/XLR) direct box construction: All steel chassis ground lift: switch-able ground lift balanced output: 600 balanced XLR jack instrument input: 50K unbalanced TS jack parallel (link) out: 50K unbalanced TS jack input attenuation: switch-able (0dB, -20dB,-40dB) dimension: 4.72'' X 3.01'' X 1.77''The dc-21 is one of the most useful and versatile tools available indispensable in enabling easy interfacing and connection between various audio gear in numerous applications.Pyle Pdc21 is a necessity if you are looking for the biggest quality of sound, With low distortion, noise, and eliminate ground loops. A DI unit, DI box, Direct box, Direct input, direct Injection or simply DI is an electronic device that connects a high impedance, line level, unbalanced output signal to a low impedance mic level balanced input, usually via XLR connector. Dis are frequently used to connect an electric guitar or electric bass to a mixing console's microphone input. The DI performs level matching, balancing, and either active buffering or passive impedance bridging to minimize noise, distortion, and ground loops. Dis do not perform impedance matching. Pyle has been in business for over 35 years, and their manufacturing experience and expertise is easy to see - and hear.

Review: Great box for a great price! - Great direct box for the best price I've seen. Works well... the sound guy at church said it not only gave a stronger signal than my setup had been providing, but it also fixed an annoying hum that he couldn't isolate before (using the church's direct boxes). The only recommendation: with the ground lift button (it's a button, not a switch), maybe either add the word "lift" or switch your on/off indications. Since it's a lift, technically (as printed in the instructions), when it's engaged ("On"), the GROUND is disengaged or off (lifted). Right now, when you look at it, it reads that the GROUND is ON or OFF. For those who work with tech all the time, they probably understand the difference, but others might not. Regardless, once you figure out the right position, it works great.
Review: Works great - For it being $15 or around that price I'd say it's way worth the money. I was looking and saw that a ground plug was around 60 bucks and wasn't going to buy that right away and saw this and bought it instead. It's pretty easy to use especially with the diagram on it. I wasn't sure if it was going to play through the amp or not but it does and I haven't tested it on a saw yet so I can't say anything about that. For the ideas it wants talked about. Doesn't need a battery, the quality is good.

## Features

- ¼ “ DEVICE CONNECTOR: Provides a variety of DI solutions with its ¼ inch device connector and detachable AC power cord for live sound recording applications. It allows you to easily connect keyboards, guitars & outboard signal processors
- PROVIDES CLEAN AUDIO: Useful for connecting unbalanced signals from sources submixers, effects processors & keyboards to a main PA or recording mixer. This impedance transformer also has buzz & hum cancellation ability
- EASILY CONNECTS INSTRUMENTS: Getting the signal of a musical instrument to the PA system is easier with this direct box. Just connect the electric bass, guitar, keyboard or other processors to the ground lift adapter & enjoy pure & clean audio
- VERSATILE DIRECT BOX: Aside from music instruments, the DI unit can also be connected to the line output of a boom box or consumer stereo system if you want to sample old records. The hum eliminator is used for connecting unbalanced devices as well
- Premium Direct Injection Audio Box - Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR, Black

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0027V760M |
| Best Sellers Rank | #305 in Musical Instruments ( See Top 100 in Musical Instruments ) #1 in Recording Signal Direct Boxes |
| Color Name | Black |
| Compatible Devices | Microphone, Musical Instrument |
| Compatible Phone Models | audio |
| Connector Type | XLR |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,248) |
| Date First Available | April 27, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11.6 ounces |
| Item model number | PDC21 |
| Material Type | steel |
| Product Dimensions | 1.8 x 3.3 x 5 inches |
| Size | 1 Count (Pack of 1) |
| Speaker Amplification Type | passive |

## Product Details

- **Brand:** Pyle
- **Connector Type:** XLR
- **Cable Type:** XLR
- **Compatible Devices:** Microphone, Musical Instrument
- **Special Feature:** Anti Noise

## Images

![Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR - Image 1](https://m.media-amazon.com/images/I/71GCEiuNx0L.jpg)

## Questions & Answers

**Q: From the description: "it is also a convenient tool for musicians as it can power up to 10 effects pedals." Is this true? How?  No power output.**
A: It's a passive unit and it will not power up any equipment  like guitar or keys. One end  has  unbalanced input (TR) and parallel out  the other end, has balanced  XLR so it can be used in a XLR mic input on a mixer.  The main purpose is so in a studio setting a guitar player can go into an amp via (parallel out ) and XLR to the  input on PA  /mixing board to record effects while recording . This will not solve your issue, Example -in my band we rehearse in my studio garage my bass player doesn't bring his amp-( to heavy ) he plugs his bass in to a DI box with 1/4 inch TR (Tip Ring) and the other end I use a XLR cable from the DI box to Mic input on my mixing board. It increases the impedance --Unbalanced  to Balanced.. It also has a ground lift to eliminate ground nose (BUZZ)  Look for a book "The Ultimate Live Sound Operators Handbook" by Bill Gibson It explains everything. Hope I was helpful.

**Q: Can I use this with an audio interface to reduce clipping on Guitar Rig 5?**
A: Yes. It will do this by converting then line input from your instrument into a balanced xlr for your audio interface. That is exactly why I purchased this

**Q: I need to transform a xlr balance output to and an unbalance one, can i use this device? looking the photo the xlr can be input or output! thanks**
A: Hi, yes you can use this unit. You may check other details of the unit by visiting our website pyleaudio.com. Type the model number on the search box PDC21 for more details. Thank you.

**Q: Could I use my balanced 1/4 to XLR cable to replace DI box?**
A: i tried to use balanced 1/4 with xlr adapter, and never got a reliable connection. di box worked fine.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great box for a great price!
*by S***. on December 9, 2025*

Great direct box for the best price I've seen. Works well... the sound guy at church said it not only gave a stronger signal than my setup had been providing, but it also fixed an annoying hum that he couldn't isolate before (using the church's direct boxes). The only recommendation: with the ground lift button (it's a button, not a switch), maybe either add the word "lift" or switch your on/off indications. Since it's a lift, technically (as printed in the instructions), when it's engaged ("On"), the GROUND is disengaged or off (lifted). Right now, when you look at it, it reads that the GROUND is ON or OFF. For those who work with tech all the time, they probably understand the difference, but others might not. Regardless, once you figure out the right position, it works great.

### ⭐⭐⭐⭐⭐ Works great
*by L***N on November 19, 2025*

For it being $15 or around that price I'd say it's way worth the money. I was looking and saw that a ground plug was around 60 bucks and wasn't going to buy that right away and saw this and bought it instead. It's pretty easy to use especially with the diagram on it. I wasn't sure if it was going to play through the amp or not but it does and I haven't tested it on a saw yet so I can't say anything about that. For the ideas it wants talked about. Doesn't need a battery, the quality is good.

### ⭐⭐⭐⭐⭐ Sounds crisp and clear
*by D***N on January 13, 2026*

Used on mic inline w amp and works well

## Frequently Bought Together

- Pyle Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR
- PYLE-PRO Premium Direct Injection Audio Box - Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass - 1/4 Inch Impedance Transformer Connector to Balanced & Unbalanced XLR-PDC22 , Black
- Cable Matters 2-Pack 1/4 Inch TS to TS Electric Guitar Cable - 6ft, Guitar Amp Cord, Instrument Cable for ElectricGuitar, Mandolin, Bass AMP, Keyboard, Mixer, Equalizer

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-23*