What is the difference between an active and a passive direct box?

A passive direct box, like the Pyle PDC21, uses a transformer and needs no power, working well with high-output or active-electronics instruments. An active direct box contains a powered preamp (via phantom power or battery) and is better suited to low-output passive pickups such as many electric guitars and basses. Choose based on your instrument's output level and whether power is available.

Do I need a direct box if my mixer already has instrument inputs?

A direct box converts a high-impedance unbalanced instrument signal into a balanced low-impedance signal, letting you run long cable lengths to a mixer or recording interface without noise or signal loss. The Pyle PDC21 also includes a ground lift switch to remove hum. If your setup involves long cable runs or hum issues, a DI box like this improves signal integrity.

How do I connect my guitar to a mixer using the Pyle PDC21 DI Box?

Connect your guitar's 1/4'' output to the Pyle PDC21's 'Instrument Input' TS jack. Then, connect a balanced XLR cable from the DI box's 'Balanced Output' to your mixer's microphone input. Use the attenuator if your guitar signal is too hot, and engage the ground lift switch if you hear hum.

Can I use the Pyle PDC21 DI Box with keyboards and other instruments?

Yes, the Pyle PDC21 is versatile and can connect keyboards, bass guitars, and other line-level unbalanced sources to your PA system or recording mixer. Its impedance transformer and hum cancellation abilities ensure a clean audio signal from various instruments and outboard signal processors.

How to buy an original Pyle PDC21 DI Box in India?

To buy an original Pyle PDC21 DI Box in India, purchase from crowcrowcrow.com. We import directly from authorized US retailers and authorized brand partners, ensuring factory-sealed, authentic products. All customs duties and GST are included in the listed INR price, and orders are shipped via ExpressBox with tracking for a transparent, hassle-free experience.

Does the Pyle PDC21 DI Box eliminate ground loop hum?

Yes, the Pyle PDC21 features a switchable ground lift designed specifically to eliminate ground loop hum and other noise issues. This is crucial for achieving a clean, professional audio signal when connecting instruments or audio gear to a mixer or PA system.

What is the impedance of the Pyle PDC21 DI Box inputs and outputs?

The Pyle PDC21 has a 50K Ohm unbalanced TS jack for the instrument input and parallel link out. The balanced XLR output is 600 Ohm, designed to interface with microphone inputs on mixers and PA systems, ensuring proper signal level and impedance matching.

Pyle PDC21 Passive DI Box Hum Eliminator | Connect Guitar Bass Keyboards

Name: Pyle PDC21 Passive DI Box | 10.5 cm x 7.6 cm x 4.5 cm (4.1" x 3.0" x 1.8") Hum Eliminator
Brand: Pyle
SKU: sdq6161
Price: 5643.00 INR
Availability: InStock

About this item

The Pyle PDC21 Passive DI Box is an indispensable tool for clean audio interfacing. Its all-steel chassis houses a switchable ground lift and input attenuator (0dB, -20dB, -40dB) to eliminate noise, distortion, and ground loops. This passive DI unit connects high-impedance, line-level unbalanced outputs to low-impedance microphone-level balanced inputs, ideal for guitars, basses, keyboards, and signal processors. Imported from authorized US retailers and authorized brand partners, all customs duties and GST are included in the listed INR price.

This DI box provides a 600 Ohm balanced XLR output and 50K unbalanced TS jacks for instrument input and a parallel link out. It effectively cancels buzz and hum, ensuring pure, clean audio for live sound recording applications. The versatile design also allows connection to consumer stereo systems for sampling old records.

For musicians in India, the Pyle PDC21 offers a reliable solution for professional audio setups. Its robust construction and hum-eliminating capabilities ensure consistent performance. All orders are shipped via ExpressBox with tracking, and all import duties and GST are pre-paid, providing a transparent and hassle-free purchase experience.

Key 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

Why choose this product

Professional Sound Clarity

The Pyle PDC21 Passive DI Box is engineered to deliver pristine audio by converting unbalanced instrument signals to balanced mic-level signals. Its passive design, coupled with a transformer, effectively eliminates ground loops and hum, providing a noise-free signal path essential for studio-quality recordings and live sound reinforcement. Unlike basic adapters, this unit offers precise impedance matching and attenuation controls, ensuring optimal signal integrity from your guitar, bass, or keyboard to the main PA or recording mixer. Imported from authorized US retailers and authorized brand partners, it guarantees authentic performance standards.

Ideal for Musicians & Broad Use

This DI box is perfect for guitarists, bassists, and keyboard players seeking a clean signal. It's also useful for connecting line-level outputs from submixers, effects processors, or even consumer stereo systems for sampling. If you require a robust, hum-free connection for long cable runs or need to interface diverse audio gear, the PDC21 is a solid choice. However, if your instrument has a very weak passive pickup or you need active buffering for extremely long distances, an active DI box might offer more gain and signal strength.

How to use

Plug your instrument's 1/4'' output cable into the 'Instrument Input' jack on the Pyle PDC21 DI Box. Ensure a secure connection for optimal signal transfer. — Connect Instrument
Use a balanced XLR cable to connect the DI box's 'Balanced Output' to an available microphone input on your mixing console or PA system. Ensure the XLR connector is fully seated. — Connect to Mixer
If your instrument signal is too strong, engage the input attenuator switch to -20dB or -40dB. If you experience hum or buzzing, activate the 'Ground Lift' switch to isolate the ground and eliminate the noise. — Adjust Settings
Perform a soundcheck to ensure the signal is clean and at the desired level. The parallel 'Link' output can also be used to send the signal simultaneously to an amplifier or another device. — Test and Record

Example scenarios

Typical situations where Pyle PDC21 Passive DI Box | 10.5 cm x 7.6 cm x 4.5 cm (4.1" x 3.0" x 1.8") Hum Eliminator helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

A musician in Delhi needs to connect their bass guitar to a PA system for a gig, ensuring no hum or signal loss over long cable runs.

How this product helps

The Pyle PDC21 Passive DI Box converts the bass's signal to a balanced, low-impedance output, allowing long XLR cables to the mixer without noise. Its steel chassis withstands transport, and the ground lift eliminates venue hum.

Scenario 2

Illustrative example

Where it helps

A home studio user in Bangalore wants to record clean audio from a keyboard or sample old vinyl records into their computer's audio interface.

How this product helps

The PDC21 connects keyboards or stereo systems to the interface's mic input, providing a clean signal. Its attenuator handles hot signals, and the hum eliminator ensures clear recordings, especially useful when sampling from older equipment.

Specifications

Composition

Input Attenuation	Switchable (0dB, -20dB, -40dB)
Ground Lift	Switchable
Balanced Output	600 Ohm XLR Jack
Instrument Input	50K Ohm Unbalanced TS Jack
Parallel (Link) Out	50K Ohm Unbalanced TS Jack

Usage

Power Source	Passive (no external power or battery required)
Application	Connects instruments (guitar, bass, keyboard) and line-level unbalanced sources to mic-level balanced inputs.
Cost per use	1 unit at ₹5,643 — ₹5,643 per unit
Shelf life after opening	N/A (Durable electronic component)
Contraindications	May not provide sufficient gain for very weak passive pickups or extremely long cable runs without signal loss; consider an active DI box in such cases.
Allergens / common irritants	None

How we compare

Feature	Pyle PDC21 Passive	Others
Type	Passive DI Box	Passive or Active DI Box (varies by brand)
Hum Elimination	Switchable Ground Lift	Ground Lift Switch (common)
Input Attenuation	Switchable (-20dB, -40dB)	Often fixed or limited attenuation
Build Quality	All-Steel Chassis	Steel or plastic chassis (varies)
Cost per unit	₹5,643 per unit	₹800 - ₹2,500 per unit (varies)

SKU	sdq6161
GTIN	00068888894784
Brand	Pyle
Model Name	PDC21
Material	Steel
Color	Charcoal
Dimensions (W x H x L)	11.9 cm x 7.6 cm x 4.5 cm (4.72'' x 3.01'' x 1.77'')
Weight	0.38 kg (0.84 lbs)
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

Attributes	Current Pyle PDC21 Passive DI Box \| 10.5 cm x 7.6 cm x 4.5 cm (4.1" x 3.0" x 1.8") Hum EliminatorBuy Now	Pyle-Pro PDC22 Passive DI Box \| 1/4 Inch Input to XLR Output Hum Eliminator with AttenuatorBuy Now	Pyle Premium Direct Injection Audio Box - Passive DI Unit Hum Eliminator with Input Attenuator, 1/4'' Connector to XLR, Black (1-Pack)Buy Now	Pyle Compact Mini Hum Eliminator Box - 2 Channel Passive Ground Loop Isolator with 1/4" TRS Phone & XLR Input/OutputBuy Now	J K Professional MIC-J 071S Headset Microphone Beige \| Compatible with Sennheiser G3/G4, Line 6 X2, 1/8" Locking Screw PlugBuy Now	D'Addario NYXL09544 Electric Guitar Strings, Super Light Plus 9.5-44 (1-Pack)Buy Now	Seymour Duncan SH-4 JB Model Bridge Humbucker Pickup Black \| High Output for Rock & BluesBuy Now
Spec
Price

Pyle PDC21 Passive DI Box | 10.5 cm x 7.6 cm x 4.5 cm (4.1" x 3.0" x 1.8") Hum Eliminator

Product details

Frequently bought together

Crowcrowcrow: The Only Safe Lane for US-Market Exclusives

Tested and Trusted · Always Original & 100% Imported