# 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 **ASIN:** B0027V760M **Canonical URL:** https://crowcrowcrow.com/p/pyle-direct-injection-audio-box-2-36-4-09-passive-unit-hum-eliminator-input-attenuator/sdq6161 **Category:** electronics **Subcategory:** Products **Availability:** in_stock **Price (INR, all-inclusive):** ₹4,858 **Discount:** 31% **Customer rating:** 4.50/5 from 3,581 ratings ## Description Pyle PDC21 Passive DI Box connects instruments like guitars and basses to mixers, eliminating hum and noise for clean audio. Features switchable ground lift and attenuator. All-steel chassis. Imported from USA, duties included. Arrives in 16-18 days. ## Highlights - Eliminates Ground Loops & Hum — Switchable ground lift and advanced circuitry actively cancel buzz and hum, ensuring a clean signal path from your instrument to the mixer, crucial for live performances and studio recording. - Adjustable Input Attenuation — Selectable 0dB, -20dB, or -40dB attenuation levels allow seamless integration with various signal sources, from quiet passive pickups to hot active outputs, preventing signal clipping and distortion. - Robust All-Steel Chassis — Built with a durable steel enclosure, this DI box is designed to withstand the rigors of stage use and frequent transport, ensuring long-lasting reliability for musicians on the go. - Versatile Connectivity Options — Features 1/4'' instrument input, parallel link out, and a balanced XLR output, allowing flexible connections to mixers, PA systems, and recording interfaces for guitars, basses, keyboards, and more. ## 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, 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 1. 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 2. 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 3. 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 4. 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 ## Product details | Field | Value | |---|---| | 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 | | 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 ₹4,858 — ₹4,858 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 | | 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 | ## Frequently asked questions ### 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, 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. ## Compliance No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging. ## Images 1. https://images.crowcrowcrow.com/B0027V760M-0.webp 2. https://images.crowcrowcrow.com/B0027V760M-3.webp 3. https://images.crowcrowcrow.com/B0027V760M-6.webp 4. https://images.crowcrowcrow.com/B0027V760M-9.webp 5. https://images.crowcrowcrow.com/B0027V760M-12.webp 6. https://images.crowcrowcrow.com/B0027V760M-15.webp --- Source: https://crowcrowcrow.com/p/pyle-direct-injection-audio-box-2-36-4-09-passive-unit-hum-eliminator-input-attenuator/sdq6161 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 16-18 days. Prices are all-inclusive (duties + GST).