Direct Boxes

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Whirlwind PCUSB Direct Box - USB-B Input - Stereo XLR Balanced Output
Whirlwind
Item# WW-PCUSB
The Whirlwind pcUSB converts the digital audio from USB outputs to high quality analog, stereo, balanced audio for easy connection to PA systems, mixing boards, etc. USB 2.0 compliant with no device driver requied. Operating power is supplied from the USB port in the host device. Sample rates of 32 kHz, 44.1 kHz and 48 kHz are supported at 16 bits. A USB hookup cable is included. Digital signal is input via a standard USB Type B jack. Output is via left and right balanced XLRs. A digital 0...
Our Price: $255.00
Availability: In Stock
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Radial R800 1100 Pro DI Full Range Passive Direct Box
Radial Engineering
Item# RAD-PRODI
2 Types Available
The Radial Pro DI is a passive direct box that combines exceptional audio performance with solid dependable construction, making it the ideal general duty direct box for stage and studio. The heart of the ProDI is a custom wound Radial transformer. It features an exceptionally high 140k Ohm input impedance to reduce loading while enabling the ProDI to handle extreme signal levels at all frequencies without distortion. This is further improved upon with an internal MuMETAL shield to protect...
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Our Price: $129.99
Availability: In Stock
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Radial JDI Passive Direct Box with Jensen Transformer
Radial Engineering
Item# RAD-JDI
The Radial JDI is a passive direct box designed to handle extreme signal levels without distortion of any kind. Unlike an active DI that is limited by the buffering amplifier's rail voltage, the JDI employs a Jensen audio transformer as the engine. Jensen transformers are legendary in their ability to gracefully handle transients while delivering a smooth, warm sounding Bessel curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and with virtually zero phase...
Our Price: $249.99
Availability: In Stock
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Radial J48 Stereo Active DI for Acoustic Guitar & Bass with Extra Headroom and High-Pass Filter
Radial Engineering
Item# RAD-J48S
The Radial J48 Stereo is a high performance active direct box designed for professional touring and studio recording. It features the same award-winning signal path that has made the single channel J48 the most specified active direct box on tour today. And with users as diverse as Paul McCartney, Tommy Emmanuel and Joe Chiccarelli, you can be sure it will meet the most demanding qualifications. The design begins with a rugged 14 gauge steel construction and a bookend design that protects sensitive...
Our Price: $379.99
Availability: In Stock
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Radial Engineering Backtrack Stereo Backing Track Switcher with 3.5mm & 1/4 Inch Inputs and Isolated DI Outs
Radial Engineering
Item# RAD-BACKTRACK
The Backtrack is a compact stereo audio switcher, perfect for bands running redundant backing tracks on stage. Connect both source devices to the Backtrack via ¼" or 3.5mm connectors, and switch between them or mute them altogether using the front panel controls or a JR-2 remote footswitch. A headphone output with level control allows you to check either input at any time, and ¼" monitor outputs feed powered speakers for playback on stage. Dual XLR outputs feed the...
Our Price: $459.99
Availability: Usually Ships in 5-14 Days
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Radial Engineering JDI-STEREO R800-1012 Passive DI Stereo for Acoustic Guitar/Bass/Keyboards
Radial Engineering
Item# RAD-JDI-R8001012
This Radial Engineering R800-1012 JDI Stereo is a high performance 2-channel passive direct box for live concert touring and professional recording applications, featuring premium Jensen transformers for exceptional audio performance. Features: Jensen transformer equipped passive DI Eliminates hum and buzz from ground loops Virtually zero phase & harmonic distortion Exceptional signal handling and noise rejection Compact stereo format for twice the performance Specifications: Harmonic...
Our Price: $379.99
Availability: In Stock
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Radial JPC Stereo PC-AV Direct Box
Radial Engineering
Item# RAD-JPC
No one builds a stereo direct box like The Radial JPC. This Stereo PC-AV Direct Box has been specifically designed for use with sound cards and other consumer electronic products to allow these to be connected to a professional sound system. Its unique design combines the advantages of transformer-isolated inputs with an active drive circuit, giving you the `best of both worlds' in a compact and extremely flexible and road worthy package. The Radial JPC was designed to help solve the buzz and...
Our Price: $249.99
Availability: In Stock
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Radial Pro48 Active Direct Box - 48V Phantom Powered
Radial Engineering
Item# RAD-PRO48
The Radial Pro48 is a compact high-performance 48V phantom powered active direct box designed specifically for todays high output instruments. The Pro48's innovative internal switching power supply significantly increases headroom producing less distortion while yielding a smooth, linear response that extends from 20Hz to well above 40kHz. This results in natural, uncolored signal that is as good or better than DI boxes costing several times more. The superior performance makes the Pro48 an ideal...
Our Price: $129.99
Availability: In Stock
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Radial Engineering BT-Pro V2 Bluetooth Stereo Direct Box-Wireless Receiver with Balanced Stereo Direct Interface Outputs
Radial Engineering
Item# RAD-BT-PRO-V2
The BT-Pro V2 is a Bluetooth-enabled direct box that connects wirelessly to smartphones, tablets, and other mobile devices and provides a pair of balanced analog audio outputs to feed a PA system. Each BT-Pro V2 has a unique identifier, allowing multiple units to be used within the same building. The latest model of the BT-Pro can also be powered via 48V phantom from a mixing console. Wireless connection, professional audio The BT-Pro V2 makes it easy to quickly connect to any...
Our Price: $349.99
Availability: In Stock
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Whirlwind pcDI Direct Box with RCA and 1/8in Inputs
Whirlwind
Item# WW-PCDI
The Whirlwind pcDI is perfect for interfacing the outputs of CD players, computer sound cards, iPODs® / MP3 players, tape decks, etc. with professional, balanced, low impedance equipment. This unit contains two separate DIs - input your signals with one 3.5mm (1/8") mini TRS stereo jack (tip=left +, ring=right +, sleeve=common negative) or two sets of color coded RCA phono type input and through jacks. Output is via corresponding color coded XLRs. Features: Color coded RCA phono in / through...
Our Price: $204.00
Availability: In Stock
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Radial J48 Active 48V Phantom Powered Direct Box w/Digital Switching Supply
Radial Engineering
Item# RAD-J48
The Radial J48 is a great sounding active direct box that has been optimized to produce maximum headroom while working within the limited current available from standard 48V phantom power. By employing a unique switching power supply, the J48 is capable of peak transients to 9 volts without choking. The result is lower harmonic distortion, half the inter-modulation distortion and significantly improved dynamics over other DIs. Features include a -15dB pad, 180degree polarity reverse, a unique...
Our Price: $249.99
Availability: In Stock
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JENSEN JT-DB-E Direct Box Transformer
Jensen Transformers
Item# JT-DB-E
When loaded by the 1 kS input impedance typical of mic preamplifiers, this transformer has a 140 kS input impedance, making it ideal for high impedance sources. It can be used with or without an active buffer as a "direct box" for electric guitars or synthesizers. A 30 dB magnetic shield package is standard. Features: Converts unbalanced line levels to balanced mic level output Stops "hum and buzz" problems in musical instrument hook-ups Allows use of long cables without high frequency loss High...
Our Price: $99.99
Availability: Usually Ships in 5-14 Days
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Whirlwind PCDIHW Direct Box Dual with RCA 1/4 Inch Inputs 1/8 Inch Hardwired Input Tail 30 Inch
Whirlwind
Item# WW-PCDI-HW
The Whirlwind pcDIhwb is a PCDI with a hard wired tail terminated with a stereo 3.5mm plug, perfect for interfacing the outputs of CD players, computer sound cards, iPODs / MP3 players, tape decks, etc. with professional, balanced, low impedance equipment (with no chance of losing the cable). This unit contains two separate DIs - input your signals with one hard wired, 30 inch 3.5mm (1/8") mini TRS stereo plug, two sets of color coded RCA phono type input and through jacks or 1/4" TS input jacks....
Our Price: $221.00
Availability: Usually Ships in 5-14 Days
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RDL TX-LC2 Unbalanced to Balanced Line Combiner
Radio Design Labs
Item# TX-LC2
The RDL TX-LC2 is the ideal choice in installations requiring the active, isolated mixing of two unbalanced line-level audio sources to feed a balanced (or unbalanced) audio line. The input circuits are high-impedance, line-level (-10 dBV) and are each isolated from each other. Therefore the modules may be used to bridge an unbalanced stereo source without affecting the stereo separation. The output from the TX-LC2 is a mono mix of the stereo signal. Gain of the combined signals is adjustable...
Our Price: $138.67
Availability: In Stock
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Rolls HR187 Stereo Professional Bluetooth Direct Box
Rolls Corporation
Item# RLS-HR187
The Rolls HR187 Bluetooth Audio DI is the perfect solution for converting Bluetooth audio to a professional audio system. Link the HR187 to any Bluetooth device from a laptop, tablet, smart phone, or other mobile device, then connect to any XLR, RCA, or 1/8" stereo or mono audio system. The steel chassis provides durability that will last, and the proprietary radome antenna technology gives an enhanced reception range. Features: Balanced line level XLR stereo or mono outputs and a Stereo...
Our Price: $159.00
Availability: Ships Factory Direct, Typically in 3-10 Business Days
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On Stage Stands DB100 Consumer to Pro DI - Laptop DI Box - 3.5 mm Plug to Mic-Level XLR Output
On-Stage Stands
Item# OSS-DB100
The DB100 Laptop DI Box eliminates noise and ground loops that often occur when using consumer audio devices with a PA system. Simply connect its 3.5 mm plug to the headphone jack of a laptop or digital music player, and this compact DI automatically converts the audio signal to a balanced, mic-level XLR output suitable for use with high-powered amplifiers. The volume knob enables additional adjustment of the output level while the ground-lift switch provides control over hum caused by ground...
Our Price: $68.95
Availability: Usually Ships in 5-14 Days
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ARX AV-DI Audibox AV DI Stereo AV Active DI Box Stereo Converter
ARX America
Item# ARX-AV-DI
Stereo AudioVisual Active Direct box, with dual RCA or stereo mini jack input and dual XLR outputs. The AV DI is ideal for interfacing computer sound cards with pro sound systems. Heavy duty all-steel chassis, -20 dB Pad switch, plus Phantom or 12 - 15V DC power options. Permanent soft audio ground network prevents ground loops, providing pristine audio quality. Ideal for interfacing any consumer stereo audio signal (especially notebook computer sound cards) with the balanced inputs of professional...
Our Price: $263.12
Availability: Usually Ships in 5-14 Days
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Radial BigShot ABY True Bypass Switcher
Radial Engineering
Item# RAD-BSHOTABY
The Radial BigShot ABY is a compact ABY switcher that enables you to either switch between two amplifiers or combine the signal when you want both amps to play at the same time. Designed for the purist, this true-bypass ABY switcher is completely passive meaning that there are no tone altering buffers in between the guitar and the amplifier. With the BigShot ABY, you get the pure tone from your guitar plugged direct into your amp! To add versatility, the BigShot ABY is also equipped with a separate...
Our Price: $129.99
Availability: Usually Ships in 5-14 Days
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Radial Engineering HDI High-Definition Studio-Grade Direct Box with Transformer Saturation - Line Output
Radial Engineering
Item# RAD-HDI
The Radial HDI is a studio-quality direct box designed to create exceptional recordings with any instrument, utilizing premium Jensen transformers and a unique Color control that provides an entirely new yet familiar-sounding sonic palette to experiment with. Instant Gratification Despite the complex circuitry housed within the unit, the HDI has an elegant set of controls that allows the musician or engineer to dial up a record-ready sound with a minimal amount of tweaking required....
Our Price: $949.99
Availability: Usually Ships in 5-14 Days
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Rolls DB425 4 Channel Audio Direct Interface with Balanced XLR Outputs - 35kHz-20kHz
Rolls Corporation
Item# RLS-DB425
Discover flawless audio connectivity through the innovation of the Rolls DB425 Audio Direct Interface. This ingenious adapter redefines audio connectivity, powered by custom-made, fully potted balanced nickel-laminated transformers, ensuring an unparalleled studio signal quality. Unlike its active counterparts, the DB425 operates as a passive device, eradicating the need for power sources and seamlessly integrating into your setup with absolute ease. Meticulously engineered for precision,...
Our Price: $249.00
Availability: Usually Ships in 5-14 Days
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Palmer Audio PAN02 DI Box active
Palmer Audio
Item# PLM-PAN02
Standard active DI box. Can be operated with 9 V batteries or 48 V phantom power. High-impedance input; higher output level than with a passive DI box. Active circuitry allows for high input impedance ( 1 meg. ohm) and higher input sensitivity (typical difference between in and out -4 dB). Maximum output impedance with phantom power operation +10 dB. Output: transformer balanced. The special "floating ground" circuitry enables ground lift even during phantom power operation. Metal case 110 x 73...
Our Price: $89.99
Availability: Usually Ships in 5-14 Days
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Radial X-Amp Active Re-Amplifier
Radial Engineering
Item# RAD-XAMP
The Radial X-Amp is an active re-amping device that presents the engineer / producer with a new and innovative creative tool that allows a pre-recorded track from a line level device to drive two guitar amplifiers or effect pedals simultaneously. This opens the door to explore new musical sounds and spur on the creative process. Following the critically acclaimed Radial JD7 Injector, the X-Amp employs a unique Class-A circuit design that has been optimized for use with guitars. Using the X-Amp...
Our Price: $249.99
Availability: Usually Ships in 5-14 Days
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Palmer Audio PAL-PBRIDGE4APLUS 19-Inch 4 Channel Active DI Box/Isolation Box - 9V DC Power Supply Included
Palmer Audio
Item# PLM-PBRIDGE4PLUS
The Palmer Audio BRIDGE 4A+ is a multifunctional device: each of the four channels can be used independently as an active DI box, a line isolation box, or a booster. The input combo socket accepts unbalanced and balanced signals. The outputs are designed as two transformer-balanced XLR sockets per channel (one on the front and one on the rear). The galvanic isolation via transformer eliminates hum loops, and the ground lift switch can also be used to eliminate noise and interference...
Our Price: $519.99
Availability: Usually Ships in 5-14 Days
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DSan LSP-3 Multi-Input Passive Direct Box to Dual XLR Outputs for Computers - 1/8-Inch and 1/4-Inch Stereo TRS / RCA
DSan Corporation
Item# DSA-LSP-3
The D San LSP-3 is a passive direct box; you may think of it as an "extension cord" for your crowded audio mixer. It provides 1/8" and 1/4" stereo TRS jacks to accept headphone-level computer or instrument audio with loop out RCA phono; 1/4" TRS mono jacks to accept low-level signals from instruments or media players; and an 1/8" stereo plug to capture headphone audio from computers, cell phones or media players. There is volume control, and a selector switch for L, R or L+R combined...
Our Price: $75.00
Availability: Usually Ships in 5-14 Days
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Switchcraft 314DI Audio Stix Instrument Passive Direct Box
Switchcraft
Item# SW-314DI
An addition has been added to the popular AudioStix line of premium pro audio products. The 314DI is a pocket size version of Switchcraft's standard high quality DI Box series of products. Converts the unbalanced outputs of guitars, keyboards and other instruments with line-out level to balanced, mic level signals that can be connected to audio consoles and mic preamps. Features: ¼" Feed Thru - allows for connection to multiple devices such as an amp and a tuner; two amps and much more. Switchcraft...
Our Price: $129.99
Availability: Usually Ships in 5-14 Days
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Direct Boxes from Markertek are available in single & multichannel configurations and are engineered to precision specifications. Match balanced and unbalanced audio signals (match computers, instruments, film projectors and phonographs to professional audio components), mic to line level and vice-versa. We stock direct boxes from leading manufacturers like Whirlwind, Radial Engineering, ARX America and ART.

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Whirlwind PCUSB Direct Box - USB-B Input - Stereo XLR Balanced Output

Radial R800 1100 Pro DI Full Range Passive Direct Box

Radial JDI Passive Direct Box with Jensen Transformer

Radial J48 Stereo Active DI for Acoustic Guitar & Bass with Extra Headroom and High-Pass Filter

Radial Engineering Backtrack Stereo Backing Track Switcher with 3.5mm & 1/4 Inch Inputs and Isolated DI Outs

Radial Engineering JDI-STEREO R800-1012 Passive DI Stereo for Acoustic Guitar/Bass/Keyboards

Radial JPC Stereo PC-AV Direct Box

Radial Pro48 Active Direct Box - 48V Phantom Powered

Radial Engineering BT-Pro V2 Bluetooth Stereo Direct Box-Wireless Receiver with Balanced Stereo Direct Interface Outputs

Whirlwind pcDI Direct Box with RCA and 1/8in Inputs

Radial J48 Active 48V Phantom Powered Direct Box w/Digital Switching Supply

JENSEN JT-DB-E Direct Box Transformer

Whirlwind PCDIHW Direct Box Dual with RCA 1/4 Inch Inputs 1/8 Inch Hardwired Input Tail 30 Inch

RDL TX-LC2 Unbalanced to Balanced Line Combiner

Rolls HR187 Stereo Professional Bluetooth Direct Box

On Stage Stands DB100 Consumer to Pro DI - Laptop DI Box - 3.5 mm Plug to Mic-Level XLR Output

ARX AV-DI Audibox AV DI Stereo AV Active DI Box Stereo Converter

Radial BigShot ABY True Bypass Switcher

Radial Engineering HDI High-Definition Studio-Grade Direct Box with Transformer Saturation - Line Output

Rolls DB425 4 Channel Audio Direct Interface with Balanced XLR Outputs - 35kHz-20kHz

Palmer Audio PAN02 DI Box active

Radial X-Amp Active Re-Amplifier

Palmer Audio PAL-PBRIDGE4APLUS 19-Inch 4 Channel Active DI Box/Isolation Box - 9V DC Power Supply Included

DSan LSP-3 Multi-Input Passive Direct Box to Dual XLR Outputs for Computers - 1/8-Inch and 1/4-Inch Stereo TRS / RCA

Switchcraft 314DI Audio Stix Instrument Passive Direct Box

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