Direct Boxes

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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 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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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: $248.00
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: $198.00
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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ART AVDirect Multi-Input Audio/Video Direct Box - 1/4 Inch TRS / 1/8 Inch TRS and Stereo RCA Line Level
ART
Item# ART-AVDIRECT
With a comprehensive range of inputs, the ART AV Direct lets you connect virtually any analog audio source to a mixer or PA system without added noise or signal loss. There are 1/4" TRS, 1/8" TRS, and stereo RCA inputs for line level sources, and both 1/4" TRS and pressure clip connectors for speaker level sources. To reduce buzzes and hums, the front panel features a ground lift and high-frequency filter, and the balanced XLR output is isolated by a transformer. The passive...
Our Price: $85.99
Availability: Usually Ships in 5-14 Days
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Whirlwind PodDI Single Output Summing Direct Box
Whirlwind
Item# WW-PODDI
The podDI is a single output summing direct box. Use it to connect CD and MP3 players, computer sound card outputs, DJ mixers, etc. to professional equipment with balanced inputs such as a mixing console. Accepts stereo inputs and sums them into a single mono output. A variable attenuator on each input allows level matching between left and right inputs. This makes the podDI a passive mixer in split track audio applications, balancing the voice track and the music track levels in the summed mono...
Our Price: $136.00
Availability: In Stock
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Radial PRO-ISO Balanced +4dB to -10dB Unbalanced Passive Converter - Voice Range
Radial Engineering
Item# RAD-PRO-ISO
The ProISO is a stereo interface designed to take a high output +4dB line level signal from a mixing console and convert it so that it may be connected to low level unbalanced devices. In effort to adapt to all of the variables, the output may be adjusted with a recessed `set & forget' level control. This makes it easy to interface professional audio gear with devices such as computer sound cards, iPods or -10dB recorders. To reduce noise problems, the ProISO is equipped with an audio isolation...
Our Price: $199.99
Availability: Usually Ships in 5-14 Days
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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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Sescom Studio-Quality High Fidelity Passive DI Box
Sescom
Item# SES-DIPRO
Musicians and Sound Engineers once swore by those old bright blue DI boxes from Sescom. So by customer demand, Sescom brings back its famous DI Box enlisting our vast knowledge of transformers developed through countless prototypes actually tested in the real world. This is the simplest and best sound-by-design direct box for connecting a high-impedance, line level, unbalanced output signal to a low-impedance microphone level balanced input via XLR. Due to it's combo jack input and 3-way attenuation,...
Our Price: $153.95
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 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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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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Pro Co AV1B Audio Visual Passive Direct Box
Pro Co Sound, Inc.
Item# PRCO-AV1B
The Pro Co TradeTools AV1B Audio-Visual Interface allows the line-level outputs of audio and video playback devices, etc., to be connected to microphone inputs of house or portable P.A. systems for programs in school auditoriums, lecture halls, civic meetings and corporate board rooms. The AV1B provides audio interfacing and isolation with wide response and low distortion. Three different types of input connectors-1/4" (6.3mm) T/R/S phone, 2 RCA-type phono, and 3.5mm T/R/S mini jacks - simplify...
Our Price: $166.10
Availability: Usually Ships in 5-14 Days
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Pro Co AV1A A/V Interface Box with Line-Level Outputs for Playback Devices
Pro Co Sound, Inc.
Item# PRCO-AV1A
The ProCo TradeTools AV1A Audio-Visual Interface allows the line-level outputs of audio and video playback devices, etc., to be connected to microphone inputs of house or portable P.A. systems for programs in school auditoriums, lecture halls, civic meetings and corporate board rooms. The AV1A provides audio interfacing and isolation with wide response and low distortion. All inputs are parallel and resistively mixed to monaural. 1/4" 3-conductor phone jack, accepts signals from balanced...
Our Price: $145.92
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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: $54.95
Availability: Usually Ships in 5-14 Days
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Radial SB-5 Compact Stereo DI For Computers W/ Attached Cable Stereo or Mono Out
Radial Engineering
Item# RAD-SB-5
The Radial Stage Bug SB-5 is a compact stereo direct box designed to accommodate laptop computers, tablets and other consumer audio products when amplifying the signal through a PA system. The passive design begins with an integrated input cable that connects from the headphone out via a flexible 1.5m (5') cable that is terminated with a standard 3.5mm (1/8") stereo connector. The cable is secured via a clamping strain relief and is wrapped using the sidewinder cleat for easy storage. This of course...
Our Price: $119.99
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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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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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ARX IC-1 Audibox Iso Combiner Transformer Two Sources Into One XLR
ARX America
Item# ARX-IC-1
The ISO-Combiner is a new transformer isolated combiner for the Audibox range of Pro Audio tools and problem solvers. It is ideal for use in applications where two sources have to be combined into one signal, silently and easily. A pair of transformer balanced female XLR inputs combine to deliver a single transformer isolated male XLR output in this essential audio package. Available in Single Channel or Double Header format. Needs no power. Features: Specifications:
Our Price: $198.00
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ARX PDI-1 Audibox Pro DI Active Direct Box with High-Z & Speaker Level Inputs
ARX America
Item# ARX-PDI-1
A flexible, compact Active Direct box, with normal High Impedance input as well as a separate speaker level input for connection to an aux speaker output on the back of instrument amplifiers. Heavy duty all-steel chassis finished in attractive matt textured powdercoat, with hardwearing epoxy screen printing and slip resistant rubber pads. Features include -20 dB Pad and Audio Ground Lift switches, plus Phantom or 12V DC power options. Security features include Kensington-type computer lock...
Our Price: $198.00
Availability: Usually Ships in 5-14 Days
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ARX PDI-2 Audibox Pro DI Duo Stereo Active Direct Box with High-Z & Speaker In
ARX America
Item# ARX-PDI-2
The ARX PDI-2 is a flexible, compact Active Direct box, with normal High Impedance input as well as a separate speaker level input for connection to an aux speaker output on the back of instrument amplifiers. Heavy duty all-steel chassis finished in attractive matt textured polyurethane, with hardwearing epoxy screen printing and slip resistant rubber pad. Features: -20 dB Pad and Audio Ground Lift switches Phantom or 12V DC power options Kensington®-type computer lock...
Our Price: $263.12
Availability: Usually Ships in 5-14 Days
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Radial Tonebone Bassbone V2 Bass Preamp and DI Box
Radial Engineering
Item# RAD-BASSBONEV2
Like the original, the second generation Bassbone V2 features the same award-winning audio circuit that has made the Bassbone a top choice for many of the world's most prominent bass players including Marcus Miller, John Patitucci, Rhonda Smith and Victor Wooten. Simply stated, the Bassbone V2 is a bass command center. Connect any two basses and seamlessly toggle between them using a footswitch. Each channel has a separate level control to balance the two instruments and is augmented with a unique...
Our Price: $399.99
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
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Radial BigShot I/O True Bypass Instrument Selector
Radial Engineering
Item# RAD-BSHOTIO
The Radial BigShot i/o is an easy to use instrument selector switch that lets you quickly transition between any two instruments and drive the signal to your amp. Because the i/o is 100% true-bypass, it addresses the needs of the most demanding purist. To further enhance connectivity, input-B is equipped with a level control called DIM that lets you reduce the signal from the louder of your two instruments so that both instruments are matched to the same volume level when they reach the amplifier....
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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Radial R800 1100 Pro DI Full Range Passive Direct Box

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

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

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

Radial Pro48 Active Direct Box - 48V Phantom Powered

ART AVDirect Multi-Input Audio/Video Direct Box - 1/4 Inch TRS / 1/8 Inch TRS and Stereo RCA Line Level

Whirlwind PodDI Single Output Summing Direct Box

Radial PRO-ISO Balanced +4dB to -10dB Unbalanced Passive Converter - Voice Range

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

Sescom Studio-Quality High Fidelity Passive DI Box

Radial JPC Stereo PC-AV Direct Box

Radial JDI Passive Direct Box with Jensen Transformer

JENSEN JT-DB-E Direct Box Transformer

Pro Co AV1B Audio Visual Passive Direct Box

Pro Co AV1A A/V Interface Box with Line-Level Outputs for Playback Devices

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

Radial SB-5 Compact Stereo DI For Computers W/ Attached Cable Stereo or Mono Out

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

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

ARX IC-1 Audibox Iso Combiner Transformer Two Sources Into One XLR

ARX PDI-1 Audibox Pro DI Active Direct Box with High-Z & Speaker Level Inputs

ARX PDI-2 Audibox Pro DI Duo Stereo Active Direct Box with High-Z & Speaker In

Radial Tonebone Bassbone V2 Bass Preamp and DI Box

Radial BigShot ABY True Bypass Switcher

Radial BigShot I/O True Bypass Instrument Selector

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