Hazelrigg Industries VDI Vacuum Vacuum Tube Single-channel Direct Injection Box

A Tube DI That Feels Like Your Trusty Amp

The quest for the ultimate direct box

Since the 1960s, recording engineers have sought sonically superior methods for direct injection of electric bass, guitars, and other instruments that normally plug into an amp. The tradeoffs usually involved settling for a relatively dry and lifeless sound in the interest of eliminating room leakage — with the exception of a few innovative proprietary designs. (Hello, Motown!) The Hazelrigg Industries VDI Vacuum Tube DI is one such inspired design. Through its all-tube circuitry and Jensen transformer-balanced output, electric basses sound vibrant, fat, and punchy. Electric guitars — which typically do not fare well when taken direct — sound (and just as importantly, respond) like they’re plugged into a good tube guitar amp.

Seamlessly interfaces with any setup

Hazelrigg Industries designed the VDI to interface seamlessly with modern pro setups, both in the studio and on the road. Whether you’re laying down tracks or mixing front-of-house, the single-channel VDI delivers a user-friendly “hot” mic-level output of -30dBm (nominal) that plays nice with professional 150 ohm mic inputs. As you would expect, the VDI is equipped with a Thru jack wired in parallel to the unbalanced input for connection to, for instance, a bass or guitar amp. A ground switch and the main transformer-balanced XLR output round out the connections panel; on the other end are a standard IEC mains socket, the power switch, and a 115V/230V mains selector. Both end panels are recessed, offering a degree of protection for settings and connectors.

Built for years of dependable service

Hazelrigg Industries uses only the finest components throughout the VDI, with both the filament and the plate power supplies being fully regulated for tour-tough dependability. The casing is machined from a solid 1/4-inch-thick aluminum plate and fashioned into a sleek design that slips into your gig bag for immediate deployment. And as with all Hazelrigg Industries gear, the VDI is scrupulously bench tested for optimum performance and reliability before leaving the factory. For additional peace of mind, it includes Hazelrigg Industries’ limited 7-year warranty (90 days for vacuum tubes). With its alluringly amp-like sound and rock-solid build quality, musicians and engineers at Sweetwater are quite taken with the VDI. You will be, too!

Hazelrigg Industries: sonic authority, handcrafted in the USA

Back in the Golden Age of Analog, pro audio equipment was meticulously assembled by hand using military-grade components — factors to which the timelessly superior sound and performance of coveted vintage gear are often attributed. Handcrafting their original designs in the USA with premium parts and an all-tube signal path, this is the way Hazelrigg Industries rolls. The company also benefits from the collaborative expertise of noted electronics guru D.W. Fearn, whose custom amplifiers and power supplies are at the heart of their acclaimed products. When uncompromising audio performance is a must, look to Hazelrigg Industries for solutions. Sweetwater is proud to bring you this exciting lineup of world-class professional equipment.

Hazelrigg Industries VDI Vacuum Vacuum Tube Single-channel Direct Injection Box Features:

• Sleek design that slips into your gig bag
• Solid 1/4-inch thick aluminum plate casing for tour-tough durability
• Amplifier and power supply designed by D.W. Fearn
• 200mV nominal unbalanced 1/4-inch input jack
• Thru jack for connection to instrument amps, stomp boxes, etc.
• All-tube signal path
• Balanced XLR output with custom Jensen transformer
• 1 Mohm minimum input load impedance
• Frequency response: 10Hz–20kHz, +/- 0.2dB (-3dB @ 0.5Hz and 95kHz)
• THD + noise: <0.3%, 20Hz–20kHz
• -30dBm nominal “hot” mic-level output
• Built-in ground lift
• Dimensions: 6.25 x 2.25 x 9.5 inches (W x H x D)
• Internal power supply; rear-panel IEC mains socket
• Rear-panel mains selector (115V/230V)
• Limited 7-year warranty (90 days for vacuum tubes)
• Handcrafted in the USA

Tech Specs

• Type:Active Tube Direct Box
• Channels:1
• Ground Lift:Yes
• Inputs:1 x 1/4"
• Outputs:1 x XLR (main), 1 x 1/4" (thru)
• Power Source:Standard IEC AC cable
• Height:2.25"
• Depth:9.5"
• Width:6.25"
• Weight:6 lbs.
• Manufacturer Part Number:VDi

Solid State Logic Bus+ 2-channel Bus Compressor

2-channel Bus Compressor with Dynamic Equalizer and 4 Modes of Operation

$2,899.99

Or $121.00/month^§ with
24 mo. financing* i

 (1)

COMPARE

dbx DriveRack PA2 Complete Loudspeaker Management System

Loudspeaker Management and Optimizer with Feedback Suppression, Auto EQ, Compression, and Mobile Device Control

$509.00

Or $22.00/month^§ with
24 mo. financing* i

 (37)

COMPARE

Behringer ADA8200 8-channel Microphone Preamp

8-channel Microphone Preamplifier and 24-bit 44.1/48kHz AD/DA Converter with ADAT Optical Out

$219.00

Or $73.00/month for
3 mo. with Easy Pay i

 (51)

COMPARE

Behringer Ultragraph Pro FBQ1502HD 15-band Stereo Graphic EQ with FBQ Feedback Detection

15-band Equalizer with FBQ Feedback Detection

$109.00

Or $36.33/month for
3 mo. with Easy Pay i

 (27)

COMPARE

TC-Helicon Duplicator Vocal Effects Stompbox

Vocal Effects Pedal with Mic Preamp, Doubling, Reverb, and Pitch Correction

$139.00

Or $46.33/month for
3 mo. with Easy Pay i

 (41)

COMPARE

Solid State Logic Fusion Analog Master Processor

Master Processor with Vintage Drive, Violet EQ, HF Compressor, Stereo Image Enhancer, and SSL Transformer Circuits

$2,699.99

Or $113.00/month^§ with
24 mo. financing* i

 (25)

COMPARE

TC Electronic Clarity M Stereo Loudness Meter

Stereo Audio Meter with 7" High-resolution Display and USB Connection for Plug-in Metering

$329.00

Or $109.66/month for
3 mo. with Easy Pay i

 (12)

COMPARE

Avalon VT-737sp Tube Channel Strip

Tube Microphone / Instrument Preamplifier, Opto-compressor, and Sweep Equalizer

$3,595.00

Or $150.00/month^§ with
24 mo. financing* i

 (43)

COMPARE

Rupert Neve Designs Shelford Channel Microphone Preamp, Inductor EQ & Diode Bridge Compressor

Mono Channel Strip with Transformer-gain Mic Preamp, Inductor EQ, Diode-bridge Compressor, Sidechain and Stereo Link Sends/Returns, Double-voltage Power Supply, and VU Meter

$3,999.00

Or $167.00/month^§ with
24 mo. financing* i 

 (37)

COMPARE

dbx 266XS Dual Compressor/Gate

2-channel Compressor/Gate

$199.00

Or $9.00/month^§ with
24 mo. financing* i

 (23)

COMPARE

TC-Helicon Mic Mechanic 2 Vocal Effects Pedal

Vocal Effects Pedal with Reverb, Delay, Pitch Correction, Adaptive Tone, and 9V Operation Option

$149.00

Or $49.66/month for
3 mo. with Easy Pay i

 (55)

COMPARE

Warm Audio WA-2A Tube Optical Compressor

1-channel Tube Optical Compressor with All-discrete Signal Path, Custom Optical Photocell, and Cinemag Transformers

$949.00

Or $40.00/month^§ with
24 mo. financing* i

 Demo available for $854.10

 (37)

COMPARE