Hazelrigg Industries 4DI 4DI - A DI Solution to Die For! Hazelrigg Industries has expanded its acclaimed Solution Series with the new 4DI, a powerhouse addition to a lineup that includes the VLC, VNE, VEC, and VDI. This innovative unit combines four channels of Doug Fearn’s renowned VT-I/F Direct Injection Box circuits, all packed into a sleek 2-space rackmount design. It's an ideal choice for a wide range of applications, from Houses of Worship and live FOH (Front of House) setups to recording studios and beyond. Unveiling the Classic All-Tube DI Circuitry The 4DI is a modernized take on the legendary D.W. Fearn VT-I/F, now featuring four channels of the classic all-triode vacuum tube direct box design. While the original VT-I/F offered two channels, this new iteration expands the utility with four independent channels, all housed in a compact 2-space rackmount unit. Whether on stage or in the studio, the 4DI delivers rich, dynamic sound quality for a variety of instruments. Features Designed for Versatility The 4DI is packed with features that make it highly versatile and easy to use: Front Panel Controls: The 4DI’s front panel sports four locking ¼” instrument inputs, each with its own ground lift switch and signal indicator LED, ensuring easy access and monitoring. Rear Panel Connectivity: On the rear, there are four sets of ¼” input and passthrough jacks (wired in parallel to the front panel connectors), alongside four microphone level outputs on XLR connectors. Power Flexibility: The rear panel also houses an IEC mains socket, power switch, and a 115V-220V mains selector for easy power adjustments. Stunning Sound Quality for Studio and Stage Sharing the same high-headroom, all-triode circuit design as the VT-I/F, the 4DI guarantees exceptional audio fidelity and responsiveness. It’s particularly well-suited for a range of applications, including: Electric Bass and Guitar: Experience impressive clarity and dynamic response with electric instruments. Synthesizers: Add fullness and vintage warmth to both analog and digital synths. Acoustic Instruments: Achieve a new level of depth and realism, particularly with piezo-equipped instruments. Built for Professional Reliability and Durability Crafted with professional-grade materials, the 4DI boasts a rugged steel chassis that fits snugly into any standard 19-inch rack. Each component is meticulously crafted and assembled by hand in the USA, ensuring long-lasting durability and performance. Key Specifications All-Tube DI Circuit: Originally designed by D.W. Fearn for unparalleled audio quality. Four Microphone Level Outputs: Available on XLR connectors for seamless integration with professional audio systems. Locking Ground Lift Switches: Provides isolation and eliminates ground loop issues on each channel. Handcrafted Construction: Proudly made in the USA, guaranteeing reliability and precision. Warranty: Backed by a 7-year warranty on parts (with a 90-day warranty for vacuum tubes). Find Your 4DI Today Key Features Recap: All-tube DI Circuit from D.W. Fearn 2-space rackmount steel enclosure 4 microphone-level XLR outputs Front panel instrument inputs with locking ground lift switches ¼” passthrough jacks for flexible routing Backed by a 7-year warranty

Hazelrigg Industries DLC DLC Vacuum Tube Inductor Equalizer: Classic Tube Warmth with Precision EQ Control The DLC Vacuum Tube Inductor Equalizer from Hazelrigg Industries brings a classic all-tube EQ circuit to your audio setup. Based on the passive equalizer circuit from the VLC and originally inspired by the D.W. Fearn VT-5, the DLC offers refined tonal shaping with vintage warmth. Its hybrid design combines a vacuum tube input stage and a solid-state output amplifier, making it versatile for both recording studios and live sound environments. Classic Equalization with a Modern Twist The DLC Equalizer features hand-wound inductors and high-quality filter capacitors, just like the original VLC. Its signal path uses the D.W. Fearn VT-2 input circuit, while the output employs a low THD, high-gain solid-state amplifier. This combination provides a warm, rich tone with the precision and stability of modern components. Key Features and Controls The DLC is designed for detailed EQ shaping and effortless control, with features that make it suitable for any sound source: Vacuum Tube Input Stage (6072a): Brings warmth and character, capturing the nuances of every signal. Hand-Wound Inductor: Delivers smooth, musical equalization curves, perfect for crafting vintage-inspired tones. Transformers in Input and Output: Ensures signal integrity and adds harmonic richness to the audio path. High and Low Boost Controls: Shape your sound with powerful high and low-frequency boosts for added presence and depth. High and Low Cut Controls: Control frequency cuts to reduce unwanted noise and sculpt the audio spectrum. Frequency Select Switches: Adjust the center frequency of each EQ band for precision tuning. Bypass Switch: Bypass the equalizer without interrupting the signal path, perfect for quick A/B comparisons. User Tips for Creating Complex EQ Curves The DLC offers a unique ability to boost and cut frequencies simultaneously, allowing for the creation of complex EQ curves. To experiment with this feature, start by turning up all the EQ controls except the bass boost. Then, select your desired frequency settings and gradually bring up the bass boost to achieve a balanced and nuanced sound. High-Quality Components for Professional Performance Built with hand-wound inductors and premium filter capacitors, the DLC ensures accuracy and musicality. With transformers on both the input and output, it maintains signal clarity while enhancing harmonic content, resulting in a warm, analog tone that’s perfect for any professional setup. Specifications Recap: All-Tube EQ Circuitry: Inspired by the legendary D.W. Fearn designs. Solid-State Output Amplifier: Provides high gain with minimal distortion, perfect for modern audio environments. Front Panel Controls: Easily accessible knobs for quick adjustments to high and low frequencies. 7-Year Warranty: Built to last, with a 7-year warranty on parts and 90 days on vacuum tubes. Why Choose the DLC Vacuum Tube Inductor Equalizer? For engineers and musicians looking to add vintage warmth with precise control, the DLC Vacuum Tube Inductor Equalizer is an essential tool. Its hybrid design delivers the best of both worlds—classic tube warmth with the precision and reliability of solid-state technology. Ideal for vocals, instruments, and full mixes, the DLC brings a rich, full-bodied sound to any audio production.

Hazelrigg Industries DNE DNE Pulse Width Modulation Compressor: Fast, Flexible Compression for Any Audio The DNE Pulse Width Modulation (PWM) Compressor from Hazelrigg Industries delivers top-tier compression circuitry inspired by the VNE and the legendary D.W. Fearn VT-7. Optimized for both ease of use and powerful performance, the DNE offers an intuitive interface and robust controls, making it perfect for both studio and live sound applications. Advanced Compression for Precise Audio Control The DNE PWM Compressor is engineered to provide transparent and responsive compression, with attack and release times that are finely tuned to simplify operation. Its High Pass Filter (HPF) minimizes sensitivity to low frequencies, making it ideal for sources like bass and kick drums, where you want to retain the punch without over-compressing the low-end. Key Features and Controls The DNE packs a range of professional-grade features designed for versatile use across various audio applications: PWM Circuit: Based on the acclaimed VT-7 and VNE, the DNE delivers ultra-fast attack and release times with minimal distortion. High Pass Filter Switch: Reduces compressor response to low frequencies, ideal for bass-heavy sources. Attack and Release Selector: Choose between fast and slow settings for precise control over compression dynamics. Threshold and Makeup Gain Controls: Adjust the compression threshold and compensate for gain reduction with ease. Link Switch for Stereo Operation: Link multiple units for synchronized stereo compression, provided your 500 series rack has a link option. LED Gain Reduction Meter: Visualize compression levels with a straightforward LED meter. Output Indicator LED: Easily monitor output levels and ensure consistent audio levels. Transformers in Input and Output Stages: Ensure clean signal integrity and add warmth, especially when driving the compressor harder. Simplified Interface for Fast, Effective Compression The DNE’s user interface is designed for quick adjustments without sacrificing control. Its streamlined design allows you to dial in settings quickly, making it perfect for live environments or fast-paced studio sessions. The attack and release time switches offer fast or slow settings, allowing you to respond to changing audio dynamics on the fly. User Tips for Optimal Performance Maximizing the potential of the DNE PWM Compressor is simple with these helpful tips: Using the HPF for Bass Instruments: Engage the High Pass Filter to prevent over-compression on bass-heavy material. This ensures that kick drums and bass guitars retain their impact without muddying the overall mix. Fast Release Times: For instruments like bass where quick recovery is key, the PWM circuitry can handle rapid release times. However, overly fast settings may introduce artifacts on some sources, so adjust with care. Linking Units for Stereo: When using two DNE units in stereo, attack and release times will automatically average between them. The threshold settings don’t need to match exactly, but be aware that each unit’s side chain references only the audio passing through it. Built for Durability and Performance With transformers in both input and output stages, the DNE maintains signal integrity while adding a subtle warmth to the audio. Its rugged construction ensures it’s built to last, and Hazelrigg Industries stands by the quality with a 7-year warranty, giving you peace of mind for years to come. Specifications Recap: Linkable for Stereo Operation: Compatible with 500 series racks with link functionality. Intuitive Controls: Quick attack and release settings, with straightforward threshold and gain controls. Bypass Switch: Easily bypass the compressor without altering your signal chain. Makeup Gain Control: Perfect for compensating post-compression levels. LED Metering: Provides real-time monitoring of gain reduction and output levels. Why Choose the DNE PWM Compressor? The DNE PWM Compressor is a perfect choice for engineers and producers who need quick, reliable compression without sacrificing control. Whether it’s for vocals, drums, or full mixes, the DNE delivers professional compression with simplicity and style.

Hazelrigg Industries DVA DVA Vacuum Tube Microphone Preamplifier/DI: A Blend of Vintage Warmth and Modern Precision The DVA Vacuum Tube Microphone Preamplifier/DI by Hazelrigg Industries is a premium hybrid preamp that combines the best elements of the classic Hazelrigg VLC and the D.W. Fearn VT-2. Designed with a single 6072a vacuum tube, the DVA captures the iconic sound of tube-based preamps while integrating a high-output, low-distortion solid-state signal path, making it a versatile addition to any 500 series rack. A Perfect Fusion of Analog Warmth and Solid-State Clarity The DVA’s design incorporates the VLC/VT-2 input stage, utilizing transformers in both the input and output stages for a rich, full-bodied tone. Unlike traditional vacuum tube circuits, the DVA achieves make-up gain through a solid-state output stage, which allows for low total harmonic distortion (THD) and high output capabilities, an essential feature for the compact 500 series format. Key Features and Specifications The DVA is packed with features that make it a powerful tool for both recording and live performance: Vacuum Tube Microphone Preamp (6072a): Ensures warmth and detail, capturing the character and nuances of the source. Vacuum Tube DI (6072a): Ideal for instruments, this DI offers a lush, natural tone that enhances any input. Transformers in Input and Output: Designed for rich harmonic content and optimal impedance matching. Total Gain of 60dB: Offers ample headroom for a variety of microphones and instruments, ensuring versatility across applications. Polarity Reversal Switch: Allows for easy phase alignment during recording sessions. -20dB Pad Switch: Enables attenuation of hot signals, perfect for high-output microphones and instruments. +48V Phantom Power with LED Indicator: Supports condenser microphones and active DIs with a convenient on/off LED indicator. High Pass Filter Switch: Filters out unwanted low frequencies, reducing rumble and handling noise. User Tips for Optimal Performance The DVA’s high output and classic tube character make it a flexible choice, but there are a few user tips to keep in mind: Handling High-Output Condensers: Many condenser mics have high output levels, which may overload the DVA’s input transformer. If you experience clipping, engage the mic’s pad if available. Exploring Tube Saturation: For a more saturated tone, engage the -20dB pad and send an attenuated signal to the DVA. You can then increase the gain to adjust the tone and saturation level to taste. Built to Last with Professional-Grade Components The DVA boasts the reliability and craftsmanship Hazelrigg Industries is known for. It features premium transformers, a rugged front panel microphone/instrument input, and an output level indicator LED. This preamp/DI is hand-built to ensure each unit meets stringent quality standards. Specifications Recap: Designed by D.W. Fearn: Built on decades of expertise in audio engineering. All-Steel 500 Series Module: Durable and compact, perfect for mobile rigs and studio racks. 7-Year Warranty: Peace of mind with long-term coverage (90 days for vacuum tubes). Elevate Your Sound with the DVA Preamp/DI Whether you’re capturing vocals, acoustic instruments, or amplifying electric guitars, the DVA delivers a warm, detailed, and powerful sound that is sure to enhance any recording or live performance. With classic tube warmth and modern solid-state clarity, the DVA Vacuum Tube Microphone Preamplifier/DI is an indispensable addition to any audio setup.

Hazelrigg Industries VDI Tube DI (Direct Injection) Interface A reimagining of the legendary D.W. Fearn VT-1/F, the VDI is an all-triode Vacuum Tube Direct Box in a single channel configuration. Unlike the original VT-I/F dual channel design, the VDI is a single channel offering housed in a robust, low profile steel chassis, ready to slip into a backpack or gig bag. Designed for both stage and studio work, the VDI is offered as part of the Hazelrigg Industries Solutions Series by D.W. Fearn and will deliver incredible results with amplified acoustic instruments, electric bass and guitar, synths or more. The operation is simple as can be. The front panel includes a 1/4” Instrument Input jack as well as a 1/4” Thru connector to pass the signal on to a guitar or bass amplifier if desired. The mic level output signal is available on an XLR Connector, ready to be patched to a premium Microphone Preamp such as the D.W. Fearn VT-1, VT-2, VT-24 or Hazelrigg Industries VLC. Finally a Ground Lift option is provided to address Ground Loop issues should they arise. The more utilitarian rear panel features an IEC Mains Socket, Power Switch and 115V-220V Mains Selector. Sharing the same high-headroom circuit design as the venerable VT-I/F, the VDI will provide stunningly dynamic results on electric bass and guitar, add power and girth to vintage (or modern!) synths and bring a depth and realism to piezo equipped acoustic instruments outfitted that simply must be heard. Specifications Direct Injection Circuit Designed by D.W. Fearn Front Panel Instrument Input on 1/4” Jack Front Panel Pass-through Output on 1/4” Jack Front Panel Microphone Level Output (150 ohm source impedance at a nominal -30dBV) on XLR Connector Ground Loop Switch All Steel Chassis 5 Year Warranty (90 days for vacuum tubes) Hand Crafted in the USA

Hazelrigg Industries VEC (Everything Chain) The Everything Chain: The Ultimate Audio Solution for Every Sound Vocals? Check. Guitars? No problem. Bass? Absolutely. Keys? Perfect. Drums? Impressive. Strings? Silky smooth. Brass? Booming. Need it all? The Everything Chain from Hazelrigg Industries has you covered. Hazelrigg Industries introduces the Everything Chain, a comprehensive audio solution designed to handle any sound source with professional-grade quality. Ideal for tracking, mixing, and live sound, this all-in-one bundle brings together some of the finest audio components available, making it the ultimate choice for audio engineers and musicians alike. What’s Included in the Everything Chain Bundle? The Everything Chain offers a complete set of tools for high-quality audio processing, all packaged in a convenient and stylish bundle. Here’s what you get: 1. VLC All-Tube Mic Preamp/Line Processor/EQ/DI The VLC is a versatile, all-tube preamp that can handle microphones, line signals, and instruments with ease. Its vacuum tube circuitry adds warmth and character to any signal, making it a great choice for vocals, guitars, bass, and more. With built-in EQ and DI capabilities, the VLC is a true powerhouse, capable of sculpting sound right at the source. 2. VNE All-Tube PWM Compressor The VNE is an all-tube, single-channel compressor that utilizes Pulse Width Modulation (PWM) for dynamic control with minimal distortion. It’s perfect for everything from subtle leveling to aggressive compression, maintaining transparency while preserving the integrity of your audio. The VNE is ideal for vocals, drums, and any other source where you need smooth and consistent dynamics. 3. VPH Vented Rack Panel To top off the bundle, Hazelrigg Industries includes the VPH vented rack panel. This stylish accessory not only keeps your gear cool by promoting airflow within the rack but also adds a polished, professional look to your setup. Why Choose the Everything Chain? The Everything Chain isn’t just a bundle of high-quality gear; it’s a complete solution that brings out the best in any sound source. Here are a few reasons why it stands out: All-Tube Circuitry: Both the VLC and VNE feature classic all-tube designs, ensuring warmth, depth, and character in every note. Versatility: With a preamp, compressor, EQ, and DI functionality, this bundle covers the entire audio chain from start to finish. High-Quality Components: Built to last with premium materials and expert craftsmanship, the Everything Chain is ready to perform night after night. Stylish Design: The matching vented rack panel keeps things cool while adding a sleek aesthetic to your setup. Applications for the Everything Chain The Everything Chain is designed to enhance any audio project, whether you're in the studio, on stage, or mixing for live sound. Its components work seamlessly together, providing a smooth and cohesive audio experience for: Vocals: Add warmth and clarity with the VLC and tighten dynamics with the VNE for studio-quality vocal tracks. Instruments: Whether it’s guitar, bass, or keys, the Everything Chain brings out the natural tone of your instruments. Drums: Get that punch and depth in your drums with precise compression and EQ settings. Orchestral Elements: From strings to brass, the tube circuitry brings an authentic, vintage warmth to any orchestral sound. Key Benefits Recap: Complete, all-tube audio chain Versatile preamp, compressor, EQ, and DI functionality Sleek, durable design with vented rack panel Perfect for tracking, mixing, and live sound applications Discover Hazelrigg Industries TodayExperience the best in all-tube audio solutions with the Everything Chain. Ideal for professional studios and live environments, this bundle delivers unbeatable quality and performance.

Hazelrigg Industries VLC MKII The foundation of the VLC is the legendary Preamp and Power Supply design utilized in the VT series of Tube Microphone Preamplifiers from D.W. Fearn. Designed for sonic transparency and delivering incredible headroom, the VLC will produce stunning results with dynamic, condenser and ribbon microphones and will change the way that you approach your mic locker during a session. A rotary switch on the front panel will also select between Microphone, Instrument Input (DI) or the Balanced Line Level Input located on the back panel. The all tube DI path is ideal for acoustic instruments with pickups, electric bass, modular synths or any instrument that would enjoy a bit of D. W. Fearn magic, while the Line Level Input allows the VLC to be wired as an insert on your mixer or DAW for fast and easy “re-preamping” of tracks during production or mix down. This feature is the secret weapon of many VLC users and allows them to breathe new life into tracks received from remote clients or simply add a bit of extra mojo to a mix as needed. Moving beyond the input and gain sections, the VLC delivers powerful tone contouring in the form of a passive LC EQ.  The bottom is handled by variable Low Cut and Low Boost controls while the top end is managed similarly with High Boost and High Cut dials. Each of these four controls features a two way High/Low Frequency Select switch for even more precise tone shaping. Beautifully musical - even at extreme settings - these controls encourage you to use your ears to dial in your tone while an EQ In/Out toggle is nearby to make it easy to check your work. Hazelrigg Industries VLC: The audio Swiss Army Knife that you should not be without. Specifications Microphone/Line/DI Preamplifier; LC Equalizer Amplifier and Power Supply Designed by D.W. Fearn Transformer Coupled Input and Output All-Tube Signal Path Passive EQ Low Cut - Low Boost/High Cut – High Boost 2-way Frequency Selector for Each Custom-wound Inductor Dedicated Balanced Line Input on Rear Panel (Selectable from the Front Panel) Rear Panel Microphone Input Front Panel Microphone/Instrument Input (Redundant Microphone Input on Rear Panel) Locking +48V Safety Switch -20 dB Switch Polarity Reversal Switch EQ Bypass Switch 5 Year Warranty (90 days for vacuum tubes) Hand Crafted in the USA

Hazelrigg Industries VNE Vacuum Tube Compression Amplifier Joining the Hazelrigg Industries Solutions Series, the VNE is a handcrafted, single channel compressor designed to elegantly control dynamics without negatively affecting the tonal qualities of the source material. Ideal for tracking and mixing, the VNE features an all Class-A vacuum tube audio path, like all D.W. Fearn and Hazelrigg Industries products. As originally introduced in the D.W. Fearn VT-7 Stereo Tube Compression Amplifier, the gain reduction circuit utilizes readily available tubes to deliver classic tube compressor performance, while employing an innovative Pulse Width Modulation control circuit to drive the compression. The combination of this precision PWM control methodology and D.W. Fearn’s high fidelity compression amplifier design result in an audio tool that delivers comprehensive dynamics control, without imparting unwanted tonal artifacts on the source material. In use, the VNE can be applied as subtly or aggressively as desired while retaining a beautifully transparent sonic signature. As with all D.W. Fearn and Hazelrigg Industries offerings, each component has been hand selected for superior audio performance and rock-solid reliability and – most importantly - critical decisions in the development process were made during rigorous listening tests to ensure that the resulting device delivers superlative audio performance on any source, and on any session.  In addition, the front panel of the VNE has been designed for fast, easy and intuitive operation and includes controls for Threshold, Attack, Release and Gain as well as a three-way rotary switch allowing the user to bypass compression or to insert a High-Pass Filter (HPF) in the side-chain to reduce the gain-reduction sensitivity to low frequencies. This is a gentle roll-off, nominally at 100Hz, to avoid heavy low-frequency transients from overly modulating the audio level. Specifications (@ no gain reduction, unity gain) Frequency Response: 20Hz – 20kHz +/- 0.5dB -3dB at 5Hz and 65kHz THD: less than 0.07% Signal to Noise Radio: better than 80dB Pulse Width Modulation Compression as employed in the D.W. Fearn VT-7 Transformer Coupled Input and Output All-Tube Signal Path Front Panel Output Level Indicator Front Panel Gain Reduction Meter Rear Panel Balanced Line Input (XLR) Rear Panel Balanced Line Output (XLR) 7 Year Warranty (90 days for vacuum tubes) Hand Crafted in the USA