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Andy Roman Custom Tube Amp Fat Boy
"A single amplifier, a moldable architecture: from open vintage dynamics to the structured density of cutting-edge high-gain."
The Fat Boy is a high-engineered tube amplifier designed for the uncompromising musician. Thanks to an extremely flexible, proprietary control section, it allows you to sculpt the frequency spectrum, shifting from classic voicings to modern saturations with surgical precision.
💎 CLEAN CHANNEL
Engineered for monumental headroom and superior dynamic response.
• Controls: Volume, Bass, Treble.
• Triple Bright Switch: Bypassable (Off) or selectable across two distinct target frequencies:
- High Frequency: For a crystalline response and maximum harmonic transparency on transients.
- Mid-High Frequency: To enhance attack velocity and core presence in the mix.
🔥 DRIVE CHANNEL
A pure vacuum tube saturation laboratory featuring dedicated, bypassable circuit modules:
• Controls: Gain, Volume, Bass, Middle, Treble.
• Voicing & Gain Modes:
- Vintage Raw Mode: Classic, open saturation highly sensitive to pick dynamics.
- High-Punch Mode: Focused high-gain harmonic structure with strong mid-range articulation.
- Hi-Gain Focus: Modern, dense, leveled, and heavily compressed saturations.
- Fat & Super Fat: Alters the circuit's response for a massive, firm, and authoritative low-end body.
• Jose Style Compression:
Symmetrical/Asymmetrical dynamic clipping network based on component selection. It can be bypassed or set between "Germanium" (soft, warm, vintage grain) and "Silicon" (aggressive, fast, and tight compression).
• Boost Drive 6dB: Pure vacuum tube gain enhancement to increase sustain and projection during solo passages.
🎛️ MASTER & POWER SECTION
• Master Volume: Linear and absolute management of output power.
• Presence & Resonance: Final analog control over power section brightness and the depth of coupling with the cabinet.
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – FAT BOY
• Model: Fat Boy (Original Project by Andy Roman)
• Output Power: 100 Watt RMS
• Construction: 100% Handcrafted 3D Point-to-Point wired
• Operating Class: Class AB with Cold Bias (for maximum dynamic transient definition)
• Power Tubes: 4 x Selected EL34
• Preamp Tubes: 4 x Selected 12AX7 (ECC83)
• Power Supply Section: Solid-state stage featuring high-speed, fast-recovery diodes
• Sonic Character: Firm, authoritative low-end response, harmonic-rich mid-range, massive and visceral tone
• Speaker Outputs: Rear panel impedance selector (4 / 8 / 16 Ohm)
F.U.C.K. 100W – Pure High-Voltage Tone Amplifier by Andy Roman (2003)
If the Fat Boy represents the essential sonic matrix and the Tube 100 is the architecture's extension, the F.U.C.K. head (2003) stands as the ultimate expression of structured power and molecular signal control. A 100W RMS power section driven by a selected quartet of EL34 tubes, engineered for purists demanding absolute versatility and uncompromising sonic authority.
💎 COUPLING & CRAFTSMANSHIP EXCELLENCE
• Development Year: 2003, a definitive milestone for custom engineering at the Andy Roman laboratory.
• Elite Component Selection: High-magnetic-flux oversized custom transformers and meticulous 3D point-to-point wiring, sharing the same premium platform as the Fat Boy and Tube 100 models.
• EL34 Core Architecture: The thermal and dynamic potential of the octal tube pushed to its limits, characterized by roaring mid-range presence, razor-sharp focus on fundamentals, and explosive transient response.
🔊 TRIPLE INDEPENDENT CHANNEL ARCHITECTURE
Unlike industrial designs that compromise by sharing equalization stages, the F.U.C.K. head guarantees absolute circuit isolation and dedicated tone tailoring via completely independent 3-band EQ networks for every single channel:
1. CLEAN: Crystalline, linear, and deep. Featuring an independent Gain control to shift from high-headroom transparency to early dynamic harmonic saturation, backed by a Bright switch to enhance attack definitions on high-frequency transients.
2. CRUNCH & LEAD: Two high-gain stages with distinct circuit identities, shaped and optimized by three independent voicing modules:
- Fuel: Provides an extra energy injection at the input stage to enhance body and linear density.
- Bright: Defines and sharpens upper-register frequencies even under extreme gain loads.
- Drive: Controls local dynamics to fine-tune and sculpt the signal's symmetrical compression.
📊 OFFICIAL TECHNICAL SPECIFICATIONS
• Power Output: 100 Watt RMS
• Construction: 100% Handcrafted 3D Point-to-Point air-wired circuit
• Configuration: 3 Completely isolated circuit channels (Clean, Crunch, Lead)
• Controls: Independent 3-band EQ (Bass, Middle, Treble) + Gain + Volume for each individual channel
• Switching: Comprehensive high-speed electromechanical management of channels and voicing modes
• Reliability: Engineered for absolute performance consistency over decades of professional studio and live touring environments
"F.U.C.K. 100W: Beyond structural limits."
Conceived in 2003, the F.U.C.K. head represents a calculated engineering challenge: seamlessly integrating three distinct amplifier architectures within a single chassis, while fully preserving the uncompromised signal integrity of the lab's artisanal wiring methods.
Driven by the physical response of the EL34 power section and the fine-tuning capabilities of the Fuel, Bright, and Drive networks, this model has emerged as a landmark collector's piece for musicians seeking the massive, three-dimensional, and highly articulate tone that defines our heritage. Same engineering DNA as the Fat Boy, tripled operational flexibility.
Andy Roman "ThreeRyche" – Progressive Legacy Edition (One-Off)
"The ThreeRyche stands as an engineering celebration of executive precision and harmonic articulation native to avant-garde Progressive Metal. This unique, 100-Watt RMS one-off masterpiece was meticulously engineered to order for a professional musician demanding the intricate tonal architecture of Chris DeGarmo, backed by a transient speed and dynamic range entirely unattainable by commercial amplifiers of that era."
📐 BESPOKE ARCHITECTURE: THE EVOLUTION OF CUSTOM ANDY ROMAN DNA
To achieve this electroacoustic milestone, we extracted the blueprint from our laboratory's elite circuit matrix, deeply restructuring its core character:
• Voice Tweaking & Frequency Alignment: Through microscopic fine-tuning of the filtering values across individual gain stages, we isolated and focused the upper-midrange spectrum. This optimizes the circuit for the absolute intelligibility of tight polyphonic rhythms and the linear projection of leads rich in upper harmonics.
• Headroom and Dynamic Integrity: Despite requiring a dense, compressed, and strictly defined texture, the massive energy reserve of the 100-Watt RMS power section (switchable to 20 Watts RMS) ensures that the touch's micro-dynamics emerge uncompromised, preventing any intermodulation or signal blurring.
• Circuit Tailoring: Every single passive component was strictly selected, bench-tested, and matched to respond with mathematical accuracy to the specific kinematic needs of the client's playing style.
"The ThreeRyche is not a sterile historical replica, but a structural evolution: it captures the aesthetic essence of an era and projects it into modern analog dynamics."
📊 FROM THE STUDIO TO THE STAGE: PROFESSIONAL VALIDATION
The ThreeRyche head stands among the landmark custom designs of the Andy Roman workshop, chosen by industry professionals for its superior transient response:
• In the Recording Studio: The head is part of the official backline at Aton Studio (a reference facility reviewed on Rock.it), selected for their analog equipment roster to guarantee top-tier tracking and tracking fidelity during tracking sessions.
• On Stage (Live & Video): The projection and articulation of the ThreeRyche can be experienced within a professional audio-video production by watching the amplifier in action in the official video by the tribute band Anarchÿ-X.
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – "THREERYCHE" MODEL (ONE-OFF)
• System Typology: Progressive Legacy Edition (Unique Piece / One-Off)
• Tonal Profile: Optimized for high-articulation Progressive Metal (DeGarmo style)
• Selectable Power Output: 100 Watt RMS or 20 Watt RMS (Switchable plate-swing reduction)
• Core Architecture: Proprietary high-flexibility platform (Andy Roman Custom Evolution)
• Circuit Calibration: Calibrated Voice Tweaking targeted at specific sectors of the midrange spectrum
• Feedback & Dynamics: Maximum headroom reserve engineered for complex rhythmic patterns
• Power Supply & Output Stage: High-speed, fast-recovery diode power section for absolute transient stability
• Construction: 100% Handcrafted 3D Point-to-Point air-wired circuit
Threeryche: From Studio to Stage
The Threeryche head is one of Andy Roman's signature time-tested models, trusted by studio engineers and touring musicians alike for its exceptional dynamic response and pure tube definition.
In the Recording Studio: The head is a core piece of the official gear collection at Aton Studio (as featured on the Italian music platform Rock.it), selected for its uncompromising analog tone during professional tracking sessions.
On Stage & in Action: Watch the Threeryche deliver its massive tone in the official video by Anarchy-X. Witness the amp's raw power, tight crunch, and cutting presence through a top-tier professional mix.
https://youtu.be/UWMy5FUD9og?si=LRs8BWZxt_kb6ynU
TUBE 100 – Original Project and Custom Evolution by Andy Roman (2001)
"The Tube 100 is not merely an amplifier; it is pure acoustic engineering. Developed from the same conceptual matrix and utilizing the elite components of the Fat Boy system, it represents the first Andy Roman platform engineered specifically for the most demanding professional musicians, introducing a triple isolated channel architecture and the proprietary Dual Effects Loop system."
Since 2001, this model has redefined the standards of analog versatility through advanced, lossless external signal routing and three completely circuit-independent channels.
💎 FAT BOY DNA & CRAFTSMANSHIP
• Design Integrity: Handcrafted 3D point-to-point wired circuit optimized to guarantee absolute dynamic response and the elimination of parasitic capacitance.
• Premium Component Selection: Custom oversized high-flux transformers and vacuum tubes strictly matched and tested to laboratory standards.
• Structural Reliability: Mechanical engineering designed to withstand the physical demands of professional touring, ensuring immutable operational stability.
🔊 TRIPLE CHANNEL ARCHITECTURE
• CLEAN: Crystalline, linear, and deep, characterized by monumental headroom and harmonic transparency.
• CRUNCH: Progressive transition from early dynamic break-up to rich mid-range saturations, highly reactive to touch micro-dynamics.
• LEAD: Stable high-gain registers delivering a dense, fluid sustain, engineered for maximum note projection and articulation across the acoustic spectrum.
🎛️ EXCLUSIVE FEATURE: DUAL EFFECTS LOOP
• "Dual Effects Loop": Two completely independent and electrically isolated send/return sections.
• Zero-Latency Mechanical Switching: Management of distinct signal processing chains directly from the footswitch via high-speed relays, eliminating any degradation or attenuation of the analog tone.
📍 SPECIFICATIONS AT A GLANCE
• Power Output: 100W Vacuum Tube RMS
• Control Interface: Independent Gain and Volume potentiometers for each channel + dedicated 3-band EQ networks
• Switching System: Professional control unit included for instantaneous selection of channels and routing paths (Loop 1 / Loop 2)
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – TUBE 100
• Model: Tube 100 (Original Project by Andy Roman)
• Project Year: 2001
• Power Output: 100 Watt RMS
• Construction: 100% Handcrafted 3D Point-to-Point air-wired circuit
• Power Tubes: 4 x Selected EL34
• Preamp Tubes: 5 x Selected 12AX7 (ECC83)
• Power Supply Section: Solid-state architecture featuring high-speed, fast-recovery diodes for ultimate transient definition
• Channel Configuration: 3 Completely isolated circuit channels (Clean, Crunch, Lead)
• Effects Loop: High-voltage Dual Effects Loop (Double independent send/return)
• Speaker Outputs: Rear panel impedance selector (4 / 8 / 16 Ohm)
• Switching Management: High-speed relay-driven channel and loop selection via included professional footswitch
"Over twenty years of history: from the official 2003 presentation to the present day."
Point Zero: Baby Blues 30 (22W RMS Measured – The Origin of the Pro)
"These two original handwritten schematics from the year 2000 represent the core of the Andy Roman philosophy and the direct predecessor to the subsequent Baby Blues Pro series. These are 22 real Watts, strictly bench-tested, where the priority was not claimed power, but the coherence of the time constant and the physical dynamics of the sound."
🎸 Andy Roman Baby Blues 30W (22W RMS) – Original Project and Custom Tone Genesis (2000-2003)
"Three-dimensional point-to-point architecture featuring dual isolated channels and vacuum rectifier: shifting from high-headroom crystalline transparency to high-gain saturation driven directly by the F.U.C.K. circuit topology."
Conceived in the early 2000s, the Baby Blues 30W stands as the perfect synthesis between visceral analog distortion and rigorous audiophile purity. An uncompromising project where the geometric placement of every single component is explicitly dedicated to preserving tone integrity.
🔊 THE TWO FACES OF TONE
The amplifier is engineered around two completely circuit-independent channels:
• Clean Channel: A pure, lossless signal path backed by a dedicated 3-band EQ network. The implementation of Silver Mica and Tantalum capacitors guarantees razor-sharp articulation and transient response velocity at the absolute top of its class.
• Drive Channel: A direct evolution of the proprietary F.U.C.K. architecture, engineered to shift seamlessly from compressed, modern high-gain settings to warm, organic voicings highly reactive to pick micro-dynamics.
📐 "ZERO COMPROMISE" CRAFTSMANSHIP
The core of the Baby Blues 30W system lies in the advanced engineering of its power supply and output section:
• Power & Dynamics: Driven by a matched pair of selected EL34 tubes, the amplifier delivers its power with zero Negative Feedback (NFB), allowing the power stage to breathe freely for an open, three-dimensional, and highly dynamic response.
• Audiophile Power Supply: A power module meticulously built with premium Polypropylene and Paper-in-Oil (PIO) capacitors, capturing maximum natural texturing and tonal coherence.
• Dual Rectification: Provides the choice to switch between Vacuum Tube Rectification (via a 5R4 diode for a soft, progressive, and linear "sag") or Solid-State Rectification (for a fast, percussive, and modern attack velocity).
• Anodic Evolution — The Choke Input Filter: Where industrial standards compromise with cheap capacitive Pi-network designs, the Baby Blues implements an esoteric solution: a pure choke input filter. By placing the inductor as the absolute first element immediately following rectification, the circuit forces the power supply to operate on current rather than peak voltage.
- Technical Advantages: This module eliminates harsh current spikes hitting the rectifier tube, significantly extending its operating life, while neutralizing residual ripple and switching noise at the root.
- Physical Response: Anodic voltage remains rock-solid and never collapses under violent transients. Dynamic response becomes instantaneous, delivering an authoritative power reserve and a deep "acoustic blackness" from which the note leaps forward with zero latency.
• Noise & Tone Management: Power tube filaments are driven by AC voltage referenced to ground via matched resistors to preserve tonal warmth and plasticity; preamp tubes are DC-lit to ensure absolute operational silence even under maximum high-gain registers.
🎛️ TECHNICAL NOTE: THE ACTIVE TONE SECRET (Baby Blues 30 & Fat Boy)
Unlike the Pro series, the Baby Blues 30 and the Fat Boy platform feature a sophisticated filtration architecture on the first gain stage of the clean channel:
• Cathode Innovation: Moving away from traditional passive tone shaping, this system deploys calibrated RC networks tied directly to the cathode of the preamplifier tube.
• Sculpting Tone at the Root: Utilizing variable resistors in series with multi-value capacitors, the amplifier fine-tunes the local gain of the tube at highly specific target frequencies.
• The Result: The architecture sculpts the core body, focus, and brightness of the instrument before the signal ever reaches the traditional tone stack. This yields a three-dimensional, organic clean tone that actively responds to the unique identity of your guitar's tonewoods.
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – BABY BLUES
Feature
Technical Details
Baby Blues (Andy Roman Original Project)
Nominal Power
30 Watt
Measured Power
25 Watt RMS
Construction
Point-to-Point wiring
Operating Class
Class AB with Cold Bias
Preamp Tubes
5 x 12AX7 (ECC83)
Rectifier (Vacuum Diode)
5R4 (for warm and natural compression)
Sonic Character
Warm sound, tube compression, and high dynamic response
Speaker Outputs
Fixed 4 Ohm / 8 Ohm impedance
The Baby Blues Pro features a vacuum-tube rectified preamplifier section, diverging from industrial standards to deliver superior harmonic response and analog warmth. Derived from audiophile technology, this design ensures clean plate voltage, providing a three-dimensional audio quality unattainable with standard solid-state rectifiers. The translated technical documentation for the 2000 Andy Roman Power Supply Circuitry is available on the manufacturer's website.
🎸 Andy Roman Baby Blues Pro (100W Flagship) – Original Project and Tone Evolution since 2000
"Developed directly from the original year-2000 circuits of its 30W predecessor, the Pro version represents its high-power (100W) evolution. This project keeps the absolute signal integrity of Andy Roman intact, refining every engineering node to meet the rigorous demands of the stage and the professional musician."
The Baby Blues Pro stands at the absolute pinnacle of our electroacoustic research. Born from the experience and conceptual matrix of the original 30W model, the "Pro" version optimizes every circuit path to deliver a definitive instrument characterized by uncompromising dynamic range.
🔊 THE CORE OF THE TONE: EL34 QUARTET AND ABSOLUTE DYNAMICS
Built around an output stage driven by a strictly matched quartet of EL34 vacuum tubes, the Baby Blues Pro delivers an authoritative, focused power rich in even-order harmonics. The rigorous design choice to completely eliminate Negative Feedback (NFB) allows the power section to breathe naturally, yielding a three-dimensional soundstage that reacts instantaneously to the most infinitesimal nuances of your touch and volume management directly from the instrument.
📐 AUDIOPHILE ENGINEERING APPLIED TO THE GUITAR
The power supply module and the entire signal path feature elite military-grade and audiophile component selection:
• Paper-in-Oil (PIO) and Polypropylene Capacitors: Explicitly selected to guarantee an extremely smooth, linear mid- and high-frequency reproduction, completely free from acoustic fatigue.
• Dual Rectifier: Provides the capability to switch between Vacuum Tube Rectification (for a linear "sag" and a natural compression across the spectrum) or Solid-State Rectification (for an immediate, percussive attack velocity focused on fast transients).
• Maximum Silence, Maximum Warmth: Power tube filaments are AC-lit and referenced to ground via matched resistors to preserve the intrinsic warmth and plasticity of the tone; the preamplification section is entirely DC-lit to eliminate any residual hum or background noise.
🎛️ DUAL-CHANNEL VERSATILITY
• Clean Channel: Crystalline, linear, and deep, backed by Silver Mica and Tantalum capacitors—noble materials that ensure absolute transparency and perfect focus on the fundamental frequency.
• Lead Channel: Developed directly from the proprietary "F.U.C.K." circuit DNA, this stage delivers a dense, fluid, and highly stable gain structure. It is engineered to push into warm, highly articulate saturations while fully maintaining exemplary note separation and definition, even throughout complex polyphonic passages.
"The Baby Blues Pro is not merely an amplifier; it is a manifesto of avant-garde electronic craftsmanship, engineered for those who demand perfection in Italian vacuum tube physics."
The heritage and authenticity of this historical development path are fully documented online, where the very first prototype—handcrafted entirely without LCR networks—remains visible.
Baby Blues Pro – Cathode EQ Edition (Special Variant)
For the Tone Purist.
This exclusive version features a Cathode Follower EQ on the clean channel. By lowering the impedance before the tone stack, this circuit ensures:
Absolute Transparency: No signal loss, keeping the highs crystal clear and the lows tight and punchy.
Pedal Ready: The perfect "blank canvas" for your pedalboard, preserving every nuance of your original signal.
Superior Dynamics: An almost instantaneous response to your picking attack.
Power: 100W (No NFB) / 30W (Legacy)
Tubes: EL34 Power Stage
Components: Allen Bradley, Tantalum, Paper-in-Oil, Polypropylene.
Switching: MIDI Compatible (via external switcher).
Special Feature: Optional Cathode Follower EQ for Hi-End clean tones.
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – BABY BLUES PRO
Feature
Technical Details
Model
Baby Blues Pro (Andy Roman Custom Evolution)
Power Output
100 Watt RMS
Construction
3D Point-to-Point wiring
Power Tubes
4 x EL34 (Also configurable with 6L6 upon request)
Preamp Tubes
5 x 12AX7 (ECC83)
Power Supply (Power Amp)
Solid State (Diodes) for maximum headroom and reliability
Power Supply (Preamp Stage)
Tube-rectified with 5AR4 / GZ34 (for enhanced warmth and dynamics)
Effects Loop
Transparent Serial Loop
Speaker Outputs
4 / 8 / 16 Ohm impedance selector
Reference Project 2001: "Unique Edition" Preamp (The Genesis of Tube 100)
"This original 2001 handwritten schematic represents one of the pinnacles of our research into extreme dynamics. Conceived as a Unique Edition to meet the technical demands of a renowned Italian guitar virtuoso, the circuit stands out for its extraordinary structural complexity, essential for preserving every nuance of touch and playing speed.
The architecture of this preamplifier was so innovative and high-performing that it later became the beating heart and sonic DNA of the Tube 100 system. Documenting this study today means revealing the roots of a sound that refuses compromise, where engineering is pushed to the limit to serve raw talent."
"Technical Insight: The Challenge of Extreme Dynamics (2001)"
"The 'Unique Edition' Preamplifier was born from a specific design challenge: to create a system capable of remarkable harmonic emphasis, essential for fingerstyle phrasing and extreme vibrato arm techniques. While the core architecture draws from the Tube 100 DNA, the circuit underwent extensive redesign and optimization at every gain stage. This radical intervention on response speed and harmonic structure resulted in a truly unique unit, capable of keeping every note alive and defined even under the most profound dynamic excursions."
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – "EDIZIONE UNICA" PREAMP (2001 PROJECT)
Feature
Official Technical Details
Model
Reference Preamp "Edizione Unica" (Unique Edition)
Genesis
Original 2001 project (The core DNA of the Tube 100 system)
Technical Goal
Optimized for virtuosity, whammy bar techniques, and fingerstyle playing
Architecture
High-speed response gain stages
Sonic Character
Extreme emphasis on harmonics and note definition
Circuit Design
Radical redesign of the gain stages (Heavy Modification)
Build Philosophy
High-structural complexity Point-to-Point wiring
Target
Custom-built for a professional guitarist (Custom Shop)
🎸 Andy Roman "666" – Extreme Custom Edition (One-Off)
"Born from a specific engineering challenge to explore the boundaries of ultra-high density saturation, the 666 model is a unique, one-off instrument. While stepping away from the lab's traditional vintage-leaning configurations, this 100-Watt RMS amplifier demonstrates how Point-to-Point architecture can govern extreme gain registers, binding them to strict control and absolute micro-dynamic precision."
Dynamics and Compression: Synthesizing a Complex Balance
Within this exclusive platform, we have proven that heavy harmonic structuring and extended transient response can harmoniously coexist:
• 100W RMS Power (No NFB): Despite deploying an imposing amount of gain, the total elimination of Negative Feedback (NFB) preserves the power section's natural breathing, keeping the signal wide open and highly reactive to pick attack.
• Dual Isolated Channel Architecture: Engineered to provide an instantaneous shift from a highly linear, high-headroom clean channel to an analog distortion stage that is dense, compact, and deeply visceral.
• The Project's Core — Second Stage RLC Network: Diverging from traditional passive tone filtering, the "666" integrates a sophisticated RLC (Resistor-Inductor-Capacitor) network directly into the second preamplification stage. By leveraging the physical reactance of the inductor, this solution shapes mid-range articulation with surgical precision, delivering an extraordinary percussive impact while safeguarding absolute note intelligibility, even throughout heavily dropped tunings.
"The 666 model is not merely a high-gain head; it represents a sophisticated electroacoustic study on harmonic management and control under boundary saturation parameters."
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – "666" MODEL (ONE-OFF)
• Typology: High-Gain Extreme Custom (Unique Piece / One-Off)
• Power Output: 100 Watt RMS
• Construction: 100% Handcrafted 3D Point-to-Point air-wired circuit
• Configuration: 2 Completely isolated circuit channels (Clean / High-Gain)
• Negative Feedback (NFB): No NFB (Zero Negative Feedback) for ultimate dynamic headroom
• Technical Innovation: Resonant RLC (Resistor-Inductor-Capacitor) network integrated into the 2nd gain stage
• Power Section: Power amp architecture and high-speed, fast-recovery diode power supply derived from the Fat Boy platform
• Design Objective: Surgical transient control, high-impact articulation, and absolute polyphonic definition across extended ranges
Andy Roman 4x12 "Straight Cabinet"
Our 4x12 cabinet is built with high-end audio engineering principles, far beyond industry standards.
Premium Materials: Constructed from high-grade Birch Plywood, reinforced with Spruce and Marine Plywood for maximum structural integrity.
Inertial Internal Coating: To eliminate unwanted cabinet resonances, the interior is treated with a unique blend. This ensures an inert enclosure where only the speakers' true voice is heard.
Efficiency: 103 dB (1W/1m). With a 16 Ohm impedance, this straight cabinet delivers a massive, focused, and uncolored soundstage.
Structure: Birch / Spruce / Marine Plywood.
Internal Treatment: Vinyl Glue & Cement Coating (Anti-Resonance).
Efficiency: 106 dB.
Speakers: 4x Celestion V30 (16 Ohm).
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – 4x12 GUITAR CABINET
Feature
Technical Details
Configuration
4 x 12" (Four 12-inch loudspeakers)
Speakers (Options)
Celestion Vintage 30 / Greenback / G12H75-100 (user's choice)
Sensitivity
Up to 103 dB (varying based on the selected speaker model)
Impedance
4 Ohm or 16 Ohm (selectable/configurable)
Cabinet Materials
Birch Plywood and High-Density MDF
Internal Bracing
Marine Plywood and Solid Spruce
Proprietary Technology
Custom stiffening insulation by Andy Roman
Sonic Character
Ultra-rigid structure for maximum projection and zero spurious resonances
🔊 Andy Roman Custom Tube Amp
Deep Hell 4x10
"A high-efficiency loudspeaker system for electric bass, developed from large-scale linear reproduction designs and engineered to secure the perfect balance between sub-low frequency extension and micro-dynamic articulation."
The Deep Hell 4x10 pushes the boundaries of low-frequency reproduction within instrumental performance, introducing the architectural principles of Jensen-Onken acoustic loading into a high-performance bass cabinet.
📐 ACOUSTIC ENGINEERING: THE JENSEN-ONKEN LOADING
Diverging from common industrial bass-reflex cabinets that suffer from port turbulence and air compression, the Deep Hell implements a front lower port alignment strictly calculated according to Onken parameters.
• Transient Response Velocity: Symmetrical control over cone displacement guarantees a lightning-fast response and razor-sharp note articulation, effortlessly tracking the most complex and percussive playing techniques.
• Linear Low-End Extension: A natural, tight, and deep low-frequency roll-off, entirely free from the harmonic distortions and artificial choking typical of conventional reflex ports.
🔊 COMPONENT SELECTION & HARMONIC REFINEMENT
• Core of the System: 4 Selected Eminence Beta 10-inch transducers, configured to deliver a massive soundstage and absolute impedance stability.
• High-Frequency Detail: A dedicated compression driver coupled with a high-performance horn, explicitly assigned to refining upper-register detail and projecting the instrument's higher harmonics.
• Elite Audiophile Crossover: The tweeter is managed by a custom 3rd-order filter (18 dB/octave) centered at 5 kHz. This steep slope guarantees a seamless, phase-coherent transition at the crossover point between the woofers and the driver, protecting the component while completely neutralizing any high-frequency harshness or acoustic asymmetry.
🛠 OFFICIAL TECHNICAL SPECIFICATIONS – DEEP HELL (4x10)
• Loudspeaker Configuration: 4 x 10" (Four High-Excursion 10-inch Woofers)
• Transducer Model: Selected Eminence Beta 10
• Power Handling: 1000 Watt RMS (Optimized for maximum output performance and coupling with high-voltage tube power sections)
• System Sensitivity: Approx. 103 dB SPL (High Efficiency) - Dual Stack Ready
• Nominal Impedance: 8 Ohm or 16 Ohm (Configured to client specification)
• Acoustic Design: Lower Jensen-Onken port alignment for a deep, tight, and highly linear bass response
• Crossover Architecture: Proprietary high-precision 3rd-order filter (18 dB/octave slope) with zero insertion loss
• Cabinet Construction: Rigid composite chassis utilizing high-density MDF with internal structural bracing and damping in Marine Grade Plywood and Solid Spruce, engineered to eliminate standing waves
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