The Silent Underground Studio BStar GT75 Cabinet IR Pack is a meticulously crafted collection of impulse responses (IRs) designed to elevate your guitar tone to the next level. Built for producers, guitarists, and audio engineers, delivering unparalleled tonal versatility for studio and live applications.
 
 
What’s Inside?
 
Premium Cabinet Capture: Built from a legendary Blackstar™ Series One 4x12 cabinet paired with the renowned Celestion™ G12T-75™ speaker, known for its aggressive bite and tight low-end, delivering powerful, articulate tones perfect for modern rock and metal.
 
Top-Tier Microphone Array: Captured with a selection of world-class mics:
Close Mics: Dyn57, Dyn 7B, Dyn421, Dyn906, Rib121, Con87
Room Mics: Room87, Room414, Room C12
 
 
Unrivalled Precision:
 
Close Mics: 51 X-axis positions, from cap center to outer cone, captured in micro-increments using the cutting-edge Dynamount™ robotic microphone stand. This granular detail lets you pinpoint the perfect tone, often missed by packs with static mic placements.
 
Room Mics:
Room87: Starts at a 6-foot height, moving upward in 6-inch increments, positioned approximately 8 feet from the cabinet, on-axis with the speaker.
Room414: Starts at a 1-foot distance, moving backward in 6-inch increments, positioned approximately 3 feet high, on-axis with the speaker.
RoomC12: Starts at a 1-foot distance, 45 degrees off-axis, moving backward and away in 6-inch increments, positioned approximately 1.5 feet high, pointed off-axis at the speaker’s cap center.
 
Beast Blend IRs: A unique blend of cap, cap edge, and cone positions for each close mic, mixed at equal volume before sine wave deconvolution. These IRs deliver a balanced, slightly dark tonal profile, offering a versatile, mic-specific representation ideal for quick, professional-grade results across genres.
 
 
Multiple Formats for Maximum Compatibility:
WAV Formats: 44.1 kHz / 16-bit, 48 kHz / 24-bit, 96 kHz / 24-bit
Fractal Audio®: Ultra Res and Standard Res in both .syx and .IR formats
Kemper®: 44.1 kHz / 16-bit .wav for Rig Manager
Headrush®: 48 kHz / 24-bit .wav
Helix®: 48 kHz / 16-bit .wav
 
 
Why 50 X-Axis Positions?
Using the Dynamount™ system, we captured micro-adjustments that reveal the subtle tonal nuances critical for professional studio recordings. Unlike other IR packs with pre-set positions, our approach ensures you can dial in the exact sound you need for your mix.
 
 
RAW IRs with Smart Filtering
Our IRs are captured as close to RAW as possible to preserve the authentic character of the Blackstar™ Series One 4x12 cabinet and Celestion™ G12T-75™ speaker. The only processing applied is subtle corrective filtering above 8 kHz to tame harshness and eliminate unwanted resonant frequencies. This ensures you can easily boost treble to cut through any mix without exposing unwanted resonant frequencies, giving you maximum flexibility and a polished, professional sound.
 
 
Why Choose This IR Pack?
This isn’t just an IR collection—it’s a tonal playground designed for flexibility and creativity. From crushing metal riffs to soaring blues leads and lush ambient textures, this pack empowers you to shape your sound with surgical precision. The micro-increment captures replicate the detail of real-world studio sessions, making this a must-have for anyone serious about guitar tone.
 
 
Disclaimer
Blackstar, Celestion, G12T-75, Dynamount, Fractal Audio, Kemper, Headrush, Helix are trademarks of their respective owners and are not affiliated with Silent Underground Studio. These names are used for descriptive purposes only to indicate the equipment used in creating this IR pack.
 
 
Get Started
Load these IRs into your preferred convolution reverb, amp simulator, cabinet IR loader, or compatible hardware and explore the vast tonal possibilities. Experiment with the diverse mic positions and formats to craft your signature sound.