QS-CABLUE-NDX is recorded with Celestion Alnico Blue  speakers in a Open-back, 2x12 Cabinet. 

This Phase 2 NDX Quantum Speaker pack pack contains:
    • 5 Quickstart profiles with pre-mixed mic blends
    • 27 discrete mics for full, phase-accurate blending control
    • 6 Console Filter IRs for shaping your final output
    • All profiles fully compatible with Neural Amp Modeler (NAM)
 
Each Quantum Speaker pack is designed for playback with NAM (Neural Amp Modeler), a multi-platform solution compatible with a variety of devices and plug-ins. The packs are each themed around a specific speaker and contain 27 discrete mic positions, distributed across 6 professional microphones (2x Dynamic, 2x Condenser and 2x Ribbon) and our proprietary Neutron Sub transducer for precise control of low frequencies. Create endless new sounds of your own by blending microphones, just like a real pro recording session or load one of our 5 included “quickstart” files covering a broad range of pre-made mic blends so you can get a studio-ready sound instantly. Add to all of that 6 IR filter files to tweak even further. 
 
What Is NDX? 
NAM was already the most accurate profiling solution available in terms of frequency content. NDX (Neutron dyNAMix) is Neutron Audio’s bespoke NAM training process — a combination of software, hardware and expertise developed by us to include an additional, deeper layer of time-based dynamic realism. In short, it adds more Dynamics to NAM profiles.. hence the name “dy NAM ix” or NDX for short. The easiest way to hear this clearly in action is by checking out our compressor packs where you will clearly hear extreme, long time-domain compression in action. That was previously not possible with the standard NAM trainer or architecture, NDX adds this extra information to all of our profiles made with it. 
 
NDX allows the authentic profiling of more complex compression, transient recovery, saturation bloom, and time-based level-dependent changes — these are the time-based responses which affect how real gear feels and reacts, not just how it sounds in the frequency domain. NDX also helps to reduce some of the aliasing-like artifacts you can often find in high-gain NAM profiles, as the increased time-domain information reduces frequency averaging for a more natural result; increasing both realism and fidelity across the board. 
 
Historically, this has only been achievable using custom architectures with increased CPU demands and limited compatibility. NDX encodes this extra time-based dynamic information directly into standard format NAM profiles. They will work on any plugin or hardware that natively loads full NAM profiles. It applies equally to compressor, pedal, amplifier, poweramp, and speaker profiles — allowing all of them to behave more like reality and increasing overall fidelity in all cases. 
All profiles in this pack are created using the NDX system. 
 
Celestion Alnico Blue 15W Speaker – Profile Overview - Speaker Bio
Speaker Type: 12" Alnico
Power Rating: 15 Watts
Frequency Range: 75Hz – 5kHz
Sensitivity: 100dB
 
The Legend Behind the Tone
The Celestion Alnico Blue is a celebrated 12" speaker first introduced in the 1950s. Built around an Alnico (aluminum-nickel-cobalt) magnet, it played a central role in shaping the classic British sound and remains iconic for its expressive, vintage character.
 
With its rich harmonic complexity and soft, musical compression when pushed, the Alnico Blue delivers an instantly recognizable tone profile. Its warm lows, sparkling highs, and creamy overdrive make it a top choice for players seeking a blend of vintage soul and dynamic response.
 
Performance Characteristics
Low End: Warm and rounded
Highs: Chimey and articulate
Overdrive: Smooth and musical
Touch Sensitivity: Excellent – responds beautifully to playing dynamics
Best Use Case: Clean tones, blues, classic rock, and vintage-voiced amp setups
 
When loaded into a 2×12 cabinet—particularly semi-open or closed-back Vox-style enclosures—the Alnico Blue gains added depth and projection while preserving its airy top end. It shines with low-to-mid-powered tube amps, where its tonal texture and responsiveness come alive.

Want to learn more?
Visit the Neutron Audio YouTube Channel for quickstart and deep dive videos here:
https://www.youtube.com/@neutron_audio
 
Or come see us, talk to us and get exciting new product news at our Facebook group here:
https://www.facebook.com/groups/1712386306166179
 
All brand names, product names, and trademarks mentioned are the property of their respective owners. Neutron Audio does not claim any affiliation, sponsorship, or endorsement with or by the owners of any trademarks referenced herein. The use of these names is for descriptive purposes only, intended to explain the characteristics of the Quantum Speaker packs and does not imply any association or endorsement.