PowerPacks
The magical sound of a tube amp on full blast has been the holy grail of guitar tone since Jimi Hendrix lit his Strat on fire at Woodstock. Many products attempt to capture that iconic tone at lower volumes, but few deliver the real thing—and some (like reactive load boxes) can burn out your power tubes in no time.
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With Neutron Audio PowerPacks, we’ve created authentic profiles of several tube power sections that allow you to bring back that loud amp sound without destroying your tubes or your ears. But it doesn’t stop there—combine these power amp profiles with our included preamp and speaker profiles, and you’ll be crafting completely new tones.
Power Amp Profiles and Why You Need Them
Guitar amplifiers consist of two key sections: the preamp, which shapes the tone, and the power amp, which adds the compression and saturation that make amps sound magical. In vintage amps, the power amp stage is responsible for much of the iconic tone, but achieving this often requires dangerously loud volumes. Modern amps focus more on the preamp to work at quieter levels, losing some of that magic. With Neutron PowerPacks, you can now experience the legendary "loud amp" sound without the ear-splitting volume, giving you the rich, authentic tone of a cranked amp at any level, without damaging your tubes or disturbing the neighbours.
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What’s Included:
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10 NAM Profiles of your selected pack power stage, captured at 2 volume levels and 5 presence settings for a wide range of tonal flexibility.
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3 Preamp Profiles from classic amps (Clean, Crunch, and Lead): Fender Twin, Marshall JCM800, and Soldano SLO.
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4 Quantum Speaker Profiles featuring different cabinet types (Vintage 4x12, Modern 4x12, Open-Back 2x12, Open-Back 1x12).
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3 Additional Filter IRs to customize your Quantum Speaker sound further.
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PowerPack Intro
Double the Realism – Double the Tonal Possibilities​
By modeling the preamp and power amp sections separately, Neutron Audio PowerPacks deliver a level of realism unmatched by other digital modeling products. While tools like Neural Amp Modeler excel at complex amp profiling, dividing the process further elevates the accuracy and lets you explore new creative possibilities.
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EL34 Power Stage for tight, punchy mids.
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6L6 Power Stage for deep, warm lows.
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EL84 Power Stage for sparkling highs and responsive attack.
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​6V6 Power Stage for warm, Midrange-rich tones.
And now, with the ability to pair any preamp profile with your choice of power amp stage, the creative combinations are endless.
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Features
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10 NAM profiles per pack, clearly labelled for easy selection
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2 different volume levels and 5 different presence settings for maximum flexibility
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3 NAM profiles of the preamps only of a Fender Twin clean, Marshall JCM800 2203 Crunch + Soldano SLO.
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4 Quantum Speaker profiles of a mixture of speakers and cabinet types
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3 Additional Filter IRs to tweak your Quantum Speaker sound.
Interactive Demo : No EQ or FX
Experience each of the Powerpack Profiles each paired with a Plexi Pre amp and Greenback Speaker!​
The first Sample is just the Plexi and the Greenback Speaker with no Power amp. Hear how much the pre amp shapes the tone. And again independently modelled from the Poweramp
PowerPack! 3 additional Pre amps and 3 Speaker Quickstarts. For Free!
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amp +
Speaker Profile
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Pre
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Pre
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Pre
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Pre
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Not All Amp Modeling Algorithms are Equal
In many digital amp modeling products (especially those on the lower end of the market), the unique qualities of the power amp’s sound aren’t fully or faithfully captured. The reason lies in the complexity of the power amp itself, which involves factors like:
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Compression and even-order harmonic saturation
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Presence control through a negative feedback loop
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Effects of voltage delivery, sag, and bias
Capturing these qualities is as challenging as profiling a preamp circuit with multiple gain stages. Due to this complexity, the power section in digital models is sometimes reduced to a basic algorithm or blended with the rest of the amp’s sound, losing the independent, non-linear characteristics of the power stage.
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For modern high-gain amplifiers, which rely heavily on the preamp, this may not affect the sound significantly. However, with vintage amps, the power stage plays a crucial role in shaping the overall tone, particularly at high volumes. Profiling these amps accurately requires capturing that distinctive power stage behavior, especially at the “edge of breakup” and lower gain settings.
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As fewer players experience the “loud amp sound” firsthand, digital modeling products have generally focused less on replicating power amp dynamics. This is why some simulations handle high-gain sounds well but struggle with capturing the nuanced character of low to medium gain settings, where the power amp’s non-linear behavior shines.
Current Power Stage Line up :
6L6 Power Tube
History:
The 6L6 was indeed introduced by RCA in the 1930s and became one of the first widely used power tubes for amplifiers. Known for its clean, clear, and powerful sound, the 6L6 is excellent for handling high wattage. Its tone is generally smooth and balanced, with strong bass response and a clear top end, making it ideal for clean tones but also highly responsive in overdrive.
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Famous Amps:
The 6L6 is famously used in Fender amps like the Twin Reverb, Super Reverb, and Bassman, providing a distinctive clean sound with powerful low-end. Mesa/Boogie amps also utilize 6L6s for their high headroom and dynamic overdrive capability.
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6V6 Power Tube
History:
The 6V6 was also developed in the 1930s and has become known for its warm, midrange-rich tones. It is particularly valued for its smooth breakup at lower wattages, making it a favorite for players who prefer natural, tube-driven overdrive without excessive volume.
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Famous Amps:
The 6V6 is indeed iconic in Fender amps like the Deluxe Reverb and Champ. It is also popular in boutique amps where its vintage character and smooth, musical breakup are desired at lower power levels.
EL34 Power Tube
History:
The EL34 was created by Mullard in the early 1950s and became a foundational tube for British rock music. It is known for its punchy midrange, aggressive breakup, and higher output compared to its American counterparts, making it a favorite for higher-gain applications and British-style crunch.
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Famous Amps:
EL34 tubes are central to Marshall amps like the Plexi and JCM800, where they contribute to the signature British sound with punchy mids and detailed highs. They’re also used in amps from Orange and Laney, contributing to the characteristic "British" rock tone.
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EL84 Power Tube
History:
The EL84 emerged as a lower-wattage alternative in the 1950s and quickly became popular in British amps for its distinctive chime, bright response, and musical breakup. Known for delivering a mix of warmth and clarity, EL84s are highly responsive and provide organic, touch-sensitive overdrive.
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Famous Amps:
EL84 tubes are central to the classic Vox AC15 and AC30 amps, where they contribute to the characteristic "jangle" and clarity, especially well-suited for clean and slightly overdriven tones. They’re also used in Matchless and Dr. Z amps, lending versatility and brightness for rock and blues.
Benefits
Discover the benefits of the Neutron Quantum Speaker Profile Pack.
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Feel the Thunder.....
Access the magic of a valve poweramp on full blast - At any volume
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Supercharge your preamp sound at any volume, without wearing out your tubes. NICE!
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Can be used and has many advantages over a load box!
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Double the realism! Profiling both the preamp and power amp sections separately enhances accuracy potential.
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Real Non Linear behaviour captured- Not simulated
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Quick fire round! Utilising one of the coolest functions : Real amp - Poweramp on standby!!
#SAVEYOURTUBES
@GingerLef :
Check Youtube https://www.youtube.com/watch?v=DlFKmnGqn4A
3 weeks ago
I’ve been testing the quantum greenback against my favourite greenback impulse responses and I have to say I think that the quantum speakers are definitely better. You are definitely on to something here
Ok. I bought the first Greenback Quantum XL Pack. LOVE IT!!! BUT…… I have to ask are you coming out with a Vintage 30 pack? I’m ready to buy it now….lol (thanks for taking the time to do all of these, great work)
Greger Lindberg
​When will this beast be out in full? Best speaker i found in the box! Kinda want more.
