Bogren Digital AmpKnob BH4

The Ampknob BH4 plugin captures the unmistakable authority of a modern high-gain classic; an amp built for absolute tightness, surgical detail, and unwavering control under extreme distortion.

Its focused midrange and firm low end have made it a defining tool in contemporary metal production.

Inside Fascination Street Studios, this amp holds a distinct place in Jens Bogren's workflow.

It's the unit he often reaches for when a mix needs a rhythm tone that stays locked, steady, and readable no matter how dense the arrangement becomes.

When Jens needs a guitar tone that refuses to fall apart, the BH4 is one of the first amps he turns to.

Legendary Channels 3 & 4

The BH4 is one of the most respected high-gain amplifiers in modern metal.
 
Channels 3 and 4 deliver exceptional thickness and clarity and remain stable even under the most aggressive riffing.

Two Cabs

Included are two perfectly matched cabs, Modern and Vintage, giving you instant mix-ready tone without compromise.

You also get the option of loading up your favorite IR from the Bogren IR packs or any other IR of your choice.

Capture Your Ideas

When inspiration strikes, every second counts before that golden riff is gone forever.

With Ampknob, you can capture your ideas quickly and easily without even starting a DAW.

The standalone version of Ampknob includes a built-in recording functionality that makes it effortless to always stay creative.

A scratch book has never been this inspiring!

Stay In Time, Stay In Tune

The standalone version of Ampknob now comes with a built-in metronome for you to stay sharp at your guitar playing skills.

Change meter, accent, or set automatic speed increments so you can focus on practicing without even taking your hands off the guitar.

The excellent built-in tuner means you're always ready to jam!

The Perfect Tone

The perfect speaker cabinet, microphones, and recording chain have been expertly chosen and dialed in by producer Jens Bogren to capture the tone with outstanding detail.

If you feel like experimenting, you can disable the cab or even load your favorite impulse response right from the plugin.

The Future of Speaker Modeling

Bogren's IRDX (Impulse Response Dynamix) technology breathes life into the guitar sound by adding dynamic and true-to-life speaker behavior to static impulse responses.

IRDX technology, developed by producer Jens Bogren, uses advanced machine learning methods to reconstruct the difference between a real cab and an impulse response.

The end result is a guitar amp sim that reacts like a real amp, easily fits in a mix without sounding stale, and feels great when playing through.

Impulse Responses are excellent at capturing the tonality and resonance of a guitar cabinet, but by nature they are only a static snapshot in time.

By itself, an impulse response has the tonal characteristics of a real cab but without dynamics, it creates a lifeless, fatiguing sound.

Real-life guitar speakers react dynamically to the input from the amplifier. They move air, compress, and break up depending on how hard they are being pushed by the amp.