Space vs Springs: The Reverb Showdown You Should Understand
Capture YOUR IDEAS
You may have noticed that Ampknob Duet and Ampknob Fatman both have two reverbs included: a spring reverb in the amp and a “Room” reverb in the control bar. And no, it’s not overindulgence; there are key differences between them that should be understood in order to get the most out of each!
The key to unlocking ultimate tone is through understanding how each reverb is created and, importantly, where each reverb acts in your signal chain.
Let's break it down.
Character & Texture
Stereo Studio Room Reverb
This is all about pristine, three-dimensional realism. It stems from a capture of a real room, providing ultimate “realism”. Because it's in stereo, it spreads your signal wide across the left and right speakers, creating a massive sense of depth, air, and warmth. It wraps around your notes - adding an extra dimension to your sound.
The rooms featured in Ampknob Duet and Ampknob Fatman were both captured at Fascination Street Studios: purpose-built, state-of-the-art recording spaces - literally designed to sound good.
Bonus tip: stick on a pair of headphones to really feel like you’re in the same room as the amp. Thank us later!
Tube Amp Spring Reverb
This is a mechanical reverb that was built into many vintage amps. The sound is literally shot down a set of metal springs inside a tank. The result? A dark, lo-fi, beautifully imperfect texture characterized by that iconic, metallic "boing" and splashy attack. It doesn't naturally fuse with your sound like a room reverb; it adds a distinct character on top.
Signal Chain Placement
Stereo Studio Room Reverb
By virtue of the type of reverb, room reverb must sit after your amp and speaker cabinet in the signal chain. Sound has to come out of the speakers, enter the room, reverberate, and then get picked up by a microphone in the room to be recorded.
Because it sits at the end of the chain, it takes your finalized guitar tone and places it into a virtual room. The reverb itself stays perfectly clean, clear, and separated from your core tone.
Tube Amp Spring Reverb
In a classic tube amplifier, the spring reverb isn't the bread - it’s the filling of the sandwich. Crucially for Ampknob Duet and Ampknob Fatman, the spring reverb circuit is placed before the tremolo circuit and the power tubes, just like their real-life inspirations. This routing completely changes the game.
Power Amp Saturation:
When you crank your tube amp into that sweet, natural overdrive, you aren't just distorting your dry guitar signal; you’re distorting the reverb tails. The power tubes compress and saturate the reverb, making it thick, wild, and gritty.
On top of this, when the tubes are saturated, there’s not enough "room" for the spring reverb to sit on top of your tone. In this situation, whichever signal is louder "wins" - typically, this is your main guitar tone. What does this sound like? Well, it kind of sounds like your reverb is side-chained with your main guitar tone. When you are playing, your guitar tone dominates the sound, with little to no reverb audible. But, in the gaps between notes, the reverb rears up and fills the space. It’s unique and totally unpredictable, but glorious when dialled in!
Tremolo’d Reverb:
In vintage amps, the guitar signal often hits the spring reverb tank before the vibrato (tremolo) circuit. The volume modulation of the tremolo affects the reverb decay, along with the main guitar signal, creating that classic, swampy, pulsing vintage vibe. It’s a wonderful way to add movement to spaced-out tones.
A Long Story Short
Studio reverb is an innocent bystander, reacting naturally to the sound it receives.
Tube amp spring reverb, on the other hand, is a participant in the chaos. It splashes, warps, gets squeezed and mangled right along with your main guitar tone.
When used together, there’s not much better!