BigBlockPre LE – Free Discrete Console Preamp VST
€0
amp plugin inspired by the classic API 312 signal path, with transformer and 2520-style op-amp colour for added weight, punch, and character.
Discrete console. In a slot. Free.
BigBlockPre LE is a free discrete preamp plug-in inspired by the classic API 312 signal path: input transformer, 2520-style discrete op-amp, and output transformer.
Use it to add weight, density, forward push, and a little transformer colour to tracks that feel too clean or flat. Push the GAIN, pull back the OUTPUT, and let the circuit do the work.
Windows VST3 · macOS VST3 / AU · Apple Silicon native
Download BigBlockPre LE — Free
What It Does
BigBlockPre LE is designed for one simple job: making digital sources feel more physical.
It works especially well on drums, bass, vocals, room mics, synths, samplers, and virtual instruments — anywhere you want more density and presence without turning the sound into obvious distortion.
At lower gain settings it can sit quietly across a mix. Push it harder and the transformers and discrete amplifier begin to contribute more colour, compression, and harmonic movement.
The LE Signal Chain
BigBlockPre LE uses one fixed signal path:
- 2622-style input transformer
- 2520-style discrete op-amp
- 2503-style output transformer
- Passive output attenuation
No model browser. No fifty flavours of “analog.” Just one discrete console chain designed to be useful immediately.
Controls
- PAD — reduces the level hitting the input stage and gives you more room to drive the amplifier deliberately.
- GAIN — drives the discrete amplifier and the rest of the signal path. Turn it up for more weight, colour, and push.
- OUTPUT — passive output attenuation. Use it to bring the level back down after driving the circuit.
- LINK — links GAIN and OUTPUT in opposite directions, making it easy to push the circuit harder without a large change in output level.
Not Another Saturation Plug-In
BigBlockPre LE is built around the behaviour of a complete discrete preamp signal path rather than a single generic saturation curve.
The input transformer, amplifier, and output transformer each contribute differently as level changes, so increasing GAIN changes more than harmonic distortion alone.
The result is deliberately subtle at normal settings and increasingly characterful when pushed.
From LE to Pro
LE gives you the core BigBlockPre sound with one fixed console configuration.
BigBlockPre Pro expands the same idea into a socketable console, letting you swap different input transformers, discrete op-amps, and output transformers to build different signal paths inside the plug-in.
If you just want a good discrete console channel, LE is complete as it is.
If you want to start changing the hardware inside the imaginary console, that is what Pro is for.
System Requirements
- Windows: Windows 10 or 11, 64-bit
- Windows format: VST3
- macOS — Apple Silicon: macOS 11.0 (Big Sur) or later
- macOS — Intel: macOS 10.13 (High Sierra) or later
- Mac architecture: Universal Binary, native Apple Silicon and Intel support
- Mac formats: VST3 and AU
- Sample rates: 44.1, 48, 88.2, 96, 176.4, and 192 kHz
- Compatible VST3 or AU host required
- Internet connection required for initial license activation
The macOS version is distributed as an Apple-notarized installer and can be installed without additional security configuration.
v1.0.0 — Initial release. AP2622 → 2520 → AP2503 chain, WDF and FAST engine modes, PAD / LINK / GAIN / OUTPUT controls, and preset management.
BigBlockPre is a circuit-level VST3 preamp plug-in that models a socketable discrete console channel. It uses Wave Digital Filter (WDF) models of an input transformer, a 2520 style discrete op-amp gain stage, and an output transformer, wired the way an API 312 style channel is wired. It is not a saturation preset and it is not a channel strip. It is one console channel that you can drop on any track.
The chain is: input calibration, passive PAD, input transformer (AP2622 in LE), 2520 discrete op-amp gain stage, output transformer (AP2503 in LE), and a passive output attenuator. GAIN drives the trim resistor in the 2520 feedback network. OUTPUT is a passive attenuator at the output transformer secondary. In LE this chain is fixed. In Pro every socket is selectable.
High quality is the reference audio engine. Every stage is a Wave Digital Filter model built from the actual circuit and winding data. FAST is a lighter surrogate derived from the same High quality reference. It is state-aware, so it tracks the reference much more closely than a memoryless look-up table would. FAST is the default because it costs less CPU. High quality is one click away when you want the reference path on a mix bus or a difficult source.
No. BigBlockPre is a console that does not exist. It is built out of the components that shape the API 312 sound (AP2622 style input transformer, 2520 discrete op-amp, AP2503 style output transformer), but the assembled channel and its behaviour are our own. Magnetic parameters that transformer datasheets do not fully specify are treated as fit parameters, tuned so each model matches the published behaviour of its family rather than a datasheet-quoted value.
44.1, 48, 88.2, 96, 176.4, and 192 kHz. BigBlockPre runs on Windows VST3 · macOS VST3 / AU · Apple Silicon native
LE is the free entry point. It ships one fixed chain (AP2622 → 2520 → AP2503), one DOA, and both High quality and FAST engines. Pro takes the same discrete console concept and makes every slot selectable in the plug-in: input transformer, DOA (2520, 1731, 990, AM10, OA10), and output transformer. Because the DOA sets the closed-loop gain law, changing the DOA in Pro changes what the GAIN knob actually means.
