The AF-4 is a virtual-analog lowpass filter module, based on the well-known transistor ladder design. In order to obtain highest quality, this lowpass filter employs a topology-preserving, zero-delay feedback network with 4x oversampling, yielding results comparable to industrial circuit simulator.

You need R2R Reason release and TEAM R2R Reason Rack Extension Cache Builder.

List:

Reason RE Rob Papen BIT v1.0.1-DECiBEL

Reason RE Rob Papen Go2 v1.0.11-DECiBEL

Reason RE Rob Papen MasterMagic v1.0.4-DECiBEL

Reason RE Rob Papen PredatorRE v1.0.20-DECiBEL

Reason RE Rob Papen PunchBDRE v1.0.3-DECiBEL

Reason RE Rob Papen Quad v1.0.86-DECiBEL

Antidote RE is a novel virtual-analog software synthesizer for Propellerhead Reason. This Reason-exclusive device manages to combine the highest audio quality, flexibility and a fast work flow in an extremely easy-to-use Rack Extension. Antidote has been specifically developed to complement Reason, and to perfectly integrate into its environment.

A witch says,

This is a custom tool to enable Reason RackExtension, released by TEAM R2R.

You can now finally enjoy the Reason and its plugins without any internet connections, forever!

The generated cache is only for R2R Reason (with R2R-WAIFU) release.

The cache does not conflict with legit cache.