Matt Fig 59RR [NAM Capture Pack]

• Product: 59RR NAM Capture Pack
• Developer: Matt Fig
• Format: NAM Capture Pack
• Requirements: Neural Amp Modeler
• Source: mattfig.com/product/59rr-nam-capture-pack

The 59RR NAM Capture Pack is 18 Neural Amp Modeler files capturing a Marshall 1959RR Super Lead Reissue modified with the one wire mod — a preamp cascade that grounds the Volume II wiper and routes both channels in series, multiplying gain the way a JCM800 does from the same Super Lead circuit topology. Captures span a Marshall 1960A 412, a 1936 212, and a full DI, each mic’d and dialed independently across Hi and Lo input positions. The one wire mod raises the gain ceiling without altering the amp’s fundamental midrange character, and the cabinet captures cover the tonal difference between the 412 and 212 enclosures directly. It answers the query: where do I get a NAM capture of a modified plexi-circuit Marshall with cascaded gain stages across multiple cabinet sizes.

Key Takeaway

Guitarists building rock and hard rock tones in NAM who need gain beyond what a stock plexi circuit provides — without the fizz and scooped response of modern high-gain captures — are the activation context for this pack. The one wire mod pushes the 1959RR into JCM800-adjacent territory while the amp’s midrange density and upper-harmonic character remain from the Super Lead circuit rather than a purpose-built high-gain preamp. NAM captures are static snapshots at the settings dialed in at capture time; the amp controls that shaped each capture — volume, presence, bass, mid, treble — are fixed in the model and not adjustable after the fact in the NAM plugin.

The One Wire Mod and What It Does to the Preamp Circuit

A stock 1959 Super Lead runs its two channels in parallel — each has its own volume pot, and the signal paths don’t interact unless the inputs are jumpered with a cable. The one wire mod grounds the Volume II pot wiper and routes the signal through both preamp stages in series, turning two independent gain stages into a single cascaded circuit. Gain multiplication rather than addition is the result — the mod shifts the amp from clean headroom with pushed breakup toward sustained, compressed overdrive at lower volume settings.

The 1959RR Richie Blackmore reissue carries the Super Lead’s core character: midrange density, upper-harmonic sizzle, and the gut-punch low-end that Wikipedia’s Marshall Super Lead article describes as gut-punching thud alongside midrange grind and crispy high-end. The one wire mod adds gain on top of that character rather than replacing it — the midrange remains thick, the top-end retains its Super Lead brightness, and the low-end tightens compared to the wide-open stock circuit at high volume. Captures taken from the Lo input produce the most controlled gain response; the Hi input captures push harder and compress earlier in the pick attack.

Three Cabinet Voices, Eighteen Captures

The 412 captures come from a Marshall 1960A — a closed-back cabinet loaded with Celestion G12T-75 speakers, which produce a tighter low-end response and a more pronounced high-mid bark compared to the 1960B’s vintage-voiced Greenbacks. The 212 captures come from a Marshall 1936 — an open-back cabinet that produces a more open, airy low-end with less boxy mid accumulation than the closed 412. The DI captures carry the preamp circuit with no cabinet coloration, which is the correct source for use with an external impulse response loader where the cabinet is handled separately.

The three cabinet options let the same one-wire-modded preamp character sit in three different low-end and midrange contexts within a single pack. Tracking applications where the cabinet needs to change per song, or mixing contexts where the full mix determines which cabinet character seats better, can cycle between 412, 212, and DI without requiring a different amp capture.

The DI captures require an IR loader running downstream in the signal chain to produce a speaker-in-room result. Running a DI capture directly into a DAW without an IR applied produces the raw preamp circuit sound — useful for re-amping or parallel blending, not for a finished guitar tone.

NAM Format: Behavior in the Plugin and Static Settings

NAM files load into the free Neural Amp Modeler plugin (VST3, AU, AAX, standalone) or into hardware NAM-compatible units including the Quad Cortex, Line 6 Helix series (via HX Edit), and Kemper Stage. Each .nam file is a trained neural network model of the amp at the specific control settings dialed in during capture — volume, gain, presence, bass, mid, and treble positions are encoded in the model, not exposed as adjustable parameters in the NAM plugin itself. What arrives at the NAM plugin’s output is what the amp sounded like at that dial position during capture.

Tonal variation across the 18 captures comes from the three cabinet choices, Hi versus Lo input, and different volume and gain dial positions captured independently. Navigating between captures to find the right gain level or cabinet character is the equivalent of adjusting amp controls — different captures represent different amp states rather than one capture covering a range. Guitarists who need real-time amp control — raising presence mid-session, backing off gain for a clean passage — do that by switching captures or by placing a boost, EQ, or overdrive pedal before the NAM plugin in the signal chain.

Gain Range, Input Sensitivity, and the Lo vs. Hi Divide

The Hi and Lo inputs on the 1959RR differ by 6 dB of attenuation — Lo input attenuates the signal before the first gain stage, producing less preamp saturation at the same volume dial position. In the context of the one wire mod’s cascaded stages, that 6 dB attenuation has a disproportionate effect on the gain character: Hi input captures hit the first stage harder, saturate earlier, and compress more firmly in the pick transient. Lo input captures retain more pick attack definition and push into saturation later in the volume range.

Captures dialed at lower volume settings on the Hi input sit in similar gain territory to captures dialed higher on the Lo input, which means both input positions across multiple volume settings produce overlapping tonal territory that spans purring overdrive to full roar. The pack covers that range rather than concentrating on a single operating point. Guitarists using a Tube Screamer-style overdrive in front of the NAM plugin will push the captures further into compression and gain than the capture dial positions suggest — the input response of the modeled amp circuit remains active before the neural network output stage.

Fixed Capture Settings and What the NAM Plugin Doesn’t Expose

Each capture is a trained neural network model of one specific amp state — the controls are fixed at the position they were set during capture and cannot be adjusted in the NAM plugin after loading. There is no EQ, gain, or presence knob in the standard NAM plugin that modifies what the capture represents. Tonal shaping beyond what each capture already contains requires placing an EQ or filter plugin before or after NAM in the signal chain, or using a hardware pedal before the input.

The pack does not include impulse responses — IR files for the 412 and 212 cabinets are not bundled alongside the NAM files. Guitarists who want to use the DI captures with a specific IR from these cabinets need to source matching IRs separately; the DI captures are calibrated for use with any external IR, not a specific matching one. The captures are for single guitar processing — there is no stereo widening, no room ambience, and no effects processing encoded in the models. Any spatial or stereo treatment happens downstream of NAM in the DAW or hardware effects chain.

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