Factory & Farm 4140 Red Frame 2x12 IRs v1.0

37 impulse responses of the original red-frame McKenzie 80-watt speakers found in a late-1970s Marshall "Club and Country" 2x12 open-back combo. It’s a warm, smooth, vintage voice with a big low-mid body and a soft top end that never turns harsh, at home on everything from glassy cleans to classic rock crunch. These are speaker IRs only, not an amp sim.

48 kHz / 24-bit WAV, 200 ms. Works in ToneX, amp-sim plugins, DAW convolution and most IR loaders.

WHAT'S IN THE PACK

421/ 12 IRs - a large-diaphragm cardioid dynamic (421 type)

88RP/ 12 IRs - a figure-of-eight RP dynamic (88RP type)

201/ 12 IRs - a hypercardioid dynamic (201 type)

FF4140 Red Frame - Full Speaker (no mic).wav

Thumbnails/ artwork for loaders and presets that show pictures

Each microphone folder covers four positions at three distances:

Cap on the dust cap - brightest

Cap Edge where the cap meets the cone

Cone on the cone, between cap and edge - warmer

Cone Edge out near the edge - darkest

1in at the grille cloth (the usual live position)

4in a little back - less proximity bass, the positions blend

12in a foot back - the speaker as a whole, a touch of the cabinet

FULL SPEAKER (no mic) is the speakers themselves rather than one spot in front of

them: the measurements averaged across the cone and a foot back. Use it when you

want a neutral cabinet, or with your own microphone model.

HOW THEY WERE MADE

The speakers were measured in their own cabinet with Room EQ Wizard, a flat

omnidirectional measurement microphone and an audio interface, at about 100 dB SPL:

at the grille in front of the cap, the cap's edge and the cone, and centred 12 inches

back. Each measurement was trimmed before the room's first reflection, so these are

the cabinet, not the room. The cone-edge position was not measured: it is derived

from the cone measurement.

The microphones are MODELLED, not real microphones: each is built from its maker's

published frequency response and proximity curves and applied to the measured

speaker. That is why every position exists for every microphone, and why they line

up perfectly when you blend two.