Celestion Greenback - Marshall 1960TV 4x12 - SM57

I made impulse responses of my Marshall 1960TV 4x12 cabinet loaded with Celestion G12M25 Greenback speakers. I used a Shure SM57 on all four speakers and have uploaded on-axis IRs in 0.25inch (~0.6cm) increments from 1.00” to 2.5” from the cap. Off-axis IRs were captured in 0.5” increments. A decent starting point would be “M25 UL 1960TV 4x12 SM57 1.75in 0.0in SA73.wav” The speakers in this cabinet are the newer UK Greenbacks. Both the speakers and the cab have 2020 production dates. I read that the newer UK Greenbacks have a little less top end than the MIC Greenbacks, and it sounds that way to me. The upper speakers in the slant position sound quite a bit different than the bottom speakers. I will be using this cab as a load to train my mid-gain amps for both Full Rigs and DI captures. I also intend to provide a Part 2 to this set, but with non-SM57 microphones. More about the cabinet here: https://outmodedelectronics.blogspot.com/2025/10/marshall-1960tv-4x12-cabinet.html?m=1 I shot each microphone position through Chameleon Labs 7603 (Neve 1073-inspired), Stam SA-73 (Neve-inspired), and CAPI VP28 (API-based) microphone preamps for some variety. 24Bit 48kHz - 500ms - MPT Format Naming Convention M25 <speaker position> 1960TV 4x12 <mic> <Distance from Center> <Distance Off Grill> <Off Axis Angle, if applicable> <Microphone Preamp> Speaker Positions are LL – lower left, LR – lower right, UL – upper left, UR – upper right Equipment Used: -Shure SM57 -Behringer A800 Power Amp -Chameleon Labs 7603 Microphone Preamp -Stam SA-73 Microphone Preamp -CAPI VP28 Microphone Preamp -Steinberg UR824 Audio Interface -Voxengo Deconvolver 10sec sine sweeps were used to excite speaker