4x15 Vs 4x12 COMPARISON. 1972 Marshall 4x15 Speaker Cabinet Model 1979A Vs 1971 Marshall 4x12 Model 1960A using a 1977 Marshall JMP Super Bass. 2008 Gibson Les Paul 1959 Standard Reissue, with Custombucker in the bridge. Close mic Sennheiser MD421 U5, Room mic AKG C414BXLII Cardoid, 10 feet out. API 512c MIC PREAMP. Apogee Duet ADDA, iPad Cubasis.