1967 Marshall JMP-50 Model 1987 Plexi Lead Amplifier: Tube Rectified and Terrific !!
50:20
1968 Marshall Model 1986 JMP-50 Bass Amp in Beautiful Original Condition
1:17:00
1966 Marshall JTM-45 Mk II in for Repairs......A Rare and Wonderful Gem !!
1:16:33
The Effect of Output Tube Bias on Tone, Gain, and Headroom.....A Side-by-Side Comparison
32:47
74 Marshall 1959 Restoration. ELIMINATING MAINS HUM!!
47:54
1963 Magnatone Panaramic Model 1210 Amp with "True" Vibrato
15:20
Revealed : The Secret Tube Amp Power Reduction | Attenuator MOD
25:32
1966 Ampeg J12D Jet from Craigslist.....Junk or Gem ???
1:11:34