Amazon.com: JOYO Badass Bass Mini Amp Head 50 Watt Preamp Hybrid Tube Power Amplifier (No Sound, Requires Extra Speaker & Headphone) : Musical Instruments
Demeter VTBP-M-800D Bass Amp, Hand Wired (USA) with All Tube Preamp *In Stock! - Bass Central
Monoprice SB12 50-Watts All Tube 2-channel 1x12 Guitar Amp Combo with Spring Reverb, Clean and Overdrive Channels, Powerful - Stage Right Series - Walmart.com
Ashdown CTM-300 All Tube Bass Amp Head, 300W
EBS Classic T90 All Tube Bass Amp Head at Gear4music