My go to for massive these days is the Sonic Farm 2DI4. Pentode mode is the definition of massive.
It does look interesting.
Once again...no dimensions:
TECHNICAL SPECIFICATIONS:
1 channel
Design concept: (tube) pentode hybrid preamp
2 tube modes: triode and pentode
Frequency response: 10Hz-50kHz +/-3dB
Maximum gain: 54dB at the line output, 32dB at the DI (mic level) output
Harmonic distortion: <2% before clipping level, quickly decreases if driven less.
Maximum line output level: 30dBu
Minimum output load: 600Ohms
Connectors: XLR DI and line output, balanced only
Instrument input: 1/4" unbalanced, mono
Input impedance: 2.2MOhm
Amp: 1/4" unbalanced, mono, buffered
Power consumption: 15W
Operating voltage: 110-120VAC or 220-240VAC, switchable
All supply voltages regulated.
285V Plate voltage for huge headroom
Gold plated printed circuit boards with a double copper layer.
Gold plated tube socket
We give a one year warranty on parts and labor.