The Bull Mastiff 40 watt amplifier has all of the tonal range of my smaller amplifiers, with much more headroom and very powerful bass. The bass is very clear and never muddy, while the highs have a nice sparkle to them that’s always lively and never overpowering. The tone controls still allow you to greatly dial back the bass and highs for a “lo-fi” sound.
The increased headroom and strong, clear bass with a dialed down treble allows authoritative jazz tones that weren’t possible on the smaller amplifiers. The sparkle in the highs make your guitar sing, whether it’s clean or crunchy or fuzz. The rectifier can be set to solid state for a bold attack, to full wave tube rectified for a touch of compression, and even half wave rectified for maximum sustain.
This amplifier also has what might be the first all-tube gated fuzz…you read that right! The fuzz pedal was built to emulate the tube sound…and now I’ve created a tube amp that emulates the transistor fuzz sound! It even replicates that ripping Velcro sound!
With 6L6s, the amplifier has greater headroom and stronger bass.
With 5881s, the sound is similar to 6L6s, but not quite as powerful.
With EL34s, the gain is increased and the midrange can be driven into a nice crunch.
Lastly, 6V6s give you a 6L6 sound with much less headroom, for a blues haven!
No adjustment/biasing needed to switch tube types! (Except for 6V6s)
This amplifier has the tonal range of 4 amplifiers, and it does this with only 4 knobs! (The 5th knob is a bonus knob for the all-tube gated fuzz effect).
Some of the highlights:
40 watts of power
6L6, 5881, EL34 or 6V6 power tubes
4 12AX7 pre-amp tubes
5U4 or solid state rectified
Signature sound inspired by the Pitbull
Still just 4 knobs (Gain, Bass, Treble, Volume)
4/8/16 ohm output
Tube count: 7
Transistor count: 0
JDP Amplifiers 