Pierson Amplifiers - Tweed and Custom Guitar Amps

The Rose Amplifier


Rose Amp      
Carl Verheyen and the Rose amplifier    



  • Model #: 5LP
  • 20 Watts
  • Class A
  • Cathode Biased

Hand Wiring

  • Each Rose amp is hand wired on high grade epoxy turret board insuring durability, stability and road worthiness
  • solid cloth covered wire like the original (as opposed to stranded plastic coated wire) -- a must for a vintage, sweet tone
  • Outstanding wiring techniques for a neat and clean look, less hum and less noise


Dimensions: 16" (H) x 20" (W) x 9 1/2" (D)

  • Finger jointed solid pine
  • Strong, durable
  • Great natural resonance
  • Tolex


  • High grade Stainless Steel screws
  • High grade Stainless Steel aircraft locking nuts for less vibration
  • Industrial quality glass filled tube sockets, no rattling noise like NOS style counterparts. Tubes can be inserted and removed thousand of times
  • All grounds are done with 18 gauge stranded wire, translating in LESS HUM, LESS NOISE


  • High quality Carbon composition, important ones are usually NOS Allen Bradley or Riken Ohm (Made in Japan) high precision, gold plated copper leads.
  • Each resistor individually measured before wiring to insure exacting tolerances
  • Low noise
  • High temperature tolerance
  • Extreme reliability
  • Warm sound


  • High quality paper in oil or Solen Fast (made in France) coupling & decoupling caps
  • Sprague Electrolytic Sprague or  CDE (made in USA) for filtering caps
  • highest quality and durability
  • Key ingredient to the vintage tone - modern polypropylene film caps sound too bright
  • All caps are formed slowly with a variac for stability and less noise

Power Transformers (by Mercury Magnetics in California)

  • Highest quality transformers made by Mercury Magnetics
  • Hand wound, paper interleaved
  • Period correct voltages -- no cold, harsh, high plate voltages
  • Center tapped filament -- no heater hum
  • Available in 220V / 240 V / 100 V

Output Transformers (by Mercury Magnetics in California)

  • Highest quality transformers made by Mercury Magnetics
  • Manufactured using the actual Triad engineering data
  • Hand wound, paper interleaved on paper bobbins
  • High efficiency
  • Rich harmonics - astounding tone
  • Built to last forever
  • Tremendous bottom end, shimmering highs, a lot of headroom


  • Every component (resistor, capacitor, pots, etc.) is tested before installation
  • Every soldered connection is tested
  • Voltage checkpoints are verified throughout the circuit
  • I test every amplifier for a substantial amount of time (sometimes it's hard to stop playing...) and listen for potential rattling, vibrations sweeping frequencies with an audio signal generator.


  • Celestion AlNiCo Blue standard


Output: (2) 6V6GT

Preamp: (2) 12AX7

Rectifier: (1) 5Y3GT   


The Rose Amp 20 watts (1x12" combo)


US Shipping Included
Options: Speakers, Capacitors, tubes, external cabinets, International Voltage

If you have any questions, do not hesitate to contact me at


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