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Retro King Plexi 100
The Plexi 100 is a replica of the famed late 60's Marshall™ 100 watt head with solid state rectifier, four EL-34 power tubes, three 12AX7 pre-amp tubes, and Heyboer 100 watt plexi replica transformers. All hand wired point to point on a vintage style turret board, just like the originals, this is the monster that created legends.
Specs:
- 2 channels 4 inputs (high & low)
- Bright and normal channels
- 2 volume, treble, bass and presence
- 4 matched JJ EL34 power tubes
- 3 JJ 12AX7 pre-amp tubes
- 1 solid state rectifier
- Heyboer plexi transformers
- 4, 8 or 16ohm selector
- Two speaker outputs
- Plexi panels
- Original 100 watt plexi specs
- Dijon "mustard" caps
- Carbon comp resistors
- Steel chassis
- Hand wired point to point (Teflon wire)
- Baltic birch cabinet (Black Levant Tolex)
- 23"h x 32"w x 10-1/2"d
Warranty: 5 year limited (1 year speakers, 90 days tubes)
Price: $1,845
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RETRO KING AVAILABLE MOD OPTIONS:
Mercury Magnetics Plexi Output Tranny: available, inquire
Cathode Cap Mod: add $35.00
On the plexi and metal face amps up through 1972, there was a .68 cap on the second stage cathode circuit. It gave an increase in gain and midrange. Retro King 50 watts come stock with this cap but you can order this amp with a small switch (installed on the front panel) that takes this cap in and out of the circuit.
Mercury Magnetics Transformers: available, inquire
Gain Stage Mod: add $100.00
Retro King also offers their gain mod, which works like this: the input tube has two sides, channel one uses one half of the tube, channel two uses the other half. On the gain mod, one half of the tube drives the other half of the tube using the volume two pot as the gain control and the volume one pot as the volume control. This gives you a great amount of controllable gain. When you plug into the channel one input, it bypasses the extra gain stage and works like a stock plexi preamp. Both channels work with a master volume that is installed on the front or back of the amp. The master volume is included in the gain stage mod.
Tube-diode rectifier switch: add $49.00
Negative Feedback Control: add $35.00
Also available is the optional negative feedback control. In these amps the negative feedback resistor varied from 47k to 100k depending on the year. With the control (mounted on back of amp) you can adjust this from 47k to 100k. This will give you more or less power amp gain.
Master Volume Mod: add $50.00
Pre or post Pl master volume. Retro King installs these on the rear of the amp or in the front in an unused input jack hole.
SOZO caps upgrade: add $35.00
Adjustable line out: add $50.00
Zero Loss Effects loop with bypass switch: add $150.00
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Retro King 
