Overview:

 

The FRENZEL  "Princeton Plexi 964"   is the newest version of our Mini Guitar amp series. It was "INSPIRED" by the  50's Fender Princeton...but it is a much more than a clone.  It has two separate preamp channels, one voiced like  the Fender Princeton Blackface  and one voiced like the Marshall Plexi.  The F and M channels have separate input jacks and gain controls which allows you to use an AB/Y switch to select one channel for Clean and one for Lead or  to combine the channels together for your own unique tones.  The voices are contoured by a modified Fender  style three band tone stack accentuated with a modified Presence control which has an "Edge" boost pull-switch to control the negative feedback for dynamic soaring leads. We also  added a Master control which allows you to control and shape the preamp and output stage overdrive tones.  A classic  vibe tremolo oscillator modulates the bias on the output stage  which uses   a pair of  push-pull 6V6's that produce the warm blues and jazz tones that made the  Princeton one of Eric Clapton's favorite amps. For those that prefer the Marshall rock tones, we  added a EL34/6V6 bias switch that allows you to use EL34's in place of the 6V6's. The  output transformer is a heavy duty  extended range type with 4-8-16 ohm outputs designed to produce with crystal clarity all the high, mid, bass tones...plus the harmonics that your instrument creates.  When playing clean, this amp will faithfully reproduce what you put into it...and when you stomp on it...it  will produce tones you have never heard before!  It works great with guitar, mandolin, bass, organ, piano, harp and strings. 

Standard Features:

• Normal (Type F) Bright (Type M) inputs with separate preamps and Gain controls for the unique smooth Fender Princeton Blackface warm tones or the Marshall Plexi great high mid-tones....or you can use an AB-Y switch and create your own distinct tones.

• Classic  Fender  style 3-BAND TONE STACK for extended flexibility in shaping your tone.

• Master level control so you can crank the GAIN's up and overdrive the preamp without overdriving the output tubes.

• Presence control  - used to adjust the high-frequency response and damping factor of the power amp section.

• Unique NNFB "Edge" boost switch on the PRESENCE control that transforms the power amp section into a No-Negative-FeedBack style amp for soaring dynamic leads. 

• Bright Pull-Switch on F and M Gains

•  Deep Pull-Switch on Bass

• Classic Bias Modulated Vibe Tremolo with foot pedal control.

• Line Out - post output transformer LINE OUT with LINE OUT LEVEL control for recording or driving a power amp, Auto switched internal load to simulate speaker if speaker is  not plugged in. Inject great tone directly into the PA system with the Speaker Simulated Direct Interface.

• Custom heavy duty output transformer for extended low frequency performance with 4 - 8 - 16 ohm outputs selectable by a rotary switch.

• Ultra fast heavy duty high voltage solid-state rectifiers provide sharp pick attack and dynamic bass.

• Standby Switch - Protects tubes from cathode stripping during warm-up. 

• Tube Complement: comes standard with 4 - 12AX7,  2 - 6V6, but you can substitute 12AT7's or 12AU7's in the preamp and driver for different tones and overdrive sounds. 

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• Electrical Specifications: 

• Input Power  120 VAC 50-60Hz - 155 Watts Standard IEC plug-in three prong grounded power cord. (230 - 240VAC available. See Upgrade Options) 

• Output Tubes - Class AB Push-Pull 6V6's - Fixed Bias

• Output Power  -  15 watts

• Speaker Output Impedance - selected by switch 4-8-16 ohms.

• Line Out Impedance - 1K ohms

• Instrument Input Impedance - 1 Megohm

Physical Data: 

• Open Chassis Dimensions - 12" Wide x 8" Deep x 2" High. (Add 6" clearance for tubes)

• Weight - 15 lbs. 

• Chassis - Heavy gauge aluminum with welded corners.

• Retro Vintage Cage Mini Head  - heavy duty lightweight steel mesh cage provides protection and excellent ventilation for tubes. Comes with easy carry Fender style strap handle. Overall Dimensions - 12" Wide x 10" Deep x 10" High 

• Rock solid point-to-point hand wiring with military style tie-wrapped wiring harnesses for long life and reliability.

• DC on filaments to eliminate 60 hz hum.

• Star ground system to eliminate induced current chassis noise.

• Input and Output Jacks isolated from chassis for low noise, eddy currents, and hum.

• Components - Only the highest quality parts are used including heavy duty transformers, low noise tubular polypropylenes capacitors, metal film resistors, Micalex sockets, Neutrik jacks. All parts are rated for commercial high use conditions. Wherever possible we use parts made in the USA.

• Front Panel Controls - F Input Jack, M Input Jack, F Gain, M Gain, Bass, Middle, Treble, Presence/Edge Boost Switch, Pilot Lamp, On-Standby-Off Power Switch

• Rear Panel Controls -  Power Cord Connector, Fuse,  Vibe Pedal Jack, Line Out Level, Line Out Jack, Speaker Output Jack, Speaker 4-8-16 Impedance Selector Switch 

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