Frenzel Tube Amplifiers
www.frenzeltubeamps.com
2011 Copyright by Frenzel Tube Amplifiers. All rights reserved
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All designs, technical data, pictures, and information are
copyrighted and may not be reproduced without the permission of Frenzel Tube Amplifiers.
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4. TWO WATT POWER AMP - At the request of a lot of our customers, we have added a power amp as an
upgrade option. The power amp uses a 12AU7 as a Class A output stage which will deliver F and M crystal clear
cleans or great overdrive tones at 2 watts of power into an 8 ohm speaker. This allows you to use the FM-DP1 as
a low power practice amp as well as a preamp. With this option a speaker jack is added to the rear panel. Please
add $90.00 for this option.
5. JCM800 High Gain - Adds a third 12AX7 for three stages of high JCM800 style gain. Add $50.00
6. CUSTOM TOLEX HEAD CABS, SPEAKER CABS AND RACKMOUNT ENCLOSURES - Please see our CUSTOM
CABINETS page for complete details.
User’s Operation Guide:
FRONT PANEL CONTROLS:
F INPUT – input for F preamp.
M INPUT – input for M preamp.
F GAIN – sets the volume and the point at which overdrive distortion is produced by the M preamp. Set at ¼ for
initial setting.
PULL DEEP SWITCH ON F GAIN – When pulled enhances Bass and attenuates Treble. Affects both the F and M
channels.
M GAIN – sets the volume and the point at which overdrive distortion is produced by the BRIGHT preamp. Set at
¼ for initial setting.
PULL BRIGHT SWITCH - This switch enhances brightness at lower level settings of the M Gain control. As the
control is turned up, there will be less effect . At the max setting of the M control there is no effect.
MASTER – sets the maximum output of the preamp and the point at which the output tube saturates. The higher
the setting on the MASTER, the sooner the output tube will saturate and produce output tube overdrive
distortion. Set at ½ for initial setting. Use the GAIN to adjust the preamp overdrive. As the GAIN is increased the
preamp will begin to produce preamp overdrive distortion. Turn the MASTER up for output tube overdrive
distortion. By adjusting the settings on the GAIN and MASTER you can set your desired amount CLEAN and
OVERDRIVE tones.
TONE STACK – is a three band Bass, Middle, and Treble tone filter. The controls are interactive in shaping the
tone. You will need to experiment to find the best setting for your playing requirements. Initial settings for all
three controls is the ½ position
BASS – attenuates the Bass frequencies from 10hz – 100hz as it is turned down.
MIDDLE – is a 500 hz notch filter that dampens the middle frequencies. As you turn the control down it deepens
the notch.
TREBLE – attenuates the high frequency tones from 1000hz - 15000hz. As it is turned down, the MIDDLE control
will have less effect.
POWER SWITCH – turns power on. Pilot lamp will light up when switch is turned to ON (up) position.
REAR PANEL CONTROLS PREAMP ONLY:
OUTPUT JACK – Output of preamp. Low impedance designed to drive amps, mixer, effects, etc.
TRIM – controls the output level of the OUTPUT JACK to meet level requirements of the device your are driving
the preamp with. Set at MAX for initial setting. Then turn down to meet level requirements.
