ADA Ampulator

Technical data:
PUSH-PULL TUBE AMP & POWER EMULATOR SECTION:
DRIVE LEVEL: Increases the signal strength to the phase splitter of the power amp. CLEAN, COMPRESS and OVERDRIVE LED indicators: Show conditions of drive level to achieve the desired amount of tube distortion. PRESENCE: Negative feedback high frequency control to overcome high frequency loss during output saturation of tube power amps. TUBE MATCHING: Adjusts output tube bias of the push-pull output amplifier. HUM INJECTION: Induces A.C. hum into high level signals, simulating poorly filtered, "sagging" power supplies of older guitaramps. TUBE BIAS: Sets the class of operation for the tube power amp. CLASS INDICATOR: Displays class A. AB. or B as set by the Tube Bias control. POWER LEVEL: Sets power level emulation into various reactive speaker loads. Ranges from 0.2 to 200 watts. CHARACTER: Selects the two types of tubes. TRIODE or PENTODE, commonly used in power amps. A TRIODE is less efficient than a PENTODE and will tend to have a better damping factor, and a larger range of compression before actual signal clipping occurs.

MIKED CABINET EMULATOR SECTION:
CABINET BYPASS: Removes the cabinet emulation from the signal path. SPEAKER ARRAY: Selects the number of speakers in the cabinet. SPEAKER SIZE: Selects the speaker size, ei ther 10 or 12 inch. DRIVER: Selects either BRIGHT or DARK speaker frequency response characteristics simulating older (darker) or newer (brighter) cone designs. CABINET: Selects either OPEN or CLOSED back speaker cabinet design, effecting low fre quency behavior and also distortion character istics at loud signal levels.
LO RESONANCE: Allows the addition of a boost at low frequencies similar to the peak in many cardioid-type microphones when they are placed close to the sound source.
HI BALANCE: Sets the final rate and cutoff point of the high frequencies in the emulated speaker cabinet. Since this is also governed by mic axis, it can be viewed as a control of the microphone's angle ol placement to the cabinet. The +6dB setting would be fully on axis. The cutoff frequency ranges from 1 khz to 6khz with a final roll off of 18dB/octave.

OUTPUT SECTION:
OUTPUT LEVEL: Allows matching the level of the signal leaving the Ampulator to the level coming into it. OUTPUT CLIP LED: Lights when the Output Level control needs to be decreased. SYSTEM OUT/IN: Completely bypasses all tone modifying circuits and level
controls. When the button is out, the input signal appears at the Output jack.

REAR PANEL:
INPUT: The input jack will accept up to +20dBV balanced or unbalanced, connector. INPUT IMEDANCE: 50K ohm. MAXIMUM INPUT: +20bBV. OUTPUTS: Line level unbalanced via a 1/4" phone jack, and balanced via a separate line level (0dB) or mike level (-30 dB) switch selectable XLR connector. The max signal output Is +12dBm.The XLR connector has a pin 1 ground lift switch to eliminating some types of ground loops.
MAXIMUM OUTPUT: +19dBM. TUBE COMPLEMENT: one 12AX7A. FUSE: USA: 3/16 Amp, Sto-Blow. DIMENSIONS: 1 rack unit. D=5". W=19", H=1.75. WEIGHT: 5.6 Ibs.. 6.6 Ibs., shipping. POWER REQUIREMENTS: USA: 117VAC + 10%/- 15% 60 Hz. 20 watts maximum.