DRAWMER OPERATORS MANUAL. CONTENTS: SAFETY CONSIDERATIONS INTRODUCTION APPLICATIONS INSTALLATION AUDIO CONNECTIONS. Vacuum tube compressor, Operators manual • Read online or download PDF • Drawmer Electronics Mic-Pre/Tube Compressor User Manual. Download DRAWMER MIC PRE COMP SCH service manual & repair info for electronics experts.
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The side chain access points may be used to patch in equalisers to enable the compressor to act as a de-esser.
Passive equaliser control, which can be set to provide up to 15dB of bass boost at 40Hz. The Threshold range is continuously variable between infinity and dB, the theory nanual that signals below the threshold are essentially unprocessed and the signals exceeding this threshold are subjected to increasing amounts of gain reduction dependent on by how much they exceed the threshold.
DRAWMER 1960 Operator’s Manual
Strictly speaking, a soft knee manuual does not have a rigidly defined threshold but the title ‘Threshold’ has been retained for the “amount of compression” control for the sake of familiarity. The unit should always be connected to the mains supply earth using this cable. The VU meters may be switched to monitor either the amount of gain reduction taking place or the output signal level and the two channels may be used either independently or as a stereo pair, depending on the setting of the stereo link switch.
Attack simply offers a choice of slow, medium and fast whilst release has six settings. This stage may be deliberately overdriven if required to add tonal coloration to an instrument, and with the addition of an external speaker simulator, overdriven guitar sounds may be Directly Injected “DI’d” 19600 the mixing console.
Passive equaliser control, which can be drawer to provide up to 18dB of treble boost at 16kHz.
The actual attack time is further modified by the release setting chosen. A two position high or low gain switch provides an additional 10dB of gain when required for level matching or for creating overdrive effects.
Soft-knee compressors are generally preferable for unobtrusive level control and the system used in the provides firm control without the side-effects of a fixed, hard-knee design. The use of compression on complete mixes can cause a dulling of the sound but the ‘s tube circuitry combined with the soft-knee action helps maintain the vrawmer and transparency of transient sounds. Use the Output 19600 control to restore any level lost due to compression.
Drawmer Electronics 1960 Mic-Pre/Tube Compressor User Manual
Equalization is provided along with sufficient gain to overload the tube pre-amp for sustain effects. In addition to the balanced microphone and line inputs on the rear of the unit an auxiliary input on the front panel gives direct access for guitars or electronic instruments. Two sets of insert points on the rear panel allow additional effects to be added either before or during compression.
manuual Because the compression system is based on the Soft Knee principle, the onset of compression is progressive, so no Ratio control is necessary. The passive Bass and Treble controls are based on those used in classic tube guitar amplifiers while the Bright switch puts a peak in the frequency response at around 2kHz to simulate the voicing of a typical guitar amplifier.
By increasing the Gain control setting, the input stage can be made to overdrive in a manner similar to that of traditional valve guitar amplifiers. The fully conforms to the EMC standards, if you propose to use the unit where it maybe exposed to high levels of disturbance such as found close to a TV or radio transmitter we suggest that the screen of the signal cable is connected to the chassis connection on the XLR type connector.
In Normal mode, the signal is passed through the compressor. For mono use, each channel may be considered as being completely independent and set up accordingly. Avoid running at excessively high output levels as this reduces the available amount of signal headroom and could lead to distortion in extreme cases.
Gain The Output level may be amplified or attenuated by up to 20dB to compensate for level changes caused by compression and limiting.
Drawmer – Manual
Switchable Attack and Release settings are provided along with a fully variable Threshold, two of the Release settings being programme dependent. It incorporates the same type of passive equalisation circuitry used in traditional tube guitar amps, while the Bright switch emulates the voicing of a typical guitar amplifier.
The mic inputs provide up to 60dB of gain while maintaining a noise figure comparable with the better ‘in-desk’ mic preamps. Three switchable Attack settings are provided giving Fast, Medium and Slow attack times.
Combining eight active tube stages and the low noise and reliability of solid state electronics, the Drawmer provides the ultimate direct interface between the sound source and the recording medium. There is little doubt in the minds of many engineers and producers that drawner tubes possess a unique sound quality providing a “warmer, more alive” sound.
The tube gain stages are versatile enough to provide a clean, punchy sound or the gain may be increased to provide the type of overdrive sound associated with tube guitar amplifiers. The two auto release switch settings continually optimise the compressor action to suit the dynamics of the material being processed, setting 5 being optimised for percussive material and setting 6 for general purpose use.
The intended use of the audio insert jacks would be to patch in EQ egreverb or similar processing. For your own safety it is important that you use this cable.
A further auxiliary drwwmer pre-amp with EQ is also provided. Avoid mounting the unit directly above power amplifiers or power supplies that radiate significant amounts of heat and always connect the mains earth to the unit.
In general, a maximum gain reduction of between 10dB and 15dB will be adequate.
The Aux input may also be used for processing the output from a dedicated guitar preamplifier, where the EQ can be used to further tailor the sound before it is compressed.