Microlynx Systems M0070 User Manual Download Page 2

M0070 Professional Preamp User Guide 1.0 

2  

©2009 Microlynx Systems Ltd. 

Features and Controls 

The M0070 is a full

featured preamp that has everything you need to manage your amplified sound.  

The following diagram shows the signal chain: 

10 M

1 M

0/180

deg

High
pass

Tone Control

Volume

Phase

Rumble

Bass Mid Treble

Out

In

Direct

Out

Lo-Z

Hi-Z

EQ

Post

Pre

Gain

 

The front panel has the most commonly used controls and adjustments.  It looks like 

Microlynx

M0070

Professional Preamp

Volume Phase Rumble

Bass

Mid

Treble

 

The rear panel has the input and outputs, as well as the controls that are less frequently used.  It looks 
like 

Out

GND

Lift

Phant

Power

In

EQ

Post

Pre

Lo-Z

Hi-Z

Direct

Out

 

The left side panel is visible when the preamp is mounted under the tailpiece.  It has the clipping and 
low battery LED as well as the gain setting potentiometer.  It looks like 

Clip

Bat

Gain

 

Summary of Contents for M0070

Page 1: ...iding a fairly strong output signal so why do you need a preamp There are two reasons performance and convenience Performance and sound quality Piezo transducers are sensitive to capacitive loading Since instrument cables have a capacitance of about 25 pF ft the longer the cable the more loading the transducer sees Increased loading negatively affects both the level of the signal and the frequency...

Page 2: ... Hi Z EQ Post Pre Gain The front panel has the most commonly used controls and adjustments It looks like Microlynx M0070 Professional Preamp Volume Phase Rumble Bass Mid Treble The rear panel has the input and outputs as well as the controls that are less frequently used It looks like Out GND Lift Phant Power In EQ Post Pre Lo Z Hi Z Direct Out The left side panel is visible when the preamp is mou...

Page 3: ... sub sonic signals The cut off frequency can be adjusted to suit the instrument and application Three Band Tone Control The M0070 has a high performance three band tone control circuit to cut or boost the low mid and high frequencies by up to 12 dB The cut off frequencies for each of the controls were carefully selected to be of most use for acoustic bass applications The tone control knobs have a...

Page 4: ...observe the correct polarity Slide the battery forward until it engages in the holder Replace the top cover with the serial number sticker at the bottom Carefully insert and tighten the screws Do not over tighten Installing the Preamp on your instrument For ease of use we strongly recommend mounting the preamp under the tailpiece of your instrument To protect your instrument and avoid rattling pla...

Page 5: ...arly noticeable It is typically worst when the two signals are at similar levels and is most noticeable at lower frequencies causing the sound to be thin The Phase switch reverses the phase of the amplified signal and can greatly mitigate the effect of this cancellation Be aware that the effect strongly depends on the location of the listener so what sounds good to you might be bad for the audienc...

Page 6: ...ges in the signal chain If phantom power is available the M0070 will automatically cut over to it eliminating drain to the battery The green LED will illuminate to indicate that the preamp is running off phantom power Note that if you are only using the Direct Out and no phantom power is available you will need to plug a patch chord into the phone output to enable the battery Using the Post Pre EQ...

Page 7: ...lanced Distortion at 1 kHz 0 03 at 14 dBu output level Residual noise level 25 µV C msg weighted Headroom At least 3 dB from when Clipping LED comes on Input gain tone controls flat 6 to 6 dB Frequency response 3 dB 10 Hz to 20 kHz tone controls flat Rumble Cut fully CW Rumble cut range 3 dB 10 Hz clockwise to 37 Hz counter clockwise Bass adjust range 12 dB shelving 6 dB at 70 Hz Mid adjust range ...

Page 8: ...is found not to be defective Microlynx retains the right to charge the buyer for testing expenses at Microlynx standard hourly rates in effect at that time This product contains no user serviceable parts This warranty shall be void if the product is opened This warranty does not cover damages or losses resulting from physical abuse neglect misuse shipping improper installation improper environment...

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