Big Bear Audio MP1 Manuale utente

MP1 and MP1+ User Manual

Signal Flow

In Use

The MP1 has been designed to be as malleable as possible during your session. The balanced inputs

can accept both mic and line levels, this means that you can be as creative as you like with the

Colour modules. By driving the Colour slightly you will achieve low a THD harmonic content, adding

subtle tones and compressions. By driving the Colour modules hard and then attenuating the output

you can really push the modules into harder saturation. And of course you can achieve everything in

between these two states.

Mic Line

The Input Gain control applies to Mic, Line and DI input. On the MP1 this ranges from +5dB to +65dB

on a continuous potentiometer. On the MP1+ the Elma Switch has 21 positions in gradual steps from

0dB to +60dB.

Instrument Input

The Instrument Input TRS on the front of the module has an active impedance topology, this

essentially means that the input impedance is almost infinite. The benefits of this topology mean

that the user can record with anything up to a piezo mic (for a double bass for example) however if

left unconnected to an instrument may cause considerable unwanted noise in your system.

Changing Colour Modules

Before removing the MP1 make sure all power has been turned off to your 500 series rack. To pull

out the MP1 hold on to the gain knob and pull gently on the unit. To change a Colour module first it

is advisable to ground yourself on something, some ground connected metal in your studio for

example, this will prevent any damage caused to sensitive parts that may be present in the modules.

To remove the modules tuck your fingers underneath either end of the module and lightly pull the

module out. To replace a module line up with header pins and the feet with the sockets in on the

MP1 and slightly push down on the module until you hear a click.

When first engaging the Colour switch on the MP1 there may be a small amount of DC present, it is a

good idea to engage a new Colour module with your master fader down just in case a DC spike

makes its way to your monitors.

VU Meter

The VU meter, although very accurate is intended for a visual guide. We have created a meter which

lies somewhere between peak and average, this will allow the user to accurately monitor levels and

also determine if there are serious transient clipping on your recording.

Noise

The MP1 has been engineered to have the lowest noise possible for an electronic input mic pre.

However the power supply makes a huge difference not only to the noise floor but the sound of the

MP1. The noise floor remains at -128dB EIN with any available commercial 500 series power supply,

there will however be issues with very cheap switch mode power supplies; The very poorly made

500 series power supplies will have SMPSs that create demonstrable harmonics in the audio band,

which are significantly audible when using any mic preamplifier. We strongly recommend linear

power supplies over switch mode, for many reasons not just including noise - please do get in touch

if you have any queries about this.

We fully appreciate that not all customers can afford linear 500 series power supplies, this generally

should not be an issue as the switching frequency noise is only present in the audio band of the

poorer supplies (5KHz-9KHz) when only 1-2 modules are loaded in the supply. This is due to the

switching frequency automatically moving higher as move current is drawn.

For more information on this we have written a blog post on this subject which you may find helpful.

Due to the MP1’s thicker than usual front panel it is supplied with both Metric M3 and Imperial 4-40

extra long mounting screws, please make sure you select the right type for your power supply.

MP1 Specification

Gain: 66dB

Mic and Line Input Impedance: 4.8K

Instrument Input Impedance: >2M

THD Mic/Line: 0.001%

THD Instrument: 0.04%

Frequency Response: 10Hz - 80KHz +/- 0.1dB @0dB Gain

Equivalent Input Noise: Better than -128dB

Signal to Noise Ration: Better than -95dB

MP1+ Specification

Gain: 60dB

Mic and Line Input Impedance: 4.8K

Instrument Input Impedance: >2M

THD Mic/Line: 0.01%

THD Instrument: 0.04%

Frequency Response: 20Hz - 50KHz +/- 0.5dB @0dB Gain

Equivalent Input Noise: Better than -128dB

Signal to Noise Ration: Better than -100dB

Product Warranty

Big Bear Audio warrants this product to be free from defects in materials and workmanship for a

period of one (1) year from date of purchase, and agrees to remedy any defect identified within such

one year period by, at our option, repairing or replacing the product.

This warranty, and any other express or implied warranty, does not apply to any product which has

been improperly installed, subjected to usage for which the product was not designed, misused or

abused, damaged during shipping, damaged by any dry cell battery, or which has been altered or

modified in any way. This warranty is extended to the original end user purchaser only. A purchase

receipt or other satisfactory proof of date of original purchase is required before any warranty

service will be performed.

THIS EXPRESS, LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, TO

THE EXTENT ALLOWED UNDER APPLICABLE LAW. IN NO EVENT SHALL Big Bear Audio BE LIABLE FOR

ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THIS

PRODUCT.

Some countries do not allow the exclusion or limitation of consequential damages or limitations on

how long an implied warranty lasts, so this exclusion may not apply to you.

Warranty

If you suspect a defect in this product, please call us at +44 (0)208 245 4248 or email us at

[email protected] to discuss the suggested defect (it is possible that a suspected defect

could be due to improper usage) and to obtain a returns number. It shall be your responsibility to

pay for shipping the product to us, and, if the product is determined to be defective, our

responsibility to pay for shipping the product back to you.

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