Nilfisk MP8 User Manual

MP8

User's Manual

EIGHT CHANNELS MICROPHONE/

INSTRUMENT PREAMPLIFIER

ON

R

LTO

www.altoproaudio.com

Version 1.2 April 2006

English

SAFETY RELATED SYMBOLS

CAUTION

RISK OFELECTRIC SHOCK

DO NOTOPEN

This symbol, wherever used, alerts you to the pre­sence of un-insulated and dangerous voltages with­in the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.

This symbol, wherever used, alerts you to impo­rtant operating and maintenance instructions.
Please read.

Protective Ground Terminal

AC mains (Alternating Current)

Hazardous Live Terminal

ON: Denotes the product is turned on.

OFF: Denotes the product is turned off.

WARNING

Describes precautions that should be observed to
prevent the possibility of death or injury to the user.

Protective Ground

CAUTION

Describes precautions that should be observed to
prevent damage to the product.

PREFACE

PREFACE

Thank you for choosing MP8 Eight Channel Microphone/Instrument Pre-amplifier and thanks for choosing oneLTO
of the results of LTO AUDIO TEAM job and research.

For our LTO AUDIO TEAM, music and sound are more than a job...is first of all passion and let us say our obsession!
We have been designing professional audio products for a long time in cooperation with some of the major brands in
the world in the audio field.

The LTO line presents unparalleled analogue and digital products made by Musicians for Musicians in our R&D
centers in Italy, Netherlands, United Kingdom and Taiwan. The core of our digital audio products is a sophisticated
Software Team for the last 7 years.

Following this idea we create our products and we will create the new ones! From our side, we guarantee you and we
will guarantee you also in future the best quality, the best fruits of our continuous researches and the best prices.

Nothing else to add, but that we would like to thank all the people that made the MP8 Eight Channel Micro phone/
Instrument Pre-amplifier, and thank our designers and all the LTO staff, people who make possible the realization
of products containing our idea of music and sound and are ready to support you , our customers, in the best way,
conscious that you are our best richness.

Thank you very much

LTO AUDIO TEAM

2

2

TABLE OF CONTENTS

1. INTRODUC IONT ..................................................................................................................................................4

2. FEATURES...................................................................................................................................... ...................4

3. CONTROL ELEMENTS......................................................................................................................................4

4. INSTALLATION AND CONNECTION....................................................................................................................6

5. BLOCK DIAGRAM..............................................................................................................................................8

6. TECHNICAL SPECIFICATION.............................................................................................................................9

7. WARRANTY.........................................................................................................................................................10

3

1. INTRODUCTION

MP8 eight channels microphone/ instrument preamplifier has been designed and constructed using advanced technology
to provide its user crystalline audio reproduction for an infinite period of time, which is ideal for professional recording
applications and sound installs. These first 2 channels of our MP8 include high gain mic /line input with an integrated DI
box feature. The high-quality components and the carefully designed circuits ensure excellent audio performance
and an extremely linear frequency response, giving crystal-clear sound in the high range and an up-front, full-bodied
bottom end. This amplifier guarantees total reliability and a trouble-free use even in the most demanding conditions.
We believe the MP8 not only look great, but provide a perfect performance, what you get is unprecedented performance
at an incredibly attractive price.

2. FEATURES

Ultra-Wide Dynamic Range
Low-Noise Operating Levels
48V Phantom Power on Every Channel
Instrument Input on Channels One and Two
1/4" TRS Balanced Analog Outputs

3. CONTROL ELEMENTS

3.1 The Front Panel

5

3

20 0 CLIP

1

1

R

INSTRUMENT

LTO

ESOTAR

60dB

0

GAIN

1

1/4" Instrument Input (only channel 1 and channel 2 )

1

4

2

CLIP CLIP CLIP CLIP CLIP CLIP CLIP000000020 20 20 20 20 20 20

23

60dB

0

60dB

60dB

0

GAIN

0

GAIN

GAIN

45

60dB

0

GAIN

0

GAIN

6

60dB

60dB

0

GAIN

60dB

0

GAIN

7

48V 48V48V48V48V48V48V48V

8

60dB

0

GAIN

ON

POWER

6

7

These two 1/4" instrument inputs have been designed to connect instruments such as electric guitars or basses.

These instr

ument inputs are ultra high impedance amplifiers designed to allow the audio potential of an acoustic or

electric instrument pickup to be fully realized.

Note: please do not use the pre-amp of the instruments on-board (if possible), in order to avoid distortion caused

by over-driving input signal.

Input Gain Control Knob (from channel 1 to channel 8)

2

The knob can be used to adjust the gain of the input signal. The gain range can be varied from 0dB to +60dB.

Phantom Power Switch (from channel 1 to channel 8)

3

The unit provides +48V Phantom Power to every channel. Via this lighted switch, you can turn on /off the +48V
phantom Power for condenser microphone .

MP8

8CHANNEL

MICPRE-AMPLIFIER

Note: please do not connect dynamic microphone when the phantom Power is on. Otherwise, It may damage

device and the microphone.

High Pass Filter Switch (from channel 1 to channel 8)

4

The unit provides an 80Hz high pass filter for each channel. You will activate the filter by pressing the lighted
switch.

This filter is useful for eliminating extraneous low-end information from the signal being amplified. Frequencies from

eighty hertz and below are cut from the incoming signal. This feature is useful in eliminating low frequency noise

such as air-conditioning rumble or for reducing the sound of footsteps or other types of vibrations from being
transmitted through the microphone stand into the microphone. But, never press the switch when in music or bass
musical instrument application or the plump bass of music.

4

the

Input Level LED Indicator

5

These three LEDs will indicate the level of the input signal. When red LED flashes, it warns you that the level
of the input signal is too high and may cause distortion, please attenuate the level of the input signal.

.

6

Power LED Indicator

When the unit is powered on, the LED lights up.

Power Switch

7

It switches on/off MP8 main power.

3.2 The Rear Panel

jordat uttag nar den ansluts

Apparaten skall anslutas till

8

till ett natverk

8

AC Inlet

Useonly with a 250V fuse

AC INPUT

210-240V 50Hz
Rated Power
Consumption 20W

FUSE:

250V:T315mAL
REPLACE FUSE
WITH CORRECT
TYPE ONLY

LINE OUTPUT 1-8

9

CH.8

MIC. IN

CH.7

INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT

MIC. IN

11

10

CH.6

MIC. IN

CH.5

MIC. IN

CH.4

MIC. IN

CH.3

MIC. IN

CH.2

MIC. IN

MIC. IN

CH.1

PUSHPUSH

Standard IEC receptacle, connect your MP8 to mains with the supplied power cord. Before powering up your
MP8 for the first time, make certain the stated power requirement of the instrument matches the voltage supplied
in the country. Failure to do so could result in injury to the user and the probability of irreparable damage to the
unit is highly likely.

LINE OUTPUT 1-8

9

this direct output multi-pin connect is used to output the analog signal of 1-8 channels.

MIC Input

10

Each channel comes with input socket. There are balanced XLR sockets (from channel 3 to channel 8) and
combo sockets (channel 1 and channel 2). It provides ultra low noise and wide gain control allowing the MP8
user to boost desirable signal without increasing unwanted background noise. Phantom power is available to

each channel input of the MP8. When the phantom power switch is engaged, the +48v power is supplied for

condenser microphone.

Insert

11

The MP8 provides a stereo1/4" TRS socket for each channel. It can sent the analog signal out into signal path
via a TRS connector.

5

4: INSTALLATION AND CONNECTION

4.1 Mains Connection

Please ensure that the MP8 is set to the correct supply voltage before plugging the power cord into the wall outlet,
use the same fuse as marked on the fuse holder at the AC power connection. The mains connection of the MP8
is made by using the enclosed mains cord and a standard IEC receptacle. It meets all of the tional safetyinterna
certification requirements.

4.2 Audio Connection

The MP8 presents with balanced XLR & 1/4" TRS and combo connectors, and it can be interfaced by several

ways to support a variety of applications without any signal loss. The MP8 can be used on a single instrument
by connecting to a mixing console's main inserts, or on an entire mix "in-line" between a mixing console's outputs
and a power amplifier. Defective wiring may degrade the performer of MP8 so, please, use good quality screened
audio cables only. Please follow the guide below to interface MP8 without experiencing any noise or signaloss.

- Wiring Configuration

Either the 1/4" TRS phone jack or the XLR connector can be wired in balanced and unbalanced modes, which
will be determined by the actual application status, please wire your system as the following wiring examples:

For 1/4" Phone jack

+

Tip

Sleeve

TS Type Unbalanced

For XLR connector

Pin2 (+)

Pin3 (-)
(Linked to Pin1 manually, )

Pin1 ( )

XLR Type Unbalanced XLR Type alancedB

- XLR Connector Wiring For Phantom Power

PIN1 GND
PIN 2 +48v
PIN 3 +48v

+

+

-

Ring

TRS Type Balanced TRS Type Unbalanced

Tip

Sleeve

Ring

Pin3 (-)

Pin1 ( )

Tip

Sleeve

Pin2 (+)

6

For Direct Output Multi-pin Connector Wiring

Direct output

1 2

3 4 5 6 7 8 9 10 11 12

14 15 16 17 18 19 20 21 22 23 24 2625

Pin14 = CH1-H

Pin1 = CH1-C

Pin2=GND

Pin15 = CH2-H

Pin3 = CH2-C

Pin16 = GND

Pin17 = CH3-H

Pin4 = CH3-C

Pin5= GND

Pin18 = CH4-H

Pin6 = CH4-C

Pin19 = GND

Pin20 = CH5-H

Pin7 = CH5-C

Pin8=GND

Pin21 = CH6-H

Pin9 = CH6-C

Pin22 = GND

13

Pin23 = CH7-H

Pin10 = CH7-C

Pin11 = GND

Pin24 = CH8-H

Pin12 = CH8-C

Pin13 = GND

Pin25 = GND

-Insert Points Connection
If you are connecting to a mixing console's main inserts, you may have a single TRS jack for SEND & RETURN,
in this case, use an insert "Y" cable that configured like the examples below.

1/4" TRS insert

Ring

Send

Return

Tip

Sleeve

Insert Leads

TIPRING SLEEVE

TIPRING SLEEVE

TIPRING SLEEVE

SLEEVETIP

SLEEVE RINGTIP

3

3

Tip

Ring

Sleeve

1

2

21

Sleeve

Sleeve

Tip

Ring

Tip

Ring

Tip (Send)

Sleeve

Tip (Return)

Sleeve

1

2 (Send)

3

1

2 (Return)

3

Centre (Send)

Screen

Centre (Return)

Screen

4.3 Rack Mounting

The most secure mounting is on a universal rack shelf available from various rack manufactures or your music
dealer. The MP8 fits into one standard 19" rack unit of space.
Please allow at least an additional 4" depth for the connectors on the rear panel. Be sure that there is enough
air space around the unit for sufficient ventilation and please do not place the MP8 on high temperature
devices such as power amplifiers etc. to avoid overheating.

7

5. BLOCK DIAGRAM

8

6. TECHNICAL SPECIFICATION

INPUT

Connectors

Impedance

Max input level

CMRR

OUTPUT

Connectors

Impedance

Max output level

SYSTEM SPECIFICATIONS

Bandwidth

Frequency Response

Signa/Noise

THD

Crosstalk

Stereo Coupling

Six balanced XLR,Two 1/4"TRS Instrument Inputs and TWO

combo on Channel One and Tw

Balanced >50Kohm, Unbalanced>25Kohm

>+24dBu balanced and unbalanced

Typically>60dB at 1KHz

Eight 1/4" TRS (INSERT)

DIRECT OUT MULTI -PIN CONNECTOR WIRING

Unbalanced>60ohm

>+21dBu unbalanced

20HZ to 20kHz, +0/-0.5dB

10Hz to 200kHz,+0/-3dB

>128dBu, weighted, 22Hz to 22kHz

<0.007%

<-100dB, 22Hz to 22Khz

True RMS detection

FUNCTION SWITCHES

48 Volt Phantom Power

High pass filter

INDICATORS

INPUT LEVEL

Function switch

POWER SUPPLY

Mains Voltages

Fuse

Power consumption

Mains Connection

PHYSICAL

Dimension

Net Weight

Eight channel of the MP8 has 48V Phantom power available.

>80Hz

3 element LED display: -20/0/CLIP dB.

LED indicator for each

USA/Canada

U.K./Australia

Europe

General Export Model

100-120VAC : 400mA (SLOW-BLOW)

200-240VAC : 200mA (SLOW-BLOW)

30 Watts

Standard IEC receptacle

W(483.0)*D(288.0)*H(44.2) mm

3.3Kg

~120VAC, 60Hz

~240VAC, 50Hz

~230VAC, 50Hz

~100-120VAC,

~200-240VAC, 50-60Hz

9

7. WARRANTY

1. WARRANTY REGISTRATION CARD

To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within
10 days of the Purchase Date.

All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of
the sales status, so as to purport a more effective and efficient after-sales warranty service.

Please fill out all the information carefully and genuinely, miswriting or absence of this card will void your warranty
service.

2. RETURN NOTICE

2.1 In case of return for any warranty service, please make sure that the product is well packed in its original shipping
carton, and it can protect your unit from any other extra damage.

2.2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine, and give detail
information about your return address and contact telephone number.

2.3 A brief description of the defect will be appreciated.

2.4 Please prepay all the costs involved in the return shipping, handling and insurance.

3. TERMS AND CONDITIONS

3.1 warrants that this product will be free from any defects in materials and/or workmanship for a period

LTO

of 1 year from the purchase date if you have completed the Warranty Registration Card in time.

3.2 The warranty service is only available to the original consumer, who purchased this product directly from the
retail dealer, and it can not be transferred.

3.3 During the warranty service, may repair or replace this product at its own option at no charge to you for

LTO

parts or for labor in accordance with the right side of this limited warranty.

3.4 This warranty does not apply to the damages to this product that occurred as the following conditions:

Instead of operating in accordance with the user's manual thoroughly, any abuse or misuse of this product.

Normal tear and wear.

The product has been altered or modified in any way.

Damage which may have been caused either directly or indirectly by another product / force / etc.

Abnormal service or repairing by anyone other than the qualified personnel or technician.

And in such cases, all the expenses will be charged to the buyer.

3.5 In no event shall be liable for any incidental or consequential damages. Some states do not allow the exclu-

LTO

sion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you.

3.6 This warranty gives you the specific rights, and these rights are compatible with the state laws, you may also
have other statutory rights that may vary from state to state.

10

SE KAKU TECHNICAL GROUP LIMITEDI

No. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151 Taiwan

http://www.altoproaudio.com Tel: [phone]

email: [e-mail] Fax: [phone]

All rights reserved to ALTO. All features and content might be changed

without prior notice. Any photocopy, translation, or reproduction of part of this

manual without written permission is forbidden. Copyright 2006 SEIKAKU GROUP

c

NF02243-1.2