Marshall Amplification DBS 7200 7200 Bedienungsanleitung

DBS 7200

7200 Head,

72115 &72410

Combos

Handbook

Marshall Amplification plc

Denbigh Road, Bletchley, Milton Keynes, MK1 1DQ, England

Tel: (01908) 375411

Fax: (01908) 376118

Web Site - http://www.marshallamps.com

Whilst the information contained herein is correct at the time of publication,

due to our policy of constant improvement and development, Marshall

Amplification plc reserve the right to alter specifications without prior notice.

Jan ‘99

WARNING!

PLEASE READ THE FOLLOWING LIST CAREFULLY.

A. ALWAYS Ensure that a good quality mains plug conforming to the latest BSI standards is

fitted-(UK only).

B. ALWAYS wire the plug in accordance with the colour code attached to the mains lead (UK

only).

C. DO NOT attempt to remove the amplifier chassis. There are no user serviceable parts inside.

D. ALWAYS have this equipment serviced or repaired by competent, qualified personnel.

E. NEVER under any circumstances, operate the amplifier without an earth.

F. NEVER use any amplifier in damp or wet conditions.

G. ALWAYS ensure that the impedance of the speaker or speakers connected does not fall

below the amplifiers minimum impedance rating.

H. NEVER obstruct the ventilation grills.

I. ALWAYS use correct type of speaker leads when using extension cabinets.

J. PLEASE READ this instruction manual carefully before switching on.

Constant exposure to the high sound pressure levels of which this amplification system is capable could

result in permanent damage to your hearing.

Although individuals will vary in their susceptibility to noise induced hearing loss,

almost everyone will have their hearing impaired if exposed to intense sound levels for a

sufficient length of time.

To prevent the occurrence of permanent hearing loss, it is advisable to wear ear plugs or

protectors if you are going to be exposed to high noise levels for prolonged periods.

Introduction

The Marshall Dynamic Bass System was carefully designed using innovative new circuitry to provide you

with a combination of superb sensitivity and excellent control plus incredible levels of dynamic power to project

and respond to the full range of contemporary bass sounds.

Superb sensitivity comes from the fully blendable mixture of a valve or solid state input pre-amp. The solid-

state section offers fast, percussive attack, as favoured by many modern players, whilst the single ECC83 valve

provides the smooth warmth and more compressed classic tone exclusive only to valve technology.

Excellent control is derived from comprehensive EQ and compression facilities including primary EQ, where

Low and Hi rotary tone controls combine with deep and bright switches to give amazing depth and clarity to

your basic sound. More precise tone shaping or the ability to set up a completely contrasting sound, is available

from the switchable 7 band graphic EQ, which has been tailored to cut and boost those frequencies that are

fundamental to dynamic bass performance. The built in compressor provides further control and features

industry standard technology for smooth operation and the highest performance quality.

Knowing how important headroom and clean power are to accurate, powerful bass reproduction led our

designers to engineer a system with headroom that goes far beyond the normal limits. Whereas a conventional

bass amplifier has an RMS to peak power ratio of 1:2, the Marshall Dynamic Bass System dramatically

increases this ratio to 1:10, giving you five times more headroom than an ordinary bass amplifier.

The result is a no compromise bass system with an RMS rating of 200 watts capable of delivering peaks of

2000 watts. This ensures that the system has the energy to respond accurately to even the widest dynamic range.

In sound terms this extended headroom provides incredible clarity and punch to give you the most responsive,

rewarding bass amplification system that you've ever played through.

Using the Dynamic Bass System.

Make all the external connections such as Speaker Outputs (18), the Send (20) and Return (21) to

and from your effects processor, the output to your guitar tuner and connection to the footswitch for

the Graphic EQ (23) if required.

Select the correct input to match your bass.

Models 7200, 72115 & 72410

Front Panel Functions.

1. Hi-sensitivity Input

Input for the connection of bass guitars with

lower output levels.

2. Lo-sensitivity Input

Input for the connection of bass guitars with

higher output levels.

3. Gain Control with Peak LED

Controls the level of input gain.

For optimum signal level the peak LED should

light occasionally.

4. Pre-Amp Blend Control

This control fully anti-clockwise routes the signal

through purely solid state input pre-amp circuitry.

Turned fully clockwise the signal is routed through

an ECC83 pre-amp valve circuit. The various

positions in between offer numerous combinations

of the brighter more percussive solid-state tone with

that of warmer more compressed valve tone.

5. Deep Switch

Push switch to add extra bottom to the low end of

the primary EQ.

6. Low Primary EQ Control

Rotary control that gives + or - 15dB cut and

boost of the lower end of the primary EQ.

7. Bright Switch

Push switch to add brightness and attack to the

top end of the primary EQ.

8. High Primary EQ Control

Rotary control that gives + or - 15dB cut or boost

of the primary EQ upper frequencies.

9. Graphic Equaliser

7 Band graphic equaliser offering + or - 15dB cut

or boost (centre flat) of the frequencies that proved

to be the most effective for bass reproduction in our

exhaustive listening tests.

10. Graphic On/Off Switch and

Indicator

Push switch to access or by-pass the graphic with

LED indicating on/off status. (The graphic is also

footswitchable by any standard on/off footswitch).

For the footswitch to function the front panel

switch must be in the ‘Off’ position.

11. Compression Depth Control

Rotary control for selecting the depth of

compression. Note: This control works in

conjunction with input Gain control (3).

The input Gain control should be used to set the

threshold level and the Depth control to select the

amount of compression.

12. Compression Threshold Indicator

LED which indicates when the compression

threshold is reached.

Generally speaking the Low-Sensitivity input (2) suits bass guitars of high output levels e.g. active

basses and the High Sensitivity input (1) suits lower output instruments (passive basses). As there are so

many different output levels from the many types of instrument available to you, you should try both

before making the decision.

Set the Primary EQ to flat and make sure that the Deep (5), Bright (7), Compression (13) and Graphic

EQ switches (10) and the Master Volume control (14) are all off.

By turning the Gain control (3) until the peak LED lights occasionally you will be setting the

optimum level of input gain. Too little means that the amp is working inefficiently, too much can cause

unwanted distortion.

The Gain control (3) may need to be backed off accordingly if you boost the EQ, especially in the

lower frequencies.

Note: (Even with the gain control off you will still get a sound through the speakers on turning up the

Master Volume).

Turn up the Master Volume to the desired level and set-up your basic sound using the Primary EQ

controls (6&8) combined with the Deep and Bright switches (5 & 7). The character of the sound can be

changed using the pre-amp Blend control (4) from the brighter more percussive solid state tone to the

warmer more compressed vintage valve tone.

When using the built in Compressor the compression threshold is set using the Gain control (3) and

the amount of compression by the Depth control (11).

The clean power of the D.B.S is so dynamic that you may not need any further EQ although any

amount of fine tuning of tone can take place using the 7 band Graphic Equaliser. Alternatively you can

set-up an entirely different sound on the graphic then use the footswitch to switch between the two. This

incredible clarity also means that you won’t have to compromise your EQ settings as the volume

increases , as is often the case with normal bass amplification.

The Cabinet Range

Using the design skills and production techniques developed at Marshall Amplification over thirty two years,

we have produced two cabinets which are perfectly suited to the new 7200 Dynamic Bass amplifier which can be

used singly or together.

Both cabinets use the highest grade birch ply and are ported and braced to exactly complement the specially

designed, heavy duty loudspeaker units.

Model 7041 4x10 with horn (400 watts RMS -8 Ohms).

The 4x10 with horn can handle a massive 400w RMS for compatibility with the 7200 or any other bass

amplifier with standard quarter inch jack speaker connections

For added versatility and to allow you to tune the 7041 to suit your style and sound, we have included an

infinitley variable horn to boost high end frequencies.

This cabinet delivers excellent full range response if used by itself or can form part of a stack system if used

in conjunction with another 7041 or the perfectly matched 7015.

Dimensions: Width 606mm x Height 606mm x Depth 370mm.

Model 7015 1x15 (200 watts RMS -8 Ohms).

The compact 7015 gives an impressively full tonal response accross the whole bass frequency range -making

it the ideal portable partner for the 7200 or as part of a Marshall bass stack in conjunction with the 7041. This

cabinet is rated at 200 watts and features a specially selected heavy duty 15" speaker.

Dimensions: Width 606mm x Height 606mm x Depth 370mm.

13. Compression On/Off Push Switch

Push switch which activates the compression

circuit.

14. Volume Control

Rotary control to set the overall output level of

the amplifier.

15. D.I. Pre or Post EQ Selection

Switch

Selection switch to offer a studio or PA engineer

with the choice of direct signal either before or

after EQ and compression has been added.

16. Power Switch

On\ Off mains power switch with LED indicator

and featuring soft start circuitry to minimise switch

on and switch off noise.

Models 7200, 72115 & 72410

Rear Panel Functions.

17. Mains Input Connector

For connection to mains power supply.

18. Twin Speaker Outputs

For connection to loudspeakers. The minimum

total load is 4 Ohms.

-72115

As the impedence of the internal 15" speaker is 8

Ohms, the connection of an extension cabinet (8

Ohms only) is possible.

-72410

As the impedence of the internal speakers is 4

Ohms, it is NOT possible to connect an extension

speaker.

19.Tuner Output Jack

Instrument level buffered output for direct

connection to an electronic tuner.

20. Effects Send Jack

Jack socket to connect to the input of an external

effects processor.

21. Effects Return Jack

Jack socket to accept the output from an external

effects processor. Note: (The output level of the

effects loop is nominally centred around + 4 dB

which makes it compatible with most rack effects

processors).

22. Line Output Jack

Jack socket ideal for connection to home

recording equipment.

23. Graphic Footswitch Jack

Jack socket for the connection of a single

On/Off footswitch for the Graphic EQ.

24. Balanced D.I. Output

For direct connection to recording or PA mixing

desks and switchable pre or post EQ (15).

25. D.I. Level Selection Switch

Selects 0dB or -20dB D.I. output levels for

maximum interfacing flexibility.

26. Earth Lift Switch.

For the elimination of earth loops when

connecting to other earthed equipment.

Please Note:

Models 72115, 72410 are fitted with castor cups, castors

can be ordered directly from Marshall Amplification plc.

Please use stock code: ‘CSN’ when placing your order.

SYSTEM

DYNAMIC

EQUALIZATION

PRE-AMP

BLEND COMPRESSIONINPUTS POWER

GAIN VOLUME

LO HI

LOHI

BRIGHT GRAPHIC DEPTH

DEEP

PEAK

80 160 320 640 1250 2500 5000

+15dB

-15dB

+15dB

-15dB

S V -15 +15 -15 +15

. . . . . . . . . . D.I.

PRE

POST

S-SOLID STATE

V-VALVE

SYSTEM

DYNAMIC

DYNAMIC BASS SYSTEM

LINE

OUTPUT

EFFECTS

RETURN

EFFECTS

SEND

MAINS INPUT

230v -50 Hz

500 VA

TUNER OUT

GRAPHIC

FOOTSWITCH

BALANCED D.I.

OUT

EARTH

LIFT

D.I.

LEVEL

WARNING!

No user serviceable parts inside;

refer servicing to qualified personnel only.

AVIS!

Risque de choc. Ne pas ouvrir.

WARNING!

Fire & Shock Hazard: Do not expose this

unit to rain or moisture. This Apparatus Must Be Earthed.

Do not open.

Manufactured in Great Britain by:

Marshall Amplification plc, Bletchley, Milton Keynes.

SPEAKER OUTPUTS

(200 Watts RMS)

(Minimum Load 4 Ohms)

Front Panel.

Rear Panel.

17.

2. 3.

10.

11.

12.

13.

14.

15.

16.

18. 23. 24. 25. 26.

19. 20. 21. 22.

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