Ashdown ABM Руководство пользователя - Страница 5

Просмотреть онлайн или скачать pdf Руководство пользователя для Усилитель Ashdown ABM. Ashdown ABM 18 страниц. Bass magnifiers abm, mag & electric blue
Также для Ashdown ABM: Руководство по эксплуатации (6 страниц), Руководство по эксплуатации (9 страниц), Руководство пользователя (9 страниц)

Печатать страницу

Front Panel

INPUT

A single input jack socket is Provided for your instrument. This is a high impedance input designed to perfectly match the

impedance of the pick-ups on a passive bass. It also has sufficient headroom available to allow active basses to be used. Use

the input gain control to adjust for the sensitivity of your instrument.

INPUT CONTROL

The input control sets the signal level through the preamp in conjunction with the input level vu meter. This is adjusted to give a reading of 0vu on the

meter for average playing dynamics with occasional peaks into the red region. Please note that the setting of this may have to be re-adjusted after

modification of the E.Q. controls.

SHAPE

With this button in a fixed E.Q. is superimposed on the pre-amp to give a bass and treble boost to the sound. This gives +8db at 50hz and This gives

+10db at 10khz.

E.Q.

This button switches the equalisation section in or out i.e. the Bass, Middle and Treble controls and the two rotary controls placed between these.

EQUALISATION

This consists of bass, middle and treble controls with two more rotary controls placed in-between. This can be used in a number of ways:

Firstly as a very simple bass, middle and treble tone control section as found on older traditional amplifiers. This is done by leaving the 340hz and

1.6Khz controls set in their centre positions and using only the bass, middle and treble controls to alter the overall tone.

Secondly, if more control is required then the 340hz and 1.6Khz controls can also be used to tailor the E.Q. In the regions between the main tone

controls.

This provides a very versatile equalisation section, it is simple to understand and operate, yet provides a wide degree of variation. It retains the

simplicity of a three control tone section but provides the flexibility of a graphic equaliser.

COMPRESSION

Adding a small amount of compression gives a fat bottom end to the sound and allows a greater volume of amplification to be used without the

playing peaks distorting the amplifiers output stage.

You will also find that this will add definition to your playing bringing out notes within a run more clearly as it evens out the dynamics of your playing. A

large amount of compression can be used as an effect but it will tend to reduce the dynamics in your playing to such an extent that the volume of the

note will be the same no matter how hard or soft you hit the string.

Compression also adds sustain to notes making them longer before they die away.

The compression level control adjusts the degree of compression applied to the bass signal. For this to function correctly the input level must be

correctly set as described in the input control section above.

When the input level is correctly set there will be hardly any difference in volume between compression in and compression out. This is because

the MAG automatically compensates for the reduction in level that would be apparent when compression is added by increasing the overall gain to

restore the volume to its pre compression level, because of this you may notice an increase in background noise with high compression settings.

Compression is switched in/out with the push button adjacent to the compression level control.

SUB HARMONICS

This section produces sub harmonics an octave below the notes being played. The level of these sub harmonics relative to the straight bass sound

can be adjusted using the level control.

This is very effective in thickening the sound and you will find in use that only a small degree of this lower octave is required to really fill out the sound

and provide a character that is not possible by any other means.

The degree of sub harmonics is also dependant on the setting of the bass control.

www.ashdownmusic.com

USER MANUAL

MAG ROOTMOASTER

DIRECT INjECT ( D.I. )

A balanced D.I. Is provided on the front panel XLR socket. This provides a post E.Q. Post effects signal.

The output signal from this XLR socket is set to a level and impedance suitable for connecting directly into a balanced microphone input of a mixing

desk for either direct injection into the pa system or for recording.

EFFECTS SEND/RETURN

A serial effects loop is provided at a level of 0db. The effects send and return sockets for this are on the front panel below the D.I. Socket.

The effects send socket can also be used as a line out socket if required. The signal path through the preamp is only broken when a jack plug is

inserted into the effects return socket. The effects send is situated after the E.Q.

TUNER/LINE OUT

This output socket provides a line level signal that can be used either for a permanent connection to a tuner or a line output for connection to other

power amplifiers and speakers.

OUTPUT LEVEL

The output control adjusts the overall level of the amplifier. Adjust this for your preferred overall stage playing volume.

Everything possible has been done to make these reliable, minimum service, high quality, long lasting powerful bass amplifiers.

We know you will appreciate the effort that has been put into the design and manufacture of this unit and you will be rewarded in your choice of bass

amplifier by long life and reliability.

INPUTS

High Input

Impedance - 3.9M ohms

Input range 150mv to 20v p - p

Low Input

Impedance - 10k ohms

Input range 300mv to 40v p - p

Effects Return

Impedance - 22k ohms

Input level 0dbu nominal

OUTPUTS

Tuner Output

Impedance - 10k ohms

Level 0dbu nominal

Effects Send

Impedance - 22k ohms

Level 0dbu nominal

D.I.Output

600 ohms balanced

Level -20dbu nominal

Speaker Outputs

Minimum Impedance - 4 ohms

Frequency Response

-3db at 22hz and 25khz

EQUALISATION

Bass

+/- 15db @ 100hz

Lo Mid

+/- 15db @ 340hz

Middle

+/- 15db @ 660hz

Hi Mid

+/- 15db @ 1.6Khz

Treble

+/- 15db @ 7khz shelving

Deep

+ 8db @ 50hz

Bright

+ 10db @ 10khz

Signal to Noise

Better than 80db (E.Q. Flat)

Distortion

Less than 0.5% THD

Output Power

220watts RMS into 4 ohms.