USERS MANUAL EBS MICROBASS 3

EBS MICROBASS 3

USERS MANUAL

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USERS MANUAL EBS MICROBASS 3

CHANNEL CONTROLS, SWITCHES & OUTPUTS

CLEAN CHANNEL = WHITE KNOBS

DRIVE CHANNEL = BLACK KNOBS

BOTH CHANNELS = GRAY KNOBS

BLEND sets the mix level between the clean channel and drive channel when the drive channel is active. To jump between the Clean and Drive channels, set this knob to the max position and set the Serial switch to Off .

MID is a peaking filter for the drive channel. The two knobs works in conjunction. Pick your frequency with the right control, and boost or cut with the left control in the chosen range.

LEVEL sets the output volume for the Drive channel.

MASTER controls the volume on the Output jack.

The balanced outputs (XLR) are not affected by the setting of this knob.

COMP. This control knob sets the compression ratio, i.e. The signal strength relation between the input and output; the higher the ratio the more compression. The

LED indicates when the compressor responds during play. It is a low noise compressor/ limiter that will tightening up the sound and prevent the preamp from saturating at peaks when approaching the headroom limit.

BASS is a 'shelving' type

12dB/oct slope phase compensated bass filter with a wide gain range.

BYPASS. This switch bypasses ALL filters in the clean channel and sets a flat frequency response.

MUTE FOOT SWITCH . Mutes the balanced outputs and the master output.

Fx Send is not affected by this function.

The Mute switch also enables the built-in tuner for silent tuning.*

* An internal switch can set the tuner to be active at all times.

MID. These two knobs works in conjunction. Use the right control to pick a frequency.

Use the left control to boost or cut the gain in the range of the chosen frequency.

Note: When the left control is set to Notch , you can use the right control to find and erase a precise frequency that causes unwanted feedback

(a common issue with upright basses in larger rooms).

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EBS MICROBASS 3 USERS MANUAL

REFERENCE GUIDE

GAIN selects between a low- and high-gain drive engine.

TONE shapes the tone range of the drive engine.

Flat setting when turned all the way up.

TYPE sets the drive tone character to THIN or

DEEP (neutral in the between position). The deep position compensates for low-frequency loss at very high gain.

DRIVE controls the amount of gain in the tube emulation stages (engines), and provides an extra gain all the way up to 40 dB. This control also compresses the sound when turning up level up to maximum, producing pure limitation.

GAIN adjusts the input signal level for the EBS

MicroBass 3. An optimum level is when the peak led starts flashing when playing hard on your instrument. A correctly set gain is vital for the signal processing to work properly.

TREBLE is a shelving type filter controlling the higher mids and treble registers, giving presence and ambiance to the sound.

CHARACTER FILTER

When active, bass and treble are boosted while the midrange gain will be slightly dropped, known as a smiley

EQ curve. This way the sound will be preshaped before the final adjustments using the other features of the preamp.

BRIGHT is an advanced high pass filter that produces a bright high-treble timbre, without adding any noise. This switch gives a gain of

10 dB at 10kHz.

DRIVE FOOT SWITCH - Engages the drive channel. The clean channel is always active, but if the BLEND control is turned all the way up, in parallel mode, this switch will make the sound jump from the clean channel to the drive channel when activated.

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USERS MANUAL EBS MICROBASS 3

A/B

C

D

FX SEND & RETURN. EBS MicroBass3 is provided with an effects loop for use with external units such as box or rack effects. The loop puts the external effects after both channels EQs and the channel selector (Drive footswitch).

STEREO MODE ON/OFF. By pushing this switch the return jack goes into

TRS operation for stereo mode. When active, the Balanced Outputs will turn into Left and Right outputs rather than post/pre. The stereo effect will also be heard through the headphones output. For the stereo effect, use an external effect with stereo output last in line, and connect to the FX return using a

Y-split cable, such as the EBS ICY-30.

OUTPUT. This is the master output jack to be connected to another amp or power amplifier.

A

B

C

D

E

F

G

E

F

C

DRIVE INPUT. This input is a direct input to the Drive channel in parallel mode and can be used to mix two sources, e.g. between two pickups on an instrument where applicable. Note: In conjunction with the Blend knob at max, and by choosing the LO gain engine (and modest or minimum Drive setting) it can serve as an input for a second instrument. Then you will use the drive channel to tweak the EQ individually for that instrument (not necessarily using any overdrive).

SERIAL ON/OFF. This switch controls from where the Drive channel should take its’ signal. In default mode, parallel, the source is taken from the main input or the Drive Input when used. In serial mode, the source is taken from the output of the Clean channel, so the channels are connected in serial.

INPUT - The main input is a low noise, high impedance instrument input. w w w . e b s s w e d e n . c o m

EBS MICROBASS 3 USERS MANUAL

K

J

I

H

L M

N

I

H

Note: The balanced outputs offers high-quality ’line box’ signals for connecting to PA mixing consoles or to studio or broadcast recording units, with high noise immunity. The output level controlled by the MASTER knob does not affect these outputs.

------------

POST BAL OUT. Post EQ signal that is taken immediately before the Master knob (serve as the Left channel output when using FX Return in ’stereo mode’).

L

M

J

J

PRE/POST BAL OUT. This output send various signals depending on which mode is selected:

1) When the switch is in its’ outer position the signal is taken before (PRE) any of the pedals the EQ.

2) When the switch is engaged this output normally serves as post Clean channel EQ only -output. However, if the ’stereo mode’ for the FX return is activated at the same time, it will serve as the Right channel output, post EQ.

N

K GND LIFT. Eliminates ground noise and hum. When required, press the

Gnd Lift switch to disconnect the ground from the balanced outputs.

AUX IN. Auxiliary input to be monitored only with headphones.

This input has no level control and the volume should be adjusted by the source.

PHONES. Connect your headphones here for silent practicing. The volume from the

MB3 is controlled by the MASTER knob where the Aux In needs to be adjusted from the signal source.

DC INPUT. Connect the power supply here, only 9V DC, 1000 mA

(supplied in package).

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USERS MANUAL EBS MICROBASS 3

TECHNICAL SPECIFICATIONS - MICRO BASS 3

Clean Channel:

Input Impedance:

Gain:

Character:

Bright:

Filter Section:

Bass Filter:

Mid Filter:

Treble Filter:

COMP/LIMIT:

Parallel mode

Serial mode

Gain Range

Gain Peak LED

Frequency Response +0/-3 dB 20-20.000 Hz

Filter Type

Gain:

Filter Type

Gain:

1.5 Mohms // 44 pF

10 Mohms // 22 pF min/max -oo/+30 dB

+10 dBv

Shelving High/Low Pass

Lo +6 dB @ 80 Hz

Mid -2 dB @ 900 Hz

Hi +3 dB @ 7.5 kHz

Shelving.

+10 dB @ 10 kHz

Type

Gain Range

Type

Freq Range

Q - Boost

Q - Cut

Gain Range

Type

Gain Range

Comp Gain

Attenuation

Compression Ratio

Attack

Release

12 dB/oct. Shelving.

+/- 18 dB @ 60 Hz

Bandpass Filter.

50 - 5.000 Hz.

0.5 - 1.3.

0.5 - >5.

+/- 12-15 dB

Shelving.

+/- 18 dB @ 8 kHz

0 dB max 24 dB max 3:1

(80%) typ <10 ms

(80%) typ 100 ms

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EBS MICROBASS 3 USERS MANUAL

Drive Channel:

Input Impedance:

Drive:

Drive Engines:

Lo:

Hi:

Type Switch:

Filter Section:

Tone Filter:

Mid Filter:

Common Features:

Effects Loop:

Phones Out:

Aux Input:

Output:

Balanced Outputs:

Auxiliary Info:

Power Requirements

Gain Range

Type

Type

Thin/Normal/Deep

Type

Frequency Range

Type

Frequency Range

Q

Gain Range

Dimensions (WxDxH):

Weight:

Specifications are subject to change without notice.

1.8 Mohms // 22 pF

40 dB

2nd harmonics soft

Symmetrical 2-stage with

+18 dB gain

Pre Drive EQ

6 dB/oct. Low Pass.

700 - 20k Hz

Bandpass Filter.

100 - 4.500 Hz.

1.2

+/- 15 dB

Loop Signal Level

Gain Unity

Output Impedance

Input Impedance nominal -10 dBv

(1:1)

<100 ohms

>200 kohms // 22 pF

Recommended Imp.

32 - 200 ohms

Input Impedance 20 kohms

-10 dBv Nominal Level

Output Impedance

Signal Level

Output Level

XLR Connections

Options

<1 kohms nominal 0 dBv nominal -20dBv

1-GND, 2-Hot, 3-Cold

Pre/Post EQ, L/R Ch. in stereo mode

Idle

Max max

450mA @9V.

750mA @9V

(with headphones at max output level)

168 x 124 x 53 mm /

6.6” x 4.9” x 2.1”

660 g ( 1.5 lbs.) w w w . e b s s w e d e n . c o m

USERS MANUAL EBS MICROBASS 3 w w w . e b s s w e d e n . c o m