Ebs Reidmar 750 User Manual

EBS REIDMAR 750

USERS MANUAL

REIDMAR 750

PROFESSIONAL BASS HEAD

CONTENTS Page

Introduction 2

Block Diagram 3

Front Panel Controls 4

Rear Panel Features 6

Specifications 8

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USERS MANUAL

EBS REIDMAR 750

About the EBS Reidmar 750 Bass Head!

The EBS Reidmar 750 provides a full bodied,
warm and transparent tone throughout
the entire range. It is equipped with EBS
renowned built in compressor, professional
balanced XLR-output, Character filter and an
efficient 4-Band EQ and a Drive that lets you
master the sound.

The EBS Reidmar 750 handles a 4 Ohm load.
Due to its power rating (700W RMS), using
mini-size cabinets calls for very careful use of
the master Volume. It is strongly recommended
to use Reidmar 750 with a 4 ohm cabinet that
matches the power output of the amp.

The Reidmar amp is designed and developed
in the heart of Sweden by EBS.

GETTING STARTED...

1. Carefully unpack the bass head.

2. Check that all knobs are set fully counter
clockwise besides the EQ controls marked
BASS, MIDDLE and TREBLE which should be
set to mid position. Make also sure all push
switches are set to their outer positions. Now
the EBS Reidmar 750s settings are "zeroed"
and ready to be personalized.

3. Connect one or more speaker cabinets
to the speaker output. Make sure the total
impedance is not below 4 ohms.

4. Turn on the POWER switch.

5. Plug in your bass. While plucking the
strings as hard as you would during your
hardest playing, gradually increase the
GAIN knob unit the peak LED starts to flash
at peaks.

6. Move over to the VOLUME knob and
adjust for the desired output volume.

BUILDING THE SOUND...

7. The first tonal shaping circuitry is the
Character Filter next to the GAIN control.
This filters provides a preshape EQ prior of
further fine tuning of your sound.

8. Enable the filters by pressing the Filter
Active pushbutton and explore the filter
section. Play your bass. Note that there
isn't any difference in sound yet.

9. The filters are basically of the boost/cut
design. This means that the level controls
marked with + and -signs, either boost or
cuts the selected frequency band. Further,
the MIDDLE section has got a frequency
control for precise adjustment of the midrange.

10. Gradually increase or decrease the level
and vary the frequency of the middle filter
when operating the middle filter. Notice how
the sound is effected. An A/B comparison can
be made by toggling the filter active switch.

11. Proceed to the COMP/LIMIT knob. This
control adjusts the compression and is useful
when playing very dynamic or loud.

12. Turn up the COMP/LIMIT knob to mid
and max position. Notice how the peaks in
volume will straighten out as you play harder
and harder.

13. Now, go on to the BRIGHT and turn it
half way up. Play your bass. The BRIGHT
filter is a high pass filter which works on
the highest fre quencies of the bass to give
enhanced ambiance and presence.

14. Proceed to the DRIVE control and increase
this setting gradually until desired level of over
driven sound is reached.

This was a brief introduction and as you go
on further in this manual, you will learn how
to use and utilize all of the useful features
that the EBS Reidmar offers you.

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EBS REIDMAR 750

FILTER SECTION

EBS REIDMAR 750 – BLOCK DIAGRAM

BASS

LINE OUT

USERS MANUAL

SPKR

OUT

A

POWER

AMPLIFIER

MIDDLE TREBLE

FILTER

PRESHAPE

peak

INPUT GAIN

BUFFER

BRIGHT

Remote

Remote

FILTER

comp

ACTIVE

COMPRESSOR

/ LIMITER

post

DRIVE STAGE

Character

A

pre

DRIVER

VOLUME

A

SEND

RETURN

EFFECTS

Remote

AUX IN HEADPHONES

LOOP

(-10 dBv)

INPUT

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OUTPUT

BALANCED

on/off

GND

USERS MANUAL

EBS REIDMAR 750 – FRONT PANEL CONTROLS

EBS REIDMAR 750

1

2 5

1. INPUT -A low noise, high impedance

instrument input that will interface with
passive and active instruments perfectly.

2. CHARACTER FILTER* -The EBS Reidmar

750 provides a preshape filter, Character,
which operate independently from the other
preamp functions. This gives the user the
opportunity to preshape the sound before
the final processing with the other features
of the preamp. When on, boost is achieved
in bass and treble ranges respectively, while
the midrange has a slight drop in gain.

Character filter ON

3. GAIN -Control to adjust the instruments’

signal strength to the right operating level in
the EBS Reidmar. For optimum basic signal
level, turn up the GAIN knob until the PEAK
led starts flashing from the strongest signal
from the instrument.

Note: A correctly set GAIN is vital for the signal
processing to work properly in the EBS Reidmar.

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63 4 7 8 9

4. COMP/LIMIT -A low noise compressor

limiter that works fast and effectively,
tightening up the sound and preventing
the bass head from saturating at peaks
when approaching the headroom limit. A
string may be plucked very hard and fast,
without any greater difference in level or
side effects. The COMP/LIMIT knob sets the
compression ratio, i.e. The signal strength
relation between the input and output; the
higher ratio the more compression. The LED
intensity dynamically indicates the amount
of compression during play.

5. FILTERACTIVE* – This switch actives the filter

section described under point 6.

6. FILTERS -The filter section contains four

enhanced performance filters:

BASS is a ’shelving’ type 12dB/oct slope
phase compensated bass filter with a wide
gain range.

MIDDLE has an extended frequency range
of 100-6000 Hz. This filter facilitates
total control over the mids, with a wide
bandwidth giving a natural and non­peaking result using frequency dependent
gain. In addition, at minimum setting this
filter facilitates a notch function, suitable for
cutting an exact frequency or eliminating
acoustic coupling.

EBS REIDMAR 750

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

BRIGHT is an advanced high pass filter
capable of producing bright high treble
timbre, without adding practically any noise.

7. DRIVE* - The DRIVE knob controls the

amount of gain in the tube emulation stage,
and provides an extra gain all the way up to
34 dB. The gain is compensated over this
section producing a warm overdrive while
the output remains more or less constant.
This control also compresses the sound
when turning up level up to maximum,
producing pure limitation. This Drive
function can be controlled by a footswitch
remotely. See rear panel descriptions for
more details.

8. VOLUME -The VOLUME knob controls

all volume in the unit, controlling the
poweramp and LINE output. The balanced
output (XLR) is not affected by the setting of
this knob.

USERS MANUAL

Midrange filters

Treble filter

9. PILOT LAMP -Indicates power on condition.

* Note: These features can be switched on and of f

with a footswitch (EBS RM-4, sold separately). The
footswitch can be connected from the back of the amp
and also features a Mute switch.

Bass filter

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Bright filter

USERS MANUAL

EBS REIDMAR 750 – REAR PANEL FEATURES

EBS REIDMAR 750

10

9111213

1

3678

245

1. BALANCED OUTPUT -A balanced output

functions as a high quality line box for
connecting to PA mixing consoles or to
studio or broadcast recording units, with
high noise immunity. The volume level does
not effect this output.

2. GND LIFT SWITCH -Lifting ground is a great

aid in many occasions eliminating ground
noise and hum. When required, set this
switch to Lift position to disconnect the
ground from the balanced output.

3. PRE/POST EQ SWITCH -The switch selects the

signal source. In the inner position this
switch selects the overall sound included
settings on the EQ, otherwise, in the lower
position an uncolored sound is taken
immediately after the amplifiers input.

4. LINE OUT -This is a fullrange output that will

drive multiple poweramps, extending the
power of the system. The signal present at
this output is taken after the volume control.

5. REMOTES – The EBS Reidmar 750 is

equipped with two remote jacks for
controlling with foot switches the character,
filter active switches, drive section, plus a
mute function. You may use any standard
footswitch pedal making connection to
ground for each of the remote functions.
Refer to the rear panel screen print and
technical specification for further info.

Note: Each of the filter switches on the front panel
needs to be set to inner position in order to be remotely
controlled.

6. SPEAKER OUTPUT – Connect your speakers

here. Care should be taken when
connecting speakers so that the minium
total impedance is not lower than 4 ohms.

Warning: Lower impedance than 4 ohms may cause
permanent damage to the amp. EBS will not take
responsibility for eventual hearing damages caused by
the power ful EBS Reidmar 750.

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EBS REIDMAR 750

WARNING! DUE TO THE HIGH OUTPUT OF
THE REIDMAR 750, BE CAREFUL NOT TO
DAMAGE SPEAKER CABINETS BY EXCEEDING
THEIR RATINGS!

USERS MANUAL

7. SYSTEM FAN – The amps performance is

maintained among other techniques with a
fan controlling the temperature of the unit.
Make sure not to cover the ventilation
openings of the amp! IMPORTANT!

8. MAINS SELECTOR SWITCH -Selects the

operating mains voltage. Unplug the amp
before selecting the mains voltage!

9. AUX IN - This input will accept a stereo or

mono 3.5mm plug and gives you the option
of mixing in an external source such as
MP3 player or similar to the Reidmar 750.
Since this input does not have any level
control, be sure to control the volume from
the source. Both channels will be mixed in
from this input. The signal at this input will
not be present at the balanced output.

10. PHONES - 1/4” stereo contact to connect

a pair of standard headphones.

11. EFFECTS LOOP – This is a serial effects loop

for the use of external units such as box or
rack effects. Nominal level is set for use
with standard stomp boxes.
The loop puts the external effects after the

filter, compressor and drive sections.

12. MAINS – Connect only to the indicated

mains AC voltage and replace fuse if
needed only with same type and value.

13. POWER -Switches the amp on or off.

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USERS MANUAL

INPUT: Input Impedance 1 Mohms // 100 pF
GAIN: Gain Range min/max -oo/ +30 dB

CHARACTER: Filter: Typ e Shelving High/Low Pass

COMP/LIMIT: Compressor Gain 0 dB

FILTER SECTION: Bass Filter: Typ e 12 dB/oct. Shelving

DRIVE SECTION: Gain Range m in/m ax 0 / 34 dB

BALANCED OUTPUT: Output Level Nominal -10 dBv

EFFECT LOOP: Loop Signal Level nominal -10 dBv

LINE OUT: Output Impedance 100 ohms

PHONES OUT: Impedance recommended 32 -200 ohms
AUX INPUT: Input Impedance 5 kohms

REMOTES: Connection: REMOTE JACK: RING = Mute

POWER A MP: Output Power @4 ohms 700 W RMS

AUXILIARY INFO: Power Requirements max 850 W

Specifications are subject to change without notice!

EBS REIDMAR 750 - PROFESSIO NAL BASS HEAD

DESIGNED AND DEVELOPED BY EBS SWEDEN AB• GRINDSTUVÄGEN 44-46, SE-16733 BROMM A,SWEDEN
PHONE [phone], FAX:[phone] • E-MAIL: [e-mail] WEB: ww w.ebssweden.com

Gain Peak LED +10 dBv
Frequency Response +0 / -3 dB 20 -20.00 0 Hz

Gain: Low +7 dB @ 40 Hz

Attenuation max 24 dB
Compression Ratio max 3 :1
Attack (80%) typ. <10 ms
Release (80%) typ. 100 ms

Middle Filter: Typ e Bandpass Filter

Treble Filter: Typ e Shelving

Bright: Typ e Shelving

Low End Compensation (Boost off ) < 350 Hz

Frequency Response +0/-3 dB 10-20.000 Hz
XLR Connections 1-GND, 2-Hot, 3-Cold
Options GND Lift, Pre/Post EQ

Gain Unity (1:1)
Output Impedance 100 ohms
Input Impedance >50 kohms // 100 pF

Signal Level nominal 0 dBv

Nominal Level -10 dB v

Function: Connect to GND for bypass.
Threshold: 0.7 V
Current : 5 mA suitable for LED

Minimum Recommended
Load Impedance
Protection Over current, thermal and high frequency (HF).

Mains Protection: T5A Fuse (230V) T10A Fuse (100/120V)
Dimensions (WxDxH) max 38.5 x 26.5 x 7.5 cm (15.2 x 10.4 x 3.0”)
Weight net 3.7 kg ( 8.2 lbs)

Mid -2dB@ 800Hz
High +3 dB @ 10 kHz

Gain Range +/-18dB @ 60Hz

Frequency Range 100 -6.000 Hz
Q -Boost 0.7 -1.1
Q -Cut 0.8 ->10
Gain Range +/-12-15 d B

Gain Range +/-18dB@6kHz

Gain Range +15/-0 dB @ 10 kHz

TIP = Drive

FILTER JACK: RING = Filter Section

TIP = Character

4 ohms

EBS REIDMAR 750

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