EBS Reidmar 752 Bass Guitar Amplifier Head User Manual

EBS Reidmar 752 Bass Guitar Amplifier Head

About the EBS Reidmar 752 Bass Head!

The EBS Reidmar 752 provides a full-bodied, warm and transparent tone throughout the entire range. It is equipped with EBS renowned built-in compressor, professionally balanced XLR output, Character filter and an efficient 4-Band EQ and a Drive that lets you master the sound. The EBS Reidmar 752 handles a 2 Ohm load. Choose cabinets wisely to match the output of the amp (750W RMS @ 2 Ω / 450W @ 4 Ω / 230W @ 8 Ω). A rule of thumb is to use cabinets that handle the amp’s output at the cabinet load. Example: A 4-ohm cabinet should handle at least 450W RMS to match the Reidmar 752. 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 counterclockwise 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 752s 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 2 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.
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 push button 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 that works on the highest frequencies of the bass to give enhanced ambiance and presence.
14. Proceed to the DRIVE control and increase this setting gradually until the 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.

BLOCK DIAGRAM

FRONT PANEL FEATURES

INPUT
A low noise, high impedance instrument input that will interface with passive and active instruments perfectly.

CHARACTER FILTER
The EBS Reidmar 752 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.

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.

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.

FILTER ACTIVE
This switch activates the filter section described under point 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 non-peaking result using frequency-dependent gain. In addition, at the minimum setting, this filter facilitates a notch function, suitable for cutting an exact frequency or eliminating acoustic coupling.

TREBLE is a shelving-type filter controlling the higher mids and treble registers, giving presence and ambiance to the sound. BRIGHT is an advanced high pass filter capable of producing bright high treble timbre, without adding practically any noise.

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.

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

PILOT LAMP
Indicates power on condition.

Note: These features can be switched on and off 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.

Midrange filters

REAR PANEL FEATURES

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 input of the amplifier.

4. LINE OUT -This is a full range output that will drive multiple power amps, extending the power of the system. The signal present at this output is taken after the volume control.

5. REMOTES – The EBS Reidmar 752 is equipped with two remote jacks for controlling with foot switches the character, filter active switches, the drive section, plus a mute function. You may use any standard footswitch pedal making a connection to the 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 the 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 minimum total impedance is not lower than 2 ohms.
   Warning: Lower impedance than 2 ohms may cause permanent damage to the amp. EBS will not take responsibility for eventual hearing damages caused by the powerful EBS Reidmar 752.
   WARNING! DUE TO THE HIGH OUTPUT OF THE REIDMAR 752, BE CAREFUL NOT TO DAMAGE SPEAKER CABINETS BY EXCEEDING THEIR RATINGS!

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! IMPORTA NT!

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 an MP3 player or similar to the Reidmar 752. Since this input does not have any level of 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. The 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 the fuse if needed only with the same type and value.

13. POWER -Switches the amp on or off.

SPECIFICATION

450 W RMS

230 W RMS

 | Minimum Load|  | 2 ohms
 | Protection|  | Over-current, thermal and high frequency (HF).
AUXILIARY INFO:| Power Requirements|  | max 850 W
 | Mains Protection:|  | T5A Fuse (230V) T10A Fuse (100/120V)
 | Dimensions (WxDxH)| max| 36.3 x 26.2 x 7.6 cm (14.3 x 10.3 x 3.0”)
 | Weight| net| 3.8 kg ( 8.31 lbs)

Specifications are subject to change without notice! EBS REIDMAR 752 – PROFESSIONAL BASS HEAD.

DESIGNED AND DEVELOPED BY EBS SWEDEN AB• GRINDSTUVÄGEN 44-46, SE-16733 BROMMA,SWEDEN PHONE +46 87350010, FAX:+4687350005 • E-MAIL: info@ebssweden.com WEB: www.ebssweden.com.

References

• EBS PROFESSIONAL BASS EQUIPMENT - EBS Professional Bass Equipment Since 1988

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