Bbe sound 262 User Manual

MODEL 262 SONIC MAXIMIZER
USER MANUAL

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IMPORTANT SAFEGUARDS

For your protection, please read these safety instructions completely before operating the appliance, and keep this manual for future reference.
Carefully observe all warnings, precautions and instructions on the appliance described in the operating instruction supplied with the appliance.

i - BBE 262 INSTALLATION INSTRUCTIONS

INSTALLATION

•Water and Moisture - Do not install the appliance near water: for

example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet
basement, or near a swimming pool.

•Heat - Do not install the appliance near sources of heat such as
radiators, heat registers, stoves, or other appliances that produce heat.

•Ventilation- Situate the product so its location or position does not
interfere with its proper ventilation. For example, you should not
place the product on a bed, sofa, rug, or similar surface that might
block the vent openings, or placed in a built-in installation, such as a
bookcase or cabinet that might impede the flow of air through the
ventilation openings.

•Wall or Ceiling Mounting - If your appliance can be mounted to a
wall or ceiling, mount it only as recommended.

USE

•Power Source - Connect the appliance to a power supply only of the

type described in the operating instructions or as marked on the
appliance.

•Power-Cord Protection - Route the power cord so that it is not like­ly to be walked on or pinched by having objects placed on it, paying
particular attention to the plugs, receptacles, and the point where the
cord exits from the appliance.

•Grounding or Polarization - Do not defeat the grounding or
polarization feature of the AC power cord. If your AC receptacle will
not accept the power cord plug, contact your electrician to install a
proper AC receptacle.

•When not in use - Unplug the power cord of the appliance from the
outlet when left unused for a long period of time. To disconnect the
cord, pull it out by grasping the plug. Never pull the plug out by the
cord.

•AC Receptacle - Check to make sure that the AC receptacle holds
the power cord plug firmly and securely. If the power cord plug is
loose, contact your electrician to replace the defective and unsafe AC

•Foreign Objects - Be careful that foreign objects and liquids do not
enter the enclosure through openings.

SERVICE

Unplug the appliance from the wall outlet and consult qualified
service personnel when:

• the power cord or the plug has been damaged.

• a solid object or liquid has fallen into the cabinet.

• the appliance has been exposed to rain or moisture.

• the appliance does not appear to operate normally or exhibits a
marked change in performance.

• the appliance has been dropped, or the enclosure damaged.

Do not attempt to service the appliance beyond that described in the
operating instructions. For all other servicing, refer to qualified
service personnel only.

To prevent fire or shock hazard, do not expose the unit to rain or moisture.
ATTENTION: RISQUE DE CHOC ELECTRIC-NE PAS OUVRIR.

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert
the user to the presence of uninsulated ‘dangerous voltage’ within the product’s enclosure
that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point, within an equilateral triangle is intended to alert the user to the
presence of important operating and maintenance (servicing) instructions in the literature
accompanying the appliance.

TABLE OF CONTENTS

Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i

Product Description . . . . . . . . . . . . . . . . . . . . . . . . .2

Controls/Connections . . . . . . . . . . . . . . . . . . . . . . . .3

General Operation/Applications . . . . . . . . . . . . . . . .5

Service/Warranty Information . . . . . . . . . . . . . . . . . .14

Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . .18

Congratulations on your purchase of the BBE 262 Sonic
Maximizer, an extremely versatile, two channel signal processor
that will benefit any sound reproduction system. Program
material will have sparkle and unmistakable clarity. Lower
frequencies, such as a bass guitar, will be more evident in the
mix. Voices will be crystal clear. Guitar and keyboard notes
will have greater integrity and be more distinct from each other.
If classical music is your forte, listen to your favorite symphony
and feel as though you are the conductor. Rap music will take
on new dimensions with a thunderous, yet tight thump which
cannot be achieved with any other sound processor. The BBE
262’s flexible design will allow it to be configured into any
system. Whether live sound reproduction or in recording
studios, the BBE 262 will be a welcome addition.

The following features will make the BBE 262 attractive to
sound engineers, players, and listeners:

1. Independent PROCESS and LO CONTOUR control for each
channel to accommodate mono or stereo configurations.

2. AFUNCTION switch to allow for the comparison of the BBE
processed signal to the unprocessed signal.

3. AFOOTSWITCH input mono jack for easy connection to any
mono shorting footswitch.

4. Quarter inch PHONE jacks to allow for easy, unbalanced
configuration into any sound system.

IMPORTANT

Before you begin, please check the contents within this box to
insure that included are:

1. The BBE 262 Sonic Maximizer.

2. 12 volt AC adaptor.

3. Four (4) Rubber Feet for ‘Table Mount’ applications.

4. The BBE 262 User’s Manual.

If any of these items are found to be damaged or missing,
immediately contact the BBE dealer from whom the unit
was purchased. Before you begin, please read this manual. It will
help you use the BBE 262 more effectively and answer most of the
common questions that our service department receives. But if you
still have questions, please call our service department
at [phone].

BBE 262 INSTALLATION INSTRUCTIONS - 1

BBE 262 SONIC MAXIMIZER
The BBE Process - ‘What It Is’

Loudspeakers have difficulty dealing with the electronic signals
supplied by an amplifier. These difficulties cause such major phase and
amplitude distortion that the sound reproduced by a speaker differs
significantly from the sound produced by the original source.

In the past, these problems proved unsolvable and were thus
delegated to a position of secondary importance in audio system design.
However, phase and amplitude integrity is essential to accurate sound
reproduction. Research shows that the information which the listener
translates into the recognizable characteristics of a live performance are
intimately tied into complex time and amplitude relationships between
the fundamental and harmonic components of a given musical note or
sound. These relationships define a sound’s “sound”.

When these complex relationships pass through a speaker, the proper
order is lost. The higher frequencies are delayed. A lower frequency
may reach the listener’s ear first or perhaps simultaneously with that of
a higher frequency. In some cases, the components may be so

time-shifted that they reach the listener’s ear ahead of some or all of

the harmonic components.

This change in the phase and amplitude relationship on the harmonic
and fundamental frequencies is technically called ‘envelope distortion.’
The listener perceives this loss of sound integrity in the reproduced
sound as ‘muddy’ and ‘smeared.’ In the extreme, it can become diffi­cult to tell the difference between musical instruments, for example, an
oboe and a clarinet.

BBE Sound, Inc. conducted extensive studies of numerous speaker
systems over a ten year period. With this knowledge, it became

possible to identify the characteristics of an ideal speaker and to distill
the corrections necessary to return the fundamental and harmonic
frequency structures to their correct order. While there are differences
among various speaker designs in the
magnitude of their correction, the overall pattern of correction needed is
remarkably consistent.

The BBE process is so unique that 42 patents have been awarded by

the U.S. Patent Office.

The BBE Process - ‘How It Works’

The BBE Process imparts a pre-determined phase correction to the
high frequencies where most harmonic information exists. This is done
by breaking the signal into three sub-bands or groups: a.) LOs (20Hz ­150Hz), b.) MIDs (150Hz - 1200Hz), and c.) HIGHs (1200Hz - 20kHz).

The low group is delayed about 2.5 ms (milliseconds) via a delay
within the passive low pass filter. The front panel LO
CONTOUR control allows for either a flat response or a boost at 50Hz.

The mid-range group is delayed only about 0.5ms and passes
through an active band-pass filter while the high frequency group
is passed through a VCA (Voltage Controlled Amplifier). The high
group is used as a point of reference to make dynamic amplitude
corrections to the high frequencies.

The RMS average loudness detectors continuously monitor both the
mid-range and high frequencies to compare the relative
harmonic content levels of the two bands and apply the appropriate
amount of control voltage to the VCA, thereby determining the amount
of high frequency harmonic content present at the final output of the
BBE processor.

2 - BBE 262 INSTALLATION INSTRUCTIONS

FRONT PANEL CONTROLS

1. CHANNELA: LO CONTOUR CONTROL: Each channel is equipped with a LO CONTOUR control. This control is a low

frequency adjustment for the BBE 262. It provides a boost of 10dBu when turned to its maximum position (clockwise) at 50Hz.
When turned to its minimum position, (counter-clockwise), the low frequency is flat.

2. CHANNELA: PROCESS CONTROL: Each channel is equipped with a BBE PROCESS control. The BBE Process gives the
user a more detailed perception of tonality, added ‘bite’ and an increase in clarity. The low frequency range of the program material
will be tightened while the high end will be crystal clear without adding or creating any additional noise or harmonic distortion.
When the knob is in its minimum position, completely counter-clockwise, no process is taking effect. Turning the knob clockwise,
will introduce the BBE Process. Adjust the knob to mix the desired amount of BBE Process to suit your taste. The BBE Process
also has its own in/out switch for comparison of the processed to unprocessed signal located on the front panel. Experiment with the
process. Use the BBE Process as an extension of the tone controls. The BBE Process is not an effect, but a sonic improvement. To
start, set the BBE PROCESS knob to its 12 o’clock position, then adjust accordingly.

3. CHANNEL B: LO CONTOUR CONTROL: Same as Channel A Lo Contour Control.

4. CHANNEL B: PROCESS CONTROL: Same as Channel AProcess Control.

5. BBE FUNCTION: This switch engages the BBE Process. When depressed, the ‘IN’ position, the indicator LED will illuminate

Green indicating that the BBE Process has been engaged. When in the ‘OUT’position, the indicator LED will illuminate RED,
indicating that the BBE Process has been disengaged.

BBE 262 INSTALLATION INSTRUCTIONS - 3

1 2 3 4 5

REAR PANEL CONNECTIONS

6. A.C.INLET: This jack is for connecting the 12 VAC power source.

7. POWER SWITCH: This push button switch applies AC power to the BBE 262 Sonic Maximizer and is used for turning the unit

on and off.

8. FOOTSWITCH INPUT: This mono jack is for connecting any mono shorting footswitch. Using the remote switching jack
defeats the front panel function switch and allows the selection of process on/off via footswitch.
9/11. UNBALANCED OUTPUTS: Each channel is equipped with a 1/4” phone jack. Each output sends a low impedance line
level signal. The recommended single load impedance is at least 10k Ohms. (The ‘load’is determined by the input impedance of the
next subsequent component in the signal chain). The maximum output is rated at +17dBu. The output impedance of the BBE 262 is
1k ohm. NOTE: Actual output level will vary due to the selected position of the BBE Process, and the actual input signal level.
10/12. UNBALANCED INPUTS: Each channel is equipped with a 1/4” phone jack. Input range can be any level from -45dBu to
+6dBu. The input impedance of the BBE 262 is 50k ohms.

4 - BBE 262 INSTALLATION INSTRUCTIONS

GENERAL OPERATION

THE BBE 262 IS ALINE LEVEL SIGNAL PROCESSOR AND IS TO BE CONNECTED PRIOR TO THE POWER AMP
IN ANYAUDIO SYSTEM. SIGNIFICANT DAMAGE MAY BE INFLICTED TO THE BBE 262 OR ANY SUBSEQUENT
COMPONENT IN THE SYSTEM IN THE EVENT THE OUTPUT OF A POWER AMPIS CONNECTED DIRECTLYTO
THE BBE 262.

In order to reduce the risk of damage to any equipment, properly connect all cables and power cables before turning on any
components in the system. Most important of all, ALWAYS TURN ON THE POWER AMPLIFIER LASTTO AVOID

DAMAGING THE SPEAKERS OR THE AMP.

The BBE 262 may be utilized in a number of different environments and its results may vary accordingly. Because both channels are
completely independent from each other, only one channel of the BBE 262 may be used, or each channel processing a different
signal source. The effects loop is the ideal placement in the signal chain of a guitar application. In a pre-amp, keyboard or P.A.
application, the BBE 262 works best as the last component in the signal chain, just before the crossover or power amp. Important:

In a P.A. application, never connect the BBE 262 into the effects loop. The inherent phase shift of the BBE Process will cause
phase cancellation resulting in a partial loss of signal.

BBE 262 INSTALLATION INSTRUCTIONS - 5

BBE AND EQUALIZATION

The most common question asked of the BBE Sound, Inc. service department is: “Where does the BBE Processor connect in the
signal chain, before or after the equalizer?” Many people find that the same amount of equalization is no longer needed, if at all,
when a BBE processor is used. Additionally, the amount of equalization used will help determine the BBE 262’s proper location in
the signal chain: If the EQ is being set to give the room a flat response as determined by a spectrum analyzer, the BBE 262 will
work properly before or after the EQ. (Placing the BBE 262 after the EQ is recommended.) If the EQ is being used for drastic tone
alteration, the recommended placement would be before the EQ. Neither of these configurations will harm the BBE 262.

When the BBE 262 is being used in a single instrument application, guitar, keyboards, etc., it may be advantageous to experiment
with the proper placement of the BBE in the signal chain. The BBE 262 will improve the sonic quality of the instrument and any
effects that may be present as well. Important: Generally, reverb and delay do not affect the BBE negatively. However, it is possible
that with a large amount of effects added to an instrument that the BBE may process irregularly. If this occurs, reconnect the BBE
262 as the first item in the processor chain.

Use the following illustrations as a starting point for proper placement of the BBE 262.

• FOOTSWITCH APPLICATION

Connect the BBE 262 to any mono shorting footswitch.

6 - BBE 262 INSTALLATION INSTRUCTIONS