Tannoy 6D 66D & 8D - Manual (Page 3)

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1.1: INTRODUCTION
The Tannoy Reveal Digital range of near field monitoring speakers builds upon the success and worldwide reputation of the
famous original Tannoy Reveal Active. Since the launch of the original Tannoy Reveal Active in 1998 there have been significant
advances in digital speaker measuring techniques, acoustic CAD design and simulation, and precision manufacturing processes.
The Tannoy Reveal Digital range now provides greater bandwidth, significantly lower levels of distortion, smoother responses,
more accurate phase control, and higher sensitivity levels; all within compact cabinet sizes. Also, much has been learnt about
the near field listening environment - the effects of boundary walls, acoustic reflections from mixing console surfaces and the
acoustic properties of often sparsely prepared PC/Mac post production editing situations.
The Tannoy Reveal Digital range of monitoring speakers can be optimised for far field, mid field and near/close field free space
situations right through to far field, mid field and near/close field situations in difficult acoustic spaces such as meter bridge
positions, adjacent to walls or reflecting surfaces and space restricted PC/Mac based sound editing environments.
Acoustic space environments are referred to as 4pi, 2pi and pi representing the solid angle in space (steradians) into which the
speaker is radiating. These environments are frequently referred to as free space, half space and quarter space listening
conditions . The type of acoustic space into which a speaker radiates, defined by nearby solid boundaries, affects the acoustic
air load presented to the speaker and so the relative radiating efficiency at various frequencies. In different pi spaces the linearity
of the amplitude response changes, especially within the band 50Hz to 800Hz.
Varying distances encountered between the monitors and the listener are generally referred to as far field (greater than 3m or
10 feet), mid field (2 to 3m or 6 to 10 feet), near field (1 to 2m or 3 to 6 feet) and close field (around 0.5m or 1.5 feet). The
proximity of the listener to the speaker changes the way the listener perceives the sound balance from the speaker. At large
distances from an acoustic source plane waves are perceived. At small distances from an acoustic source the waves appear
spherical.
2.0: THE BASICS 2.1: UNPACKING AND VISUAL CHECKS
The Reveal 6D’s are packed in pairs and the Reveal 8D and 66D’s are packed singly. To remove the speakers from the carton
without damage open the end flaps fully and bend them right back (remember they are packed in pairs). Turn the package
upside-down on the floor and lift the carton vertically up to leave the speakers resting on their packing tray. Nothing on or in
your speakers should rattle about. Inspect each speaker for signs of transit damage. In the unlikely event of this having occurred
inform the carrier and the supplier. Keep all the packaging if damage has occurred, as this will show evidence of excessive
handling forces. It is also a good idea to keep the packaging if possible for future transportation.
AS THE COLOURS OF THE WIRES IN THE MAINS CABLE MAY NOT CORRESPOND WITH THE COLOURED MARKINGS
IDENTIFYING THE TERMINALS IN YOUR PLUG, PROCEED AS FOLLOWS:
The wire which is coloured GREEN AND YELLOW must be connected to the terminal in the plug which is marked either by the
letter E, the earth safety symbol, or coloured GREEN or GREEN and YELLOW.
The wire which is coloured BLUE must be connected to the terminal in the plug which is marked by the letter N or coloured BLACK
The wire which is coloured BROWN must be connected to the terminal in the plug which is marked by the letter L or coloured RED.
Ensure that the terminals are tightened securely, and no loose strands of wire are present. Ensure cord grip is clamped over
outer sheath of cable, rather than over the wires.
FUSE PROTECTION
An additional mains fuse is provided in the IEC power inlet on the back of the loudspeaker, which can only be removed with
the power cord unplugged. This must be replaced by a fuse of the same type and ratings (see Specifications or refer to rear
panel).
INSTALLATION
Do not install this equipment in an enclosed space. Do not limit free ventilation and movement of air around the back panel.
Do not install this equipment in a cupboard with a closed door. Allow for a distance of 150mm (6 inches) of free air space
around all sides, top, bottom and the back panel of this product. The user must be able to see the blue coloured front panel
of this product when in use.
EMC
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This
equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Reorient or coil cables.
If necessary, consult the dealer or an experienced radio/television technician for additional suggestions.
Any cables the user adds to the device must be shielded to be in compliance with the FCC standards. Any unauthorised modification
to this device could result in the revocation of the end user’s authority to operate this device.
This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) This device must accept any interference received, including interference that may cause
undesired operation.
Canada
Industry Canada Class B emission compliance statement. This Class B digital apparatus complies with Canadian ICES-003.
Avis de conformite
a la reglementation d'Industrie Canada. Cet appareil numerique de classe B est conforme a la norme NMB-
003 du Canada.
2.2: PRELIMINARY RECOMMENDATION
Initially we would like to give a word of warning on high sound levels, which these speakers are capable of generating over
sustained periods of time. Levels over 95 dB for 8 hours per day can eventually cause permanent hearing loss. Because Tannoy
monitors have very low levels of time, amplitude and frequency distortion it is not always obvious that the sound level is high
while working with them.
For continuous exposure we recommend the occasional use of a sound level meter capable of integrating the sound level over
a period of exposure according to noise control standards. This should be used just to check that noise levels are always within
safety limits.
3.0: REVEAL D SERIES FEATURES
A set of DIP switches on the rear panel of each speaker can be set to choose the optimum speaker response for these real life
and often difficult situations, so that the frequency response from the speaker is always substantially flat. We are not equalising
the room modes due to standing waves or resonant structures, we are equalising the speaker to take account of the varying air
load presented by the room and surrounding large structures such as the mixing desk.
The switches are arranged in groups according to their function and each switch can be set to the 'on' (down) or 'off' (up) position
in various combinations to achieve a flatter, more balanced response within a wide variety of acoustic spaces and with far, mid,
near and close field monitoring positions.
Figure 1 shows the range of equalisation available in the 50Hz to 800Hz region and also shows the degree of trim available
in the bass, upper midrange and high frequency areas,