NAD Electronics VISO THIRTY, VISO TWENTY Owner's Manual

VISO TWENTY
VISO THIRTY

Owner’s Manual

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Unplug this apparatus during lightning storms or when unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.

14. WARNING: To reduce the risk of fire or electric shock, this apparatus should not be exposed to rain or
moisture and objects filled with liquids, such as vases, should not be placed on this apparatus.

15. To completely disconnect this equipment from the mains, disconnect the power supply cord plug from the
receptacle.

16. The mains plug of the power supply cord shall remain readily operable.

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 product.

Notes on environmental protection

At the end of its useful life, this product must not be disposed of with regular household
waste but must be returned to a collection point for the recycling of electrical and
electronic equipment. The symbol on the product, user's manual and packaging, point
this out.

The materials can be reused in accordance with their markings. Through re-use,
recycling of raw materials, or other forms of recycling of old products, you are making
an important contribution to the protection of our environment.

Your local administrative office can advise you of the responsible waste disposal
point.

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Table of Contents

I. Quick Start 4

II. More on Speaker Positioning 5

A. Main Speakers
B. Surround Speakers
C. Subwoofer
D. Wall Mounting

III. Additional Details on Configuring Your VISO System 7

A. Important
B. Selecting Speaker Wire
C. Configurations
D. Tighten Terminals
E. NAD VISO DVD Receiver Setup
F. Subwoofer Level
G. Subwoofer LED Indicator
H. AC Power Switch

IV. Protecting Your Speakers 15

V. Cabinet Care 15

VI. In Case of Problems 15

VII. In Case of Problems with your Subwoofer 16

VIII. Specifications 20

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Thank you for your purchase. The NAD VISO speakers are designed to deliver
high performance in many uses, and we hope they add much enjoyment to your
listening life.

I. QUICK START

A. Attach the supplied adhesive backed bumpers near the corners of the LR5’s

and C20’s bottom surface to protect the finish of speakers and furnishings.

B. Position LR5 speakers as symmetrically as possible, at a comfortable

distance from your seating position—slightly closer to each other than they
are to you. Position the C20 center channel directly above or underneath
your TV screen. (Keep its front as much in line as possible with the front of
the picture.)

C. Using standard lamp “zip cord” (18 gauge/1.0mm dia) wire or better, connect

the Red (positive) binding post of each speaker to the Red terminal of your
signal source on the channel. Similarly, connect Black (ground) on each
speaker to Black on that channel's signal source. (If the output of the signal
source is via a proprietary cable with a jack at one end, connect the color­coded wires at the other end of the cable to the speaker's similarly-coded
posts.) Be sure to follow color-coding to make sure that your speakers

are “in phase” for smoothest sound with deepest bass.

D. The loudest bass output from a subwoofer will come from corner placement.

As you position the subwoofer outward from the corner along one wall or
another, bass output diminishes somewhat, it also becomes more uniform
throughout the room, with fewer of the “standing waves” that produce peaks
and nulls at various points. Turn off all other components, and follow one of
the connection diagrams. Connect the supplied power cord to the AC power
socket, then plug the subwoofer into an active AC outlet. The same receptacle
as the rest of your audio/video system or another on the same electrical
circuit should be used to avoid ground hum. Set the subwoofer’s phase switch
to 0° and volume switch to 0dB. Flip the Power Switch to the on position.

E. Turn ON your NAD VISO DVD Receiver. If you're using an NAD VISO FIVE

DVD Receiver, ensure that the settings for “Front”, “Centre” and “Surround”
speakers are all set to “Small” via the “Speaker Settings” section of the Audio
Setup menu.

pressing the button on the remote control select Center Channel speaker
and using the button select -3dB.

Receiver, configure the following settings via the Audio Setup Menu—in
“Listening Mode” set the mode to “DVS Reference” and in “Speaker Settings”
menu set “Front” to “Small”. Refer to the item about NAD VISO DVD
RECEIVER SETUP under the ADDITIONAL DETAILS ON CONFIGURING
YOUR VISO SYSTEM section to learn more about configuring your NAD
VISO system.

F. Find a comfortable volume setting and play a bass-rich program source.

Slowly adjust the [SUB] level button on the remote control of your NAD VISO
DVD Receiver until the subwoofer contributes a natural level of low frequency
sound. Now, please read the rest of this guide and fine-tune your installation
accordingly—it will be time well spent!

Return to Audio Setup menu and select Channel Levels. By

[?]

[<] If you're using an NAD VISO TWO DVD

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II. MORE ON SPEAKER POSITIONING

A. Main Speakers

The three factors to adjust according to your own tastes—keeping in mind
that you are the judge and the one(s) to be satisfied-are:

1. The closer you place speakers to room surfaces, the greater the
proportion of bass in their sound, because of the “focusing” effects of
nearby surfaces on lower, longer-wavelength frequencies. Positioning the
speakers near the intersection of two surfaces (wall and wall, wall and
floor, or wall and ceiling) will produce more apparent bass than placing
them near a single surface (a wall or floor or ceiling). The greatest
apparent bass will result from placement near the intersection of three
surfaces-in a room corner, near the floor or ceiling, where there will be a
reinforcing effect which is somewhat uneven, like that of a megaphone.

2. Distances of speakers from the wall can make a great difference in

the frequency balance, sonic spaciousness, and definition in their
sound, because of changes in the number, strength, and particular

frequencies of secondary reflections from surfaces. The sound will
generally have greater spaciousness, especially depth, if they are out at
least a foot (30cm) from the nearest wall.

3. Small changes in positioning may make a big difference in sound
quality. Because of the varying relationships of the dimensions of a room
and their relation both to where you place the speakers and where you sit,
the wavelengths of sound and their interaction both with you and with the
room can vary a great deal. There can be sharp increases or decreases in
the relative loudness of different frequency bands, greatly amplifying or
almost nullifying whole ranges. Since VISO Speakers are small and easy
to position, it's easy to experiment with small, incremental changes until
you are satisfied.

60°

Ideal speaker placement: 2.1

Ideal speaker placement: 5.1

30° 30°

100°100°

B. Surround Speakers

Begin with the knowledge of the above factors about main speakers. Then
modify things as needed for your convenience and the surround effect that
works best for you. If you want maximum localization and definition, you
probably will want to aim the speakers toward your seating area, both

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horizontally and vertically. If you prefer the surround effect to be more
diffused rather than pinpointed, aiming the speakers somewhat away from
your ears probably will be more satisfying. You may want even to place them
to reflect their sound off the sides or rear of you room rather than have them
radiate toward you. Side-wall positioning, slightly behind you as specified in
our Quick Start tips, is preferable to most listeners, but rear-wall placement
can work well-especially for bouncing the sound off the side walls.

C. Subwoofer

There is no argument among audiophiles that the loudest bass output from a
subwoofer comes from corner placement. The natural megaphone-like flaring
outward of walls from a room corner focuses low frequencies—giving them no
place to go but toward you. It may be too much bass for your room or (more
particularly) your favorite listening spot in the room, but unless you are seated
in a “null” spot, where sound from the sub is cancelled or diminished by out-of
phase reflections from elsewhere, there should be plenty of bass from corner
placement.

If you are seated in such a null spot, your only real choices are generally to
move either the subwoofer or your listening position until bass returns to the
point that satisfies. Cranking up the level control almost certainly won’t help
much. But flipping the phase control 180 degrees sometimes may make a
difference, especially if the null is a product of cancellations caused by
interaction with low frequencies from your main speakers.

Subwoofer

Subwoofer

60°

Subwoofer

60°

60°

Most bass output; least

even bass response

Moderate bass output;

more even bass response

Lowest bass output;

most even bass response

If you are in the opposite sort of situation, where direct and reflected bass
waves converge in phase and produce a strong peak at your listening
location, you can—if you like—deal with that both with changes in placement
or in the position of your sub’s level control (or, less likely but possible, the
crossover frequency chosen). We say “if you like” because there is no such
thing as too much bass for some listeners, and we don’t want to be dogmatic.
You are definitely the one who has to be pleased, unless your Significant
Other chimes in to the contrary. As you go outward from the corner along one
wall or another, the general consensus (with which we tend to agree) is that
while bass output diminishes somewhat, it also becomes more uniform
throughout the room, with fewer of the “standing waves” that produce peaks
and nulls at various points.

Chances are things won’t be so simple, so the best method for positioning a
subwoofer, although a rather undignified-looking one, is to put the subwoofer
in your listening chair, then play music with lots of bass through the system

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