Acoustech Ht-8c Installation instructions

AcoustechHT-8C

Ceiling Speaker System

Installation and Owner’s Manual

Acoustech

A Company

CONGRATULATIONS

–on selecting this Acoustech Ceiling Speaker. Like all Acoustech speakers, they combine advanced acoustic

technology with durability and will provide years of musical enjoyment.

This manual is designed to make your ceiling speaker as easy to install as it is to listen to. If you’ve

had any home “do-it-yourself ” experience, you should find installation of your new speaker a simple job.

However, we suggest you read through this manual before starting out. If you then decide that installing

your Acoustech Ceiling Speaker is a bit beyond your skills, we’ve included suggestions for locating sources

of affordable outside help.

What you need to do the job

Speaker system parts inventory.......................................................................2

Tools for installation .......................................................................................2

Speaker wire...................................................................................................3

Amplifier considerations.................................................................................3

Where to put your speakers

Various uses....................................................................................................3

Stereo imaging................................................................................................3

Other acoustic considerations ........................................................................3

Surround sound..............................................................................................3

Wall & ceiling surfaces ...................................................................................4

Speaker wire paths .........................................................................................4

Painting your speakers...........................................................................................4

Cutting holes for the speakers................................................................................4

Running connecting wires......................................................................................5

Hooking up your speakers

At the speaker end..........................................................................................6

At the amplifier end ........................................................................................6

Final assembly........................................................................................................6

Ashort “test drive” ................................................................................................6

Aquick troubleshooting guide........................................................................7

Further reading

Taking care of your new in-wall speakers.......................................................7

More on amplifiers and impedances...............................................................7

Installing Acoustech speakers during new construction..................................7

Acoustech HT-8C description and specifications .............................................8

Outside help ...................................................................................................8

Limited Warranty ............................................................................................8

DRAWING 1

Cut-Out Template

Speaker

Grille

TABLE OF CONTENTS

WHAT YOU NEED

TO DO THE JOB

SPEAKER SYSTEM

PARTS INVENTORY

Before you get involved in the actual installation

process, it’s a good idea to check for possible

shipping damage and identify parts and hardware.

You should have the parts shown in Drawing 1:

mOne (1) Acoustech loudspeaker system

with attached grille

mWhite cardboard mounting template

(outer perforation)

mWhite cardboard masking template for

painting (inner perforation)

mBlack grille adhesive

If anything is missing after a thorough search

of the box and packing materials, contact the

dealer where you bought your speaker.

Although the Acoustech Ceiling System is

extremely well packed to withstand the rigors

of shipping, you should still inspect it closely,

especially if there is any damage to the outside

carton. If you find anything wrong, contact your

dealer or the shipper who delivered the speaker.

TOOLS FOR INSTALLATION

IN EXISTING WALLS

It doesn’ttake a whole workshop to install

your new speaker, just a few simple tools:

mApencil

mAdrill with a 1-inch flat bit

mAretractable utility knife or keyhole saw

mAlength of stiff wire about 3 feet long (a

straightened wire coat hanger works fine)

mAPhillips-head screw driver which will fit the

black screws included with your speakers

mApair of diagonal pliers or wire strippers

Some of the following may also be needed,

depending on the application.

mAstud finder

mDrill bit just slightly larger than the diameter

of one speaker wire

mPlumb bob or small weight on a string

mInsulated staples for securing speaker wire

mMasking tape or foam “double-stick” tape

mPaint and applicator for changing grille and

outer frame finish

Black grille

adhesive in

polybag

SPEAKER WIRE

The amount of wire you’re going to need will of

course vary with speaker placement (which we

cover next). But we’re covering the subject of

wire now because it’s something you may have

to go out and obtain along with whatever tools

you don’t already have.

What kind to use

We recommend using inexpensive, multi-stranded

“zip-cord” for amplifier-to-speaker connections.

Also called lamp cord, it’s sold in pre-packed

rolls and in bulk displays at hardware, lighting

and home improvement stores. Zip-cord’s outside

covering (insulation) can be transparent, black,

brown, white, etc. Color doesn’t matter. Wire-

thickness does. For in-wall and in-ceiling, a good

quality wire should be used so the outside plastic

covering won’t crack and break down over time.

Selecting the proper gauge

Wire is measured in “gauges.” For no particularly

good reason, the bigger the number, the smaller

the wire. For example, 18-gauge is thinner than

14-gauge.

The gauge of wire you need is determined by the

distance between your amplifier/receiver and

the speakers. Use the following chart as a guide:

Length Minimum Gauge

Less than 10 ft. 18

10 to 50 ft. 16

Over 50 ft. 14

If in doubt, be safe and get a smaller gauge

(i.e. thicker wire). Using too thin a gauge over

along distance can compromise sound quality.

And besides, there isn’tavast cost difference

between gauges, anyway.

How much to buy

Basically, more than you think you need. As we

noted earlier, a discussion of lengths is sort of

premature until you’ve decided on exact place-

ment, so you may want to skip to Section B on

“Where to put your speakers.” But if you

have a rough idea of the distance from your

amplifier to the speakers, here are a few tips:

• Because of the complicated paths which are

often required to route wires, you’ll definitely

need more than the amount derived from

simple measurements.

• Professional installers often use the following

rule of thumb: “As the crow flies” amp to

speaker distance TIMES FIVE. That allows

enough for both speaker paths plus a very

healthy margin for unplanned detours.

Remember the electrician’s favorite adage:

“You can always cut off extra wire, but

they don’t stretch worth a darn.”

use a more powerful amplifier if you take

some simple precautions, which we cover on

page 7 (“Taking care of your new

Acoustech speakers”).

Amore serious consideration is whether or

not you intend to power more than one set of

speakers with the same amplifier or receiver. If

you intend to hook speakers to both “A” and

“B” receiver outputs and then play both sets of

speakers at the same time, you should read the

section starting on page 7 of this manual

(“More on amplifiers and impedances”),

to avoid potential problems.

VARIOUS USES

Acoustech Stereo Ceiling Speakers can be

used for background music, as a primary

listening system or as built-in rear surround

speakers in an audio/video home theater.

Background music

If you just want low-volume background

music to float through a room, placement for

best acoustics is not particularly critical. You

can pretty well ignore all our diagrams and tips

on imaging and other acoustical matters. Just

put your speaker where it’s convenient and non-

intrusive to room decor. You can even place the

speaker in an adjoining room, such as a living

room that flows into a formal dining room, or in

akitchen and breakfast nook.

Surround sound

Acoustech Stereo Ceiling Speakers make excellent

surround sound speakers. They can be mounted

in any of the positions shown in Drawings 2

and 3, especially from the ceiling.

OTHER ACOUSTIC

CONSIDERATIONS

For best fidelity, there are several other factors

to keep in mind before you start actual installation.

Acoustech ceiling speakers may be

used for rear surround sound chan-

nels by placing them (1) behind or (2)

in the ceiling, just behind the viewer.

DRAWING 2

DRAWING 3

Open

Attic

Acoustech

Speaker

Standard Room

DRAWING 4

Cone of

Coverage

AMPLIFIER CONSIDERATIONS

Virtually any receiver, power amplifier or inte-

grated amplifier can be used with your Acoustech

Stereo Ceiling Speaker. Although Acoustech

speakers are rated for high power,it’s OK to

WHERE TO PUT

YOUR SPEAKERS

Since these are primarily used in ceiling applica-

tions, we highly recommend installing in an open

attic space. If you need to go into the ceiling of a

first floor room (in a two story house), we rec-

ommend the use of a professional installer.

Placement can make all the difference in how

your Acoustech speaker systems sound – and

how easy they are to install. There are at least

Vertical placement

Treble frequencies are

quite directional. While

the dome tweeters in

Acoustech HT-8C

speakers are designed

to disperse high fre-

quencies over a wide

area, they will give you

the best sound when

positioned so that they

cover the listening

three “WHERE’S” and a “HOW” to factor into

your layout:

• HOW you intend to use your speakers

• WHERE they’ll sound best (acoustic

considerations)

• WHERE it’s possible to install them

(ceiling surfaces)

• WHERE they can be installed that makes it

easy to get wire to them without remodeling

your entire house.

area in a cone of coverage as shown in Drawing

4. Of course, if the speakers are being installed in

an area where listeners usually stand up (such as

akitchen or hallway), they are best suited for ceil-

ing mount (see Drawing 3).

Corners and reflections

When a speaker is placed close to the corner

of a room, bass frequencies are emphasized.

Treble is emphasized when it reflects back from

reflective surfaces such as large windows. Con-

versely,highs tend to be muffled by soft surfaces

such as drapes, rugs, upholstered furniture, car-

peted steps and even textured fabric wall paper.

WALL AND CEILING SURFACES

Now that we’ve covered where you should

put your speakers, let’s consider where you

CAN put them.

Acoustech HT-8Cs require at least 37/16˝of

depth (measured from the outside surface of the

wall). This means that they can be installed in any

wallboard-and-2 x 4 stud wall. In fact, the dense,

rigid nature of plasterboard or (lath and plaster

in older homes) acts as a superb speaker baffle.

You can also install Acoustech speakers in

stud walls covered with thick wood paneling or

in wallboard/plaster ceilings.

However, avoid:

• Stud walls covered only with thin veneer

paneling – the surface isn’t rigid enough and

can cause annoying vibrations and buzzing.

• T-bar “drop ceilings” with very thin

fiberboard panels which can buzz and

vibrate. If you suspect this will happen,

reinforce the drop-in panel with wood or

particle board.

• Any wall which can’tprovide proper depth

(clearance) for the back of the Acoustech

speakers to protrude. This includes brick

or concrete walls where the wallboard or

paneling is attached to thin furring strips.

• Walls where you know that there are pipes,

heating ducts and ESPECIALLY AC wiring in the

general vicinity. For example, if there is an

outlet along the baseboard, there is often a live

wire running partly up the wall at that point.

SPEAKER WIRE PATHS

The last consideration is the obstacle course

that lies between the speakers’ hoped-for

mounting positions and your stereo system.

Wire can be run through crawl spaces that lie

above your ceiling or below the floor, through

basements of second stories, or simply along the

perimeter of your listening room. We cover each

of these options in detail in the “Running con-

necting wires” section of this manual.

In general, you should pay particular attention

to the following areas:

• Avoid running speaker wires close to house

electrical wiring for any distance. If you have

to run them parallel, make sure to space the

speaker wires at least two feet from the AC

line. It is, however, OK for speaker wires to

cross paths with AC line or go through the

same hole together with house wiring if they

separate before and after.

• Make sure that the entire path between

speakers and amplifier is clear and not

obstructed by a major floor or ceiling joist

or masonry wall which you won’t be able

to drill through.

• Remember that the other end of the wires

has to come out somewhere to connect

with the amplifier. Confirm ahead of time

that you can drill an outlet hole easily and

in an unobtrusive spot.

CUTTING HOLES

FOR THE SPEAKERS

Wallboard is an easy surface in which to make

arelatively neat hole. Actually, the hole doesn’t

even have to be that neat, since the speaker’s

outer frame will cover it. Just make sure you

don’t make it any bigger than the template. In

the following steps, you’re going to locate a

section of ceiling between the woodframing or

in the wall between two studs, mark the outer

boundaries of the hole, drill a small hole in

the center to confirm your location and then

cut the main hole.

DRAWING 5

A. Trace template

outline

B. Drill 1 inch

pilot hole

C. Probe with wire

for stud clearance

D.Cut speaker

hole along outline

1. First you must determine the location of your

ceiling supports or wall studs so that the

speaker can be approximately centered

between them. There are several ways to go

about this:

•Tap on the surface and listen to the result-

ing “THUMP”. When it’s deeper, you’re

between studs. When it’s sharper and more

flat-sounding, you’re close to a stud.

•Use a stud-finder,asimple little magnetic

device which works by locating the lines of

nails hammered into the stud.

•Identify wall studs by the position of elec-

trical outlets or switches. There will be a stud

either directly to the left or right of an elec-

trical fixture. This gives you a point of mea-

surement, since studs are either 18 or 16

inches apart in newer houses, 12 inches

apart on pre-WW2 homes.

PAINTING YOUR

SPEAKERS

If you like the designer white finish which has

been applied to your Acoustech speakers, you

can skip to Step D. But if you want your speak-

ers to completely blend in with a colored wall

or accent the surface, now is the time to paint

their outer frames and perforated grilles.

The speakers’ outer surfaces are primed to

accept ordinary latex wall paint or aerosol spray

paint. Because the surface behind the perforated

grille should remain unpainted, you will need to

mask this area off before you begin painting.

1. First the speaker’s grille must be removed.

From the back of the speaker, use the

mounting legs to push the grille off.

2. If you are going to use standard, canned, wall

paint so your speakers will match the wall

color, you will need to thin the paint to nearly

the consistency of water. This is critical since

paint with any thickness will plug the holes in

the grille which will impede the sound from

getting to the room. Once you thin the paint it

may take several coats to get good consistent

color coverage without plugging the holes in

the grille. One trick to use is to blow air

through the grille holes as you are in the

painting process to keep the holes open.

Paint the outer speaker frame and grille

separately. A medium nap roller or fine brush

will work OK if you take your time and are

careful. If you're using spray paint, make

sure that you achieve the same coverage on

both grille and frame. Take care to use very

light coats on the grille to avoid plugging the

holes (perforations). Also, be sure to spray at

different angles to achieve good even coverage

of the perforations and edges. You must take

extreme precautions when painting the grille

not to get paint in the holes of the grille.

There's no need to replace the grille at this

time since you will need access to the inner

speaker surface during installation.

2. When you’re reasonably sure of where the

ceiling joist (studs or framing) or wall stud

2x4’s are (and are TOTALLY sure that there

isn’t an electrical cable, water pipe or heating

duct in that vicinity of your proposed cutout)

position one of the cardboard mounting tem-

plates and draw around the inside outline with

apencil.

3. Drill a 1-inch hole in the center of the pencil

outline which you have just drawn.

4. Obtain a length of stiff wire such as an un-

wound, totally un-bent coat hanger. Bend it

so that the last 12 inches is at a right angle to

the rest.

5. Insert the angled part into the 1-inch hole you

just drilled and probe to left and right to con

firm that a stud is not close on either side.

•If there is a close stud on one side, just re-

position the cardboard template a few inches

in the opposite direction and re-draw y o u r

pencil outline, keeping the 1-inch hole within

the pencil outline’sinner boundaries.

6. If there are no obstructions, cut the hole along

the pencil outline. If the surface is wallboard,

simply cut it increasingly deeper with utility

knife until it gives way and then pull it out by

grasping the cut-out through the 1-inch hole.

•If you’re dealing with lath and plaster or

thick paneling, you need to use a different

technique. Drill 1-inch holes at the corners of

the pencil outline. Then use a keyhole saw or

even a hacksaw blade with VERYslow strokes

to saw through and remove the inner surface.

7. Temporarily place the Acoustech speaker

into the cut-out to insure that it fits properly.

It’s OK if the hole is slightly large, since it will

be covered by the speaker’soutside frame.

Actual installation will happen later,after

you’ve routed the speaker wires.

8. Now it’s time to drill the hole on the OTHER

end – at the point where the wires from the

speakers will exit to the amplifier/receiver.

•Use the same 1-inch drill bit as before.

• If you want a totally finished job, install an

outlet box against a stud and cover it with a

TV cable or single outlet plate which has one

hole in the middle for the wires to exit from.

RUNNING

CONNECTING WIRES

Now you know were the wires have to run.

It’s time to actually route them.

1. UP TO SPEAKER you have an attic or

overhead crawl space, your two steps are:

1) Up from the amplifier to the crawl space;

2) Across the crawl space to the speaker.

UP TO SPEAKER

(ATTIC CRAWL SPACE)

See drawing 6

1. You’re about to ascend into your attic.

Grab the following:

•Tape measure

• Cordless drill with a 1-INCH BIT (or non-

cordless model with long extension cord)

•A VERY long roll of speaker wire

•Wire cutters – either diagonal pliers or

wire strippers which include a cutting surface.

•Plumb bob or string with a small weight

(such as a metal nut) on the end

•Tape – any kind will do

2. Crawl up into the attic with all the afore-

mentioned stuff and proceed to a spot that’s

directly over the speaker cut-out hole.

3. Time to use that roll of cable. Push two

cables through the speaker cut-out.

4. Making sure the ends don’t get pulled back

up through the hole, reel out cable while

moving across the attic/crawl space until you

reach the location above your amplifier.

5. Extend at least 10 (TEN) more feet of cable

for the roll and cut it.

6. You now have cables running from the

speaker. Time to get them down the wall

to where the amplifier will be.

7. Drill a 1-inch hole through the horizontal

2 x 4 directly above the amplifier wall outlet.

8. Now you’re going to guide cables down to

where they’ll emerge from the wall. Since this

hole isn’t very big, just stuffing them down and

grabbing them won’t work. Instead, it’s time

for the plumb bob or string-with-weight (or

wire if there’s insulation to contend with).

Tape the two cable ends (which come from

the speaker) to the plumb bob string just

above the weight and lower the whole thing

down through the 1-inch hole above the

amplifier. You’ll probably have to “feed out”

the attached cable to get the weight to descend.

9. Continue “feeding out” both cables until they

and the weight hit bottom. Tie the free end of

the plumb bob string to something so that it

doesn’t fall down the hole.

10. Exit the attic crawl space and stretch for a bit.

11. Go over to the 1-inch amplifier wire hole

and look for the extended string/plumb bob

and attached cables. If they’re not visible, fish

around for them with your stiff wire/unbent

coat hanger and pull them through the hole.

Then rescue the plumb bob from the attic.

12. At the speaker hole, things are much easier.

You can just reach through and grab the

cables. Pull their whole free length out the

cut speaker hole. You’ve done it!

DRAWING 6 DRAWING 7

HOOKING UP

YOUR SPEAKER

The main thing to remember when hooking up

the speaker is that two conductors in the speaker

wire are not interchangeable. One will be used as

a POSITIVE (+) conductor and the other as a

NEGATIVE (-) conductor. These correspond to

the RED (+) and BLACK (-) connectors on your

Acoustech Ceiling Speaker and also to the speak-

er terminals on your amplifier or receiver.

IDENTIFYING “+” and “-”

Your need to be able to discriminate between

the two conductors in the zip cord.

If your wire has transparent insulation, this is

easy: One conductor will be copper-colored and

the other silver-colored. Generally, professionals

denote the copper one as POSITIVE (+) and

the silver one as NEGATIVE (-).

If you’ve used wire which has an opaque insu-

lation, there are still differentiating markings.

Examine the wire closely and look for:

• A series of ribs or grooves on one conductor

• A painted stripe

• A single strand of yarn intertwined with the

multi-stranded wire in one conductor.

Denote any of these as the POSITIVE (+) con-

ductor for similar connections on both ends.

AT THE SPEAKER END

1. Cut off excess wire, leaving about 2 feet

extending through the speaker cut-out hole.

2. Pull the conductors apart so they’re separated

for the first two inches from their ends.

3. Using wire strippers, diagonal pliers or a

knife, remove 1/2inch of insulation from

each conductor.

4. Twist the tiny strands in each conductor into

tight spirals, as shown in Drawing 7.

5. IMPORTANT: Route the speaker wire

THROUGH the hole in the ceiling (Drawing 8).

6. Attach the speaker wires to the red and black

speaker terminals. Press down on the

protruding levers while inserting the wire

into the hole.

•Connect the POSITIVE (+) conductor to

the RED terminal and the NEGATIVE (-)

conductor to the BLACK speaker terminal.

•Make sure that no stray strands of wire

have gotten detached and are touching the

other main wire.

AT THE AMPLIFIER END

1. Cut off excess wire, leaving enough to com-

fortably reach from the hole in the wall to

your stereo system. If there’s a possibility that

you’re going to move the amplifier to ano-

ther part of the room, consider leaving some

excess wire coiled up. If you’ve used suffi-

ciently thick wire, this extra length will

not affect speaker performance and

could make things easier if the room is

rearranged later.

2. Pull the conductors on both speaker wires

apart so they’re separated for the first two

inches.

3. Using wire strippers, diagonal pliers or a

knife, remove 1/2inch of insulation from

each conductor.

4. Twist the tiny strands in each conductor

into tight spirals.

5. Attach the speaker wires to the red and black

speaker terminals on the amplifier or receiver.

•Connect the POSITIVE (+) conductor to

the RED terminal and the NEGATIVE (-)

conductor to the BLACK speaker terminal.

•Make sure that no stray strands of wire

have gotten detached and are touching the

other main wire.

DRAWING 8

DRAWING 9

FINAL ASSEMBLY

1. If you haven’t done so already during paint-

ing, remove the perforated grilles from

your Acoustech Ceiling Speaker. To remove

the grille, just use the mounting screw (dog

leg) on the rear to push the grille off.

2. See Drawing 9. Make sure all the clamping

brackets (dog legs) are turned inward as

shown in the picture before going up on the

ladder to install the unit in the ceiling.

3. Find the wire you ran previously (hopefully

hanging down through the hole you cut).

Strip the ends if you haven’t already done so

and connect as described in Section F.

4. Insert the speaker into the cutout hole and

be certain the wire is not hanging down

on the woofer cone.

5. Using a Phillips screwdriver (or powered

screwdriver,recommended), start tightening

the four screws. As you start the tightening

each of the mounting brackets (dog legs) will

swing around and follow the screw down to

the back of the wall and clamp the speaker

into place. Avoid excessive force when

tightening the screws to prevent deforming

the drywall or breaking the plastic clamp of

the speaker.Be sure to go around all four

screws and check for even tightness in the

clamping pressure.

6. Now is the time to aim the tweeter (if

needed) toward your primary listening area.

Gently push on the rim of the tweeter to

swivel it so the center is aiming toward the

area you want (See Drawing 10).

7. Replace the grille by gently pressing it into

place. Use the supplied black grille adhesive

around the edge of the grille when pressing

it into place.

ASHORT TEST DRIVE

It’s a good idea to test everything out at

this point.

Home Theater System

If you have connected your new Acoustech

Ceiling Speaker to the rear “surround” output

of your receiver,you will need to put your

receiver in the “Pro-Logic” or “Digital” mode

and use a source such as a DVD player or Hi-Fi

VCR and suitably recorded movie to test your

receiver surround operation.

Stereo Music System

1. Turn on your stereo system. Make sure that

the VOLUME control is turned down and that

the BALANCE control is set to center.

2. Activate a musical source such as FM, a tape

or CD player.

3. Gently turn up the volume. You should hear

music coming out of your new Acoustech

Ceiling Speaker! (If you don’t, refer to the

troubleshooting guide on the next page.

We suggest you read the section on the next page

titled “Taking care of your new Acoustech

Speakers” (for further operating tips).

DRAWING 10

A QUICK

TROUBLESHOOTING GUIDE

Before returning your Acoustech Ceiling

Speaker for service, it’s a good idea to check

out these simple remedies first.

No sound from the speaker

1. Incorrect source selected on receiver or

preamplifier.

2. Mute button pressed on receiver.

3. Wrong speaker output selected – many

receivers have an “A” and “B” speaker

switch. Make sure it’s in the right position.

4. Un-secure connection at either the speaker

or amplifier – double check them.

5. Balance control turned all the way left or

right – return it to center.

6. Surround mode not turned on and/or

surround level too low.

7. Bad connecting cable between sound

source and amplifier – try a new cable.

8. Defective speaker – contact your Acoustech

dealer or call 1-888-242-4551.

Intermittent sound from speaker or

speaker plays initially but then shuts off.

1. Short circuit at either the amplifier or

speaker connectors is activating the amp’s

protection circuits – double check connec

tions, making sure no stray strands of wire

from one conductor are touching the other.

Speakers plays but sound is mixed

with hum

1. It could be a faulty patch cord. If so, there

will be hum from your main speaker system

as well as from your Acoustech Ceiling

Speakers. Assuming you didn’thave hum in

your system before, one or both of the

speaker wires has been run too close to

internal AC house wiring. Re-route it so

that it stays at least 2 feet away from AC

power wiring when running parallel.

Speaker plays but sound is muffled and

“strained.” Amplifier may shut off if

volume is raised too far.

1. Too thin a gauge of wire has been run too far

adistance between amp and speaker. Make

sure that you have followed our suggestions

as to wire gauge versus overall distance.

When volume is turned up to a high

level, the treble cuts in and out.

1. The Acoustech Stereo Ceiling Speaker

features a special protection circuit which

electronically disconnects the tweeter if it

starts getting too hot. Turn down your

amplifier and make sure to read the section

of this manual titled “Taking care of

your new Acoustech speakers” which

starts on this page.

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