CNET's surround-sound buying guide
By CNET staff
15/11/2005
URL: http://asia.cnet.com/reviews/home_av/others/0,39037627,39203125,00.htm
If you're feeling surrounded by questions instead of enveloping sound, you've come to the right place. We have suggestions on how to shop for everything surround, from A/V receivers to multichannel speakers to full home-theater systems.
How much do I need to spend?
This first part is easy. Just factor in the variables of budget, room size, and the
quality/quantity of the components, and you'll know approximately where you
stand. Price brackets: US$500 or
less | US$1,000 or less | US$1,500 or less | More than
US$1,500
| PRICE |
ROOM SIZE |
WHAT YOU'LL GET |
US$500 or less
|
Think small, cozy bed or living rooms measuring less than 200
square feet.
|
A feature-packed home theater in a box (HTIB) that includes a
receiver/DVD player or changer, five satellite speakers, and a
subwoofer. |
US$1,000 or less
|
Moderately sized bedroom or living rooms measuring less than
300 square feet.
|
You can choose between a midline HTIB or mix 'n' match an
entry-level receiver, a DVD player, and a 5.1-speaker package. If your
monitor/TV is capable of displaying a 480p image, go for a HTIB or DVD player
with progressive-scan output. |
US$1,500 or less
|
Large living rooms or dedicated home theaters measuring more
300 square feet. You can, of course, still use these systems in smaller
rooms.
|
An upscale HTIB or a customized setup that includes a midline
receiver, an SACD/DVD-Audio/DVD player with progressive video outputs, and
either a matched speaker package or select speakers from a manufacturer's line
of speakers and subwoofers. |
More than US$1,500
|
Large living rooms or dedicated home theaters measuring more
300 square feet. Those who want a first-rate system in a more intimate home
theater or plan to add quality sound to another room (a.k.a., a zone) should
also consider stepping into this bracket.
|
A high-end HTIB or a customized setup that includes a
top-rung receiver, an SACD/DVD-Audio/DVD player with progressive video outputs,
and either a matched speaker package or select speakers from a manufacturer's
line of speakers and subwoofers. |
Home theater in a box (HTIB)
Most HTIBs combine a 5.1-speaker package with an A/V receiver that has an integrated
DVD player. The only missing piece is a TV. HTIB prices range from less than
US$300 to in excess of US$3,000. HTIB types: Cheap thrills | High on
style | Component packages | Exotica: specialty and
wireless Cheap thrills
Upside:
Affordable; compact; comparatively easy to set
up. Downside: Won't rock the house; spotty build
quality. Budget-priced HTIBs almost always feature small speakers and
subwoofers. Sound quality isn't always stellar, but some low-end HTIBs sound
pretty decent. Power ratings fall within the 25-to-50-watt-per-channel
range. That's enough to fill a small room with sound; just don't expect massive
loudness capability from a wee HTIB.
|
Samsung HT-P40 |
 |
Surround formats are limited to
basic Dolby Digital/Pro Logic II and DTS/DTS Neo:6, while connectivity options
are typically restricted to just two or three A/V inputs. If you have an
HD-ready TV and are looking for the best possible picture quality, make sure the
DVD player has component/progressive video outputs.
Have a large
collection of videotapes? A few HTIBs combine a receiver, a DVD player, and a
VCR into a single component. |
High on style
Upside:
Elegant appearance; features galore; comparatively easy to set
up. Downside: Still won't rock the house; limited
bass output; sleek-looking electronics usually have limited connectivity
options.
A number of manufacturers offer sleek HTIBs with petite
satellites (5 inches tall or even smaller). At the other extreme, you can buy
HTIBs with tall yet incredibly slender floor-standing speakers. Some HTIBs tuck
their amplifiers inside the subwoofer, which allows the manufacturer to trim
down the receiver/DVD player component to truly svelte sizes.

Single-play
and DVD-changer models are available. Single-play models are the most compact
and smoothest-running, and they tend to be the most reliable. The changers,
which typically hold three to six discs, may be either single-tray-loading or
carousel-style mechanisms. Tray changers can be almost as compact as the
single-play models, though they're usually noisier and slower as they go about
their disc-changing operations. Carousel models are faster and quieter, but the
drawback is they grab a lot of shelf space; many are 17 inches wide and 15 to 18
inches deep.
Component packages
Upside:
Solid build quality; features similar standalone components; generous
connectivity. Downside: More involved setup; clunky
component styling; speaker packages usually far below the quality (and price) of
separate speakers. Rather than combine the receiver and the DVD player
in one compact unit, some manufacturers offer HTIBs built around separate
components. This approach forfeits most of the space-saving allure of the
classic HTIB, but there are performance advantages to the separates route.
|
Onkyo HT-S667C |
 |
With component-based HTIBs, their larger size lets
designers fit in more power and significantly greater connectivity options.
Component systems provide inputs for a larger number of external sources, such
as satellite, VCRs, and cassette decks, than one-piece HTIBs.
A few
companies sell receiver/DVD player combos that don't come with speaker packages,
which affords you the flexibility of selecting exactly the speakers that work
for you. |
Exotica: specialty and
wireless
Upside:
Space-saving HTIB design still incorporates cutting-edge
technology. Downside: Sometimes expensive--you might
as well buy first-class separates. The booming popularity of HTIBs shows
no sign of abating, which explains why most cutting-edge trends eventually find
their way to upmarket systems.
|
Niro Two6.1 home-theater
system |
 |
The latest development is DVD recorders. These
HTIBs can record TV programs and dub recordings from a video camera onto DVD-R.
More and more HTIBs now feature Super-Audio CD and/or DVD-Audio
capability. Some high-end models, such as Niro's Two6.1 (pictured), dodge the
"five speakers plus subwoofer" rule and create surround sound with fewer
speakers. Some even use wireless rear speakers. Speaking of speakers,
6.1-channel HTIBs with Dolby EX/DTS ES processing are also
available. |
A/V receivers
Audio/video receivers differ from older stereo receivers because they offer video switching
to allow the image to follow the audio when you change sources. They don't just
supply power and decode the surround sound on your DVDs--they're also the
control centers of any home theater.
Receiver price
brackets: Entry level (under US$300) | Midrange (US$301 to US$600) | High end (US$600 and up)
Entry level (under
US$300)
Upside:
Nowadays, entry-level receivers have just about everything anybody needs for
home theater. Downside: Lightweight build quality;
inflated power ratings; poorly designed remotes. Entry-level receivers
can usually do pretty much everything. A good number offer 6.1-channel Dolby
EX/DTS ES surround processing--but if your living space is tight, you'll
probably use a standard 5.1-speaker package. The 6.1 models add one or two extra
rear-surround channels over the standard 5.1 array to create a truly enveloping
soundstage in large rooms.
Many inexpensive receivers can output
6.1-channel sound.
Power ratings run from 50 to 100 watts
per channel. In this price range, many of the ratings are inflated, so the specs
aren't a good way to judge real-world performance. Connectivity options
are usually adequate for most systems, and they include multiple digital inputs
and even component-video switching. Most models also have 5.1-channel inputs for
DVD-Audio/SACD.
Midrange (US$301 to
US$600)
Upside:
Features galore; plentiful connectivity options; midline receivers are more
solidly constructed than entry-level
models. Downside: More expensive; systems can be
fairly huge and hog too much shelf space. Beyond the now standard Dolby
Digital/DTS and 6.1-channel Dolby EX/DTS ES surround-processing modes, some
midrange receivers offer the latest trick from DTS: 96/24. This technology is
similar to DVD-Audio in that it offers high-resolution 96/24 5.1-channel sound,
but it also offers full-motion video capability (DVD-A has limited video
capacity). Another advantage is that you don't need to buy a new DVD-Audio
player; DTS 96/24 will work with most DVD players.
An onscreen display makes setup more
convenient.
Also, thanks to their superior digital
processing capabilities, midpriced receivers offer better synthesized surround
modes such as Jazz Club, Rock Club, Cathedral, and so on that can be used to
"open up" the sound of stereo recordings. Onscreen displays (using your
TV) ease surround setup and general navigation chores. Programmable remotes
control TVs and other A/V components, while more-expensive models employ LCDs or
keypads to make universal remote setup easier.
Better receivers also have more inputs, including front-panel digital inputs, digital monitor outputs, and more than one VCR/DVD-R recording loop. If you're a satellite radio fan, you might also want to consider buying an XM-ready receiver. Add a low-cost XM Connect-and-Play module such as the Audiovox CNP1000, and you can receive satellite radio on your receiver. It reduces the clutter in your equipment rack and can be easily connected to new compatible receivers whenever you upgrade.
High end (US$600 and
up)
Upside:
At this price range, expect honest power ratings, up-to-the-second features, and
great sound quality. Downside: An overabundance of
features can mean overly complex setup chores. In a perfect world, power
ratings would give some indication of the loudness potential of A/V receiver.
But unfortunately, not every 100-watt-per-channel receiver is created equal.
What's inside does make a difference, and beefy power transformers and
capacitors are not only heavy but also expensive; that's part of what you're
paying for here. And while the Lucasfilm/THX certification is a little bit of a
marketing gimmick, it's usually a sign of more-honest power ratings.
THX certification is common among
more-expensive receivers.
Higher-end receivers usually offer
A/B-speaker switching or, better yet, true multiroom capability. The most
advanced multiroom receivers let you control not only the volume but also the
source in another room. You might even listen to a different source--say, a CD
in one room and the radio in the other room. A particularly useful new
feature is automatic room tuning and setup. Receivers equipped with this
capability can analyze your speakers and room acoustics, then automatically
adjust for optimum sound quality at the listening position. The most advanced
models utilize highly versatile parametric equalization. Unfortunately,
most Super Audio CD and DVD-Audio players don't provide adequate bass management
for small sub/sat systems, but some of the latest high-end receivers now perform
that function for the players. Bass management is vitally important because it
redirects bass from the satellite channels to the subwoofer.
Those with high-def home theaters will be interested in receivers with HDMI capabilities. In theory, there's a lot to like about HDMI: it's all digital, it has the capability to carry multichannel audio and high-definition video signals on a single cable, and it's small, with a plug that is roughly the same size as USB. Toss in an inexpensive cable or adapter, and HDMI is even backward compatible with its digital video predecessor, DVI. The first wave of HDMI-compatible receivers was hobbled with one compromise or another, but newer models are finally delivering the goods at reasonable price points. If you do go the HDMI route, look for HDMI switching (multiple digital video sources); upconversion of analog sources to HDMI, so your older components will pass video through a single output; and full bandwidth support, the ability to pass surround-sound bit streams and full HD video.
Where will I put all the speakers?
Surround sound requires at least five satellite speakers and a subwoofer, but there are
exceptions to that rule. In this section, we'll go through speaker placement
options and outline surround-sound alternatives that use fewer than six
speakers.
Speaker placement | Do I really need
five speakers and a sub? | Surround
lite
Speaker placement
Before
shopping for speakers, try to imagine where you're going to put them in your
room. Speakers can be placed on floor stands, hung on wall brackets, or placed
on furniture. Subwoofers typically sound best in room corners or near the left-
or right-front speakers. The front three--left, center, and
right--speakers usually sound best when positioned with their tweeters elevated
to the same height as a seated listener's ears. In any case, try to keep the
center speaker near the same height as the left and right speakers.
You can place speakers on shelves or on/in a low cabinet
or entertainment center. Some speakers are better suited to this arrangement
than others. "Acoustic suspension" sealed satellites are the most appropriate.
Next best are ported speakers--as long as the ports are located on the front of
the cabinet. However, speakers with rear-mounted ports won't perform at their
peak when placed inside a piece of furniture. As for the
rear-channel surround speakers, they usually sound best when positioned three or
more feet higher than the front speakers. However, high-fidelity DVD-Audio and
Super Audio CD music will sound best when surround speakers are placed at the
same height (ear level) as the front speakers.
Do I really need five speakers
and a sub?
If you'd rather not deal with the clutter of speaker
cabinets and stringing six or more cables across your room, check out the few
HTIBs that use advanced multichannel speakers to reduce the speaker count to two
or three. Unfortunately, sound quality and surround effects won't replicate true
multichannel speaker systems.
Surround lite
The
dream of wireless high-performance speakers is still unfulfilled, but a few
manufacturers offer "wireless" speakers that receive signals via radio waves or
infrared light--great but they still need to be plugged into the wall for AC
power. Battery-powered wireless speakers just won't cut it in any sort of
quality-oriented surround system.
Speaker packages
Packaged systems take the guesswork out of buying the most important part of any
surround-sound system. We'll go through their component speakers and let you
know what to look for.
Speaker package basics: Front-left and front-right speakers | Center speaker | Surround
speakers | Subwoofer | One-way, two-way, three-way | On-wall speakers | Speaker
connectivity
Front-left and
front-right speakers
You
can choose from miniature 4-inch-tall satellites or move up to hulking tower
speakers. There's a size and shape for every taste. While the best small
speakers can sound awfully good, they produce less bass and have loudness
limitations compared to larger speakers. Full-size, 38-inch-tall or larger tower
speakers frequently offer the best overall sound, though midsize 12- to
15-inch-tall bookshelf speakers may be the best compromise for sound-conscious
buyers who can't accept the visual intrusion of full-size speakers.
Center speaker
The
same logic applies to the vitally important center speaker, which is responsible
for reproducing a large part of your DVD's dialogue, effects, and music. The
smallest 7-inch-wide models are the least visually intrusive but most sonically
compromised.
Surround speakers
A
standard 5.1 system uses a pair of surround speakers, located to the
sides of the main listening position. The newer Dolby EX/DTS ES 6.1
systems add either one or two surround speakers, centered behind the main
listening position.
Subwoofer
Subwoofers
supply deeper bass than satellite speakers. Once again, cabinet and driver size
play a large part in predicting bass quality and quantity. Lower-end HTIB models
are called passive, meaning the receiver's amplifier powers the
subwoofer. Higher-quality subwoofers are powered, as they have their own
onboard power amps.
Every which way
Individual
speakers come in three flavors:
|
1. One-way: woofer only |
2. Two-way: woofer and tweeter |
3. Three-way: woofer, tweeter, and
midrange | Generally speaking, two-way speakers
produce better sound than the one-way designs found on many entry-level HTIB
systems. And three-way speakers usually sound better than two-ways. Some designs
add one or more extra woofers, though multiple woofer, or midranges don't
increase the "ways" of a speaker--a speaker with two woofers, one midrange, and
one tweeter is still a three-way speaker. Multidriver speakers are usually
pricier than speakers with fewer drivers.
On-wall speakers
Low-profile
on-wall speakers are the perfect sonic solution for wall-mounted plasma and
flat-panel TVs. Some models are designed to visually complement wall-mounted
TVs. On-wall speakers can also be a better-sounding alternative to in-wall
speakers. For apartment dwellers, on-wall speakers free up floor space.
Speaker
connectivity
Most
lower-priced speakers use spring-loaded connectors, which may not provide the
most secure grip on the wires. Binding posts are better and work with bare wire
leads, spades (U-shaped connectors), or handiest of all, banana jacks (bowed,
banana-shaped male jacks). You can get banana jacks at specialty audio stores or
your neighborhood Radio Shack.
Some higher-end speakers have biwire
capability--two sets of female connectors. One set of connectors are for the
tweeter, and another set hooks up to the woofer; many cable manufacturers offer
special biwire cables. Biwiring may produce slightly better sound with more
detail and higher-definition bass than the standard single-wire method.
Separate speakers
Cherry-picking the front, center, surround, and subwoofer speakers, you can better select the
solution that meets your precise needs. We'll also let you know how best to
blend your current speakers into a surround setup.
Separate speaker basics: Speaker-matching
Q&A | Front-left and front-right
speakers | Center speaker | Surround speakers | Subwoofers | Getting
wired
Speaker-matching
Q&A
Question:
Multibrand matching--can I use my old speakers and new ones together in a
surround system? Mixing a different brand of surround speaker or
subwoofer with your stereo speakers might be a risky proposition. Center
speakers are the trickiest; mismatching the left-center-right speakers may
result in jarring timbre shifts when the sound is panned across the front three
speakers. Matching surround speakers is less critical, but in any case, try to
arrange a home audition. Question: Unibrand matching--do all JBL
speakers go together? Can I match big towers and small surrounds?
Chances are same-brand speakers of a given vintage will sonically match,
but when in doubt, check with the company's customer service people. And sure,
you can match large and small speakers in one system. Question:
What's the lowdown on subwoofer matching? Matching subwoofer to
satellites is in some ways the easiest chore. The safest bet is to stick with
the same brand. One rule of thumb is to mate small sats with small subs; if the
sats have 4-inch or smaller woofers, better stick with a fairly small sub with
an 8-inch woofer. Larger sats will do their best with larger subs that have 10-
or 12-inch woofers.
What to look for: front
speakers
| If you're going to listen to more music than watch
DVDs, focus your speaker budget on the best left-/right-front speakers you can
afford: 30 to 40 percent of the whole enchilada up front. When the balance
shifts over to more DVDs than music, distribute the budget equally over the 5.1
or 6.1 speakers. |
 |
Infinity Primus
360 |
What to look for: center-channel
speakers
| First, matching the treble/midrange/bass balance of
the center channel to the front speakers is key, and secondly, if the left/right
speakers are fairly large, try to get the largest possible center speaker. Try
not to rely on the sub to provide the bass for the center speaker. Small center
speakers always sound, well, small. |
 |
NHT
SC-1 |
What to look for:
surrounds
There
are two types of surround designs: 1. MonopoleThe
conventional surround speaker looks like a standard satellite speaker. These
monopole speakers aim the sound straight ahead. Most HTIBs and
entry-level speaker packages use this type of surround speaker. They will also
work well in higher-end systems and SACD/DVD-Audio-oriented music-surround
systems. 2. Dipole/bipole
| Speaker with this type of design pushes sound out
to the sides. Their distinctive V-shaped front panels make them easy to
identify. These speakers create a more diffuse surround sound than the
monopoles. They're best suited to DVD movies and less desirable for multichannel
music. |
 |
Dipole
speaker |
What to look for:
subwoofers
| Some subwoofers are better suited to providing
home-theater oomph than musical bass. Home-theater bombast can be more of a
quantity-over-quality issue, but some very "musical" subs lack the gravitas
necessary for maximum home-theater impact. Of course, models that excel on both
tend to be the most expensive. |
 |
JBL
PB12 |
Getting wired
Before
you buy any speaker wire, place the speakers and the receiver in the positions
where they're likely to wind up, then carefully measure the distances. Remember
to measure up and over door frames or windows. Just to be on the safe side, add
at least two extra feet to each cable run; coming up short is no fun, and most
stores won't allow you to return cut-to-length cables. In most cases,
standard zip cord, available in any hardware store, will do nicely. If you need
to run long (more than 20 foot) lengths between the receiver and the speakers,
try to get at least 16-gauge wire (the lower the number, the thicker the wire).
Specialty brands of speaker wire are more expensive but may deliver slightly
better sound quality.
|