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and with far less heat than conventional amps—a key factor in the HD
subs' sleight of hand.
The fi nesse was a little bit harder. By creating highly specialized
low-frequency drivers of exceptionally high mass and extraordinary
"pumping" ability (thanks to extremely long-excursion cones and
remarkable power-handling and linearity), PSB had the fi rst element of
the equation. The remainder is found
in the tiny, exhaustively computer-
modeled HD8 and HD10 enclosures,
and in their dual-opposed high-mass
passive radiators.
A passive radiator – essentially
a large, massy, motor-less cone
diaphragm
with
specialized
suspension – replaces the port in
a vented or "bass-refl ex" speaker
design
(generally
the
lowest-
distortion subwoofer option). In
our "small, deep, loud" engineering
conundrum,
as
we
make
enclosure smaller, the port must also
shrink to maintain the same deep-
bass extension. But at the optimum
port diameter, length must grow,
via labyrinthine internal ductwork
that for true extension necessitates
six or eight feet or more of length.
Effectively requiring more internal
volume than a small cabinet affords
– and forget about room for driver,
amplifi er, or controls – this presents
a bit of a problem. The PSB HD
subs' dual passive radiators crack
this dilemma. Carefully calculated
to complement each model, they
tune the HD cabinets to frequencies
similar to that of much larger enclosures.
There's more. PSB's dual-opposed high-mass passive radiators achieve
unprecedented excursion in their own right—as much as two inches
peak-to-peak—in order to preserve output down to the very lowest notes
and deepest sounds. Their progressive suspension preserves near-
perfect motion, and thus low-distortion clarity, at all frequencies and
drive levels. And by arranging the dual passive radiators on opposing
cabinet faces, unwanted vibrations are cancelled and more energy is
launched out into the room as deep bass—and the HD8 and HD10 are
rendered much less likely to shake and "walk" across a hard fl oor, as
some well-known sub-compact subs are known to do. (To inhibit any
residual such tendency, PSB developed special compliant feet that keep
the HD subs in place on any surface, even marble fl ooring.) Extra-heavy-
duty aluminum cast woofer "baskets," oversized magnet structures, and
large-diameter, ultra-high power voice coils are just three more elements
that empower the HD8 and HD10 to churn out musically accurate low
frequencies — and to continue to do so for years to come.
www.psbspeakers.com
S p e c i f i c a t i o n s
Frequency Range
On Axis @ 0°±3dB
LF Cutoff -10dB
Input Power
Continuous
Dynamic, Peak
Acoustic Design
Woofer (Nominal)
Crossover
Design Type
the
Net Dimensions
(W x H x D)
Gross Dimensions*
(W x H x D)
Weight
Net
Shipping
Finish
Features
* Gross dimensions include volume knob / speaker terminals / connectors / feet / grilles.
Note: Installers should allow a minimum clearance of 2 - 4 inches for wire management.
1 888 772 0000
No part of this publication may be reproduced, stored or transmitted in any form whatsoever without the written permission of PSB Speakers. 611 SubSeries HD Data.
Music First
The HD models' bantam size and impressive power and deep-bass
extension are not the whole story, however. PSB adamantly believes that
music remains the truest test, and thus will not sacrifi ce accuracy to fi rst
impressions. Rejecting the hyped-up response by which many smaller subs
disguise a dearth of true low-frequency ability, the HD models' focus, like
that of all PSB subs, is honest, controlled, musically accurate low bass.
HD10
HD8
Ultra-Compact
Ultra-Compact
Powered Subwoofer
Powered Subwoofer
30-150Hz
35-150Hz
33Hz
28Hz
(Internal Amplifier)
(Internal Amplifier)
500 Watts
750 Watts
1000 Watts, 2000 Watts
800 Watts, 1600 Watts
1 x 10" (250mm)
1 x 8" (200mm)
2 x 10" Passive Radiator
2 x 8" Passive Radiator
Polypropylene Cone
Polypropylene Cone
Variable 50-150Hz,LR4
Variable 50-150Hz,LR4
Low Pass Filter
Low Pass Filter
Passive Radiator
Passive Radiator
10 1/2 x 10 1/2 x 10 1/2"
12 x 12 x 12"
(305 x 305 x 305mm)
(267 x 267 x 267mm)
11 x 11 5/16 x 11 5/8"
12 9/16 x 12 13/16 x 13 1/8"
(279 x 287 x 295mm)
(319 x 325 x 333mm)
38.0 lb (17.2kg)/each
25.0 lb (11.3kg)/each
45.0 lb (20.4kg)/each
30.0 lb (13.6kg)/each
Satin Black
Satin Black
Rear mounted volume,
Rear mounted volume,
crossover & continuously
crossover & continuously
variable phase controls,
variable phase controls,
Auto on/off, LFE input/
Auto on/off, LFE input/
output, LL Stereo in/out,
output, LL Stereo in/out,
HL Stereo in with 5-way
HL Stereo in with 5-way
gold plated binding posts,
gold plated binding posts,
12V Trigger
12V Trigger
Why "HD"?
Contrary to what you might guess, the "HD" in HD8 and HD10 does not
denote "high defi nition"—though their eminently musical low-frequency
performance certainly qualifi es. Instead, it stands for "high density." If you
took a PSB HD sub apart (please don't!) you would fi nd that its driver, dual-
opposed high-mass passive radiators, and power-amp/electronics modules
interlock to virtually fi ll the tiny enclosure's interior, much like one of those
carved wooden puzzles that seem so simple yet only fi t together in one
precise, brain-stretching fashion.
While the HD Subwoofers' technical details may be of interest mostly to
engineers, their results should be obvious to all: Deep, powerful, high-
impact reproduction of even the most challenging soundtracks and musical
performances—all from subwoofers with an ultra-compact footprint. Real-
world musicality that's second to none. Virtually unlimited extension to the
very threshold of audibility. And mind-bending, solar-plexus-massaging
bass.
© 2007 PSB Speakers, a division of Lenbrook Industries Limited. PSB is a registered trademark of Lenbrook Industries Limited.
Like their bigger PSB cohorts, they
exploit "intelligent" amplifi ers with
sophisticated circuitry that helps
match each sub's drivers, enclosure,
and electronics into a balanced system.
The result? Controlled, "quick," impact-
rich sound extending to the very lowest
octaves, without the boom or bloat of
all too many compact woofers.
Lastly, PSB recognizes that even the
largest, most powerful subwoofer will
someday encounter its limits—sooner
rather than later, if there's a teenager
involved. Thus, like virtually every
maker of serious subwoofers we design
in electronic monitoring and controls.
The PSB HD8 and HD10 are among the
industry's "smartest," with rigorously
modeled algorithms that match each
model's capabilities, and that are
shaped to follow statistical models of
actual music and fi lmsound rather than
test tones. Like all such well-designed
circuits, PSB guards the HD models
from undergoing dangerous overdrive
or producing obvious distortion; unlike
most, they do so without crushing
the dynamic subtleties from music, or
compromising the thunderous impact
of big-action fi lmsound.
PSB Speakers reserves the right to change specifications or features without notice.
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