Technics SB 4500 Brochure

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Technics 33-4500

"Linear Phase 2-Way Speaker

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33-4500 Linear Phase 2-Way Speaker System

Musical Realism in a Top Value System

The amazing waveform fidelity of the
Technics Linear Phase speaker systems
is now almost legendary. Here, with the
SB-4500, comes a similar system-priced
to suit the economy-minded. Yet it still
retains the essential crisp transparency
of sound all the way through the audio
spectrum. As our oscilloscope tests have
shown, sound-pressure waveforms of
musical instruments played through the
Linear Phase system mirror almost exactly
the original waveforms. The result is a
real sense of being there, inside the
concert hall. Naturally, this technological
achievement came only after months of

patient research by teams of dedicated
audio scientists. And one of their major
successes was the development of a
special phase measuring device which,
for the first time, allowed precise
measurement of phase delays. The result,
as you will hear, is an incredible
transparency and clarity of sound, with
all the verve of a live performance. Now
we are able to offer you this Linear
Phase sound at an economical level, yet
without sacrificing any musical vitality.

If youre serious about musical realism,
you owe it to yourself to give the SB-4500
a hearing!

Bass-Reflex 2-Way Speaker System with 25cm (10) Woofer
and 60m (2%) Cone Tweeter in Linear Phase Configuration

A new crossover unit, specially designed
for this Linear Phase system, ensures that
accurate waveform fidelity, with
corresponding realistic reproduction, is
maintained. The crossover point is at

2 kHz. This network is designed for

linear overall phase characteristics,
including the individual speaker units. The
units are designed for exceptionally wide
frequency range and high performance,

in ideal physical configuration.

Extra Wide-Range Woofer

With a specially corrugated cone made
from selected types of pulp which
combines lightness with strength, the
frequency range extends to 4 kHz, leaving
the critical midrange frequencies free
from partial vibrations, with low distortion.
The voice-coil bobbin is of hardened
aluminum foil, providing excellent heat
dispersion in high power operation.

Wide-Range Edgeless Cone Tweeter

A newly-developed synthetic resin
prevents air-leakage and supports the
cone with high compliance. The edgeless
structure eliminates edge resonance and
so reduces distortion. The voice coil is
made of copper-clad aluminum wire for
exceptional conductivity and heat disper-

SB-4500 Square Wave Responses

sion. Response extends up to 28 kHz, with
an fo at a low 350 Hz, giving the tweeter
the ultra-wide range which is essential
for linear phase response. The newly-
designed crossover network provides
perfect smoothness and tweeter/woofer
balance, with linear phase. Crossover is
so smooth, in fact, that the unit sounds
more like a single, wide-range speaker.

Optimum Speaker Location

By precisely aligning the acoustic centers
of the speaker units and placing them
physically as close together as possible
(while keeping them acoustically isolated),
our engineers have succeeded is produc-
ing the maximum phase linearity with even
sound distribution. Moreover, the location
of the units is finely tuned to compensate
for phase shift at the crossover network.
You will notice that the woofer is placed
well away from floor level to reduce boomy
floor effects.

High Power, High Efficiency Bass Reflex
Design

The SB-4500 is perfectly at ease handling
peak power up to 75 watts. And the high
92.5 dB/W.m efficiency still gives ample
volume even at low power. The surprising-
ly rich, solid bass response is provided

by a carefully tuned bass-reflex cabinet.

Technical Specifications

Configuration 2-way 2-speaker bass

reflex
Impedance 6 ohms
Instantaneous maximum
input power 75W (peak

Output level

)
92.5 dB/W (1m)
Speaker units )

Woofer: 25 cm (10
cone type
Tweeter: 6 cm (2%)
cone type

External dimensions 350 x631 x325 mm

(WXHXD) (13%x24%x12%)
(including grille)
Net weight 14.5 kg (32.0 lbs.)

Note 1: The instantaneous maximum input
power quoted above is for a voice-coil
temperature rise to not greater than 80°C
(176°F), which corresponds to the
conditions of measurement.

Note 2: System supplied with grille cloth
as shown on front page.

Sound Pressure and Phase Characteristics

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Directional Dispersion, Harmonic
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Technics

Matsushita Electric

SDGOOBEF

Specifications subject to change without notice. Printed in Japan