Jamo E-7 Brochure

Technical Description

Jamo E 7 system

Version 1.0

Technical Description

Jamo E 7 System

Contents:

1. General system description

2. The products:

2.1. E 700

2.2. E 750

2.3. E 770

2.4. E 7CEN

2.5. E 7SUB

3. Driver explanation

3.1. Tweeter

3.2. Midrange/Woofers

3.3. (Sub) woofer

4. Cabinets

5. Technical specifications

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1. General description

The goal with our new E 7 series loudspeakers has been to bring audiophile quality
loudspeaker technology to the mass market. Furthermore our requirement from the start
has been that this new series should perform equally well with music as movies and have
the eye pleasing aesthetics that allow most people to integrate these loudspeakers in their
everyday living rooms without sacrificing their interior decor. A task that proved to require
new and ingenious solutions as well as ground breaking technology from our EISA award
winning D 7 series.

These are loudspeakers designed by engineers with a
passion for music in all its forms. Anybody who listens to
these designs will hear that. We wanted this new range to
exceed all sonic expectations in the class… we think that’s
exactly what it does.

One of the biggest challenges when designing speakers is
preventing unwanted cabinet vibrations from clouding or
colouring the sound. High frequencies are particularly
susceptible so we came up with the first ingenious
solution… Decoupled Tweeter Technology (DTT).

By decoupling the tweeter from the rest of the
loudspeaker, vibrations transmitted from the front baffle to the tweeter are reduced by
more than 20 dB resulting in
an uncommonly detailed and
realistic reproduction of high
frequencies.

Firstly the tweeter is
decoupled from the
aluminium front baffle using a
special rubber compound
called EPDM (Ethylene
Propylene Diene Monomer)
which has extremely good
acoustical properties.
Secondly the aluminium front
baffle is not just screwed onto
the wooden front baffle but
mounted using natural rubber
rawlplugs which further

Difference between vibrations in a normal front baffle and vibrations
in a front baffle employing Decoupled Tweeter technology.

prevents vibrations being
transmitted.

The loudspeaker cabinets themselves are constructed from solid MDF and the front baffle
is angled by 2 degrees in order to further enhance the rigidity of the cabinets. The two
floorstanding models in the range also have internal bracings adding further to the
structural stiffness of the whole construction. Please refer to section 4 for more information
about the cabinets.

Exploded view of the Decoupled
Tweeter Technology.

Wooden front baffleWooden front baffle

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