JAMO E 850, E 870, E 800 User Manual

Item no.

69479

22.01

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Type...............................................................E 850

System..................................2½ Way Bassreflex

Woofer............................................5½ / 140 mm

Midrange.......................................5½ / 140 mm

Tweeter...............................................1 / 25 mm

Power handling*.......................140W / 200W

Frequency range...................37 - 20.000 Hz

Impedance................................................6 Ohm

Dimensions....................862x175x341mm

33,9x6,9x13,4in

Weight.......................................15,3 kg / 33,7 lb

Type...........................................................E 870

System.....................................3 Way Bassreflex

Woofer......................................2 x 5½ / 140 mm

Midrange.............................5½ / 140 mm

Tweeter..............................................1 / 25 mm

Power handling*........................150W / 220W

Frequency range...................32 - 20.000 Hz

Impedance................................................4 Ohm

Dimensions...................1011x175x361mm

39,8x6,9x14,2in

Weight........................................19,3 kg / 42,5 lb

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Specifications subject to technical changes.
*Long / Short term power, According to IEC 268-5.

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www.jamospeakers.com

E 8

Advanced Owners Manual

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Congratulations on your choice of the
Jamo E 8 series.
The idea behind the Jamo E 8 series,
was to make a complete series of
naturally sounding speakers for hifi
and surround sound.
You will no doubt be anxious to listen
to your new loudspeakers.
We do, however, recommend that, to
benefit fully from your investment, you
adhere meticulously to the instructions
for connection and placing in this
users guide.

The slimline cabinets all feature heavy
and resonance dead 19 mm MDF board
front baffles giving optimum working
conditions for the drivers.
On the floorstanders the cabinets are
made of 22 mm particle board and on
the small speakers of 19 mm particle
board.

The treble is reproduced by a 1"/25 mm
carefully coated textile dome tweeter.
The tweeter features magnetic
ferrofluid and a voice coil wound of
thermosetting wire on an aluminium
voice coil former, for high power hand­ling.

This driver is a completely new unit ­specially designed by Jamo.
The most conspicious about it is the
very wide surround that covers the
entire basket, the centerplug and the
mineral fibre reinforced pressed cellu­lose diaphragm.
When using a centerplug, a dust cap is
no longer needed.
By removing the dust cap, radial
diaphragm break ups around the dust
cap mounting point are eliminated and
so is under-/overpressure, created
from the diaphragm excursions, behind
the dust cap.

Construction

Introduction

Cabinet

Tweeter

Mid/woofer

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The magnet used is 25% thicker than
conventional for this type of driver.
The reason for this, is that we wanted
to use a 15 mm long 2 layer voice coil
to achieve higher maximum sound
pressure level and reduce distortion
caused by unlinearities in the motor
system.

This new high flow design secures less
turbulence and compared to a normal
port, it allows 5 dB higher SPL before
port noise occurs.

It is recommended to use the spikes
provided. These ensure that,
regardless of the base, the loudspeaker
will stand steady with a good mechanical
contact to the base.
If the base is hard (for instance wood or
stone), the rubber feet provided may
be mounted.

NOTE: When spikes are fitted on the
loudspeaker, never drag or push it
across the floor, as this is likely to dam­age both carpets and floorboards.

Use of spikes (E 850/E 870)

Jamo Convex Tapered Vents.

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Placing

The placing of the speakers in the
listening enviroment have a huge
influence on the sound reproduction.
On fig. 1 and 2 we have given some
guidelines, which under normal
circumstances will give an optimum
result.

It is always recommended that you
experiment with the placement, until
you find the sound reproduction
perfect.

Fig. 1

Fig. 2

Fig. 3

Removing the fabric front.

In general, a fabric front always has an
influence on the soundreproduction ­and it is typically the detail repro­duction in the high frequency area that
is effected. It is therefore recommended
that the fabric fronts are removed
during serious and critical listening
situations. This will give you the
maximum benefit of your loudspeakers.

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Connection

A general rule is that the longer a cable
is the better quality cable should be
used, to avoid loss of sound quality in
the cable. Therefore: never use longer
cable than necessary, but preferably
the same length to each speaker.

The connection of speakercable is done
as follows:

1. Turn off the amplifier

2. Carefully remove approx. 10 mm of
the insulating material - beware not
to damage the conductors!

3. Twist the conductor ends

4. Turn the terminal screws counter­clockwise until the conductors can
easily be inserted into the holes

5. Turn the terminal screws clockwise
until the cables are secured in the
terminals

To avoid damage on the amplifier,
never short-circuit the plus (+) and
minus (-) wire.

Your Jamo dealer can give you

advice on which cable to use.

Cable

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Never use:

Fig. 4

Always make sure that:

MAINTENANCE

Single Wiring

Bi-wiring

E 800, E 850 and E 870 are equipped
with bi-wiring terminals. Bi-wiring gives
you the possibility to fine tune the
sound with special cables.
In the following the use of bi-wiring is
described. Ask you Jamo dealer for
advice, on how you can take advantage
of the bi-wiring terminals.

The speakers are delivered from Jamo
with the bridges (fig. 4) mounted for
single-wiring. Then connection is as
shown on the previous page.

If you use bi-wiring, always remember
to remove the bridges between the
two sets of terminals.

At the amplifier the cables can be
gathered in one set of output terminals

You can also use two amplifiers. (Bi­amping)

the speakers are in correct phase:
That is that the + and - cables are
connected identically both on the spea­ker and the amplifier. To make it easy to
make sure that the phase is correct, one
of the wires usually is marked.

All Jamo loudspeakers are
manufactured in modern, thoroughly
tested materials which usually require
no other maintenance than vacuuming
or wiping using a soft, dry cloth.
If the loudspeakers have become
greasy, clean them using a cloth
moistened with water or possibly a
mild detergent.

Scouring powders, benzine, spirit or
other solvents to clean the
loudspeakers.

Terminals