XTZ SUB AMP1 DSP User manual

XTZ SUB AMP1 DSP
Subwoofer Amplifier
User manual
© 2009 XTZ AB , www.xtz.se

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Table of contents
Page
Contents
3
About XTZ
4
Technical presentation
5
Preparations
6
Sound philosophy / Installation and placement tips
7
Mounting and connection tips
9
Functional reference
10
uick reference
12
Functions/ Area of usage/ Sound adjustment
13
Technical explanations
21
Technical specifications
23
Service & Support
24

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Contents
Contents
XTZ SUB AMP1 DSP o e
rs a wide range o
possibilities. In order
to utilize your new ampli ier
in the best way,
you should care ully read through
this manual be ore using the ampli ier
or the irst
time. It may take some patience
in order to make
the hi i equipment sound optimal.
I you have no previous experience o these kinds o
installations, or i you have any questions, eel ree
to contact our ree o charge support and we will
help you. (See urther under the heading o
Support on the last page o this manual).

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About XTZ
Philosophy
Our re erence and starting point is to reproduce
a
natural sound, but also in respect to the act that
acoustics always is a matter o personal taste.
XTZ Goals To provide the optimal relation
between price, perform
ance and quality
on the market.
Our concept:
- To produce the per ect compromise.
- Cost-e ective manu acturing in large volumes.
- Our priority is product quality be ore marketing,
so the customer should get the best ratio o price
and quality.
- Reduce the number o middlemen.
Contact us
Website: www.xtz.se
E-mail: [email protected]

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Technical presentation
SUB AMP 1 DSP
works just as good or those who
want to power the passive subwoo ers (XTZ 99
W10.17P) or any other subwoo ers. SUB AMP1
DSP
can be per ect as an ampli ier or bi-amping
ull
range speakers.
By using one or two subwoo ers (with correct
placement), it is o ten easier to achieve
a better
requency response. SUB AMP1
DSP gives you
valuable bene its when struggling with the roo
m
modes.
Why buy an active
Amplifier with
integrated DSP?
Finding an acoustically acceptable
listening room is
o ten hard
. Normally you can not change your
living room that much and you need to accept a lot
o losses in the sound quality. This is
a known act,
but many brands do not touch this
issue because it
is not easy to solve this problem with traditional
analogue technology.
It’s impossible to construc
t a normal analogue
subwoo er that sounds per ect in every room.
Every room has unknown and
unique acoustical
characteristic that a ect
the sound quality. The
biggest problems are ound in the low-
requency
spectrum. A regular (not
acoustically treated) room
has severe resonances and dips in this
spectrum
caused by so called standing waves. Depending
on
listening positions they pro
duce severly
unbalanced sound.
The requency response o a good loudspeaker
should be in the range o ±
3dB, but a normal room
can introduce
variations o ± 15dB. This leads to
the conclusion that even a very good
loudspeaker
can per orm poor in a "bad" room.
And the act is
that most regular rooms su er rom
acoustical
problems.
To build a per ect listening room is extremely
expensive.
With the DSP technology we can create a good
balanced sound in every room.
Amplifier
We have equipped the XTZ SUB AMP1
DSP with a
very power ul 300 watt ampli ier
and a large heat
sink
or e ective cooling. For pro essional use
(studio, PA etc.), it is equipped with a balanced
input. The terminal connectors are gold-
plated and
very solid.
To achieve a high power and
long durability, the
ampli ier is built with a large ring-
coil trans ormer,
large electrolyte capacitors, and has
MosFet
transistors in the output stage .
DSP
The built-in DSP module is equipped with 24
-
bit/96-
kHz AD/DA converters and the best
so tware on the market today allowing you per ect
adaptation o the subwoo er to the room
characteristic and adjustment o the
sound
character, always maintaining the
best possible

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quality o sound.
In order t
o provide the highest sound quality the
DSP runs advanced low-
noise ilter algorithms with
32-
bit calculation precision. The so tware consists
o parametric and graphic equalizer, phase
correction, low-cut and high-cut ilters, and delay.
There are many "cheap
" equalizers on the market,
but most o them
are not good enough to maintain
the high sound quality or low requencies because
o using not appropriate algorithms. The DSP
so tware used in the subwoo er has been developed
by a world leading German company with 25-
years
tradition in pro essional audio.
There are many years o development b
ehind the
so tware we use in SUB AMP1 DSP.
The cabinet
The cabinet is made o MDF.
The sur ace is
varnished, black piano paint, giving it
a proper
look.
Preparations
Unpacking
Care ully unpack the speaker, and pay attention so
you don't break anything. I possible, save the
packing box or uture transportations. I there
should be any damage on the product
, please
contact your retailer.
C
heck that the mains voltage marking on the back
panel matches your local mains voltage.
I the product is cold, wait until
it reaches room
temperature be ore connecting the power cord
. I
you don’t do this you can cause damage o the
product.
Accessories
Mains power cord
User manual
Logotype
Rubber eet
PC-Remote
PC-Remote is a so tware, allowing you to control
SUB AMP1 DSP rom a PC.
You can sit in listening position and do all settings.
The program is included in price, but you need
to
download the so tware rom www.xtz.se

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Sound philosophy / Installation and placement tips
This chapter contains common in ormation on
loudspeaker placement and installation.
These are general rules, so there are exceptions.
In which room do
you achieve the best
sound?
No matter how good the equipment is, in the wrong
listening environment it will inevitably sound bad.
There are some basic rules concerning a proper
loudspeaker installation:
Reflections
Carpets, curtains and so t urniture absorb mid
range and high requency sound, and this is
pre errable. Big empty area
s, on the other hand,
re lect it and produce
hard re lections that may
lead to a
blurry dialogue. Apart rom colouring the
sound, also the perspective o the sound will
deteriorate. Re lections in the room can roughly be
compared to the re lections that yield ghost
pictures on a TV screen.
Amplification of bass
frequencies
A loudspeaker that is placed near a wall, ce
iling or
loor will ampli y lower requencies in a sometimes
not desirable way (since it may lead to an indistinct
sound recreation). This ampli ication becomes even
more obvious i the loudspeaker is placed near a
corner. Thus, or a sound as clear as pos
sible, the
loudspeaker should be placed at least 30 cm (about
12 inch) away rom the wall
Some constructions are made to be placed closed to
a wall.
Room dimensions
Quadratic rooms or rooms where the length is
exactly twice as long as the width sho
uld be
avoided, since they may create unwanted
resonance.
Furniture
Be aware that urniture may vibrate and thus create
bad sound at loud bass.
Front speakers
To get the best result the ront speakers should be
placed symmetrical in ront
o the listener. The
distance between the ront speakers should be
around 80% o the distance to the listener. In other
words, the recommended angle between the ront
speakers should be 45°
Angling?
Either you can have the loudspeakers angled in
towards the listener or you can have them directed
straight ahead. Some loudspeakers sound
better
when angled, but this may also depend on
re lections rom the side walls. By angling the
loudspeakers inwards, you decrease unwanted
re lections and thus you
get a better stereo
perspective.

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Placement of the
subwoofer
The placement o the subwoo er in the room
dramatically a ects the overall requency response
and sound level o the system. At low requencies
the e ect o the room is strong. Even a
slight
change in the subwoo er's location can make a
signi icant di erence in the requency balance.
Patience and methodical experimentation is needed
to ind an optimal placement. The placement
a ects the phase di erence between the main
loudspeakers and the subwoo er.
One basic rule is to place the subwoo er together
with or near the ront system (especially important
i the ront loudspeaker also propagate bass
requencies) as this will minimize the risk o phase
eliminations in the room.
The correct height
I the loudspeakers are small, they should be placed
on stands or tilted so that they are on the same
level as the ears.
Cables
Try to keep them as short as possible. By its
electrical parameters, a long conductor will have a
bigger in luence on the sound than a short one.
The subwoo er cable should be shielded, to avoid
noise.
Make sure that all connections are clean and not
oxidised. All connections should be mechanically
stable, both power, signal and loudspeaker cables.
Signal
cables should be separated rom other
cables.
Finally
Please remember that good sound is a matter o
taste, so you have to experiment to obtain your
avourite one. We wish you best o luck!

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Mounting and connecting tips
Mounting
alternatives
SUB AMP1 DSP
is constructed to be placed lying
down or standing up.
Place the logotype in same
direction as SUB AMP1 DSP
Mount the eet on the side you want to be
down.
Connect using the
correct phase
Always connect using the correct p
hase, rom the
+-pole on the ampli ier to the +-
pole on the
loudspeaker and corresponding or minus (-).
I you by accident connect the other way,
there is no risk o damage. However, the
sound will not be correct, especially in the
lower requencies.
Overload
With high power load under long time there is risk
o overloading the driver and/or the ampli ier.
I you play extremely
loud or a long time
there is a big risk that you destroy the
product.
Load
We recommend that no more than 2pcs o
8 Ohms
subwoo er should be connected to SUB AMP1 DSP.
This is because the impedance could be
extremely
low.

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unctional reference
Rear
panel
1. Input gain meter
2. Standby indicators
3. LCD display
4. Function button
5. Value buttons
6. IR port
7. Contrast adjustments or
LCD Display
8. Volume knob
9. Balanced input
10. Ground select
11. Low level input
12. RS-232 PC connector
13. Input selections
14. High level input
(speaker input)
15. Power connector
16. Mains switch
17. Voltage select
18. High level Output
1 Input gain
INPUT GAIN METER
Indicate the input level.
Should be as high as possible but without
getting the red INPUT GAIN diode
lashing; this gives the best signal/noise
ratio.
2 Standby indicator
Turns red in standby.
Turns blue when the subwoo er is ON.
3 LCD display
LCD Display that shows all unctions and values.
4 Function button
FUNCTION
Select unction with this two buttons.
5 Value buttons
VALUE
S
elect value with this two buttons to adjust the
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