Perreaux Headphones Silhouette SXH2 User Manual

Silhouette SXH2  
Headphone Amplifier  
Owners Manual  
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Perreaux Industries Limited makes no warranty for the use of its products, other  
than those expressly contained in the warranty detailed herein. The Company  
assumes no responsibility for any errors which may appear in this document,  
reserves the right to change products or specifications detailed herein at any time  
without notice, and does not make any commitment to update the information  
contained herein. No licenses to patents or other intellectual property of Perreaux  
are granted by the Company in connection with the sale of Perreaux products,  
expressly or by implication.  
mboob^ru® is a registered trademark of Perreaux Industries Ltd.  
Terms and product names in this document may be trademarks of others.  
1
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i
Introducing the  
Perreaux Silhouette Series  
Designed as a range of high quality, yet affordable modules; the  
‘Silhouette’ series will compliment and enhance your existing  
system.  
Drawing on our extensive knowledge gained from more than a  
quarter of a century of developing highest quality audio products,  
the ‘Silhouette’ concentrates our legendary design and build  
quality into a compact package without sacrificing performance.  
The Perreaux ‘Silhouette’ series provides performance levels  
never before seen in its class.  
Key Features  
Class A signal stages  
Highest quality internal power supply featuring a custom  
designed, fully shielded toroidal transformer and 22000µF  
of smoothing capacitance  
Optimal internal layout incorporating total separation  
between channels  
Enhanced audio design featuring highest quality PCB and  
minimal internal wiring  
Gain selection switch  
Line-out connections  
High power output  
Stable down to 4  
Dual stereo headphone jacks  
Compact  
Stylish  
The Perreaux “Silhouette” series takes you even closer to the  
elusive goal of “The Perfect Re-Creation of a Musical  
Event”.  
From all of us at Perreaux Industries Limited, thank you for  
choosing the Perreaux Silhouette Series SXH2 Headphone  
Amplifier.  
2
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ii  
Important Safety Instructions  
Note:  
Please read all instructions carefully before attempting to  
operate your Perreaux “Silhouette” SXH2 Headphone  
Amplifier.  
ALWAYS switch off power to your system before attempting to  
connect or disconnect cables.  
ALWAYS disconnect your system from the mains before  
attempting to clean your unit.  
ALWAYS keep electrical equipment out of reach of children.  
ALWAYS unplug sensitive electronic equipment during  
electrical storms.  
NEVER disconnect the mains earth from the system.  
NEVER operate the SXH2 with the cover removed.  
NEVER use any liquid inside the SXH2.  
NEVER bypass any fuse.  
NEVER attempt to repair the SXH2. In the event of a problem,  
please contact your Perreaux dealer.  
NEVER expose the SXH2 to extremely high or low  
temperatures.  
NEVER operate this product in an explosive atmosphere.  
3
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iii  
Table of Contents  
i
Introducing the Perreaux Silhouette Series .................................... 2  
Important Safety Instructions............................................................. 3  
Table of Contents .................................................................................. 4  
Unpacking and Placement .................................................................. 5  
Instant Install.......................................................................................... 6  
Front Panel Functions .......................................................................... 8  
Rear Panel Functions ............................................................................ 9  
Special Design Philosophies..............................................................11  
Special Design Features .....................................................................13  
Care and Maintenance .......................................................................15  
Warranty Information ........................................................................16  
Extended Warranty Registration Form..........................................17  
Troubleshooting Guide......................................................................18  
Specifications........................................................................................20  
Physical Dimensions............................................................................23  
Contact Details.....................................................................................24  
ii  
iii  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
4
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1
Unpacking and Placement  
Unpacking The SXH2 is packaged for maximum protection. To open, sit the  
Procedure box upright and cut the reinforced tape at the top of the box. The  
product can now be removed.  
Pull the foam protecting end-caps off either side of the unit and  
remove the black material covering.  
The SXH2 Headphone amplifier is now unpacked and ready for  
further installation.  
Note:  
Please retain all packaging material for future transport.  
Box 1 x SXH2 Headphone amplifier  
Contents 1 x Product manual  
3 x Performance analysis charts  
1 x Detachable AC power cord  
Placing Your The SXH2 should generally be placed close to your source  
SXH2 equipment, thus keeping interconnect cabling between the SXH2  
and associated components as short as practical. This will reduce  
the systems susceptibility to radio frequency interference and the  
negative effects associated with long cables.  
Ventilation The SXH2 is a low power amplifier. Ventilation requirements  
Requirements are not considered an important factor in product placement.  
In the event that the SXH2 is to be incorporated into custom  
cabinetry, please refer to the dimensional information provided in  
the Physical Dimensions section of the manual (Chapter 12).  
5
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2
Instant Install  
If you are like us, the first thing you will want to do is to play  
your favourite piece of music through your new SXH2. The  
following instructions are written to enable you to achieve this as  
quickly as possible. These are not comprehensive instructions,  
but are designed to enable you to play music now!  
Note:  
Please take the time to read the SXH2 manual thoroughly  
as it incorporates many features, which will enhance its  
operation.  
Placement  
The SXH2 is a sensitive low power amplifier and best results  
will be achieved when placed away from potential interference  
from other components and electrical devices, for example AC  
mains cords/outlets, transformers, high power amplifiers,  
computers, etc.  
Place the SXH2 close or near the source component in order to  
make as short a connection as possible.  
Turn off associated components  
This minimises the potential to damage any other components  
when connecting your SXH2 into the system.  
Connect source to SXH2  
Connect the audio output from the source component to the  
inputs at the rear of the SXH2. Refer to Chapter 4 for Rear Panel  
information.  
Connect headphones to SXH2  
Connect a set of headphones to one of the jacks on the front  
panel. Refer to Chapter 3 for Front Panel information.  
Note:  
Make sure the nominal impedance of the headphones is  
not lower than 8.  
Switch on SXH2  
Insert the power cord supplied into the rear of the SXH2 and into  
the wall. Switch on the socket at the wall and turn on the power  
of the SXH2 by setting the power switch down.  
6
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Caution!  
Prior to connecting the AC mains, please check the voltage  
label on the rear panel to ensure that your unit conforms to  
the power supply in your area. Never attempt to connect  
the unit to the incorrect voltage.  
Switch on source component  
Power up your source component and start your favourite  
recording. Slowly increase the SXH2 volume to achieve a  
comfortable listening level.  
CONGRATULATIONS!  
Now that you have achieved your first objective, sit back, relax  
and please read the rest of the manual at your own pace in your  
favourite armchair whilst sipping a hot cup of coffee. You’ll find  
the whole experience much more pleasurable whilst listening to  
music.  
7
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3
Front Panel Functions  
Power LED  
This blue LED indicates the power status of your SXH2  
headphone amplifier.  
Headphone Jacks  
Two 6.35mm (¼”) stereo headphone jacks are provided,  
allowing a second person to enjoy the pure sound offered by the  
SXH2. The construction of the jacks makes for effortless,  
crackle and pop-free insertion, and will give a lifetime of  
continuous contact performance.  
Note:  
Please ensure that the resulting impedance of the two  
headphone sets is not below 8. Use the following  
equation to calculate the total impedance: RT = (R1 * R2) /  
(R1 + R2).  
Volume Control  
The high-quality, machined aluminium knob is the sole user  
interface, reminding the user at every touch of the superior build  
quality designed into the SXH2. Volume control motion is  
smooth and accurate, providing absolute control with near  
infinite gain resolution.  
8
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4
Rear Panel Functions  
Right and Left Line Inputs  
Input from source component, accepts a standard unbalanced  
input (RCA). The left channel connection is on the right when  
looking from the rear, indicated by white inner ring. For more  
information on input specifications, please refer to Chapter 11.  
Gain Selection Switch  
Select HIGH gain or LOW gain to provide the best possible  
volume range for your particular headphones, enabling the  
optimum listening level to be achieved.  
Serial Number/Voltage Label  
The serial number is unique to your SXH2. Please record this  
number and store it in a safe place. For any service related  
enquiry, please be prepared to quote the product serial number to  
Perreaux personnel or their service representative.  
The voltage displayed in this area is the ONLY voltage that can  
be accepted by the unit.  
Caution!  
Never attempt to connect the unit to the incorrect voltage.  
On/Off Switch  
When operating the switch down, power is applied to the SXH2.  
9
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AC Mains Input  
An IEC-standard mains input is provided at the rear of the unit.  
The AC cord set is removable, allowing it to be upgraded at your  
will.  
Right and Left Line Outputs  
Line level output, accepts a standard unbalanced input (RCA).  
The left channel connection is on the right when looking from  
the rear, indicated by white inner ring. For more information on  
input specifications, please refer to Chapter 11.  
10  
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5
Special Design Philosophies  
Perreaux has been designing and manufacturing only the highest  
quality audio componentry for more than a quarter of a century.  
Technology has continued to evolve rapidly over that time and  
our knowledge and application of design, materials and  
manufacturing techniques has advanced in tandem with this.  
Today’s Perreaux range comes closer to fulfilling our shared  
vision than at any other time in the past.  
The SXH2 has been developed to meet customer demands for  
compact higher quality products. Careful attention has been  
taken throughout the development phase, not to make  
compromises that would degrade the high quality of reproduction  
that the unit is capable of delivering.  
To follow is a discussion on some of Perreaux design  
philosophies that have been incorporated into the entire range.  
Minimalist Leading British architect, John Pawson, writes:  
Design  
The Minimum can be defined as the perfection  
that an object achieves when it is no longer  
possible to improve it by subtraction. This is the  
quality that an object has when every component,  
every detail, and every junction has been reduced  
or condensed to the essentials. It is the result of  
the omission of the inessentials”.  
Perreaux has historically embraced the minimalist ethic from an  
audio design perspective only. The concept of “less equating to  
more” has been at the heart of all Perreaux audio designs for  
more than a quarter of a century. Our current product offering  
takes the minimalist ethic to new levels by totally embracing the  
concept.  
Minimalist Electronics  
We wish to maximise the quality of your listening pleasure by  
keeping the componentry and signal path as uncluttered, short  
and clean possible. All components in the signal path, even those  
of the highest quality have an effect on the signal, thereby  
altering the quality of the reproduction in some way. Our aim is  
to recreate in its entirety, the original performance by not adding  
or subtracting anything, irrespective of the source.  
11  
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Minimalist Aesthetics  
Our products appeal to those who seek the ultimate in audio  
exclusivity, namely the perfect blend of “form and function”.  
“Form and function” are both tough masters. We make no  
excuses for producing some of the most distinctive high-end  
audio products on the planet. We let “form and function” blend  
together in perfect harmony. This surely is the essence of true  
minimalist utilisation.  
Minimalism in a Wider Context  
John Pawson writes:  
Clearly simplicity has dimensions to it that go  
beyond the purely aesthetic: it can be seen as the  
reflection of some innate, inner quality, or the  
pursuit of philosophical or literary insight into the  
nature of harmony, reason, and truth”.  
12  
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6
Special Design Features  
Construction The beautifully styled curving front panel is milled from solid  
6.0mm (0.2”) thick aluminium extrusion and finished in a satin  
chrome electroplate.  
The front panel also features the  
mboob^ru® logo machined into the solid aluminium. The  
chassis and cover are both manufactured from heavy gauge steel.  
No cover fixing screws are visible. The “Silhouette” SXH2 is  
stylish yet functional and exhibits typical hallmarks of the  
Perreaux brand.  
Circuit  
Topology  
The Power The SXH2 has an internal power supply. These designs are  
Supply invariably more sophisticated than those featuring external plug-  
in power packs. Special attention must be paid to shielding,  
supply transformer design, capacitance and earthing.  
Perreaux has specially developed a fully shielded internal  
toroidal power supply. A total of 22000µF of smoothing  
capacitance and low pass RC filters are employed to provide a  
“rock-solid”, super low ripple, linear DC power supply.  
13  
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Single  
Channel  
Block  
Diagram  
Input Stage Utilising a stable current source, along with accurate current  
mirroring circuitry, the input stage of the SXH2, in combination  
with the overall circuit topology, provides precise detail  
resolution and definitive sonic transparency.  
PCB Layout Special attention has been lavished on the PCB layout. The unit  
is symmetrical in design with each channel being isolated from  
the other. The super clean custom designed power supply is  
physically segregated from the rest of the sensitive electronics.  
Signal Special attention has been paid to ground planes to maintain  
Ground sonic purity. All signal grounding is optimised to provide a  
platform for a black background and increased dynamic range.  
Gain Two gain settings are available, enabling optimum performance  
Selection  
and listening levels to be achieved from both high and low  
impedance headphones.  
High Power The output stage is capable of delivering 1.0WRMS per channel  
Output  
into a 64load and is stable down to 4, enabling the SXH2 to  
effortlessly drive a vast array of headphones with the control and  
authority that people have come to expect from Perreaux  
products.  
Dual Two stereo headphone jacks give the option of connecting two  
Outputs sets of headphones, allowing another party to be enveloped by  
the detailed and dynamic musicality of the SXH2.  
Note:  
Please ensure that the resulting impedance of the two  
headphone sets is not below 8. Use the following  
equation to calculate the total impedance: RT = (R1 * R2) /  
(R1 + R2).  
14  
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7
Care and Maintenance  
Note:  
Please switch the unit off and remove the cord set from the  
rear of the Headphone Amplifier before attempting to  
clean your SXH2 in the manner described below.  
Never apply liquid directly to the SXH2.  
Never use abrasives.  
Never rub in a circular motion.  
Cover  
The cover features a durable high quality powder coat finish. To  
remove finger marks and dirt, lightly rub the surface with a soft  
cloth.  
If the dirt is not removed, dip your cloth in a mild solution of  
soap and water, squeeze excess moisture from it and then gently  
reapply to the surface.  
Stubborn dirt may be removed by the application of a small  
quantity of isopropyl alcohol, applied directly to the cleaning  
cloth only, and reworking the effected area.  
Front Panel The SXH2 front panel features a high quality electroplate finish.  
Over time the surface may retain finger marks and may need to  
be cleaned to restore it to original condition.  
Regular Cleaning  
Gently wipe the front panel with a very clean cotton cloth. Wipe  
across the surface and never in a circular motion.  
Removing Stubborn Marks  
Only attempt this infrequently, as too regular or vigorous  
application may damage the surface.  
Apply a small quantity of any car polish containing carnauba  
wax to a very clean cotton cloth.  
Note:  
The car polish must state “Safe for Clear Coats” as the polish  
will therefore contain the absolute minimum amount of  
abrasive compound.  
Gently wipe over the front panel in lateral motion, allow to dry  
then gently wipe off with a very clean cotton cloth.  
15  
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8
Warranty Information  
1 Year The Perreaux SXH2 is warranted free from defects in material  
Limited and workmanship under normal use for a period of 1-year (365  
Warranty days) from the date of purchase.  
To extend the warranty of the Perreaux SXH2 to three (3) years  
from date of purchase, please return a fully completed warranty  
registration form along with a copy of the original receipt of  
purchase to:  
Perreaux Industries Ltd.  
PO Box 305  
Mosgiel  
Dunedin 9053  
New Zealand  
For the Extended Warranty Registration Form, please refer to  
Chapter 9.  
3 Year The extended warranty for the Perreaux SXH2 is three (3) years  
Extended from the date of purchase. If during the warranty period the  
Warranty SXH2 exhibits defects in materials and/or workmanship, it will  
be repaired or replaced, at our option, without charge for either  
parts or labour, at our factory in New Zealand. The warranty  
does not apply to any unit that has been misused, abused or  
altered.  
Any unit that is not performing satisfactorily may be returned to  
the factory in New Zealand for evaluation. Return authorisation  
must first be obtained by either calling or writing to Perreaux  
prior to shipping the unit. Perreaux Industries Ltd. and its  
authorised distributors and dealers shall not be held liable for any  
freight or insurance charges. Freight and insurance charges to  
and from the Perreaux factory will be the sole responsibility of  
the owner of the unit.  
There is no other express warranty on the SXH2. Neither this  
warranty nor any other warranty, express or implied, including  
any implied warranties of merchantability of fitness, shall extend  
beyond the warranty period. No responsibility is assumed for  
any incidental or consequential damages.  
Obtaining In the event that you are experiencing difficulty with your SXH2,  
Service please as a first step consult the troubleshooting guide in Chapter  
10. For further assistance, please contact your Perreaux dealer.  
16  
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9
Extended Warranty  
Registration Form  
Please complete this form and either fax, mail or e-mail it, along  
with a copy of the original receipt, to Perreaux Industries Ltd.  
Fax:  
+64 3 489 2976  
Mail:  
Perreaux Industries Ltd.  
PO Box 305  
Mosgiel  
Dunedin 9053  
New Zealand  
Alternatively, complete the online Warranty Registration Form  
3 Year Extended  
Warranty Form  
Name:  
Address:  
Suburb:  
City:  
Country:  
Telephone:  
E-mail:  
Website:  
Product:  
S I L H O U E T T E   S X H 2                    
Serial No:  
Dealer:  
Purchase Date:  
/
/
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17  
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10  
Troubleshooting Guide  
Please use this guide if you are experiencing any problems with  
the SXH2 in your system. It will provide possible solutions for  
some given symptoms.  
There is no SXH2 not turned on  
output from  
my system  
Make sure the SXH2 power switch is in the DOWN position.  
AC cord not plugged in  
Check that the AC cord is plugged into the IEC socket on the rear  
of the SXH2.  
Mains power not turned on  
Check if the power is turn on at the mains socket on the wall.  
Interconnect cables not connected  
Make sure that the input and output interconnect cables are  
plugged in and are connected to the respective RCA sockets on  
the rear of the SXH2.  
Source not turned on  
Check that your source component is plugged in to the mains and  
the power is turned on.  
Source not set to play  
Ensure that your source component is playing the recording you  
would like to listen to, and that pause is not pressed.  
No volume setting  
Make sure that the volume on your SXH2 is set to a suitable  
level.  
SXH2 set to incorrect input  
Confirm that the input on your SXH2 is connected to the  
appropriate source output.  
Headphones not connected  
Check that your headphones are firmly inserted into the jacks on  
the front of the SXH2.  
18  
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I can hear a Input and/or output sockets corroded  
hum coming  
through my  
headphones  
Check that the input and output RCA sockets on the rear of the  
SXH2 are free from corrosion.  
Interconnect cables damaged  
Make sure that the integrity of your interconnect cables is sound  
and they are firmly connected to your source and the SXH2.  
SXH2 is close to external interference  
Check the proximity of your SXH2 to any possible source of  
EMI and/or RF interference, for example computers, televisions,  
amplifiers, speakers, etc. Ideally the SXH2 should be placed as  
close as possible to your source.  
Earth loop in system  
If your preamplifier and/or amplifier have an earth/ground lift  
switch, toggle it and check which setting sounds better. The  
signal ground of the SXH2 is isolated from earth by default, this  
means that there needs to be a connection to earth elsewhere in  
your system to alleviate hum.  
The volume Gain setting too low  
control is at  
Toggle the gain configuration switch at the rear of the SXH2 UP  
to the HIGH gain position. Make sure you turn down the volume  
before changing this setting.  
maximum  
and output  
level too low  
The volume Gain setting too high  
control is  
too sensitive  
Toggle the gain configuration switch at the rear of the SXH2  
DOWN to the LOW gain position.  
19  
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11  
Specifications  
The correlation between published specifications and sonic  
quality can be unreliable. A list of numbers reveals virtually  
nothing. All technical measurements must be subject to  
qualitative as well as quantitative interpretation. Measurements  
of the SXH2 reveal excellent results by any standards. Tested at  
115V and 230V after a 10 minute warm up period.  
Specifications  
in Brief  
Rated Power Output (per channel)........................2.0WRMS into 32Ω  
........................................................................1.0WRMS into 64Ω  
..................................................................215mWRMS into 300Ω  
Voltage Swing...................................................................31.5Vp-p  
Input Sensitivity..............................................................1.45VRMS  
Maximum Gain .................................................................. 15.0dB  
Gain Adjustment:  
Low Setting........................................................................-10dB  
High Setting.......................................................................... 0dB  
Input Impedance....................................................................50kΩ  
Total Harmonic Distortion (THD+N):  
Typically........................................... 0.001%, @ 1kHz into 64Ω  
20Hz to 20kHz.............................................................. <0.005%  
Frequency Response ..........................5Hz–60kHz, +0dB -0.25dB  
Signal to Noise Ratio:  
Rated Output (unweighted)................................................... 105dB  
Dynamic Headroom (rated with music)................................... >3.0dB  
Power Consumption:  
Idle.................................................................................. 500mW  
Maximum (at 3.5W per channel into 8  
)
.................................... 8.0W  
Audio Connections  
Inputs.......................................................... 1 pair line level (RCA)  
Outputs....................................................... 1 pair line level (RCA)  
......................................2 stereo headphone jacks (6.35mm, ¼”)  
Other Connections  
IEC AC mains input receptacle  
Mains Input Voltage  
115V or 230V AC at 50Hz/60Hz  
(Set within the SXH2 at time of manufacture)  
20  
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Internal Mains Fuse Rating  
1 x 2SB 500mA slow blow  
(NOT user serviceable)  
Overall Dimensions  
Width........................................................................216mm (8.5”)  
Depth........................................................................181mm (7.1”)  
Height........................................................................ 58mm (2.3”)  
Weight  
Gross ..........................................................................2.0kg (4.4lb)  
Net............................................................................. 1.4kg (3.1lb)  
Specifications  
Explained  
Rated Power Output (per channel)................... 1.0WRMS into 64Ω  
This is the optimum operating level of the unit, offering the best  
performance whilst allowing  
a
large enough buffer to  
accommodate the unpredictable nature of music. It is the  
reference output level to which other specifications, such as  
sensitivity and gain, are referred. The Rated Output does not  
indicate the full capability of the SXH2.  
Voltage Swing ...................................................................... 31.5Vp-p  
Loud transients call for a sudden burst of power from the  
amplifier to drive the headphones. This force is voltage. Peak-  
to-peak voltage is a more useful specification than Watts when it  
comes to delivering power to a speaker.  
Input Sensitivity ...................................................................1.45VRMS  
The Input Sensitivity figure indicates the input voltage required  
to achieve “rated” output (1.0WRMS into 64).  
Maximum Gain.......................................................................15.0dB  
The amount of amplification the amplifier is asserting on the  
input signal. Gain can be calculated by dividing the rated output  
by the input sensitivity.  
Input Impedance....................................................................... 50kΩ  
The resistance “load” that is presented to the source component  
that is driving the SXH2.  
21  
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THD+N..................................................0.001%, @ 1kHZ into 64Ω  
Total Harmonic Distortion + Noise is the percentage of output  
signal which is made up of frequencies added due to harmonics  
of the fundamental frequency and noise. By using low-noise  
input circuitry and Class A signal stages, Perreaux engineers  
have kept this figure to a minimum.  
Frequency Response.................... 5Hz to 60kHz, +0dB -0.25dB  
Describes the frequency range where the amplitude or strength of  
the output signal deviates by no more than 0.25dB.  
Signal to Noise Ratio (unweighted)........................................105dB  
The ratio of desired signal to noise signals in the output.  
Headphone reproduction is susceptible to noise because of the  
nature of the environment to reveal every detail. This is why  
Perreaux engineers have designed the SXH2 to maintain a low  
noise floor.  
Dynamic Headroom ............................................................. >3.0dB  
This indicates the SXH2 can provide more than enough extra  
power to cope with the sharpest musical transients. Without  
adequate headroom, an amplifier can become unstable under  
clipping conditions. Perreaux amplifiers are intrinsically stable  
under all dynamic conditions.  
22  
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12  
Physical Dimensions  
23  
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13  
Contact Details  
For more information please contact your Perreaux dealer, or  
contact:  
Perreaux Industries Ltd.  
PO Box 305  
Mosgiel  
Dunedin 9053  
New Zealand  
Ph:  
Fax:  
+64 3 489 2975  
+64 3 489 2976  
24  
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Installation Notes  
25  
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