Perreaux SX25 audio amplifier
Contents
1. PRERIRE AUX E 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 SX25 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 Leading British architect John Pawson writes 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 cu2. 15V and 230V after a 10 minute warm up period Rated Power Output per channel 25W rms into 80 TASSI SE SAI II SIE SOIT e RI TE 35WrMSs into 40 KEE 55 2Vy p Input Sensitivity 0 63 Vrws G te 27 1dB Input Impedance Typically nck ct ecectnicn a ala ae che 40kQ Total Harmonic Distortion THD N Typically arien den en ee 0 002 IkHz into 8Q 20Hzt020kHz anta iaia ian lt 0 02 Frequency Response 20A Z 2 0KH Z sn een ARES 0dB 0 25dB KURS EE 0dB 1 0dB Signal to Noise Ratio Rated Output unweighted ss 100dB Dynamic Headroom rated with music gt 2 0dB Power Consumption Id es Te Lelio LI lla 10W Maximum at 35W per channel into AH 80W Audio Connections Inputs assai eda lle 1 pair line level RCA Otto eer Ee at 1 pair line level RCA EEE CRE E EER 2 pairs speaker binding posts Other Connections IEC AC mains input receptacle Mains Input Voltage 115V or 230V AC at 50Hz 60Hz Set within the SX25 at time of manufacture 20 Specifications Explained PRERIRE AUX E Internal Mains Fuse Rating 1 x 2SB 1A slow blow NOT user serviceable Internal Output Fuse Rating 2 x 2SB 4A normal blow NOT user serviceable Overall Dimensions Middle ennemies 216mm 8 5 Depth nia dad la alia 178mm 7 0 Heights Lala 58mm 2 3 Weight Gross ade i 3 0kg 6 61b Net nali ins 2 4kg 5 31b Rated Power Output per channel 25W rms into 8Q This is the opti
3. AH A WW s 0 WN O GET Table of Contents Introducing the Perreaux Silhouette Series mrsrnsrnsersersvravesnvnnvnnns 2 Important Safety Instructions rire rire rire 3 Table of Contents ra sersernvnennennennnnennvnnnnennnnennennnnennennnnennennnnennennnnennennener 4 Unpacking and Placement sn reina 5 Instant INStall urina 6 Front Panel Functions rire ere eee iii einen 8 Rear Panel Functions rsnennnvnnnvnnnvnnnvnnvnnnvnnnvnnnnnnnnnnnnnnvnnnvnnnennnennnvnnnennnne 9 Special Design Philosophies sis 11 Special Design Features mrmmensersvrnnvnsernvrnennensernvnnnnnnvnnennennensernvnnnnnsenner 13 Care and Maintenance rr rire ieri 15 Warranty Information nine 16 Extended Warranty Registration Form nn 17 Troubleshooting Guide nanas 18 Specifications lt ntri iii 20 Physical DIMENSIONS nissan 23 Contact Details runvnnnvnnnvrnnvnnnennnvnnnnnnvnnnvnnnvnnnennnnnnvnnnennnennnennnennnvnnnnnnenne 24 Unpacking Procedure Note Box Contents Placing Your SX25 Ventilation Requirements Note PRER RE AUX K Unpacking and Placement The SX25 is packaged for maximum protection To open sit the 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 SX25 Power amplifier
4. Silhouette SX25 25W Power Amplifier Owners Manual PRERIREAUK PRER RE AUX K 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 PERREAUX is a registered trademark of Perreaux Industries Ltd Terms and product names in this document may be trademarks of others Key Features PRERIRE AUX 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 5 Class A signal stages 5 Highest quality internal power supp
5. er s output terminals Never connect the output of one amplifier to the output terminals of another amplifier Do not over tighten the binding posts on your amplifier 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 Caution PRERIRE AUX E Serial Number Voltage Label The serial number is unique to your SX25 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 Never attempt to connect the unit to the incorrect voltage On Off Switch When operating the switch down power is applied to the SX25 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 G 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 Minimalist Design
6. ew Zealand E mail nz info perreaux com Alternatively complete the online Warranty Registration Form on our website www perreaux com 3 Year Extended Warranty Form PRERIRE AUX i Name Address Suburb City Country Telephone E mail Website Product S I L H O U E T T E SIX 215 Serial No Dealer Purchase Date dd mm Ve MM oy 17 10 There is no output from my system PRERIRE AUX E Troubleshooting Guide Please use this guide if you are experiencing any problems with the SX25 in your system It will provide possible solutions for some given symptoms SX25 not turned on Make sure the SX25 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 SX25 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 SX25 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
7. gth of the output signal deviates by no more than 0 25dB Signal to Noise Ratio unweighted 100dB The ratio of desired signal to noise signals in the output Perreaux engineers have designed the SX25 to maintain a low noise floor Dynamic Headroom E gt 2 0dB This indicates the SX25 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 12 Physical Dimensions 13 PRERREAUKV Contact Details For more information please contact your Perreaux dealer or contact Perreaux Industries Ltd PO Box 305 Mosgiel Dunedin 9053 New Zealand Ph 64 3 489 2975 Fax 64 3 489 2976 E mail nz info perreaux com Internet www perreaux com 24 PRERIRE AUX A Installation Notes 25
8. is now unpacked and ready for further installation Please retain all packaging material for future transport I x SX25 Power amplifier I x Product manual 3 x Performance analysis charts I x Detachable AC power cord The SX25 should generally be placed close to your source equipment thus keeping interconnect cabling between the SX25 and associated components as short as practical This will reduce the systems susceptibility to radio frequency RF interference and the negative effects associated with long cables The SX25 is a convection cooled amplifier For optimal performance the unit MUST receive adequate ventilation a Please do not cover the product with a cloth or similar a Please do not mount the SX25 directly onto carpeted surfaces In the event that the SX25 is to be incorporated into custom cabinetry please refer to the dimensional information provided in the Physical Dimensions section of the manual Chapter 12 Please take all necessary steps to ensure that the unit receives adequate ventilation Note Note PRER RE AUX K 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 SX25 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 Please take the time to read the SX25 man
9. ket at the wall and turn on the power of the SX25 by setting the power switch down Switch on preamplifier and source component Turn on your preamplifier Power up your source component and start your favourite recording Slowly increase the preamplifier 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 PRERIRE AUX E Front Panel Functions O Power LED This blue LED indicates the power status of your SX25 Power Amplifier PRERREAUX E Rear Panel Functions ii nd Silhouette SX25 25W Power Amplifier LINE OUT Designed and Buit in NewZealand No User Serviceable Parts Inside WWW perreaux com Caution SS mn LINE IN Right and Left Speaker Binding Posts Binding posts are clearly marked and colour coded RED Positive and BLACK Negative This polarity must be observed when connecting loudspeakers i e positive terminal of the SX25 to the positive terminal of the loudspeaker and negative terminal of the SX25 to the negative terminal of the loudspeaker Never connect the amplifiers output terminals to any device other than a loudspeaker Please do not short circuit the amplifi
10. ly featuring a custom designed fully shielded toroidal transformer and 13200uF of smoothing capacitance 5 Optimal internal layout incorporating total separation between channels a Enhanced audio design featuring highest quality PCB and minimal internal wiring 5 Line out connections 5 High current drive o Compact o Stylish J ha ER Silhouette i series takes you even ee to the sane goal of Mo P erfect Reed ofa Masical Event From all of us at Perreaux Industries Limited thank you for choosing the Perreaux Silhouette Series SX25 Power Amplifier Note PRER RE AUX K Important Safety Instructions Please read all instructions carefully before attempting to operate your Perreaux Silhouette SX25 Power Amplifier ALW AYS 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 ALW AYS 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 SX25 with the cover removed NEVER use any liquid inside the SX25 NEVER bypass any fuse NEVER attempt to repair the SX25 In the event of a problem please contact your Perreaux dealer NEVER expose the SX25 to extremely high or low temperatures NEVER operate this product in an explosive atmosphere NN CG
11. mum 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 SX25 Voltage SWING 55 2Vp p Loud transients call for a sudden burst of power from the amplifier to drive the speakers This force is voltage Peak to peak voltage is a more useful specification than Watts when it comes to delivering power to a speaker alte VE 0 63Vrms The Input Sensitivity figure indicates the input voltage required to achieve rated output 25Wrwg into 80 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 IMPEdAnNCe sens 40kQ The resistance load that is presented to the source component that is driving the SX25 21 PRERREAUKV THOEN use ne anne 0 002 1kHZ into 8Q 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 20Hz to 20kHz 0dB 0 25dB Describes the frequency range where the amplitude or stren
12. nship 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 SX25 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 In the event that you are experiencing difficulty with your SX25 please as a first step consult the troubleshooting guide in Chapter 10 For further assistance please contact your Perreaux dealer 16 P ERRE AUX 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 N
13. ology provides precise detail resolution and definitive sonic transparency 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 Special attention has been paid to ground planes to maintain sonic purity All signal grounding is optimised to provide a platform for a black background and increased dynamic range 14 Note Cover Front Panel Note F RRE AUX K Care and Maintenance Please switch the unit off and remove the cord set from the rear of the Amplifier before attempting to clean your SX25 in the manner described below Never apply liquid directly to the SX25 Never use abrasives Never rub in a circular motion 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 The SX25 front panel features a high quality electroplate finish Over time the surface may retain finger marks and may need to be cleaned to resto
14. put Stage PCB Layout Signal Ground PRERIRE AUX E The SX25 features a 98VA toroidally wound mains transformer directly soldered to the PCB Wima Elna brand capacitors highest quality Zobel network and customized internal heat sink solution The PCB is double sided and constructed from the highest quality fibreglass base stock featuring 20z tracks Perreaux has specially developed a fully shielded 98VA internal toroidal based power supply No fewer than six filter capacitors are coupled in parallel providing a total of 13 200uF of power supply smoothing keeping ripple to a minimum As a result the power supply is extremely rigid capable of delivering instantaneous power requirements demanded by musical transients The result is significantly improved dynamic capabilities Front panel features on off LED indication The rear panel comprises a mains input receptacle allowing the cord set to be upgraded if desired mains switch high quality speaker binding posts RCA line input and line output Input Input Stage Careful attention has been paid to the signal path within the amplifier It is ultra short guarded by ground planes where necessary and carefully routed to avoid contamination from power supply and high current bearing sections Utilising a stable current source along with accurate current mirroring circuitry the input stage of the SX25 in combination with the overall circuit top
15. re 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 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 1 Year Limited Warranty 3 Year Extended Warranty Obtaining Service PRERIRE AUX E Warranty Information The Perreaux SX25 is warranted free from defects in material and workmanship under normal use for a period of 1 year 365 days from the date of purchase To extend the warranty of the Perreaux SX25 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 The extended warranty for the Perreaux SX25 is three 3 years from the date of purchase If during the warranty period the SX25 exhibits defects in materials and or workma
16. rrent 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 PRERIRE AIA 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 6 Construction Circuit Topology Compact Unsurpassed Performance PRERIRE AUX E Special Design Features The SX25 is st
17. to listen to and that pause is not pressed No volume setting Make sure that the volume on your preamplifier is set to a suitable level Preamplifier set to incorrect input Confirm that the input on your preamplifier is connected to the appropriate source output Loud speakers not connected Check that your loud speakers are firmly connected via cables into the binding posts on the rear of the SX25 18 I can hear a hum coming through my loud speakers PRERIRE AUX E Input sockets and or output binding posts corroded Check that the input and output RCA sockets and binding posts on the rear of the SX25 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 SX25 SX25 is close to external interference Check the proximity of your SX25 to any possible source of EMI and or RF interference for example computers televisions amplifiers speakers etc Ideally the SX25 should be placed as close as possible to your source 19 11 Specifications in Brief PRERIRE AUX E 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 SX25 reveal excellent results by any standards Tested at 1
18. ual thoroughly as it incorporates many features which will enhance its operation Placement The SX25 is a convection cooled amplifier and best results will be achieved when placed on a solid surface with adequate ventilation DO NOT place on a carpeted floor or cover the amplifier Place the SX25 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 SX25 into the system Connect source to preamplifier Connect the audio output from the source component to the input of your preamplifier Connect preamplifier to SX25 Connect the audio output from your preamplifier to the inputs at the rear of the SX25 Refer to Chapter 4 for Rear Panel information Connect loud speaker cables to SX25 Connect your left and right channel loudspeaker leads to the speaker binding posts at the rear of the amplifier Refer to Chapter 4 for Rear Panel information Make sure the nominal impedance of the loudspeakers is not lower than 20 Caution PRERIRE AURA Switch on SX25 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 Insert the power cord supplied into the rear of the SX25 and into the wall Switch on the soc
19. ylish and unobtrusive The front panel is made from high quality solid 6 0mm 0 2 thick aluminium extrusion featuring our trademark machined Perreaux logo These are finished in durable and stylish satin chrome finish electroplate On off status is provided via a discreet blue LED inset into the front panel The chassis and cover are both manufactured from heavy gauge steel No cover fixing screws are visible These minimalist styling cues combine seamlessly to allow form and function to blend in harmony and are typical hallmarks of the Perreaux brand Left Line Input Right Speaker amp Speaker AC Input Output Line Output Output hb i i Output VA Input Stage Stage Stage i hb Toroid Left Channel Power Supply At 216mm 8 5 wide x 58mm 2 3 high x 190mm 7 5 deep the SX25 is extremely compact Capable of continuously delivering 25w per channel into an 8Q load and 35W into 40 the SX25 is powerful for its small stature When correctly matched to loudspeakers the SX25 will deliver unsurpassed performance in its class and will effortlessly drive a vast array of smaller loudspeakers with the control and authority that people have come to expect from Perreaux products 13 Finest Quality Components Used Throughout The Power Supply Simple control functionality Single Channel Block Diagram Ultra Short Signal path In
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