background image

 

 

20 

7

7

7

7

 

Special Design

 

Features 

Rugged Build 

Quality 

M echanical  strength  has  been  a  hallmark  of  Perreaux  products  since  the 
company first started production back in 1974.  The concept behind the physical 
design and construction is that each structural member should contribute to both 
rigidity and performance. 

Balanced 

Design 

The  SM 6  is  a truly  balanced  preamplifier,  from  input to  output.   The positive 
and negative halves of the signal never touch, remaining balanced throughout all 
stages.    This  circuit  topology  offers  the  ultimate  in  performance,  providing 
increased noise rejection and lower levels of distortion. 

Class A 

Output 

Four discrete output stages operating in Class A provide output buffering.  This 
enables  low  impedance  loads  to  be  driven,  over  long  cable  lengths  using  any 
cable. 

Multiple 

Power 

Supplies 

There is a separate power supply for each section of the preamplifier.  One for 
each of the volume control  chips (two chips are used to keep the system fully 
balanced  and  therefore,  to  maintain  separation,  each  chip  is  supplied  with  it’s 
own separate power supply), another one for each of the output buffering stages  
(once again because the SM 6 utilises a fully balanced circuit topology), another 
for the digital logic and the final power supply looks after the input relays.  The 
advantage  of  this  is that there  is  complete  isolation  from  stage  to  stage.    The 
digital  noise  is  kept  completely  out.   This  is  further  evidence  of  a  thoroughly 
designed product offering. 

Infrared (IR) 

Remote 

Control 

M any  audiophile  grade  components  are  still  provided  with  analogue  controls  
that are adjusted on the faceplate of the unit.  The SM 6 features an infrared (IR) 
remote  control  meaning  you  don’t  have  to  get  out  of  your  chair  to  make  an 
adjustment.    Some  of  the  functions  available  are:  standby,  mute,  volume 
up/down, display on/off, input select and balance. 

Earthing 

Perreaux  engineers  pay particular  attention to  designing  the  product  to  ensure 
maximum separation between internal signal and power earths, only meeting at a 
central starred point. 

Precision 

Volume 

Control 

The SM 6 uses two digitally controlled resistor ladder volume controls.  This is 
because  we  treat  the positive  and  negative  parts  of the  signal  separately  (true 
balanced  topology).    The  advantages  of  using  a  digitally  controlled  analogue 
resistor  ladder  to  adjust  volume  are  precise  control,  no  contacts  to  corrode 
creating wiper noise and no analogue component drift. 

Dual Outputs 

You  do  not  need  to  purchase  an  RCA  style  splitter  if  you want to  drive  two 
separate  power  amps  simultaneously,  as  there  are  dual  parallel  preamplifier 
outputs. 

Содержание SM6 MKII

Страница 1: ...Prisma SM6 MkII Balanced Preamplifier Owners Manual...

Страница 2: ...change products or specifications detailed herein at any time without notice and does not make any commitment to updatethe information contained herein No licenses to patents or other intellectual pr...

Страница 3: ...sonic realism and electronic reliability with a functional yet elegant appearance that reflects the care and craftsmanship applied during all stages of construction Features at a Glance Rugged build q...

Страница 4: ...ibed in the operating instructions or as marked on the rear of the unit DO NOT disconnect the mains earth from the system The mains power supply cord should be routed so that it is not likely to be wa...

Страница 5: ...4 4 4 4 Rear Panel Functions 11 5 5 5 5 Remote Control Functions 15 6 6 6 6 Special Design Philosophies 18 7 7 7 7 Special Design Features 20 8 8 8 8 Maximising System Potential 21 9 9 9 9 Care and M...

Страница 6: ...n Remove the two grey foam protectors off either side of the unit leaving the black material covering Pull back the material and remove the protective membrane from the front panel The preamplifier is...

Страница 7: ...plifier Connect the balanced XLR or unbalanced RCA outputs of your SM6 to the appropriate inputs at the rear of your power amplifier Note Try to keep all interconnect cables as far from loudspeaker ca...

Страница 8: ...our source material Start your source material playing Increase the volume Slowly increase the volume on the SM6 to achieve a comfortable listening level CONGRATULATIONS Now that you have achieved you...

Страница 9: ...play and operation can be resumed by pressing buttons simultaneously again Refer to Chapter 5 Remote Control Functions for further details on volume and standby controls Alphanumeric Display The displ...

Страница 10: ...t to avoid the potentially damaging feed back loop which can occur if inadvertently attempting to record and playback the same source simultaneously Mute Pressing the buttons simultaneously will mute...

Страница 11: ...cancellation of distortion products The pin assignments of the balanced XLR input connectors are as follows Pin 1 Signal ground Pin 2 Signal non inverting Pin 3 Signal inverting Shield ground Chassis...

Страница 12: ...able for recording from the selected source input This output is disconnected when source input E is selected to prevent any potentially damaging feedback loops Tape 2 Line Outputs This single ended R...

Страница 13: ...act your Perreaux dealer Qualified service personnel can only perform this modification Caution Never attempt to connect the unit to the incorrect voltage Severe damage can result from applying incorr...

Страница 14: ...lace with the same type and value fuse Remember fuses do not usually blow without a reason Any doubts about fuse failure should be conveyed directly to your Perreaux dealer For more information on fus...

Страница 15: ...unch through function and will operate regardless of the code set selected i e you can be operating the CD player remote functions and still use the mute control without selecting the button first Dis...

Страница 16: ...trol selects source input D This offers a preamplifier bypass for home theatre applications Home theatre bypass mode is indicated by HT on the display of the SM6 Note Volume and balance functions are...

Страница 17: ...Source Up Pressing this button scrolls the source input up selecting in the order IA IB IC HT IE IF Scroll Source Down Pressing this button scrolls the source input down selecting in the order IA IF I...

Страница 18: ...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 Minimalist Electronics We wish to maximise the qu...

Страница 19: ...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 si...

Страница 20: ...ogy another for the digital logic and the final power supply looks after the input relays The advantage of this is that there is complete isolation from stage to stage The digital noise is kept comple...

Страница 21: ...e input sensitivity so that when the same input signal is provided to each of them the output level will be exactly the same This can often be done with one power amplifier connected to the tweeters a...

Страница 22: ...e with your particular priorities The best advice we can give concerning the choice of loudspeakers is establish clearly in your mind your requirements listen to many makes and models and if at all po...

Страница 23: ...by the application of a small quantity of methylated spirits applied directly to the cleaning cloth only and reworking the effected area Front Panel The SM6 front panel features a high quality electr...

Страница 24: ...it will be repaired or replaced at our option without charge for either parts or labour The warranty does not apply to any unit that has been misused abused or altered Any unit that is not performing...

Страница 25: ...Perreaux Industries Ltd PO Box 305 Mosgiel Dunedin 9053 New Zealand E mail info perreaux com Alternatively complete the online Warranty Registration Form on our website www perreaux com 5 Year Extende...

Страница 26: ...must be employed to negate these effects on low level signal equipment Another good practice to adopt is to keep all signal leads away from power leads The practice of neatly tying excess leads togeth...

Страница 27: ...experiencing a problem such as one channel not working or a noise in one channel it is good practice to adopt a method of isolating the problem to a specific item or area This practice will assist in...

Страница 28: ...now swapping them at the amplifier output If the fault now appears in loudspeaker B then that loudspeaker lead is at fault go no further If the fault appears in loudspeaker A then loudspeaker leads ar...

Страница 29: ...out at a minimum volume setting Only increase the volume after the connections have been changed Should the fault prove to be in the amplifier it will be necessary to determine where the fault actual...

Страница 30: ...estore speaker cablesto original connections Fault in loudspeaker B Swap amplifier source input channels Loudspeaker A at fault YES NO Loudspeaker cable at fault Fault in loudspeaker A Swap source out...

Страница 31: ...after a 10 minute warm up period Specifications In Brief Rated Output Unbalanced 1 5VRMS Balanced 1 5VRMS Maximum Output Unbalanced 3 3VRMS Balanced 6 8VRMS Gain Range 97dB to 18dB Gain Resolution 1 5...

Страница 32: ...er serviceable Weight Net 7 7kg 17 0lb Gross 10 7kg 23 6lb Specifications Explained Rated Output 1 5VRMS The SM6 has been designed to drive any amplifier to it s full potential Even with an input leve...

Страница 33: ...imes higher thus exceeding the audible range of the human ear Signal to Noise Ratio unweighted 100dB The ratio of desired signal to noise signals present in the output The balanced circuit topology of...

Страница 34: ...its rated output even from the lowest of input levels Input Overload 3 9VRMS Input Overload specifies the maximum signal level that each input circuit can handle without overloading the preamplifier c...

Страница 35: ...35 14 14 14 14 Physical Dimensions...

Страница 36: ...ails 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 info perreaux com...

Страница 37: ...37 Installation Notes...

Отзывы: