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ACOUSTIC SOLUTIONS SP 101 Owner's Manual

Made by: ACOUSTIC SOLUTIONS
Type: Owner's Manual
Category: Amplifier
Pages: 12
Size: 0.92 MB

 

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Congratulations  on  purchasing  this  Acoustic  Solutions’  integrated  amplifi er. 

It  has  been  developed  following  an  extensive  research  and  development 

program that has culminated in what we regard as an exceptional mid-range 

hi-fi  product.

Our  aim  when  designing  this  product  was  to  produce  a  visually  appealing 

unit  which  would  look  comparable  to  higher  priced  products,  and  give  an 

exceptional performance to match.

We  trust  that  this  amplifi er  will  give  you  hours  of  listening  pleasure,  and 

provide years of unparalleled performance. As with any new electrical product 

please  be  patient  and  allow  at  least  36  hours  use  before  all  components 

have acclimatised themselves to your surroundings, and found their optimum 

working temperature. Please do not operate this product at high volume levels 

immediately after switching on.       

INTRODUCTION

CONTENTS

Introduction

Safety Instructions

Front Panel Controls

Rear Panel connections

Installation and Position

Making the Connections

Using the Amplifi er

Trouble Shooting

Specifi cations

Contact Details 

 

 

PAGE No.

 1

 2

 3

 4

 5

 6

 7-10

11

12

12

 

 

 

SP 101 AMPLIFIER

1

 


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CAUTION: 

To  reduce  the  risk  of  electric  shock,  do  not  remove  any  cover. 

NO  USER-SERVICEABLE  PARTS  INSIDE,  REFER  ANY  SERVICING  TO 

QUALIFIED SERVICE PERSONNEL.

IMPORTANT SAFETY INSTRUCTIONS

• Read and keep these instructions available for future reference.

• For indoor use only.

• The unit must only be connected to a suitable mains power supply using the    

   mains power lead provided.

• To reduce the risk of fire or electrical shock, do not expose this unit to rain 

   or moisture.

• The apparatus shall not be exposed to dripping or splashing. 

• No objects filled with liquids, such as vases, shall be placed on the 

  apparatus.

• Unplug the unit from the wall socket during lightning storms and when it is 

   not going to be used for a long period of time.

• Take care that foreign objects do not enter, or liquids are not spilled, into 

   the enclosure through any openings. If this should happen, refer to qualified 

   service personnel before attempting to use.

• Ensure adequate ventilation - do not cover this unit with curtains, etc.

• Do not install near any heat source, such as radiators, or other equipment 

   that produces heat.

• Protect the mains power cable from being damaged.

• The SP 101 system is double insulated and does not require an earth 

   connection in the UK mains plug.

UK MAINS PLUG DETAILS

For your convenience a mains plug with a fuse (3 Amp) has been fitted to 

this appliance. For your safety please observe the following information.

• The SP 101 is designed to operate on AC mains supply between 220 

   and 240 volts, 50 Hz.

• The wires in the mains lead are coloured in accordance with the 

   following code:

    

   BLUE                  - NEUTRAL 

   BROWN 

- LIVE

• Under no circumstances should the Neutral or Live wires be connected 

   to the ‘E’ (Earth) terminal.

CAUTION

RISK OF ELECTRIC SHOCK!

DO NOT OPEN!

SAFETY  INSTRUCTIONS

This product complies with 

European low voltage (73/23/

EEC) and electromagnetic 

compatibility (89/336/EEC) 

directives. 

The lightning flash symbol with the arrowhead within an equilateral triangle is 

intended to alert the user to the presence of uninsulated ‘dangerous voltage’ 

within  the  product’s  enclosure  that  may  be  sufficient  to  constitute  a  risk  of 

electric shock to persons

The exclamation point within an equilateral triangle is intended to alert the user 

to important operating and maintenance instructions in the service literature 

relevant to this appliance.

2

 


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FRONT PANEL CONTROLS

1. LCD DISPLAY.

 Will give an indication of volume position and input source 

selected. Will also display other menu features as described on pages (7-13).

2. PHONO INPUT SELECTOR SWITCH.

3. TUNER INPUT SELECTOR SWITCH.

4. TAPE/AUX INPUT SELECTOR SWITCH.

5. CD INPUT SELECTOR SWITCH.

6. IR RECEPTOR.

 This can be used with optional 3 in 1 remote control which 

is available. This controls Amplifier, DAB and CD player from one hand set. 

7. DVD  INPUT SELECTOR SWITCH. 

(stereo 2 channel only).

8. DAB DIGITAL TUNER INPUT SELECTOR SWITCH.

9. FUNCTION BUTTON.

 Allows access to menu features such as bass, treble, 

balance, loudness, speakers on/off etc.

10. ROTARY CONTROL KNOB.

 This allows adjustment of parameters such 

as volume, bass, treble, balance, loudness and speakers on/off etc.

11. HEADPHONE SOCKET.

 Stereo 6.4mm jack for use with most 

headphones. 

12.  LED  POWER  INDICATOR.

  Light  will  show  green  to  indicate  that  the 

SP101  is  on.  It  will  show  red  if  the  SP101  is  in  stand  by  mode  set  by  the  

optional remote control.

13. POWER BUTTON.

 Switches mains power on/off to internal components, 

however please note that mains power is still applied to this unit even though 

this switch may be off.

3

 


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REAR PANEL CONNECTIONS

1. WARNING LABELS.

 Please be aware that this unit contains high voltages, 

and should not be opened, please refer to page 2 of this manual.

2. MAINS CABLE INLET POSITION.

 Please ensure that this cable strain relief 

bush is intact and has not been damaged.

3. LOUDSPEAKER OUTPUTS.

 Please ensure that +/- connections are made 

properly between rear of the SP101 amplifier and loudspeakers. Ensure wires 

are not frayed or touching.

4. LINE OUTPUT SOCKETS.

 This is for connection to external amplification 

or recording equipment.

5. DAB DIGITAL RADIO INPUT SOCKET.

6. DVD INPUT SOCKET.

 (2 channel stereo only).

7. CD INPUT SOCKET.

8. TAPE/ AUX INPUT SOCKET.

9. TUNER INPUT SOCKET.

10. PHONO INPUT SOCKET.

 For the connection of a turntable.

11. PHONO TERMINAL EARTH POST.

 It is necessary to provide a chassis 

earth connection between the turntable and the amplifier. Failure to do this will 

result in a buzzing or humming noise from the loudspeakers.

4

 


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INSTALLATION AND POSITION

This  amplifier  should  be  positioned  on  a  flat  stable  surface.  We  would 

recommend that the position of your hi-fi equipment should be chosen carefully 

to provide adequate protection for this device, but also provide an attractive 

showcase for your investment. Hi-fi equipment is not designed to be moved 

often, therefore it is recommended that a permanent home for your hi-fi be 

achieved as soon as is possible.  

As  this  amplifier  is  fitted  with  a  powerful  mains  transformer,  it  is  not 

recommended that sensitive audio equipment such as turntables or cassette 

decks be placed immediately next to it. Do not place the SP101 in areas of 

direct sunlight, nor place it adjacent to a radiator or other heating appliances. 

Like  all  amplifiers  the  SP101  will  generate  a  modest  amount  of  heat.  The 

cooling of this device is reliant upon the flow of air through the chassis grilles 

which are located on the top and bottom of the cabinet. Care should be taken 

not to cover these grilles with items such as rugs, covers or curtains which will 

restrict this air flow. Do not place the amplifier on a soft surface as this may 

result  in  the  bottom  grille  becoming  restricted,  and  as  a  result  may  lead  to 

over-heating.

Do not place records, tapes or compact discs on top of the unit. Be aware that 

after prolonged usage the chassis of this unit will become hot.

  

Never allow the amplifier to come into contact with water or liquids, and ensure 

that small objects do not fall through the ventilation grilles. In the event of this 

happening, disconnect the wall plug form the mains supply immediately, and 

contact your local dealer for service advice.

Do not position the power cable such that it can be walked upon, or damaged 

by regular traffic. Ensure that all other interconnecting cables such as speaker 

cables or ancillary equipment leads, are stowed safely behind the unit, and 

cannot be easily snagged or kicked thus causing possible damage to the unit.

Ensure  that  all  interconnetion  cables  have  been  fitted  correctly,  and  that 

polarity  has  been  maintained. This  is  especially  important  when  connecting 

loudspeakers to this amplifier. On the rear panel, binding post speaker outputs 

are provided. These are coloured red for positive, and black for negative.

There  will  be  a  corresponding  pair  of  terminals  on  the  rear  of  suitable 

loudspeakers. These terminals should be connected together with adequate 

quality  speaker  cables,  taking  care  that  the  red  terminal  on  the  amplifier  is 

connected to the red terminal on the loudspeaker. The same process should 

occur for the black terminals.  Care should be taken to ensure that no wires 

have become frayed during this process, and subsequently could be touching 

each other. This will cause a short circuit on the output stage of the amplifier, 

and will result in a poor or distorted sound. Failure to rectify this problem may 

result in long term damage to this unit.     

Position the loudspeakers a suitable distance away form the amplifier, gaining

enough  distance  to  allow  the  stereo  image  to  be  achieved.  Having  the 

loudspeakers too close to each other will not allow you to fully define the stereo 

content of music played through the system, plus may result in poor sound 

due to the cancellation properties that sometimes exist when in this state.  It 

is not ideal to place loudspakers in the corners of a room as this will normally 

colour the audible content of the music with a lift in bass content. Although it 

is  sometimes  desirable  to  increase  the  bass  response  of  your  system,  this 

can lead to a ‘boomy’ bass which is not always desirable, and can be hard to 

control. It should also be noted that firing loudspeakers onto a hard flat surface 

can  cause  mid  range  and  high  frequency  colouration  as  reflected  sound 

becomes part of the audible sound. This can lead to a harshness, or dead 

spots through cancellation.     

 

The best sound is always subjective to the listener, therefore we suggest you

arrange your hi-fi to suit your own listening tastes, and sit back and enjoy the 

fruits of your labour.   

5

 


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MAKING THE CONNECTIONS

6

 


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USING THE AMPLIFIER

When  you  unpack  the  amplifi er  from  the  box,  all  music  settings  will  be  at 

default values. These can be altered according to your listening tastes; these 

new settings will be retained within the memory of the amplifi er and will remain 

set even after switchiing off this system.

CHANGING THE INPUT LISTENING SOURCE

This amplifi er is fi tted with 6 inputs for connections to the following external 

equipment:

• Phono (turntable)

• Tuner (AM + FM)

• Tape / Aux line input source

• CD 

• DVD (stereo only)

• DAB tuner

These  will  be  connected  to  the  rear  panel  as  indicated  in  the  connection 

diagram on the previous page.

To change which input source is listened to, press once the switch below the 

corresponding piece of equipment which is required. Pressing another input 

source switch will change which music source is listened to.

The LCD display will show the corresponding input source selected on line 

2 of the display, this will change according to which input selector switch is 

pressed.

THE FUNCTION MENU

This SP101 amplifi er is fi tted with a digital user interface which allows 

complete control of the features of this amplifi er.

The menu structure of this product is as follows:

1.

2.

3.

4.

5.

6.

7

 


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VOLUME CONTROL DEFAULT SETTING

The default setting for the user interface control is the ‘volume’ setting. This will 

be displayed on line one of the LCD display as a numeric dB value.

Note:

  dB values are a professional indication of the amplitude of an audio 

signal with full or maximum output achieved normally at 0dB. You will notice 

the LCD display on this amplifi er will read minus dB fi gures up until zero which 

will indicate maximum output.  

The rotary control (10) can be turned both clockwise and anticlockwise to alter 

the dB signal. There are 64 steps in total which range from -78.75dB for nil 

volume, to 0dB which will provide maximum output.

We have also provided a bar graph display on line 2 of the LCD display, which 

indicates the status of the volume control when rotated. There are 16 squares 

(     ) which run from left to right and will change pro-rata to the increase or 

decrease in volume  

This display will replace the input music source description on line 2 of the LCD 

display while the volume control is operated. This bar graph display will remain 

for a period of approx 5 seconds following the end of this volume change and 

will then return to indicate the input music source as the default following this 

time.   

BASS CONTROL

This  amplifi er  is  fi tted  with  a  bass  control  which  offers  +/-14dB  attenuation 

around the centre bass frequency of 100Hz, and +/-3dB across the frequency 

range of 45Hz to 259Hz.

To alter this bass control press the function button once, this will change the 

LCD display for bass control.

The last setting for the bass will be displayed.

To  change  the  bass  setting  turn  the  rotary  control  (10)  either  clockwise  or 

anticlockwise to increase or decrease the bass content.

There are 7 steps around the centre position for +/- attenuation, adjust this 

control to your desired listening level.

Attention: 

Please note that due to the level of boost available on this bass 

control, that prolonged use of this amplifi er at high levels with an increased 

bass content may cause permanent damage to your speakers. Please operate 

this system within the safe working limits of any ancillary equipment that is 

connected to it.

Note: 

following this operation, the LCD display will return to indicate the default 

volume  setting  if  no  operation  occurs  within  5  seconds.  To  reactivate  bass 

control it will be necessary to press the function button again.

8

 


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TREBLE CONTROL

This amplifi er is fi tted with a treble control which offers +/-14dB attenuation 

around the centre frequency of 10Khz, and 6dB across the frequency range 

of 2Khz to 20Khz.

To alter this treble control press the function button (9) twice to change the LCD 

display from bass control to treble control.

Attention:

 Please note that due to the level of boost available on this treble 

control, please be aware that prolonged use of this amplifi er at high levels with 

an increased treble content may cause permanent damage to your speakers. 

Please  operate  this  system  within  the  safe  working  limits  of  any  ancillary 

equipment that is connected to it.

The last setting for the treble will be displayed.

To  change  the  treble  setting  turn  the  rotary  control  (10)  either  clockwise  or 

anticlockwise to increase or decrease the treble content.

There are 7 steps around the centre position for +/- attenuation, adjust this 

control for your desired listening level.

Note:

 following this operation, the LCD display will return to indicate the default 

volume setting if no operation occurs within 5 seconds. To reactivate treble 

control it will be necessary to press the function button again twice.

BALANCE CONTROL

This amplifi er is fi tted with a balance control which allows the volume of the left 

and right signals of the stereo image to be altered in order to compensate for 

an off-centre listening position. 

To activate the balance control press the function key (9) three times to change 

the LCD display to the balance control.

   

 

The last setting for the balance will be displayed.

To change this balance setting turn the rotary control (10) either clockwise or 

anticlockwise to decrease the signal levels in either the right or left speakers.

There  are  32  steps  around  the  centre  position  for  attenuation,  adjust  this 

control for your desired listening balance.

Note: 

following this operation, the LCD display will return to indicate the default 

volume setting if no operation occurs within 5 seconds. To reactivate balance 

control it will be necessary to press the function button again three times.

9

 


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LOUDNESS CONTROL

This amplifi er is fi tted with a loudness control which provides a boost to lower 

frequencies at lower listening volumes.

This  creates  the  effect  of  increasing  the  perceived  amount  of  bass  /  mid 

content in the music when playing the amplifi er at a lower level. This control is 

effective on frequencies between 20Hz and 800Hz and its effect decreases as 

the amplifi er volume level is increased. When the amplifi er volume reaches its 

maximum, the effect this loudness control has is negligible.

To activate this loudness control press the function key (9) four times to change 

the LCD display to the loudness control.

The last setting for loudness will be displayed.

To select the loudness setting turn the rotary control (10) either clockwise or 

anticlockwise to change the setting from on to off or vice versa.

Once  selected,  the  loudness  feature  will  activate  automatically,  there  is  no 

need to press any further buttons to activate this control. 

Following  this  operation,  the  LCD  display  will  return  to  indicate  the  default 

volume setting if no operation occurs within 5 seconds. To reactivate loudness 

control it will be necessary to press the function button again four times.

SPEAKER ON/OFF CONTROL

This amplifi er is fi tted with a loudspeaker control which allows the loudspeakers 

to be turned off when listening through headphones

To  activate  the  speaker  control  press  the  function  key  again  fi ve  times  to 

change the LCD display to the speaker control.

The last setting for the loudspeakers will be displayed.

To change this speaker setting turn the rotary control (10) either clockwise or 

anticlockwise to change the setting from on to off or vice versa.

As the rotary control is turned from on to off and back again, the loudspeakers 

will switch on or off automatically, there is no need to press any further button 

to activate this control. 

Following  this  operation,  the  LCD  display  will  return  to  indicate  the  default 

volume  setting  if  no  operation  occurs  within  5  seconds.  To  reactivate  the 

loudspeaker control it will be necessary to press the function button again fi ve 

times.

10

 


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TROUBLE SHOOTING

PROBLEM

POSSIBLE SOLUTION

No power when switched on • Mains socket not switched on, or faulty.

• Plug not fully inserted into wall socket

• Mains fuse has blown in plug.

• Internal mains fuse has blown inside unit, 

  this will need to be replaced by a qualified 

  service technician

• Power cord has become damaged, this 

  should be replaced immediately by a 

  qualified service technician.

No sound

• Power not turned on.

• Speaker setting is off on function menu 

  (see page 13)

• Volume setting is low (see page 8)

• Loudspeaker cables are not connected 

  (see page 6)

• No input audio equipment is connected, or 

  is faulty (see page 6)

• Correct audio input source not selected on 

  front panel (see page 7)

No sound in one channel

• Balance control set incorrectly (see page 

  11)

• Audio source input cables connected 

  incorrectly, or are damaged. 

•  Audio input source faulty.

• Loudspeaker cables connected incorrectly, 

  or are damaged.

• Loudspeakers are faulty.

Loud buzz or hum

• Audio input cables damaged or not 

  correctly connected.

• Turntable earth lead incorrectly fitted.

• Turntable head shell incorrectly fitted.

• Tape machine sited too close to amplifier, 

  or TV.

PROBLEM

POSSIBLE SOLUTION

Will not play or make tape 

recordings

• Tape input / output connections reversed.

Weak bass, diffused stereo 

image

• Speaker connections out of phase,  

  check + and – terminals are connected to 

  corresponding terminals on both amp and 

  loudspeakers.

Distorted sound

• Frayed wires may be touching on speaker 

  terminals causing distortion.

• Bass and treble controls may be set too 

  high for loudspeaker specification.

• Volume control may be set too high.

LCD display not working

• Internal fault would need servicing by a 

  qualified service technician

LCD display reads ‘Error 1’

• Internal fault would need servicing by a 

  qualified service technician

Audio input source switches 

not working

• Internal fault would need servicing by a 

  qualified service technician

CARE AND MAINTENANCE

To clean the amplifier, wipe the case with a slightly moist lint-free cloth.  Do not 

use any cleaning fluids containing alcohol, ammonia or abrasives. 

Do not spray a aerosol at, or near, the amplifier.

Always use original packaging if it is necessary to transport the unit at any 

time. 

If this unit is used in a dusty environment, it may be necessary to have the 

unit serviced at your local dealer periodically. It is not advisable to allow large 

deposits of dust to accumulate within this unit as it may prevent correct cooling. 

Similarly dust deposits which become damp can sometimes lead to electrical 

problems which may cause severe damage to the delicate electronics within 

this unit.

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SPECIFICATIONS

CONTACT DETAILS

We trust you are completely satisfied with this product from Acoustic Solutions 

Limited, however please feel free to contact us if you experience any difficulties, 

or if you would like to express your views regarding our products.

Please write to:

Acoustic Solutions Limited.

Grand Union Buildings

54 High Street

Weedon Bec

Northampton 

NN7 4QD

United Kingdom

Telephone +44 (0)1327 340601

Fax: +44 (0)1327 342298

www.acousticsolutions.co.uk

 

email: enquiries@acousticsolutions.co.uk

Through the process of continuous improvement, Acoustic Solutions Limited 

reserves the right to change or alter specifications without prior notice. E&OE   

PHONO INPUT

Input impedance

Input sensitivity

47kΩ

3.8mV (to suit magnetic cartridges)

LINE LEVEL INPUTS

Input impedance

Input sensitivity

47kΩ

250mV (Tape/AUX, tuner, DAB)

650mV (CD & DVD)

LINE LEVEL OUTPUTS

Output impedance:

Line out

Headphones

Maximum output level - 

Line out

Headphones

100kΩ

300Ω

740mV

1.25V @ 30Ω

TONE CONTROL ATTENUATION

Treble

Bass

+/- 14dB @ 10KHz (+0,- 3dB)

+/- 14dB @ 100Hz (+0,- 3dB)

POWER OUTPUT

2 x

 

40 watts RMS @ 4Ω

2 x 30 watts RMS @ 8Ω

FREQUENCY RESPONSE

10Hz to 50kHz (-3dB points)

DISTORTION

less than 0.05 @ 1watt

SIGNAL NOISE RATIO (A 

WEIGHTED)

>80dB

CHANNEL SEPARATION

>59dB

VOLTAGE/ POWER 

CONSUMPTION

As specified on rear panel

PRODUCT PHYSICAL 

SPECIFICATIONS

Dimensions in mm (WxDxH)

Net weight

Shipping weight

430x230x80mm(+12mm feet)

5.3Kg

6.5Kg

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