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Acoustic Energy Loudspeaker Linear 1 User Manual

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    							O W N E R ’ S   M A N U A L
    Linear 1 Rev G11/4/05, 3:46 pm1 
    							Page Section
    1 1 Introduction
    1 2 Handling
    1 3 Installation
    2 4 Positioning
    3 5 Connecting
    4 6 Amplifiers
    4 7 Listening
    4 8 Specification
    5 9 The Linear Range
    5 10 Warranty
    5 11 Contact Acoustic Energy
    1 .   I n t r o d u c t i o nC o n t e n t s
    Linear 1 Rev G11/4/05, 3:46 pm2 
    							Page 1
    1 .   I n t r o d u c t i o n
    2 .   H a n d l i n g
    Welcome to the Linear One. Perhaps more than 
    any other hi-fi product, speakers are sensitive to 
    installation so please take a little time to read 
    this manual and to follow, as far as practical, 
    the installation guidelines it contains. Careful 
    installation will help ensure that your Linear Ones 
    perform optimally. Should you have any questions 
    not covered here we are happy to try and answer 
    them either by telephone or email. Contact 
    information can be found in Section 11.
    Following this introduction, the Manual is divided 
    into sections covering handling, installation, 
    positioning, amplifier compatibility, connection, 
    listening, matching products, specifications, 
    warranty and contact information. We recommend 
    that you read at least the first five of these sections 
    carefully before installing and using your Linear 
    The Linear One is a relatively delicate precision engineered product that can 
    be damaged by inappropriate handling. Please take care when unpacking or 
    moving the speakers not to touch either of the drivers. Damage to a driver 
    will at best degrade a Linear One’s performance and at worst result in its 
    complete failure.
    The enclosure surfaces should also be handled sympathetically. Any cleaning 
    should only require a soft cloth, slightly dampened if necessary. Be wary of 
    using any polishes or solvent based cleaning agents.
    The packaging should be retained for future use.
    3 .   I n s t a l l a t i o n
    The Linear One is intended to be used mounted on speaker floor-stands 
    relatively clear of room boundaries. Alternative mounting arrangements 
    such as wall brackets are possible although these may result in reduced 
    performance. If wall brackets are to be used they should be as rigid as 
    possible and firmly attached to brick-built walls.
    The construction style, rigidity and dimensions of the floor-stands are of 
    critical significance to the performance of the Linear One. Stands should 
    broadly follow the specification below. Your retailer or distributor will be able 
    to offer advice.
    Recommended Floor-stand Specification.
    Construction Style:  Direct coupled multi-pillar.
    Mass Loading:   Preferred.
    Overall height:    0.50 - 0.65 m (Linear One top panel to be just 
    below head height when seated).
    Top plate Dimensions
    Minimum width:     140 mm
    Maximum width:   190 mm
    Minimum depth:   190 mm
    Maximum depth:   250 mm
    Top plate interface:  Direct coupled tri-point or damped-compliance.
    Floor interface:   Floor spikes (M6 minimum).
    C o n t e n t s
    Linear 1 Rev G11/4/05, 3:46 pm1 
    							Page 2
    4 .   P o s i t i o n i n g5 .   C o n n e c t i n g
    The position of speakers within the listening room is likely to have more 
    influence over their performance than any other aspect of their installation. 
    It is worth spending some time experimenting both with the finer points of 
    speaker positioning, as well as the larger scale issues of room layout.
    If you are already familiar with the acoustic characteristics of your listening 
    room, and the way speakers perform in it, you may already have a good feel 
    for where to position your Linear Ones. However, installing any new hi-fi 
    component provides a good opportunity to review an existing set-up and 
    perhaps make improvements.
    The position requirements for a pair of Linear Ones installed in an average 
    sized and furnished listening room (say 4m x 5m) are as follows:
    •    Between 0.3 and 1.0 metres from the rear wall.
    •    1.0 metres from side walls.
    •    Between 2.5 and 3.5 metres apart.
    •    Clear of corners.
    •     Angled inward towards the listening position.
    Don’t worry if, thanks to the architecture or layout of your room, it is 
    not practical to follow each requirement. The most important thing is to 
    experiment with the different options that are practical and find the one that 
    works best.
    While it is often the first instinct to position a pair of speakers against the 
    shorter wall of a rectangular room, it is often the case that a position against 
    the longer wall will produce better results. This is because the long wall 
    position tends to result in less prominent reflections from the side walls of the 
    room. However, whether used against the long or short wall, it is important 
    D i a g r a m   O n e
    that each speaker of the pair is located in a similar 
    acoustic environment (different environments 
    would be, say, a curtained area and a solid wall). 
    The acoustic character of the side walls of the room 
    in the area where the main reflection between 
    speakers and listening position will occur should 
    also be similar. Diagram One illustrates a typical 
    Once your Linear Ones are connected (see Section 
    5) and working, and you begin to become familiar 
    with their performance, it is likely to be worthwhile 
    experimenting a little more with their positioning.
    Reducing the distance between the speakers and 
    the rear wall will increase the level of bass and 
    low midrange making the speakers sound warmer. 
    The warmth however is likely to be gained at the 
    expense of some mid-range clarity and stereo image 
    focus and depth. Increasing the toe-in angle of the 
    speakers may regain some image focus but again 
    this is likely to be at a cost of image width and 
    openness. Learning through experimentation how 
    Linear Ones behave in your room will help you find 
    the optimum solution.
    The Linear One is magnetically shielded and can be 
    used in relatively close proximity to CRT screens.
    3.0 metres
    angle inward
    Listening position
    0.5 metres from back wall  
    Reflection region. Keep similar each side.
    Linear 1 Rev G11/4/05, 3:46 pm2 
    							Page 3
    4 .   P o s i t i o n i n g5 .   C o n n e c t i n g
    Connecting your Linear Ones to an amplifier is 
    fundamentally a simple process, however, there are 
    some choices to be made and issues to consider 
    concerning connection mode, connectors and 
    cable type.
    Each Linear One is fitted with two pairs of 
    binding-post terminals - one pair each for the 
    low frequency and high frequency drivers. Two 
    pairs of terminals enables Linear Ones to be 
    connected conventionally (single wire), bi-
    wired or bi-amplified. As supplied, the high and 
    low frequency terminals are connected together 
    by metal shorting links ready for conventional 
    The terminals can accept either stripped wires, 
    spade connectors, or 4mm plugs. Each of these 
    termination methods is potentially equally effective 
    and the choice is likely to be influenced by type of 
    speaker cable used. Your dealer, distributor or cable 
    manufacturer will be able to offer advice.
    Conventional [single wire] connection
    Conventional connection requires that the shorting links remain in place 
    between the high and low frequency terminals. Simply connect the speaker 
    cable to either pair of terminals ensuring correct connection polarity as 
    described below.
    Bi-Wire Connection
    Bi-wiring separates the low and high frequency connections and can provide 
    enhanced sound quality. A second set of cables (or alternatively, a multi-way 
    bi-wire cable) is required. The shorting links should be removed and stored for 
    any subsequent single wire use.
    The two cables for each speaker should be connected in parallel to the 
    amplifier terminals. At the speaker, one cable should connect to the high 
    frequency terminals and one to the low frequency terminals. Ensure correct 
    connection polarity as described below.
    Bi-Amplifier Connection
    Bi-amplifier connection adds a second power amplifier to the system so that 
    high and low frequency sections have dedicated amplifiers. Significantly 
    enhanced sound quality is possible. One stereo amplifier should be connected 
    to the high frequency terminals of each speaker and a second stereo amplifier 
    connected to the low frequency terminals. The shorting links should be 
    removed and stored for any subsequent single wire use. Ensure correct 
    connection polarity as described below. Follow the amplifier manufacturer’s 
    guidence on connecting the amplifier input signals.
    The shorting links must be removed for bi-amplifier connection. Failure 
    to do so will likely result in damage to the amplifiers.
    Connection Polarity
    It is important when connecting speakers to ensure that each terminal is 
    connected with the correct polarity. Positive speaker terminals should always 
    be connected back to amplifier positive terminals, and negative speaker 
    terminals connected back to amplifier negative terminals. Performance will be 
    seriously degraded if connections are made with incorrect polarity.
    Take care when connecting cables not to touch the negative and positive 
    terminals together and “short-circuit” the amplifier. Make connections with 
    the amplifier switched off.
    Choice of cable type will be influenced by the characteristics of other 
    components in your hi-fi system and your dealer or distributor will be able to 
    advise. Even so, there are some simple guidelines to consider:
    •  Cable runs to each speaker should be kept as short as possible 
    consistent with each being of equal length. 
    •  Short cable runs are especially important if the cable is of relatively small 
    •  If the cable is advertised as “directional” care should be 
    taken to ensure that its orientation is as recommended.
    Linear 1 Rev G11/4/05, 3:46 pm3 
    							Page 4Page 4
    6 .   A m p l i f i e r s9 .   T h e   L i n e a r   R a n g e
    It is wise before listening to your Linear Ones to make one final check of the 
    cables and connections. If all appears well begin listening at a relatively low 
    level to confirm that the system is operating as expected. Only increase the 
    volume if you are happy that the sound at low levels is fundamentally as 
    expected. If you are unhappy, turn the system off and re-check all the cables 
    and connections.
    Linear Ones may take a little time to “run-in”, and similarly the system will 
    also perhaps take some time to reach normal operating temperatures. It is 
    unwise therefore to make rapid judgements about the performance of the 
    speakers. Your ears too will take some time to adjust to the new sound, so 
    revisiting the system set-up, speaker positioning especially, is best left for a 
    few days.
    7 .   L i s t e n i n g8 .   S p e c i f i c a t i o n
    Type: Two-way, reflex loaded, time aligned 
    Bass/Mid Driver: 130mm pressed alloy cone with 
    32mm thermally bonded voice coil. Shielded high-
    power long-throw magnet system.
    HF Driver: Pre-coated textile dome with ferro-fluid 
    cooled neodymium magnet system.
    Filter Network: Symmetrical 3rd order at 3.5kHz.
    Cabinet: 15mm MDF carcass with composite layer 
    front panel and driver de-coupling.
    Frequency Response: 50Hz to 28kHz ±3dB 
    Frequency Range: 30Hz to 28kHz @ -6dB 
    Power Handling: 120W peak programme
    Amplifier Compatibility: 25 - 120 Watts into 8 
    Nominal Impedance: 8 Ohms 
    Sensitivity: 89dB for 1 Watt at 1 metre
    Dimensions (H x W x D): 363 x 192 x 260mm 
    Weight: 7 kg (single, unpacked)
    Acoustic Energy reserves the right to modify 
    product specifications.
    The Linear One is a relatively high sensitivity speaker that does not require a 
    generously rated power amplifier for adequate volume levels to be achieved 
    in an average listening room. A minimum of 25 and maximum of 120 Watts 
    into 8 Ohms per channel is recommended. Linear Ones offer a relatively easy 
    load to the amplifier and do not make unusually heavy demands on its power 
    No overload protection systems are fitted to the Linear One so it is possible 
    to cause damage through over-driving. Such damage can occur whatever 
    the power rating of the amplifier and is not covered by any warranty. If ever 
    the sound at high volumes becomes distorted your Linear Ones are at risk of 
    damage. In such circumstances the volume must be reduced.
    Linear 1 Rev G11/4/05, 3:47 pm4 
    							Page 5
    6 .   A m p l i f i e r s9 .   T h e   L i n e a r   R a n g e
    8 .   S p e c i f i c a t i o n
    1 0 .   W a r r a n t y
    1 1 .   C o n t a c t
    The Linear One is part of a range that includes 
    the Linear Three floor-stand speaker, the Linear 
    Centre centre channel speaker and the Linear Sub 
    active sub-woofer.
    Linear One, Linear Three and Linear Centre 
    incorporate time-aligned drivers to improve image 
    quality, depth and focus.
    Linear Three
    Linear Three is a true three-way floor stand speaker 
    that builds on the performance of the Linear One 
    with wider bandwidth, higher power handling and 
    enhanced detail resolution.
    Linear Centre
    Linear Centre is a centre channel speaker designed 
    to combine with the Linear One or Three for 
    perfectly matched audio-visual systems.
    Linear Sub
    Linear Sub is an active sub-woofer perfect for 
    enhancing Linear One bass performance or 
    handling the low frequency effects channel in 
    Linear audio-visual systems.
    Your Acoustic Energy speakers are guaranteed against original defects in 
    materials, manufacture and workmanship for 3 years from the date of 
    Under this warranty Acoustic Energy agrees to repair any defect or, at the 
    company’s discretion, replace the faulty component(s) without charge for 
    parts or labour. This warranty does not imply any acceptance by Acoustic 
    Energy or its agents for consequential loss or damage and specifically 
    excludes fair wear and tear, accident, misuse or unauthorised modification.
    This warranty is applicable in the United Kingdom only and does not in any 
    way limit the customer’s legal rights. Claims and enquiries under the warranty 
    for Acoustic Energy products purchased outside the UK should be addressed 
    to the local importers or distributors. If you have reason to claim under the 
    warranty please contact your dealer in the first instance.
    Please retain all original packaging materials for possible future use. We 
    suggest that you complete details of purchase now and keep this information 
    in a safe place for future reference.
    Purchase Date:
    Serial Numbers:
    Acoustic Energy Limited
    16 Bridge Road
    Gloucestershire GL7 1NJ
    Tel:  +44 (0)1285 654432 (Sales)
     +44 (0)1285 656890 (Technical)
    Fax:  +44 (0)1285 654430
    Email: [email protected]
    Web:  www.acoustic-energy.co.uk
    Linear 1 Rev G11/4/05, 3:47 pm5 
    							Acoustic Energy Limited, 16 Bridge Road, Cirencester, Gloucestershire GL7 1NJ.
    Tel: +44 (0)1285 654432 (Sales), +44 (0)1285 656890 (Technical). Fax: +44 (0)1285 654430
    Email: [email protected]
    Web: www.acoustic-energy.co.uk
    Manual Part No. MA1101
    Linear 1 Rev G11/4/05, 3:47 pm6 
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