ifi Retro - LS3.5 Loudspeakers

Home > Loudspeakers > ifi
Stock code: IFIRETROSPEAK


    For more information on any of our products please call us:


    01333 425999


    Our Price: £725.00
    • Product Info
    • BLACK FRIDAY
    • Part Exchange
    • 0% Finance

    Product Information

    The LS3.5 is iFis 3.0 reboot of the classic BBS LS3/5A which is still now, half a century after its launch still in high demand and revered. iFi has taken the design back to its basic underpinnings and then re-engineered the LS3.5 ground-up for the 21st century. From designing the drivers (not OEM) to the cabinet terminals, where we were dissatisfied, we manufactured our own. This is the iFi level of attention to detail.

    The Retro LS3.5 is in many ways a synthesis of the best of the BBC LS3/5A and dash of the Le Petite. We eliminated their respective drawbacks using the very latest technological advancements available. So think of the iFi LS3/5A as BBC LS3/5a+Le Petite with an injection of factor X.

    iFis brand-new tweeter that is smooth as silk, literally

    Silk is smooth, so why not make a tweeter from the ground-up using it at the core? The iFi 28mm tweeter is horn-loaded and uses a neodymium magnet. It is very much a 21st century product that is, at the advanced edge of tweeter technology. The silk dome combines the lack of resonances at the top of the operating range (as found on metal domes) with excellent dynamics in band. The small neodymium magnet structure shifts cavity resonances outside the audible range. Being horn-loaded, it matches perfectly with the wideband driver to create a mammoth sound field.

    The tweeter is used only at the very top end of the audible range; the whole range from 59Hz 8kHz covering the fundamentals of all instruments except those with very low bass notes and all the formants (the tone forming harmonics of instruments) is covered by the wideband driver, without any electrical or mechanical crossover.

    This avoids any damage to the phase/impulse response for this critical range. The simple arrangement of the crossover for the tweeter (first order at appx. 10kHz acoustic crossover) and the tweeters waveguide, which insets it for time-alignment with the wideband driver further preserves phase/impulse response.

    Ground-up paper cone wideband driver

    Natural material for a natural sound. The paper cone 115mm wideband driver by iFi performs more akin to a full-range driver.

    In many ways the wideband driver is very traditional, both magnet and basket. Stamped steel baskets can dissipate energy much faster than cast ones. It harks back to the golden era of driver design in the 1970s. Modern finite element modeling and modern materials have improved the driver in many areas (especially efficiency and bandwidth) over classics like the KEF B-110 which was originally used in the LS3/5A.

    The wideband driver rolls off after 8kHz. And it reaches down to 59Hz (with correct placement).

    Time-Aligned to perfection

    The iFi LS3.5 has a coherency that is based upon the simple fact from the outset, the tweeter and driver are perfectly time-aligned. Simply put, this means if one was looking at a cross-section of the LS3.5, the acoustic centre of the tweeter and the wideband driver as precisely vertically-aligned. This means sound waves from both units arrive at ear of the listener at the same time (as opposed to at different times). This is an oft overlooked weakness of many speakers, but not in the iFi LS3.5.

    Multi-chamber Voigt design with tuned enclosure

    There are two-chambers in one. The enclosure is maybe best considered a variant of multiple reflex, also, by breaking up the larger volume into two smaller different volume/size sections resonance frequencies are spread and tuned to higher frequencies, where the Amino-plastic open cell foam we use for damping has optimal absorption.

    The Acoustic Active Tuning with minimal damping drawn from the musical instrument manufacturing sector further assists with dissipating resonance frequencies higher just think of the LS3.5 as a musical instrument.

    This is why the LS3.5 is a speaker that makes music.

    Bamboo is best

    Bamboo is a grass hence it is a sustainable material and exceptionally environmentally friendly. It is 2x lighter and 3x stronger than wood. The aforementioned Voigt design coupled with the stiff as steel bamboo enclosure and the extra reinforcement by the division plus the acoustic tuning all combined, makes for a remarkably low sonic signature of the box. This is critical as the use of the single paper driver needed for the wide bandwidth cannot be counted upon to block resonances from inside the box passing through the way a heavy and slower plastic cone is able to.

    Hence for environmental and sonic reasons, it made perfect sense to use it as a speaker cabinet material. The LS3.5 is 5x more costly to manufacture than standard MDF cabinets. A simple knuckle tap shows its complete lack of colouration which is easily audible from the first note.

    Advanced Amino-plastic open cell foam

    For the very minimal internal damping duties, we scoured the world for the most advanced acoustic materials and settled on the Advanced Amino-plastic open cell foam material. The open-cell surface guarantees that sound waves are not reflected as an echo but can penetrate the cell structure unhindered. The sound energy is reduced in the cell structure, giving an excellent sound absorption capacity.

    From our listening tests the ability to ensure the deepest and cleanest bass along with a mid-range that is spell-binding placed it heads and shoulders above all others.

    Despite its much higher cost, we just had to have it in the LS3.5.

    Binding posts that carry the signal unhindered

    Leaving no stone unturned, we sourced a binding post that had the purest copper count, had the maximum surface area contact and had to be gold-plated for long-term enjoyment. Rest assured that even the banana speaker connectors we developed from the ground-up!

    The silver-plated copper speaker cables and the gold-plated copper speaker connectors means the sound quality is simply unbeatable and means the LS3/5A can play with the big boys.

    Black Friday Week

    Simply complete the form below and we'll email you a special Black Friday offer for this product. Offers are available Monday 23 until Friday 27.

    Part Exchange

    PAY BY FINANCE

    Click here to request an application form.

    Did you know there are 2 ways to apply?

    Either in store or from the comfort of your own home. We appreciate life is busy, so why not let us make it a little easier for you.

    To apply in store, simply call in to our branch and one of our experienced sales team will guide you through the application.

    To apply at home, just give us a call on 01333 425999 or complete the form below and we can arrange for an application link to be sent to the email address provided, and you can apply with a cuppa in hand.

    You have 3 options to chose from:

    OPTION 1 - Buy Now Pay Later

    Buy now pay later with payments deferred for 12 months

    Spread the cost with our buy now pay later finance available online and in-store.

    Simple buy now pay later finance options allow you to spread the cost of your purchase over 48 months with an agreed deferral period.

    Repayments start 12 months after signing your finance agreement.

    If you settle the outstanding balance before the first repayment is due then we will waive all interest charges and only charge an administration fee of £29.00.

    All you need to do is:

    • Spend a minimum £200

    Representative Example

    • Cash price £900
    • Deposit Nil
    • Loan amount £900
    • 29.8% APR representative
    • Interest rate 21.37% fixed
    • 48 monthly repayments of £38.78

    Total term of loan agreement 48 months, with the first payment deferred for 12 months

    Defer 12 months then 48 monthly payment

    • Total charge for credit £961.44
    • Total amount payable £1861.44

    Pay full amount within 12 months

    • Total charge for credit £29 (early settlement fee)
    • Total amount payable £929

    Interest is calculated from the start of the agreement, which means that interest will accrue during the holiday period, although no payments will be taken for 12 months.

    OPTION 2 - Interest bearing

    Up to 48 months Interest Bearing Finance – 19.9% APR representative.

    Spread the cost with our interest bearing finance available online and in store. Our simple finance options allow you to spread the cost of your purchase over 24, 36 or 48 months.

    All you need to do is:

    Spend a minimum £200. We offer 3 repayment periods to help you spread the cost of your purchases. 24, 36 and 48 months interest bearing finance on orders of £200 and above.

    Representative Example

    • Cash price £900
    • Deposit Nil
    • Loan amount £900
    • 19.9% APR representative
    • Interest rate 10.44% fixed
    • 48 monthly repayments of £26.58
    • Total charge for credit £375.84
    • Total amount payable £1275.84
     

    Loan calculator - Interest Bearing

    Enter the loan amount, select the term and then hit 'Calculate'.

    Loan Amount £
    Loan Length in Months
    Interest Rate % APR
    Monthly Payment £
    This is a close approximation of actual loan repayments if available at the terms entered.
    Full quote will be provided with application.

    OPTION 3 - Interest Free

    Up to 24 months Interest Free Finance – 0% APR representative

    Spread the cost with our interest free finance available online and in store. Our simple finance options allow you to spread the cost of your purchase over 6, 10, 12, 18 or 24 months.

    All you need to do is:

    Spend a minimum £500 and above. We offer 5 repayment periods to help you spread the cost of your purchases. 6, 10, 12, 18 or 24 months interest free finance on orders of £500 and above.

    Representative Example

    • Cash price £900
    • Deposit Nil
    • Loan amount £900
    • 0% APR representative
    • 24 monthly repayments of £37.50
    • Total charge for credit £0
    • Total amount payable £900

    Loan calculator - Interest Free

    Enter the loan amount, select the term and then hit 'Calculate'.

    Loan Amount £
    Loan Length in Months
    Interest Rate % APR
    Monthly Payment £
    This is a close approximation of actual loan repayments if available at the terms entered.
    Full quote will be provided with application.

    Request an application form

    Related Products
    Customer Reviews