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PMC twenty5i Series User Manual

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User guide
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Hand built by

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Summary of Contents for PMC twenty5i Series

  • Page 1 User guide Hand built by...
  • Page 3 This records the purchase of your loudspeakers and provides you, the customer an opportunity to make suggestions and provide feedback directly to PMC. To gain your 20 warranty your product must be registered with us within 10 days of purchase.
  • Page 4 twenty5.21i in Diamond black...
  • Page 6 It’s relatively easy to create loudspeakers that colour or flatter music — but that has never been our way. The quest for sonic neutrality and transparency has always been PMC’s obsession, using advanced engineering to reproduce music as vividly and faithfully as possible. Our designs are involved in every stage of music-making, from the recording studio to listening at home.
  • Page 7 CONGRATULATIONS – YOU HAVE JOINED THE ELITE You have joined the elite. You’re a Stevie Wonder UNIVERSAL MUSIC GROUP PMC user. ESPN Our loudspeakers can be found in all Thomas Newman the world’s best listening environments, from audiophile living rooms...

  • Page 8: Table Of Contents

    PMC’s ATL (Advanced Transmission Line) Laminair Our meticulous attention to detail Unpacking Installing the resonance-absorbing plinth bars Dedicated twenty5i series stands Connections - plugging them in Running in or breaking in Positioning Fine tuning for perfect bass Stereo set up Surround sound specific set up Ideal 5.1 surround sound set up...

  • Page 9: Tip

    PMC has made efforts to provide accurate installation information and good quality fixings. PMC will not be held responsible or liable for injuries or property damage – direct, indirect or consequential – arising out of use or inability to use this product safely and properly.

  • Page 10: Advanced Transmission Line

    Advanced Transmission Line The source of PMC’s legendary natural and wholly realistic sound is the Advanced Transmission Line (ATL ) bass-loading technology. is an ingenious design which uses energy generated by the bass unit in a much more intelligent and efficient way than speaker designs based on ported or sealed boxes.
  • Page 11 Laminair aerodynamic vent. The ATL design involves air moving under pressure at high speeds, and PMC’s Head of Design, Oliver Thomas was able to apply aerodynamic principles transferred from his previous industry, Formula 1 to the ATL concept.

  • Page 12: Tip

    OUR METICULOUS ATTENTION TO DETAIL All PMC loudspeakers are designed and hand-built in the U.K. using individual components that are matched to our reference model; this includes the structural integrity of every cabinet and the testing and recording of each component.
  • Page 13 UNPACKING Please retain your packaging for future use as all PMC cartons are durable, reusable and can be employed to safely transport your loudspeakers should they be relocated or returned for servicing. Much of the packing is constructed from recyclable materials, so if you are to dispose of it please do so in an environmentally friendly manner.
  • Page 14 TAKE CARE WHEN UNPACKING – THERE ARE DELICATE TERMINALS ON THE REAR OF THE CABINET...
  • Page 15 Re-packing When re-packing all twenty5i series models ensure the grilles are in their protective bags and attached to the cabinet.
  • Page 16 STEADY THE LOUDSPEAKER CABINET WHILE REMOVING THE CARTON...
  • Page 17 Re-packing When re-packing twenty5i series models ensure the grilles are in their protective bags and attached to the cabinet. TAKE CARE WHEN UNPACKING – THERE ARE DELICATE TERMINALS ON THE REAR OF THE CABINET...

  • Page 18: Tip

    INSTALLING THE RESONANCE-ABSORBING PLINTH BARS Plinth bars and spikes are provided to enhance performance and stability. They attach to the base of each speaker using M8 bolts and are isolated from both the cabinet and floor by isolator rings of a very specific compliance. Ensure isolator rings are placed in the rebates in the plinth bars.
  • Page 19 Stand Features • Unique, damped, 3-layer sandwich construction. • Mass fill-able – sand or shot. • Built-in cable management. • Essential to complete the dynamic twenty5i series look. Stand Dimensions H 599mm +25mm spikes W 229mm D 364mm...

  • Page 20: Tip

    It is of vital importance to observe the polarity markings and maintain positive-to-positive and negative-to-negative connections from amplifier or receiver to the loudspeaker. The twenty5i series terminals are colour-coded to aid in their identification: positive terminals are red, negative terminals are black.
  • Page 21 RUNNING IN OR BREAKING IN HOURS When loudspeakers are new they will take time to reach their full potential. It is often debated whether any solid-state equipment, such as CD players or transistor-based power amplifiers change with use, but the characteristics of mechanical devices such as loudspeakers do alter and improve their performance significantly after a short ‘running in’...
  • Page 22 With their unique ATL Advanced Transmission Line design, wide dispersion, ultra low distortion and smooth bass roll-off, PMC loudspeakers are more forgiving of difficult room conditions and placement constraints than conventional designs so you will be able to achieve a superb sound throughout the room with little effort.
  • Page 23 POSITIONING • Place the speaker so the front face is slightly forward of any large object that protrudes into the room – eg. a fireplace, bookcase or television. TIP – See stereo set up diagram • Ensure that stereo pairs of loudspeakers are equidistant from the listening position.

  • Page 24: Fine Tuning For Perfect Bass

    FINE TUNING FOR PERFECT BASS Bass / LF (Low Frequency adjustment) Solid boundaries (i.e. walls, ceilings and floors) reflect sound and help to contain it within a room. They make a speaker sound louder the closer they are to them, especially in the low frequency (bass) region.

  • Page 25: Stereo Set Up Tip

    STEREO SET UP...

  • Page 26: Surround Sound Specific Set Up

    SURROUND SOUND SPECIFIC SET UP 5.1 Systems The twenty5i series has been designed for perfect multi channel music or movie playback and the following diagrams display the ideal layout for the speakers. TIP – No doubt the constraints of room size and shape will vary the distances from the listener to the speakers.

  • Page 27: Ideal 5.1 Surround Sound Set Up

    IDEAL 5.1 SURROUND SET UP TIP – Four soft, self-adhesive feet are included with the twenty5.Ci. These can be attached to the base of the unit to provide vibration-free operation.

  • Page 28: Ideal 7.1 Surround Sound Set Up

    IDEAL 7.1 SURROUND SOUND SET UP For the Dolby Atmos system height channels are required. We produce a range ™ of products to accommodate this. See www.pmc-speakers.com...

  • Page 29: Service

    For any issues that might arise, or for advice and service requirements, the primary point of contact should be your knowledgeable and authorised PMC dealer/distributor. If you do not have a local representative please see www.pmc-speakers.com and click on ‘where to buy’.

  • Page 30: Specifications

    Ferrofluid cooled, with 34mm surround and dispersion grille Crossover freq 1.7kHz Input connectors 1 pair custom, PMC, Rhodium plated 4mm binding posts Dimensions H 340mm (13.4”) W 162mm (6.4”) D 284mm (11.2”) including binding posts (+ 9mm grille) Weight 6kg (13.2lbs)
  • Page 31 Recommended amp power 30 - 150W Effective ATL 2.4m (7.8ft) ™ Impedance 8 Ohm Drive units LF PMC twenty5i series 5.5” / 140mm long-throw cone with cast alloy chassis g-weave ™ ® HF PMC/SEAS , 19mm twenty5i series, SONOMEX fabric ™...
  • Page 32 Recommended amp power 30 - 200W Effective ATL 1.8m (5.9ft) ™ Impedance 6 Ohm Drive units LF 2 x PMC twenty5i series 5.5” / 140mm long-throw cone with cast alloy chassis g-weave ™ ® HF PMC/SEAS , 19mm twenty5i series, SONOMEX fabric ™...

  • Page 33: Warranty Online

    Register within 10 days to unlock 20 year warranty your Visit pmc-speakers.com and click on register a product If you do not have access to the internet fill in the warranty form found on pages 35 & 36 and post it to us.

  • Page 34: Tip

    Do not return a product to PMC without firstly contacting our technical dept. If the product must be returned for service you will be issued with a ‘Returns Authorisation Number’. If a product is returned to PMC and subsequently is found to have no fault or a non-warranty fault it will be subject to a minimum of £50.00 plus the carriage for its return.

  • Page 35: Tip

    WARRANTY CERTIFICATE - PART 2 Our Copy Please complete and return this section to us – or simply complete the online registration at www.pmc-speakers.com and click on register product. Product Serial nos Date of purchase Purchased from Your name Your email address...
  • Page 36 We value all our client’s comments. Please take a moment to help us improve: Please tell us how your new PMC’s perform. Your comments may appear on the customer quotes section for this product on our site. N.B. Don’t worry the comments will be anonymous;...

  • Page 37: Inspection Certificate

    Impedance - frequency Pair matching Listening test 1 Listening test 2 Final inspection Accessory pack User Guide All the above has been carefully checked by the builder of your twenty5i series loudspeakers detailed on the front of this user guide.
  • Page 38 This document should not be construed as a commitment on the part of The Professional Monitor Company Limited (PMC). The information it contains is subject to change without notice. PMC assumes no responsibility for errors that may appear within this document. Information subject to change.

This manual is also suitable for:

Twenty5.21iTwenty5.22iTwenty5.23iTwenty5.24iTwenty5.26iTwenty5.ci

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