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Arcam One speakers - instructions or owner manual

Discussion in 'classic' started by Operajulian, Oct 19, 2018.

  1. Operajulian

    Operajulian Opera Julian

    Hi there

    Does anyone in Pink Fish land have a copy of ( old ) instructions or owner manual for Arcam One speakers.
    I have a sales brochure and some reviews but I would like to get hold of the instructions.

    And yes it is for nostalgia more than the actual need of how to connect them.

    Thanks
    Julian
     
  2. Operajulian

    Operajulian Opera Julian

    Just reviving this again.
    I did get a reply from Ed in the helpful service team at Arcam/Harman etc about my request for more info on the SA60 and Arcam One combination.
    Sadly he cannot find any scanned docs or manuals from this model in the earlier era other than the A60 user brochure ( which I have loads of ).
    He did say he had even contacted the designer ( John Dawson perhaps ?) to no avail. So if anyone out there has a hand typed owners manual or similar they may have the only one out there !

    Cheers
    Julian
     
  3. Arkless Electronics

    Arkless Electronics Trade: Arkless

    Sales brochure yes (IIRC) but you already have one...
     
  4. cjyosemite

    cjyosemite pfm Member

    You might just check with Ed (again as John Dawson retired some years ago & the support staff have also change a few years ago. I met John Dawson at the (no longer held) Manchester show 7 or 8 years ago & had a discussion with him about their (also discontinued) speakers & cartridges - I had passed a pair of Arcam Two's down to my son. John Dawson told me he had a number of pairs of the One, Two & Three so it seems quite likely he has the manuals as well. You could also check if anyone there now has any contact with Matt Frost who was their service contact for quite some years & he seemed to know everything.
     
  5. Oneandtwo

    Oneandtwo pfm Member

    I wanted a Delta 290P power amp to match my amp 20 odd years ago, Arcam had discontinued them 2-3 years previously however when I rang them I spoke to John Dawson who was very helpful and ended up selling me one of his own.
     
  6. Operajulian

    Operajulian Opera Julian

    Thanks for your replies to date. The very nice Ed from Arcam support did just send an email that he got back from the "designer". Some nice insights from the man involved in the original.

    From Ed: I have a reply from the original designer which should hopefully prove useful:-

    "Wow that's nearly 40 years old! I am not sure why the computer system doesn't have the schematics etc on it and I don't think I have them at home, though I will look. Originally they will have been stored in some kind of A4 binder for access by support/service and if that's been lost we have no records I imagine.

    A group was set up around 1980 to do this and agree levels, pin outs etc so you could use a given speaker with different electronics. It was somewhat pretentiously named ALSO = the Active Loudspeaker Standards Organisation. Original members Arcam, Linn, Naim, Nytech and ARC.

    The active crossover for the Arcam One was designed for the original Arcam Ones that had a set of crossover links on the back with IIIRC 8 terminals in all; this allowed us to bypass the actual crossover components and access the drive units directly by removing bridging metal strips. It will not work (properly) for the later (taller) Arcam Ones that have only 4 terminals on the back as one can't get the passive crossover network out of the signal path. Similarly the ARC speaker had a removable external crossover "brick" - unplugging it exposed the 4 terminals connected to the speaker treble and bass units.

    The crossover board fitted in the SA60 was a universal PCB designed to be configurable by fitting components for one pole crossover slopes (6dB/octave), 2 pole (12 db/octave) and possibly even 3 pole. Again, IIRC, the Arcam One was set up for 2 pole crossover, as was the ARC101. The Tangent was different and I don't recall how, but was possibly linear phase single pole. There will be preset pots on these boards to set up the relative gain between treble and bass (factory set for the right nominal values). Of course you can't change the chosen crossover frequencies for each speaker system without changing parts on the PCB, nor should you need to.

    To get it going one retro-fitted a small A60P board to the A60 at the point of entry to the power amps, i.e. post volume, tone and balance controls. This was fitted with a 5 pin DIN connector with ins and outs from memory and replaced one of the original DIN sockets, probably the 3rd (AUX) socket. This was connected with a 4 way DIN cable to the optional crossover board in the SA60 - it provided a stereo full bandwidth feed to the crossover PCB and a single channel treble and bass (filtered) return to the A60 to drive one loudspeaker. The SA60 then took care of the other channel. I can't remember which amp took care of L and which R!

    That's about as much as I can tell you right now. You need to confirm which Arcam Ones the enquirer has before anything else. Feel free to pass on this email to him.

    It worked pretty well by the way in sonic terms and was only abandoned because we needed to design a new PCB every time a speaker design was modified so it became very complex to support. Linn and Naim kept theirs running for a long time but that was because they had direct control of their own speaker models."

    I did reply to let them have my thanks and that also the Arcam One has nine terminals on the back. The original A60AP drives the left, the SA60 drives the right.
    Happy tinkering and listening. I will let you know when I actually get it powered up.
    Julian
     

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