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Thread: B&W DM7 Kenneth Grange classic

  1. #11
    Join Date: Apr 2015

    Location: Chipping Norton, UK

    Posts: 58
    I'm Steve.

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    Quote Originally Posted by sumday View Post
    IIRC there is a component or two built in to the crossover to give automatic overload protection for the tweeters.
    These can fail over the years and give the impression of tweeter failure.

    This happened to a pair owned by a friend of mine years ago, B&Ws advice was to simply bypass the suspect parts....and watch the volume.
    Am I right in thinking that the Mk II versions had more sophisticated overload circuitry, which would shut down the overloaded unit and display a warning light in the tweeter housing until reset?
    Is the Mk 1 version just fuse protected?
    I wish I knew what I was doing ....
    www.reesguitars.co.uk

  2. #12
    Join Date: May 2017

    Location: Glasgow

    Posts: 56
    I'm Rohan.

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    I'm pretty sure that is correct.

  3. #13
    Join Date: Jun 2016

    Location: Surfside Beach usa

    Posts: 98
    I'm charles.

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    Yes, the mk1's were fuse protected and the mk2's had the proprietary B &W overload protection. Visually, the MK 1's were stunning with brushed steel top plates to the top of the speakers and matching speaker stand bases in brushed steel. Very expensive looking and beautifully built speakers - they looked stunning with the top mounted tweeter - a stand out design at the time. Very heavy and beautifully finished. The MK2 was slightly 'dumbed down' deleting the stainless steel top and stand base but nevertheless still superb build quality. Unfortunately, in spite of all the high tech involved in this speaker (and the enschewing relative high cost), they were outperformed by speakers costing 25% - 33% at the time - basically speakers from 'box stuffers' - small companies using bought in drivers and crossovers designed in house but contracted out. These companies made nothing themselves but produced some great speakers using bouhht in components. The DM7 was one of B & W 's worst speakers and should be avoided at all costs. Check out the historic HiFi Choice review which slammed it. I remember trying to sell them in the late 70's - early 80's and they performed badly sonically in comparison to similar sized but cheaper competitors from the myriad of smaller 'box stuffer' speaker producers at that juncture in time. If the reader can locate the requisite issue of HiFi choice speaker issue , they will see how many similar sized speakers from small box stuffer operations at that time, completely outperformed the DM7 in MK1 or MK2 form. The only reason for persevering with this under performing speaker is merely for looks - especially the original MK1. Unfortunately, they sounded crap in their day and they sound crap today ( that is if they're still performing to spec which I doubt ANY examples will be due to ferrofluid issues in the tweeters and physical distortion of the kevlar bass/mid drivers which is a well known problem with old B &W kevlar units). Dreamers dream on.

  4. #14
    Join Date: Apr 2015

    Location: Chipping Norton, UK

    Posts: 58
    I'm Steve.

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    57charles,
    After offensive comments contained within your earlier post in this thread I have no desire to interact with you.
    You should re-read your posts before hitting the send button to ensure you are not going to offend anyone.

    Please do not post on any of my topics/threads in the future.
    I have added you to my ignore/block list.
    I wish I knew what I was doing ....
    www.reesguitars.co.uk

  5. #15
    Join Date: Dec 2009

    Location: Hartlepool

    Posts: 79
    I'm John.

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    Here here or should that be hear hear!

  6. #16
    Join Date: Apr 2015

    Location: Chipping Norton, UK

    Posts: 58
    I'm Steve.

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    :
    Quote Originally Posted by Virkon View Post
    Here here or should that be hear hear!
    Thanks John !
    I wish I knew what I was doing ....
    www.reesguitars.co.uk

  7. #17
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 44,880
    I'm Grant.

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    they are pretty good speakers if driven well. need a powerful amp with grip tho. plenty good reviews out there if you look. looking at 2/3k value speaker if made today
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER24, SPOTIFY - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  8. #18
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 78,140
    I'm AudioAl'sArbiterForPISHANTO.

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    Quote Originally Posted by 57charles View Post
    Yes, the mk1's were fuse protected and the mk2's had the proprietary B &W overload protection. Visually, the MK 1's were stunning with brushed steel top plates to the top of the speakers and matching speaker stand bases in brushed steel. Very expensive looking and beautifully built speakers - they looked stunning with the top mounted tweeter - a stand out design at the time. Very heavy and beautifully finished. The MK2 was slightly 'dumbed down' deleting the stainless steel top and stand base but nevertheless still superb build quality. Unfortunately, in spite of all the high tech involved in this speaker (and the enschewing relative high cost), they were outperformed by speakers costing 25% - 33% at the time - basically speakers from 'box stuffers' - small companies using bought in drivers and crossovers designed in house but contracted out. These companies made nothing themselves but produced some great speakers using bouhht in components. The DM7 was one of B & W 's worst speakers and should be avoided at all costs. Check out the historic HiFi Choice review which slammed it. I remember trying to sell them in the late 70's - early 80's and they performed badly sonically in comparison to similar sized but cheaper competitors from the myriad of smaller 'box stuffer' speaker producers at that juncture in time. If the reader can locate the requisite issue of HiFi choice speaker issue , they will see how many similar sized speakers from small box stuffer operations at that time, completely outperformed the DM7 in MK1 or MK2 form. The only reason for persevering with this under performing speaker is merely for looks - especially the original MK1. Unfortunately, they sounded crap in their day and they sound crap today ( that is if they're still performing to spec which I doubt ANY examples will be due to ferrofluid issues in the tweeters and physical distortion of the kevlar bass/mid drivers which is a well known problem with old B &W kevlar units). Dreamers dream on.
    Hi Charles,

    "Dreamers dream on".

    Whilst the rest of the above post is simply your opinion (based on experience), which you're entitled to, the bit in bold is unacceptable, because it's simply an assumption on your part, and also rather insulting to those that comment was aimed at.

    It's really none of your business whether someone is a "dreamer" or not, and so that comment was completely unnecessary, in order for you to have made your point, and only serves to irk anyone whose opinion on the speakers in question is different from yours; one which they're equally entitled to hold.

    You're also just back from a week's ban for behaving in an aggressive and confrontational manner, and here you are again doing precisely the same!

    Therefore, this is your final warning, before the next ban you receive is permanent. In future, please refrain from making provocative remarks towards others, such as those highlighted above, when simply expressing your opinion, as it's unnecessary and doesn't add value to the point you're making (quite the opposite in fact).

    This is a friendly forum, where we treat each other automatically with courtesy, whether we agree with each other or not, and that's how *I insist* people behave here, so please remember that in future. Also note that this warning is not up for debate, discussion or any form of challenging (and so any responses from others or you, in that respect, will be deleted).

    Therefore simply read the warning you've been given, and comply accordingly. Cheers!

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

    BE HAPPY EVERYDAY!

  9. #19
    Join Date: Apr 2015

    Location: Chipping Norton, UK

    Posts: 58
    I'm Steve.

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    Quote Originally Posted by Marco View Post
    Hi Charles, This is a friendly forum, where we treat each other automatically with courtesy, whether we agree with each other or not, and that's how *I insist* people behave here, so please remember that in future.
    Thanks Marco .... all this malarkey is causing my tinnitus to play up something rotten
    I wish I knew what I was doing ....
    www.reesguitars.co.uk

  10. #20
    Join Date: Feb 2018

    Location: Hampshire

    Posts: 14
    I'm Andy.

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    Hi Steve. I have taken the plunge myself and bought a pair of DM7 Mk1's. I'm now facing the same challenge of finding something to drive them..
    I ve looked at loads of stuff but just feel I need more power.. much more power. Maybe a musical fidelity a5..? I am tempted to find something vintage to join them. I am on a budget though. I'd be interested to know where your amp search has taken you so far!
    Always loved these speakers! 😀

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