Page 2 of 2 FirstFirst 1 2
Results 26 to 42 of 42
  1. #26
    Audio Enthusiast
    Join Date
    May 2003
    Location
    Duarte, California
    Posts
    346
    I got the new 30mF Obbligato caps today. this time they were boxed neatly and arrived intact. This time they were not examined by my local post office.

    I wired them in Parallel with the existing 22mF caps that were already in the crossover.
    Theoretically, this should drop the crossover point from ~1100 back down to around 800 which closer to the OEM crossover point.

    My first impression is that the high frequencies moved forward in the soundstage. There is a lot more fine detail including more delicately pronounced percussive instruments, strings have a much cleaner tonality, and I can hear tiny extraneous background noise that was present during the recording session. Such things as the breathing of an artist or the sound of a bow hitting the strings brings new vitality into a recording.

    The much more apparent decay as the sound trails off into the stage adds much air and space to the overall presentation. Voices are still up front and center.

    I'm going to let these latest changes settle and burn-in but I'm already enjoying the transformation. The improvement thus far is dramatic. They don't sound anything like the humble little SMGs I had four weeks ago.

  2. #27
    Bill L
    Join Date
    Jan 2006
    Location
    Southern Pennsylvania
    Posts
    185

    Nice Job

    Nice job all around Squeegy. I like your project boxes too. I guess I'll have to get to work on making some for mine. I probably won't be tinkering with my 1.6's much, although,if I do anything more, I'd probably try bypassing the fuse (think I'll mull over that one a bit).

    Maybe your success might sway Feanor into taking the plunge with his 1.6's.

    Tx,
    Bill
    Music:
    Magnepan 1.6 QR's, upgraded xovers
    B&K 125.2 reference amp
    SONY SACD 2000ES
    Technics direct drive TT

    HT:
    Yamaha RX-V2500 receiver
    Bang&Olofsun Penta Surrounds
    SONY Bravia 46" HD LCD

  3. #28
    Shostakovich fan Feanor's Avatar
    Join Date
    Jun 2002
    Location
    London, Ontario
    Posts
    8,127
    Quote Originally Posted by bubslewis
    ...

    Maybe your success might sway Feanor into taking the plunge with his 1.6's.

    Tx,
    Bill
    It might at that! Congrats, Squeegy.

  4. #29
    Audio Enthusiast
    Join Date
    May 2003
    Location
    Duarte, California
    Posts
    346
    I was very VERY close to starting another project as a pair of MG-1s showed up near my home for sale for $99 on eBay. I contacted the seller who told me the speakers were in working order but no highs present from one side. The previous owner supplied a factory repair kit which was included in the sale but never installed. From the photos, the kit looked like a replacement air coil inductor and some misc connectors. Since these are very similar to my SMGs, my thought was approach the MG-1s in the same manner as my current speakers.

    Someone ended up buying them for which I am thankful. I've already got several projects on my work bench which are still yet incomplete.

  5. #30
    AR Newbie Registered Member
    Join Date
    Oct 2004
    Posts
    4
    Quote Originally Posted by squeegy200
    Bill,
    You are very observant!
    Peter Gunn discusses this at length in his postings and one his webpage. On my SMGs the OEM spec is 50mf. He actually started experimenting with a value of 10mf and worked up in increments. He posts the theoretical response curves for each in the discussion. He settled at 20mf for subjective reasons on the SMGa.

    I am going to start at his ending point and work my way to the OEM value.

    He also discusses at length the soldering points and how he dealt with those. There is detail on how he removed the socks and rewired. His website has several pictures and how he actually applied some of the same modifications to the other models in the Magnapan line.

    I did not pay attention to the discussions of the other models. However, I remember him stating that he adamantly preferred the simpler SMG crossover applied to the larger models vs the OEM configuration.
    Mine are original SMG,s spec is 17uf....

  6. #31
    Bill L
    Join Date
    Jan 2006
    Location
    Southern Pennsylvania
    Posts
    185
    [QUOTE=squeegy200]To my astonishment, upon closer inspection, my crossover wiring is unlike the SMGa of Peter Gunn. Its not even close to the SMG diagrams on the MUG user group site. I was perplexed at what to do last night.

    Then I looked at Peter Gunns site once more and discovered my SMGs are wired similarly to the newer MMGs. As Bill noted, some of the tweeters on the newer panels have been reversed. The MMG solution worked.[/QUOTE
    ]

    I just got around to checking out Peter Gunn's website and I immediately saved his descriptions and very thorough instructions on re-attaching coils that came loose. My Maggies are only 4 years old and I'm pretty sure the coils are in good shape, but I'm sure glad I read Gunn's article for down the road. Everybody that owns Maggies should save this article. http://www.integracoustics.com/MUG/M...nn/repair.html

    Bill
    Music:
    Magnepan 1.6 QR's, upgraded xovers
    B&K 125.2 reference amp
    SONY SACD 2000ES
    Technics direct drive TT

    HT:
    Yamaha RX-V2500 receiver
    Bang&Olofsun Penta Surrounds
    SONY Bravia 46" HD LCD

  7. #32
    AR Newbie Registered Member
    Join Date
    Oct 2004
    Posts
    4
    [QUOTE=bubslewis]
    Quote Originally Posted by squeegy200
    To my astonishment, upon closer inspection, my crossover wiring is unlike the SMGa of Peter Gunn. Its not even close to the SMG diagrams on the MUG user group site. I was perplexed at what to do last night.

    Then I looked at Peter Gunns site once more and discovered my SMGs are wired similarly to the newer MMGs. As Bill noted, some of the tweeters on the newer panels have been reversed. The MMG solution worked.[/QUOTE
    ]

    I just got around to checking out Peter Gunn's website and I immediately saved his descriptions and very thorough instructions on re-attaching coils that came loose. My Maggies are only 4 years old and I'm pretty sure the coils are in good shape, but I'm sure glad I read Gunn's article for down the road. Everybody that owns Maggies should save this article. http://www.integracoustics.com/MUG/M...nn/repair.html

    Bill
    He has some good info. However if you plan on a rewire in the future, I wouldn't use DAP, as it works too well, and you will probably never get the wires off the Mylar without destroying it.
    The 77 is merly used to hold the wires till you put the final and REAL adhesive on, that now being 3M 30NF.
    Check out Alex's forum on a Maggie rewire, he uses a 12 volt power supply to magnetize the wires, and using the magnets in the speakers to hold them down.
    2 benefits-#1 they are still repairable, and #2 you are putting less goop on the Mylar diaphrams, probably improving their speed/sound characteristics.

  8. #33
    AR Newbie Registered Member
    Join Date
    Jul 2010
    Posts
    1
    Hi Squeegy - After reading your postings on your xover upgrades I would like to know what values you ended up with for your xovers. I am considering upgrades to both my 1.5's and my MMG's.

  9. #34
    AR Newbie Registered Member
    Join Date
    Jan 2012
    Posts
    1
    Mate are you around to discuss your Maggie crossover components? Just want to know what you bought and where from. I've a pair of MMGs.
    Ta

    Adam

  10. #35
    Phila combat zone JoeE SP9's Avatar
    Join Date
    Jun 2003
    Location
    Philadelphia, PA
    Posts
    2,705
    See the link below for any questions you may have about anything Magnepan.

    MUG : Magnepan Users Group
    ARC SP9 MKIII, VPI HW19, Rega RB300
    Marcof PPA1, Shure, Sumiko, Ortofon carts
    Marantz CD63SE, Yamaha DVD-S1800
    DAC's: MSB Link, Behringer UCA222, Emotiva XDA-2, HiFimeDIY, Accuphase T101 tuner, Teac V-7010
    Emotiva UMC-200 processor, 2 Adcom GFA-545, 2 modified Dynaco MK3's, 2 bridged Crown XLS-402, Behringer CX2310, DBX223sx, Behringer DSP1124P,2 12" Transmission Line Subs (PASS DIY El-Pipe-O), Magnepan 1.7 (fronts), Acoustat Model 1 ESL's/SPW-1 Woofer (rears)

  11. #36
    Audio Enthusiast
    Join Date
    May 2003
    Location
    Duarte, California
    Posts
    346
    Quote Originally Posted by thebaudelaires View Post
    Mate are you around to discuss your Maggie crossover components? Just want to know what you bought and where from. I've a pair of MMGs.
    Ta

    Adam
    Apologies for not being around much. I actually did arrive at a final configuration that was pleasing to my ears.

    I used Obbligato Caps and the Jantzen AirFoil as the components and placed them into a generic project box. I will dig out the paper work and let you know where I sourced them. I'm very curious as some have used as an alternative the Solen caps for a different voice with similarly pleasing results.

    These past few months, I've gathered the courage to dive deeper and reproduced the entire Peter Gunn modification with my humble SMGs

    For example, I fabricated these boxes using poplar wood to serve as the final housing for the finalized crossover modification.




    My woodworking skills and craftsmanship are nowhere near the skill level of Peter Gunn. However, despite my amateurish attempt at "Gunning" my own Maggies, the audible improvements are far beyond my expectations.
    Preamplifier: Apt Holman Preamp 1
    Amplifier: Carver TFM 45
    Speakers: Magnaplanar SMG (1982) with Peter Gunn 1st order crossover upgrade
    Disk Player: OppoDigital DVH-71
    Turntable: SystemDek IIx Profile II tonearm, Grado Reference Platinum, Oracle Groove Isolator mat
    Phono Stage: Modified Michael Yee PFe-1

  12. #37
    Forum Regular blackraven's Avatar
    Join Date
    Nov 2006
    Location
    St. Paul, Minnesota
    Posts
    5,421
    Very nice work there S200! Maybe some day I will mod my 1.6's.
    Pass Labs X250 amp, BAT Vk-51se Preamp,
    Thorens TD-145 TT, Bellari phono preamp, Nagaoka MP-200 Cartridge
    Magnepan QR1.6 speakers
    Luxman DA-06 DAC
    Van Alstine Ultra Plus Hybrid Tube DAC
    Dual Martin Logan Original Dynamo Subs
    Parasound A21 amp
    Vintage Luxman T-110 tuner
    Magnepan MMG's, Grant Fidelity DAC-11, Class D CDA254 amp
    Monitor Audio S1 speakers, PSB B6 speakers
    Vintage Technic's Integrated amp
    Music Hall 25.2 CDP
    Adcom GFR 700 AVR
    Cables- Cardas, Silnote, BJC
    Velodyne CHT 8 sub

  13. #38
    Phila combat zone JoeE SP9's Avatar
    Join Date
    Jun 2003
    Location
    Philadelphia, PA
    Posts
    2,705
    Very nice work on those crossovers. I like the handles on the covers!
    ARC SP9 MKIII, VPI HW19, Rega RB300
    Marcof PPA1, Shure, Sumiko, Ortofon carts
    Marantz CD63SE, Yamaha DVD-S1800
    DAC's: MSB Link, Behringer UCA222, Emotiva XDA-2, HiFimeDIY, Accuphase T101 tuner, Teac V-7010
    Emotiva UMC-200 processor, 2 Adcom GFA-545, 2 modified Dynaco MK3's, 2 bridged Crown XLS-402, Behringer CX2310, DBX223sx, Behringer DSP1124P,2 12" Transmission Line Subs (PASS DIY El-Pipe-O), Magnepan 1.7 (fronts), Acoustat Model 1 ESL's/SPW-1 Woofer (rears)

  14. #39
    AR Newbie Registered Member
    Join Date
    Feb 2009
    Location
    NY
    Posts
    1

    Lightbulb

    Great work, I used them in the late 80's bi amped with ribbons on the top. I could only imagine how these sound!

  15. #40
    AR Newbie Registered Member
    Join Date
    Apr 2012
    Posts
    1
    First things first : thanks a lot Squeegy200, you've give me the guts to rip the socks and try to upgrade thoses SMG!! I'm french canadian so my english is not perfect, so be kind with my writing.

    My version are first one SMG : frequency cut of 2400hz, inductance unknown but can assume 0.22mH, capacitor 17uf.



    Here's my experience :
    - Cut the wings to fit in my living room... WAF was an issu with the big and really brown panels. They are now 15'' wide. Yep bass is affected, little less.. Changed socks for black

    - SInce I had 2 inductance layin around I had few test to perform. Really I wanted to experiment even though values seems way off. The value I have is 0.51 mH Litz (Solen) gauge 14, 0.51mh Litz (solen), and a 1.0mh with magnet core. About the desing I stayed with the same so it's first order serie.

    - 1.0mH with +- 60uf (solen Chateauroux 250v) freq cut 600hz = crappy result, bass was good but really the mid cannot be performed by the High wires...

    - 0.51mH Litz with 31.8uf (Solen chateauroux 250v 30+1.8) freq cut 1250hz. Lot better results : mid are there but still a little off and lifeless (like dynamic boxy speakers). I tried to lower the capacitor value so the curve would add to boost mids, little better but...



    I went back to Solen (yep, near my house ) and get the original value : 0.22mH Litz gauge 14 with 13.6uF (Chateauroux 250v 1.8+2.7+9.1), Freq cut 2400hz. The result was really really good, better than the original for sure but I wasn't happy about a thing : mid were too present now... geez... So I try to create a gap between curves. My best result was with 9.1uf! Quite a big gap!

    For the future : frame upgrade and buying finest quality cap!
    Last edited by Malenurse; 04-23-2012 at 08:42 PM.

  16. #41
    AR Newbie Registered Member
    Join Date
    Feb 2013
    Posts
    2
    Hello everybody.

    I also own the original 17μF smg and I am a bit confused about the route that I should follow. Probably, I will follow Malenurse's route, since I do not want to change the inductor. So, you are suggesting a 9.1μF, instead of the original 17μF. Have you made any further experiments? I will probably try both 17μF and 9.1 μF caps. Also do you believe a new inductor will have any sonic difference?

    Thank you

    Regards
    Papadakos Panagiotis

  17. #42
    AR Newbie Registered Member
    Join Date
    Feb 2013
    Posts
    2
    Well, since nobody replied, I got a pair of 10μF and 6.8 μF Obbligato capacitors and replaced the original 17μF TSI ones. I am really enjoying the result (although the new capacitors have not burnt in yet). Soundstage has grown and a bit of the previous muddy midrange has been removed. Also, I can hear easily more details and the previous tiny sweet spot of the speakers has grown. So it is a recommended and cheap upgrade for all SMG owners.

    Panagiotis Papadakos

    Quote Originally Posted by PanagiotisPapadakos View Post
    Hello everybody.

    I also own the original 17μF smg and I am a bit confused about the route that I should follow. Probably, I will follow Malenurse's route, since I do not want to change the inductor. So, you are suggesting a 9.1μF, instead of the original 17μF. Have you made any further experiments? I will probably try both 17μF and 9.1 μF caps. Also do you believe a new inductor will have any sonic difference?

    Thank you

    Regards
    Papadakos Panagiotis

Page 2 of 2 FirstFirst 1 2

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •