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MarcAL

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About MarcAL

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    Sydney
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    Australia

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  1. MarcAL

    DIY audio: what are you building?

    I found that when you do veneering that you must sand and stain or oil the veneer the same day. I did not do this on my first build and it started to bubble and lift off over night. This was due to the humidity up here in Sydney and is quite high over summer. To fix this the next day I then placed a sheet of A4 paper over those areas and applied heat from an iron. It remelted the adhesive underneath and all was fixed but will only work if you have put sufficient glue on to start with. That was more than 15 years ago and is still 100% now. Over time the veneer received a few bumps and gouges so I placed a scrap over it and cut it with a scalpel. I then removed the old piece underneath, cleaned it up then glued the new piece in place. Then sanded the whole side back lightly, stained and now it is undetectable. The good thing with veneer you can refurbish it in the future and it can look brand new providing you keep your scraps. So don't throw them out and keep them in a safe dry place as new veneer can be different. This is an image of my first build. These have been resanded and stained a year ago and are now 15 years old. Below is the first build on the left and second build on the right. Note the different shades of veneer over 6 years.
  2. Thanks for that but I still don't get how this happens as I had changed this listing a fair bit from the original one posted last December. So it should have appeared as a new listing with just the title as being 'Relisted'.
  3. MarcAL

    DIY audio: what are you building?

    I was only joking about the crossover networks. Ha, Ha, they can take days with design, sourcing parts, testing, building and a life time of listening hoping that they don't require any revisions in the future. But on a serious note are you going active or passive and what are your crossover points? The veneer however is what I was really admiring. Real quality job. I have taken on this task previously on other builds and I know how difficult and time consuming it can be. It looks like you have mastered it, you definitely have patients, brilliant!!
  4. MarcAL

    DIY audio: what are you building?

    These are magnificent! Excellent recessing job of the baffles for the drivers and speaker fixings look pro. I am wondering how you skinned the cabinets so neatly. Can't wait to see the bass cabinets completed. By the way do you require crossover networks? Keep up the good work.
  5. MarcAL

    DIY audio: what are you building?

    I have wound chokes by hand in the past however that is too expensive due to the amount of labour involved. The ones used here are air core Solen for the high pass filter and iron core ERSE for the low pass filter all 6.8mH trimmed down to 6.6mH. All of the inductors were measured with an inductance meter in free air away from any ferrous materials such as metal work benches etc. That is why the two iron cored inductors are placed well apart on the board.
  6. MarcAL

    DIY audio: what are you building?

    At last the crossover networks are completed! Features: Bi-amplified or bi-wireable input connections 12dB high pass filters with high frequency boost for 24 ohm drivers 12dB low pass filters configurable for 8 or 16 ohm drivers Zobel networks configurable for 8 or 16 ohm drivers Constructed on recycled 640 x 320mm Bakelite panels, 8mm thick Jumper configurations: Jumpers in: 2 x 6.6mH inductors in parallel to get 3.3mH with 0.14 ohm DC resistance for 8 ohm drivers and Zobel network to suit Jumpers out: 1 x 6.6mH inductor to get 6.6mH with 0.28 ohm DC resistance for 16 ohm drivers and Zobel network to suit Flexible for now and no need for major modifications in the future... well that is the plan. The main priority now is to sit back and listen.
  7. MarcAL

    What to do with old CDs?

    If one was to purchase this chair would only one person be allowed to sit on it? Heaven forbid if you ripped the fabric!
  8. Item: Altec Lansing MR II 564 Large Format Mantaray Horns Location: Sydney South Price: $225 for the pair Item Condition: Used, good original condition, see pictures Reason for selling: NLR Payment Method: Pickup - Cash, Paypal Only Extra Info: Altec Lansing MR II 564 Mantaray Constant Directivity Horns for large format 1.4" compression drivers. Nominal Dispersion Angle: 60 x 40 degrees. Useable Low Frequency Limit: 500Hz. Construction: Heavy duty, weather resistant polyester/fiberglass. Finish: Standard Altec grey with a few minor scratches, can be resprayed another colour for an additional cost. Suitable Drivers: Many 1.4" throat compression drivers or Altec Lansing Large Format Compression Driver models 288, 290, 291, 299 etc. Data Sheet: http://pdf.textfiles.com/manuals/STARINMANUALS/Bosch - EV/Archive/Altec/MRII 564.pdf Weight: 2.1kg each. Shipment: Will send interstate at purchasers expense, free delivery within Sydney. Pictures:
  9. Item: Altec Lansing 288-16K Large Format Horn Compression Drivers Location: Sydney South Price: $700 for the pair Item Condition: Very good, new 16 ohm diaphragms fitted, see pictures Reason for selling: NLR Payment Method: Pickup - Cash, Paypal Only Extra Info: These compression drivers have recently had new Titanium 16 ohm diaphragms fitted. The diaphragms have been nicely centered, tested and work extremely well with large format Mantaray and Multicell Horns. These compression drivers can also be used with many other large format, 500Hz, 1.4" throat horns on the market. The midrange and frequency response from these drivers is outstanding and have been used in countless legendary Voice Of The Theater two way speaker systems. Both drivers are complete with mounting hardware, protective rubber boots and gaskets. One of the cover labels is marked 288-8K but are now both 288-16K 16 ohm types since diaphragm replacement. This is achievable due to the magnet structures being both the same for each model and being a ceramic magnet type less likely to require regausing in the future. Refer to data sheet link below for more specifications. Data Sheet: http://greatplainsaudio.com/wp-content/uploads/2016/06/288-K-Series_hfdriver_spec_sheet.pdf Weight: 13.83kg each. Shipment: Will send interstate at purchasers expense, free delivery within Sydney. Pictures:
  10. MarcAL

    What to do with old CDs?

    Get a bigger bed or maybe a king size bunk.
  11. MarcAL

    What to do with old CDs?

    Easiest solution to "What to do with old CD's?" (now that we are at page 16 and are all lawyer-ed up) Don't broadcast that you have ripped any of them to anyone, ever!! Then keep the ones you really like in your audio library, it doesn't matter if they are old, lots of fine music is. If you run out of room there is always room under the bed or in the garden bed, be sure to place them in a moisture proof tin first and keep a map marked with an X. Then go out and buy New CD's that you like!!🤑
  12. MarcAL

    What to do with old CDs?

    Yes Dave, good point, this is true. However if the legal jargon is not supplied with a particular disk and there are no disclaimers or copy writes then what is the problem. If you rip the disk then that is your legal obligation/problem and yours only. Not to mention the quality of the rip. The purchaser of the recycled disk should not loose any sleep as they are the new owner. Are any of us end users REALLY seriously concerned about these laws anyway? Side one; listen to the disk as intended and do what you want when you are finished with it. By the way what was the initial post topic... anyone? Side two; which is meant to be a label, legal jargon if included, with no sound, the debate continues....
  13. MarcAL

    Removing marks of equipment

    Make sure that you dry the four high tensile steel Allen key heads on the panel including the inside of each head from any moisture as these will surely corrode.
  14. MarcAL

    What to do with old CDs?

    Legally once you have done this you would need proof of purchase so if you don't have receipts you need to keep the originals to be safe from the Feds.😎
  15. MarcAL

    LED's on audio gear!

    To answer your question Felix I like in the order Red, Amber, Green, Yellow then White. Now... Infrared? 😆 perhaps but not Blue.
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