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  1. Don't use too much you don't want a hard spot or...

    Don't use too much you don't want a hard spot or a lot of mass added to the surround.

    Rob:)
  2. The 4350/55 used a bracket that attached to the...

    The 4350/55 used a bracket that attached to the inside cabinet brace. The 2440 is at least twice as heavy as the 2450. It wouldn't hurt to support it especially if they are ever going to be moved say...
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    2216nd Price Drop

    Was just over on Speaker Exchanges site and they were $399 as opposed to $599?? That's a 1/3 drop in price! Anybody hear any scuttlebutt??

    I have seen this happen a few times and shortly there...
  4. Hello I would look the here: ...

    Hello

    I would look the here:

    http://www.audioheritage.org/vbulletin/showthread.php?33565-2216Nd

    Based on that and my own measurements I think you would be pushing things a bit. I crossed...
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    They look great! Now the really fun part! ...

    They look great! Now the really fun part!

    Rob:)
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    "Most likely I will be visiting the tuning rabbit...

    "Most likely I will be visiting the tuning rabbit hole eventually. Could you suggest some good microphones and external sound cards? I happen to be Mac based but I have a pc if that’s really the best...
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    Cool that you have it and the keys!!! I once lost...

    Cool that you have it and the keys!!! I once lost a complete set when my kids were little. Never thought to crack a speaker open!

    Rob:)
  8. Hello There will be a bit of a difference but...

    Hello

    There will be a bit of a difference but depending on where and how much there is it may not matter.

    The CD in that system is run through a narrow range bandpass filter. That works in...
  9. Thread: WTF

    by Robh3606
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    Why are you surprised?? Rob :) ...

    Why are you surprised??

    Rob :)



    https://www.ebay.com/itm/363467883154?hash=item54a05fc292:g:iA4AAOSwIWNg7jY6
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    Always look in the Library 70's Enclosure Plans ...

    Always look in the Library 70's Enclosure Plans

    http://www.lansingheritage.org/html/altec/plans/altec-plans.htm

    Rob:)
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    Well that is certainly good news as the 2431's...

    Well that is certainly good news as the 2431's diaphragms are readily available. Looking back at the pictures I don't see aguaplas on the dead diaphragm. It should look flat dark grey almost flat...
  12. If they are working fine I wouldn't bother. What...

    If they are working fine I wouldn't bother. What exactly does bench test mean??

    Rob :)
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    Are there any JBL Synthesis dealers in...

    Are there any JBL Synthesis dealers in Australia?? The SAMHF is still current on the US site. The 435AL is used in that system. Maybe they could get you a spare driver?

    Rob :)

    ...
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    Are those tinsel leads touching the ring? That...

    Are those tinsel leads touching the ring? That could short them they don't look like they are coated there.

    Rob:)
  15. Those prices are way high! Look at the 1976 Pro...

    Those prices are way high! Look at the 1976 Pro price list. 2440 is a 375. Same for the Le-85/2420. Looks like someone is inflating the prices. I have seen so many sham auctions on EBay it wouldn't...
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    Hello Earl Your welcome! I am thinking that...

    Hello Earl

    Your welcome! I am thinking that they were damaged in shipping and the pole pieces shifted pinning the voice coil. That would account for the muted response. Just a guess on my part...
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    Hello Earl Hmm that was a while ago. This may...

    Hello Earl

    Hmm that was a while ago. This may not be exact from what I can remember I used a 5 minute epoxy and removed it before using the supper glue. The pole piece shifted before it was fully...
  18. No. It's not in any of the catalogs on the site....

    No. It's not in any of the catalogs on the site. Weights off too heavy. Neo back in the 70's ??

    Rob:)
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    If you don't have access to a good simulation...

    If you don't have access to a good simulation program like LEAP just stay close to the DCR values that JBL published for the crossover. You could go to all air wound coils but the cost and size can...
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    Hello Oldbrowndog There is a measureable...

    Hello Oldbrowndog

    There is a measureable difference between the two drivers and when I built my Array 1400 DIY I used the beryllium drivers and had to make a value change in one of the inductors...
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    I understand your preference but when the drivers...

    I understand your preference but when the drivers designer says it should be there that's information the OP should have and he can make his own decisions.

    Rob:)
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    That's not correct. Take a look at Doug Buttons...

    That's not correct. Take a look at Doug Buttons comments in Ian's attachment. Middle paragraph.


    Rob :)
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    Hello I thought the LSR6312 did the bass...

    Hello

    I thought the LSR6312 did the bass management. They have LCR inputs and outputs so I thought the LCR outputs were high passed and the bass was summed. You can also daisy chain the subs as...
  24. It will be very similar you won't know for sure...

    It will be very similar you won't know for sure until you measure. You are only changing the arrangement of the drivers but the spacing will remain approximately the same. I wouldn't get hung up on...
  25. Yes and in the Array 1400 as well just look at...

    Yes and in the Array 1400 as well just look at the on axis measurements. You have baffle separation a high crossover frequency and the acoustic centers are offset, it's kind of a worse case. What...
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