Garage Stereo

Discussion in 'DIY' started by Mike B, Apr 19, 2009.

  1. Mike B

    Mike B Well-Known Member Donor Top Poster

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    This is the only amp I've ever had problems with and I've built 5 so far. All the Bottlehead stuff worked w/o blowing anything up and so did the Elekit as well as that K12G above.

    The ST120 puked the rectifier within an hour and some shit happened with the KT88 swap as soon as the thing started conducting. But this amp also has a lot more power and a lot more voltage. First time I ever saw a resistor blow w/o any outside signs at all. No smoke, no cracked case, not even discolored in any way. Looks fine from the outside, just measures 6.8 meg.

    I'll hang with this until the resistors arrive. Got them from some outfit in WA via ebay, so should be here soon.

    Also upgraded my head unit, might as well put in a good source eh? Ordered up an Alpine CDE-HD149BT, has HD radio too - :)
     
  2. chad

    chad Well-Known Member Top Poster

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    Just got word that a couple heavy boxes were delivered today. Hmm wonder what's in them.


    Sent from my iPhone using Tapatalk
     
  3. Mike B

    Mike B Well-Known Member Donor Top Poster

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    Cool. They hit the promised date!

    You've got enough power there to get to concert levels - :)
     
  4. Mike B

    Mike B Well-Known Member Donor Top Poster

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    Redid the garage sub. The Quattro went bye-bye and a Morel MW 1254 took it's place. Why such an obscure driver? It was the only one I found who's parameters matched the existing box.

    But a new baffle was needed as the cutout was much smaller, so I cut the old baffle off;

    36420937356_f75b80eb15_o.jpg

    And glued the new baffle on with a face board too;

    36420937296_ee25f841c8_o.jpg

    That carbon fiber is sexy. Used one of those auto sound "bar grilles" so I won't have rattles like the old perf metal one made, and here it is back home in the rafters;

    36420937366_cce63ccb51_o.jpg

    Onward and upward - :)
     
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  5. Carl V

    Carl V Bronze Member Donor Top Poster

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    looking good
    That is a nice driver
    A certain Tennessee High End Speaker Mfg.,
    egglestonWorks Such as his SAVOY,
    uses that line of drivers often in an isobaric
    configuration...Mids too!

    I see some Adire 10.1 HE in the rafters as well.
    Didn't swap out the tweeter & XO?
     
  6. Mike B

    Mike B Well-Known Member Donor Top Poster

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    It sounds good. A little less sensitive than the quattro, a little smoother. Now that the weather is getting cooler I'm going to be out there more. Gotta get rid of 1 motorcycle and put the pinball machine in there. That Alpine head unit sounds better than the Pioneer.
     
  7. Mike B

    Mike B Well-Known Member Donor Top Poster

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    Going back to bi-amp. Gonna put the 8 watt Elekit out there too for the tweeters. Ordered up 2 of these set to 2500 Hz.
     
  8. Carl V

    Carl V Bronze Member Donor Top Poster

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    I assume you are still running 10" beta Coaxials,
    where was the original XO point. I can't recall the
    Dan Wiggins design. I thought it was asymmetric
    with Higher order after the acoustic & Passive parts
    were summed. and you have a different Tweeter...
    Selenium? I ran mine with a Marchand XO or SNELL to off load
    the Bass at 80HZ but never active higher up like you are
    contemplating.
     
  9. Mike B

    Mike B Well-Known Member Donor Top Poster

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    Active sounded good and I have a "extra" amplifier here just taking up space. Still using a sub for <63Hz. Yes, still the Beta 10's, but I changed the tweeters again to PRV with polyimide diaphrams. Sound better than the titanium Selenium's I was using.

    So the Alpine sends the under 63 Hz stuff to the sub and now the smoother tweeters will be driven with a sweeter amplifier, the Elekit TU-879S, now discontinued.
     
  10. Mike B

    Mike B Well-Known Member Donor Top Poster

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    Back at it, going HiFi with new speaks. Bought a couple Tang Band W8-2314's, a new coaxial driver that I thought looked good. Here's the flowery stuff from the factory. This stuff is kinda funny, but I've been using Tang Band for a long time with good results and therefor am looking forward to; "perfectly produced nature tone"

    Ordered up genuine Baltic Birch ply off the internet, another first. Boxes are going to be vented 22 liters with F3 of 55Hz and mounted in rafters like current units. Going to experiment with both active and passive XO at 1.8 KHz.

    Also ordered up the new 3 terminal strips for the ST-120 and the new driver board cover as the new drivers are 4 ohm.

    Sawdust in the springtime!
     
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  11. Carl V

    Carl V Bronze Member Donor Top Poster

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    Curious to hear your take on these new drivers. P audio had nice coaxial/ coincident drivers. I assume they have XO already worked out. I still have my 10.1 they still sound ok with el-34 or even class D. I borrowed some first watt amps J2. Better.
     
  12. Mike B

    Mike B Well-Known Member Donor Top Poster

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    I was surfing up a storm. Looking at different pro drivers and kits from lots of places. Then happened on that odd looking Tang Band and thought "why not", they all have worked well for me in the past.
     
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  13. Denton

    Denton Bronze Member Donor Top Poster

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    Glad to hear Mike is enjoying his life. You may end up moving these beasts into the home itself. Good luck.
     

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