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THOMO

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THOMO last won the day on June 9 2013

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About THOMO

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    WA
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  1. I have done some old fashioned calculations. It seems - A 40 litre box will give a Qtc of 0.63 and an FC of 37.8Hz 66 litre box will give a Qtc of 0.525 and an Fc of 31.5 Hz A 75litre box gives a Qtc of 0.49 and an FC of 29Hz. Any advice on what is most likely to sound best? I am guessing 66 litres might be too big if a Qtc of 0.7 is considered optimal? But if you go too small to achieve that you start to lose low bass extension.
  2. There will be no EQ.I am trying to keep it simple and passive. The box has to be a reasonable size to fit the two way Kairos box on top without it looking odd I guess I can build it with a void to achieve that.Not really a fan of ported bass although the passive radiator might be OK.
  3. Front mounted woofers sound better to me.Especially considering the crossover is at about 250hz . They are also much less room fussy that way.
  4. Mine were despatched about 4 days after ordering.They do say that the inductors are wound to order and can take some time.I also opted to just buy the Kairos two way kit from them and put together the bass section and crossover myself and source the components locally. I am still waiting for the 10ohm 25 watt resistor from Element 14 as it was not in stock.They do have the 3 ohm 25 watt ones for the woofer section. I have come up with a much nicer looking design than those I have seen.Think dalek!Or you can build a Wilson style box as detailed by Troels Gravesen on his SBA 10 kit which is almost the same .I think that suits a painted cabinet better though. Yes I guess 66 litres is the default size although I am a little concerned that might be a bit underdamped[or rather not critically damped]. I might do some old fashioned calculations myself.
  5. Any advice for using this woofer? I am using it as the woofer section for a Meniscus Audio Kairos 3 way build.I have ordered the parts. I am aiming to cross it at 250Hz and hope to get it to work in sealed box but one that could be ported or used with the matching passive radiator. So an all-round sized enclosure and not too worried about it not going much below 35-40hz. SB states using it in a 33 litre sealed box but that seems small to me. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjhrK6gsePbAhXBFZQKHcHhCqIQFgg4MAE&url=http%3A%2F%2Fwww.sbacoustics.com%2Findex.php%2Fproducts%2Fwoofers%2Fnrx%2F10-sb29nrx75-6%2F&usg=AOvVaw0D3froRn8jvT9EXmt8kJaG
  6. Yes that makes sense.People are probably less likely to use a three way in a small room I suppose. The design Troels is talking about is the Ekta Mk 2 .
  7. What Troels Gravesen has to say- "What you get here is something rarely seen in commercial speakers, a 7+4+1. The vital 4" midrange driver bridging the gap between bass and tweeter. That's not to say the 6+1 or 7+1 cannot be made very well, it surely can, but it doesn't compare to the real thing of paying attention to the troublesome upper-mid/lower-treble. The transition from a 6-7" midbass to the 25-28 mm tweeter is a compromise. "
  8. THOMO

    Knock offs/clones on ebay

    Or pre-smoked? Sorry I couldn't resist it!
  9. THOMO

    UK 2018 trip

    South Devon is one of my favourite places.There are some beautiful coastal towns and Exeter is a great little city.See if you can buy some South Devon beef while you are there.Better than any Angus or Wagyu in my opinion. Good luck finding any parking and enjoy all those roundabouts.
  10. THOMO

    Great Buys on Gumtree

    I think the Golds are richer and more relaxed sounding than the Reds.I have owned HPD 15s too but they were too bassy for my room. They do seem to have a bass lift around 80Hz which can sound excessive in some rooms.I like the HPD 315 [12s] and think they are probably as good as any of them.
  11. Going to fill the freezer up with Nor West blowies more like it! Still selling their front teeth to use in dentures?That's where Barnaby Joyce got his apparently.
  12. THOMO

    Great Buys on Gumtree

    I bought a pair in laminex cabinets for $150 about 18 years ago. Unfortunately I sold them before the prices went really crazy. I really can't understand why they are worth so much more than the Golds though.I prefer the Golds although perhaps the Reds suit horn loading better.It would be interesting to hear the Reds in the GRF Rectangle cabinets.I built a pair of them for the Golds and that did not work well at all.They ended up getting thrown out.
  13. Around a third of the retail price [who pays that ?] is a good guide if it is more than couple of years old and is in good condition. If you want to sell it quickly make it about a quarter.
  14. It seems to me that the Yamaha NS5000s as set up in the Perth outlet are achieving their potential whereas those in other outlets probably aren't. I went directly from listening to a far more expensive system in a dedicated room which sounded very good[ Magicos etc about $100,000 worth] to that all Yamaha system [about a third of that cost] and the Yamaha one sounded even better . The dealer in Perth [West Coast Hi fi Malaga] has obviously gone to more trouble to set them up properly .That includes a bit of room treatment including some Yamaha acoustic panels directly behind the speakers. I have owned quite a few dome midrange speakers and they are room and positioning fussy .The NS5000s are clearly no exception but when set up properly sound absolutely wonderful.
  15. THOMO

    Bose 901 pricing

    They need the equaliser to sound as they should.Completely unlistenable without it. The foam surrounds rot out so that might explain the crackly.They can be repaired but you would have to do all 18 drivers and that would cost a lot more than they would be worth.
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