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dgage last won the day on November 10

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About dgage

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  1. Bulding the Room2 listening room

    I often tell people with most speakers, the speaker will get unhappy before you but with mine, you’ll get unhappy before the speakers. My speakers are JTR 212s with compression drivers/horns. I couldn’t go back to regular (non-horn) speakers now. But the CDs have to be smooth and detailed, which so far has meant higher quality compression drivers.
  2. Bulding the Room2 listening room

    You should have seen the reaction to my room at T.H.E. Show Newport in LA with my 60” TV sitting on top of a 24” subwoofer flanked by a pair of JTR 212 HT-LPs sitting on top of a pair of JBL 15” midbasses. They were going to leave because of the TV but made the disgusted faces when seeing the 24” sub. Because physics fails when a 70 lb magnet-motor moves a 24” 1.3 lb cone. Lol! Interesting story about the doc. I’ve had plenty of similar conversations and it usually doesn’t go very far if they’re “audiophiles”. And frankly I’m not that interested in fighting those ingrained beliefs. Life is too short for those with closed minds...about any subject.
  3. New CEA 2010 in room Measurements.

    That link doesn’t work for me. As as far as I know, he is still following this methodology, which is traditional ground plane testing in the middle of a field. This is also how most subwoofers are tested. http://www.audioholics.com/loudspeaker-design/powered-subwoofer-testing-outline-and-procedures-overview The only real alternative is testing in an anechoic chamber but those are hard to come by and would be $100,000+ to build right. Testing in the room would not be testing the sub, it would be testing the sub AND the room. Not very valuable since we likely don’t have the same room available as he tested in.
  4. Moving massive / unwieldy subs?

    MemX - that cart is not designed for stairs and I expect would quickly break. Like LilMike mentioned, you want an appliance dolly like you’d use to move a refrigerator or washer. And then strap horizontally around the dolly just below the handles. And then strap vertically around the sub and appliance dolly support plate so the person below the dolly can help lift the sub going up and down.
  5. Moving massive / unwieldy subs?

    I have some experience moving large subs unfortunately. Get yourself a decent hand truck (not the stair climbing gimmicks) and a ratchet strap (endless or continuous would be best so you don’t have to deal with the hooks). Just strap the thing down vertically and then you can pull up with the truck handles and the other person can lift the sub or the bottom of the hand truck to go upstairs. Or pay someone to move them for you, which would be my vote. Lol! EDIT: would probably recommend a second ratchet strap vertically to strap the sub to the bottom support tray, which would then allow the lower person to lift the sub more easily. And rubber coated gloves grip smooth veneered surfaces well.
  6. By the way, I delivered a pair of my 18” subs the other day and when he was giving me a demo on his suspended floor I told him the Crowson’s gave a nice effect. The next day, he told me the Crowson’s had been turned off when he gave the demo. If on a suspended floor, I would go with some sealed subs, which will also give you plenty of tactility. If you’re on concrete, I’ve done some testing regarding different building techniques for putting wood over concrete to get more tactility. http://www.avsforum.com/forum/19-dedicated-theater-design-construction/2443450-comparison-wood-platforms-concrete-tactile-bass.html
  7. Crowsons have some nice and natural feeling effects. Buttkicker, at least the ones I’ve heard, are not as nuanced and so are quite noticeable in their effects. For me personally it would be Crowsons or nothing based on my limited listening of a few Buttkicker systems vs the single Crowson system I heard.
  8. Maximum horn compression ratio?

    Thanks guys. Appreciate the in depth response and sorry for the off topic. Interesting to read and learn but I’m not as interested in being able to design drivers further than I know what I want something to do. Cool stuff as always on Data-Bass. The guys on this forum are amazing.
  9. Maximum horn compression ratio?

    Thanks for the lesson guys. The knowledge level here is amazing. I know that's pretty basic for you guys but I'm just fine with having other people design drivers for me and with knowledgeable people like all of you, can you blame me.
  10. Maximum horn compression ratio?

    How are we comparing motor force? The Bl for the HST-18 is higher than the Ipal. But you also mentioned efficiency, yep, different ball park and design goals. Sorry to take this off topic as I was just wondering. Definitely not trying to say one driver is better than another.
  11. Maximum horn compression ratio?

    I understand the HST-18 might not work in your situation but I’m a little surprised by the comment of not enough motor force. Are you referring to the mkII driver or the original as the mkII uses the same magnet-motor as the HS-24 mkII. And the HST-18 mkII is an 80 lb driver, mostly magnet. I’m not trying to be defensive or suggest that the HST-18 is the best driver ever but I want to know what drivers you’re looking at if you consider the HST-18 MK II to have low motor force.
  12. Maximum horn compression ratio?

    In my 18” subs using the HST-18, I allow almost 4” above the mounting surface to allow for excursion before the grill.
  13. Need help with "bass" project

    Haha. Thanks. I'm going with something similar. I ordered a Raspberry Pi and will use that with a small USB audio interface to output to an amp. I made some high-frequency files and have a remote control I will use for control. I ordered some inexpensive piezo horns from Parts-Express (https://b2b.parts-express.com/grs-pz1165-4-3-8-piezo-horn-tweeter-similar-to-ksn1165a--292-446). Now I just need time to deploy it. I also did get a chance to talk to the mom (didn't care which parent) and had a frank but cordial conversation. After she had recently said to my wife that the dogs are good dogs, I had to point out that I don't blame the dogs one bit, they're doing exactly what their owners allow them to do. Since that conversation, things are much better though I still need to get the contraption out there to help persuade them to stop barking though at least they aren't left outside as much. And again, this is meant to address specific behavior, I don't want to harm the dogs in any way as I'm a huge dog lover. My dog is 17 years old and when he passes, I'll probably be crying more than my kids will be.
  14. Funny that many in this forum are among the very few in the world that could actually faithfully reproduce such a recording. Really wish we could get a quality recording of one of the launches. Would be phenomenal.
  15. Real life sounds - instantaneous loudness

    Did you read where we found out Lone Survivor's minute-plus long helicopter scene (ch 4-6?) had a 6.7 Hz pseudo sine wave about 10 dB hotter than the rest of the sound track? Almost blew up 2 of my test Mariana 24s that didn't have limiters. Apparently sound engineers don't know what a spectrum analyzer is either.