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Maz4bz

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About Maz4bz

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    Australia
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    Maz

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  1. Super cool looking rig! Thanks for sharing. Would you please post up your measurements? Would love to see on and especially off axis measurements both horizontally and vertically please! Cheers.
  2. Dear all, I have been working on a build for my teenage niece for a while and wanted to share some progress. In the spirit of Econowave I have tried to reuse as much of the original cabinets as possible. I'm really quite happy how these have turned out: High Frequency Section I have used a locally available compression driver sourced from Alternative Imports Max AV AISD-44MMTD available for $58 AUD each delivered. They are surprisingly good build quality for the price I think. This compression driver has
  3. Looks good to me. I'd suggest using a target curve that's hot down low, with a gentle downward slope into the subs cut off. As I understand things ears are less sensitive the lower the frequency. I only use cuts. No boost. Measure your subs individually at the listening position and try moving them around to find the smoothest response, even small changes can make a big impact. Then all together at listening position and apply eq to this summed response. Paul Spence describes this process really well.... https://www.hifizine.com/2011/06/bass-int
  4. I use Omnimic and REW. You can download both for free. Omnimic is designed to be used with its companion Omnimic microphone. However this doesn't stop you from using the Omnimic software to load your curves measured using REW (for example) and generating the charts it produces. As far as I'm aware, REW doesn't have the capability to assemble a polar plot which is a minimum necessary requirement to understand the true success of any build you've completed. If you have a look at my Klipsch KG 5.5 update and 2.5 way conversion thread you can see there how I us
  5. To be honest all I'm doing here is following in the footsteps (parroting) the greats in this field. If you'd like to truly understand the significance of the polar plot then you'll find the attached white paper by Dr Geddes foundational. I think of a single, on-axis measurement (plot) a little like trying to drive your car with the windscreen painted out entirely in black. The only part you can see through being a small pin prick hole, directly ahead. Looking through a windscreen like that doesn't tell you much about what is happening around you. A polar p
  6. No! 😀 See attached.... 🍻 White Paper - Accurate In-Room Frequency Response to 10Hz - Jeff Bagby .pdf
  7. I've seen some debate about the concept of loading with Dr Geddes calling it into question over on DIY Audio. For me I measure the off axis response and look for where the directivity begins to expand rapidly and cross above that some to match the woofer directivity to get a smooth off axis summed response. Here's the Dayton/JBL PT/Econowave clone horn measured with the Alternative Imports 44mm VC CD. You can see the horn looses control just below 1khz (tho a normalised plot which I don't have to hand would help clarify if it were a little higher) but I am using a crossover
  8. Econowave! http://techtalk.parts-express.com/forum/tech-talk-forum/34467-flex-your-pcd-mettle
  9. Time to step up to the next level Muz and get DATS and a measurement mic from Loudspeaker Kit. Mostly everything becomes crystal clear then on about what you're doing. Keep up the good work! Cheers, Maz.
  10. Celef is absolutely worth saving. As mentioned already its not a good idea to replace drivers unless you can measure and design a crossover that actually suits your drivers. I would definitely not be changing anything about these. Assuming there is sound still coming from each driver, refoam them and they will be sounding as good as new. It is very easy and cheap to do. Foams are widely available on eBay for just a few dollars each. Actually it looks like the woofer on the right has been refoamed already? There are many how to videos on YouTube.
  11. If you're just starting out, I highly enjoy the Econowave series of speakers. These are all relatively high efficiency designs. There's the monster and active Econowave thread on Audiokarma, take a deep breath its a long read. 🧐 To get to the point a little quicker try the Parts Express Flex your PCD Mettle thread that sets out each Econowave version in a more succinct manner. The parts for an Econowave Standard are very affordable, mostly available locally at Loudspeaker Kit/Wagner Online (crossover parts, woofers and waveguide) or eBay (horn compression d
  12. Dear all, I managed to pick a few pairs of these nice speakers secondhand recently and wanted to post up my observations and some measurements. The original product brochure and a DATS impedance sweep are attached for reference and posterity purposes. The KX-1850 will be familiar to cinema goers as a fixture in many theatres around this country. Measurements were done in my home. DIY turntable for off-axis measurements graduated at 10 degree increments. All measurements made at about 600mm distance,
  13. I really, really love Troels builds. Living vicariously through his website is great fun. I really don't like how he only shows on axis measurements. As far as I can recall, there's not a polar, waterfall or impulse response etc to be seen. To me the polar is the minimum if you want to really see if a crossover is working well off axis, both horizontally and vertically. Dr Floyd Toole rates this as most important for a trained listener preference, see attached paper. Don't get me wrong, I'm super grateful for his openness and insights. I'd just really like
  14. G'day Greg, The seller is loudspkrman the listing includes a pair each of the 10" and 5" foams. Added measurements into first post just now too. Cheers 🍻
  15. Dear all, I have a soft spot for old Tandy Radio Shack speakers and have been enjoying a mint pair of T-120's recently that I thought I'd share. These were introduced by Radio Shack in 1984 and I think I may be the first person to hear this pair play! I think these are definitely worth saving as they have fine quality parts and the cabinet is very well made with real walnut veneer. Scan of the original user manual is attached as a PDF. I'll be modifying these as time permits, for now I'm
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