beaver

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About beaver

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    Iskusan član
  • Birthday 01/19/1978

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  • Gender
    Male
  • Location
    Beograd
  • Interests
    Audio amp, preamp and loudspeakers and turntable

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  1. AKo moze mala pomoc oko izbora drajvera za bas FUGA MK 3 hvala.
  2. Tako da je fuga mk 3 fakticki This design is a single fold transmission line.
  3. A Transmission Line Subwoofer Designed & Built by Yves Mattei This design is a single fold transmission line using a 330mm (12") Audax driver (HD 33 S 66). The port loads out the back. Very little stuffing is used. It as a SubWoofer in a Home Theater System with an active 4th order low pass at 70 Hz. Since the cross-over is low, upper resonnances ( > 150 Hz ) are not a big problem. This line is not optimized for higher crossover frequencies. Results: From 50 Hz to 100 Hz driver and terminus are in phase (+/-10°) The - 3dB point is near 45 Hz At the Fr of the line (40 Hz) driver and terminus are 90° out of phase A Transmission Line Subwoofer Designed & Built by Yves Mattei This design is a single fold transmission line using a 330mm (12") Audax driver (HD 33 S 66). The port loads out the back. Very little stuffing is used. It as a SubWoofer in a Home Theater System with an active 4th order low pass at 70 Hz. Since the cross-over is low, upper resonnances ( > 150 Hz ) are not a big problem. This line is not optimized for higher crossover frequencies. Results: From 50 Hz to 100 Hz driver and terminus are in phase (+/-10°) The - 3dB point is near 45 Hz At the Fr of the line (40 Hz) driver and terminus are 90° out of phase Below 40 Hz they are out of phase The stuffing could have be better optimised, reducing the effect of the null at 140 Hz. If I were to do it again I'd make the terminus a bit larger. (or use the line for a 10"/ed) Since originally putting this project together more stuffing has been added making this a true TL. The preliminary results are that the stuffing improves the performance of the speaker. (details as they become available/ed) Line Configuration Audax PR 330 M0* Physical length 1.6 m Sd 538 cm^2 Physical fs at 1/4 wl 54 Hz Vas 264 liters Acoustic 1/4 wl (measured) 2.13 m/40 Hz Cms 6.5 e-4 N/m Measured c' 0.75c Cas 1.9 e-6m^5/N (speed of sound in the line) Mms 52 g Begining cross section 838 cm^2 Fs 27 Hz Terminus section 262 cm^2 Bl 13.6 N/A Taper 1.6 : 0.5 Sd Re 5.8 Ohms First odd harmonic 140 Hz Qms 6.7 (null of driver, max of terminus) Qes 0.28 Max of terminus 90 Hz Qts 0.27 (level of the terminus is 3 dB below the driver ) Pmax 150 Watts Stuffing 50 mm Rockwool Xmax +/-4 mm Plans * Audax HD 33 S 66 replaced by PR 330 M0 Notes: Testing: Monacor MCE2000 electret capsule mounted in an amplifer g=100 that I built. I used a sinewave generator and a oscilloscope. The data on the phase was made using comparative measures with the dual trace scope [ <-- Back to Projects | Yves TL | Plans | Home Theater ] Below 40 Hz they are out of phase The stuffing could have be better optimised, reducing the effect of the null at 140 Hz. If I were to do it again I'd make the terminus a bit larger. (or use the line for a 10"/ed) Since originally putting this project together more stuffing has been added making this a true TL. The preliminary results are that the stuffing improves the performance of the speaker. (details as they become available/ed) Line Configuration Audax PR 330 M0* Physical length 1.6 m Sd 538 cm^2 Physical fs at 1/4 wl 54 Hz Vas 264 liters Acoustic 1/4 wl (measured) 2.13 m/40 Hz Cms 6.5 e-4 N/m Measured c' 0.75c Cas 1.9 e-6m^5/N (speed of sound in the line) Mms 52 g Begining cross section 838 cm^2 Fs 27 Hz Terminus section 262 cm^2 Bl 13.6 N/A Taper 1.6 : 0.5 Sd Re 5.8 Ohms First odd harmonic 140 Hz Qms 6.7 (null of driver, max of terminus) Qes 0.28 Max of terminus 90 Hz Qts 0.27 (level of the terminus is 3 dB below the driver ) Pmax 150 Watts Stuffing 50 mm Rockwool Xmax +/-4 mm Plans * Audax HD 33 S 66 replaced by PR 330 M0 Notes: Testing: Monacor MCE2000 electret capsule mounted in an amplifer g=100 that I built. I used a sinewave generator and a oscilloscope. The data on the phase was made using comparative measures with the dual trace scope [ <-- Back to Projects | Yves TL | Plans | Home Theater ]
  4. HI FI AUDIO SAJAM HOTEL HOLIDAY INN 08.11.2014 NEKAD I SAD... UPOREDITE SA 2015 GODINOM
  5. SLIKE SAJMA HOLIDEJ IN...2015
  6. i za kraj zbirni grafikon SAL BAS + TWEETER EMINENCE HORN SMITH.....1m/1w
  7. Smith horna sa visokotoncem EMINENCE ASD 1001 kompresioni drajver.....grafikon.... ima skretnicu na 18db na 2200Hz rezne frekvencije.
  8. Noviteti iz zone eksperimenta za modifikaciju GRF TANNOY-A "BASS SAL ONLY" u kutiji grf-a izmeren je....bez skretnice...bass je sal sbx 2030/bk 08806_03_01.pdf 08806_03_02.pdf
  9. InaÄe sam iz Beograda i obožavam horne tannoy ajoj
  10. Ispilo sam se na ovom forumu 29.11. 2014 ali u svakom slucaju forum je fantazija tema i tema ima, nemogu sve ni proÄitati Å¡ta sve ima... Želim sve najbolje ljudima koji se bave audio tehnikom u svakom smislu
  11. Srednjetonac je vezan u kontra - fazu u odnosu na bas ... grafikon spl-a. Nema promene na bolje Å¡to se tiÄe krive spl-a u donjim frekvencijskim granicama (sliÄan kao predhodni grafikonu). Inace po grafikonu se vidi da mora joÅ¡ da se utiÅ¡a srednjetonac zbog nivelacije glasnoće sa basom (ide L-PAD kolo na skretnicu tj. dva otpornika).
  12. Bas je vezan u kontra - fazu u odnosu na srednjetonac ... grafikon spl-a
  13. Bas je vezan u fazu sa srednjetoncem... grafikon spl-a Vidi se blagi porast basa izmedju frekvencijskih granica 40Hz - 70Hz (u odnosu na predhodne grafikone spl-a (podrazumevajući da su drajveri u kutiji))