Search:

Type: Posts; User: fpitas; Keyword(s):

Page 1 of 13 1 2 3 4

Search: Search took 0.07 seconds.

  1. Replies
    91
    Views
    12,193

    Not exactly JBL, but close. They have their own...

    Not exactly JBL, but close. They have their own room in the Harman flagship store near Times Square. 4-way is unusual, true, but hardly dead, the Revel Salon2 is a famous example:...
  2. Replies
    34
    Views
    10,577

    8Hz fundamental, but then there are harmonics of...

    8Hz fundamental, but then there are harmonics of the pipe resonance.

    http://hyperphysics.phy-astr.gsu.edu/hbase/waves/opecol.html
  3. Replies
    34
    Views
    10,577

    It's still a transmission line, but it may not be...

    It's still a transmission line, but it may not be tuned where you want it ;)
  4. Replies
    34
    Views
    10,577

    The chimney may work as a transmission line. Good...

    The chimney may work as a transmission line. Good use of an unused fireplace, in any event.
  5. Replies
    5
    Views
    5,412

    If it were me, I'd study Zilch's Z19 crossover...

    If it were me, I'd study Zilch's Z19 crossover schematic for hints.

    http://www.audioheritage.org/vbulletin/showthread.php?18913-Altec-9844-8B&p=197971&viewfull=1#post197971
  6. Replies
    8
    Views
    2,815

    At the crossover frequency, the vertical...

    At the crossover frequency, the vertical dispersion will depend on the vertical separation of the horn and woofer. If they are much over one wavelength apart, the forward vertical lobe will be very...
  7. Replies
    8
    Views
    2,815

    I would think that, because of the huge vertical...

    I would think that, because of the huge vertical separation between the woofer and horn, a lower crossover is in order.
  8. Replies
    12
    Views
    4,077

    You may already realize this, but the impedance...

    You may already realize this, but the impedance of the driver will be greatly affected by the horn. That crossover was designed to work with an 811B horn.
  9. Typical woman...can't make up her mind which...

    Typical woman...can't make up her mind which frequency to use ;)
  10. Replies
    22
    Views
    12,775

    If you get in the mood to try a newer amp, the...

    If you get in the mood to try a newer amp, the First Watt F5 is supposed to be an excellent match with old Altec horn speakers.
  11. Replies
    22
    Views
    12,775

    You'll want to listen with your ears somewhere...

    You'll want to listen with your ears somewhere near on-axis to the horns. You could lift them, or simply tilt them back a bit.

    Sometimes the old caps in the crossover are bad and need replacing....
  12. Good comparison. Although, in the case of Bose...

    Good comparison. Although, in the case of Bose you'd hope adults would know better. Oh well.
  13. Replies
    18
    Views
    5,416

    Great! Enjoy...

    Great! Enjoy...
  14. Replies
    18
    Views
    5,416

    From that schematic it doesn't look like a simple...

    From that schematic it doesn't look like a simple 2nd order crossover, and the schematic doesn't indicate driver polarities. Oh well. Somebody here probably knows the answer. Of course, if you set up...
  15. Replies
    18
    Views
    5,416

    If that's a 2nd order crossover on the woofer and...

    If that's a 2nd order crossover on the woofer and horn, the two are sometimes wired out-of-phase; i.e., one driver (say, the woofer) is wired inverted from the normal polarity. That's done to account...
  16. Yeah, anyone that cares about sound quality, and...

    Yeah, anyone that cares about sound quality, and has bothered to look up Beats on the internet knows that they're subpar. Some people don't care, because they're cool. Oh well.
  17. Replies
    8
    Views
    2,331

    The J2 is a great amp, and one of its many...

    The J2 is a great amp, and one of its many virtues as a horn amp is no turn-on or turn-off thump. Not sure the 25W would be enough for driving direct radiators, unless one listens at very modest...
  18. Replies
    8
    Views
    2,331

    My 25W class-A amp (a First Watt J2) puts out...

    My 25W class-A amp (a First Watt J2) puts out 200W of heat continuously. Higher wattage class-A amps put out proportionately more heat, so be careful what you wish for. I agree that a high bias class...
  19. Replies
    12
    Views
    4,328

    My guess is the driver opening is purposely sized...

    My guess is the driver opening is purposely sized slightly smaller than the horn opening to avoid a "step" sticking up into the path, in case the driver opening is slightly misaligned with the horn...
  20. Replies
    10
    Views
    5,300

    511s in particular benefit from the high ceiling...

    511s in particular benefit from the high ceiling of a large room, because their vertical directivity broadens below 2.5kHz (the so-called pattern flip). My music room has a regular 8 foot ceiling,...
  21. Replies
    249
    Views
    71,950

    ivica raises a good point about spectral overlap....

    ivica raises a good point about spectral overlap. Some overlap is usually necessary to get good driver integration. I suppose if you sat hundreds of feet from the speakers overlap would not be...
  22. Replies
    249
    Views
    71,950

    It's not possible to cut straight off, but the...

    It's not possible to cut straight off, but the slope can be quite steep with DSP. Steep slopes have mathematical consequences, though. For a "conventional" filter topology, a steep slope will...
  23. Were it me, I'd parallel 33uF and 3.3uF caps to...

    Were it me, I'd parallel 33uF and 3.3uF caps to get 36.3uF. To directly answer your question, you should probably be within +/-5%, so for 36uF that's +/-1.8uF. Once again, were it me I'd try to get...
  24. His ucd amps are very respectable sound quality....

    His ucd amps are very respectable sound quality. A friend uses them, one of which is connected directly to a horn; no audible noise, no crossover distortion, excellent fidelity. His NCore amps are...
  25. Replies
    7
    Views
    4,980

    I did a little reading on the L7s; they're 4-way,...

    I did a little reading on the L7s; they're 4-way, meaning you'll be quad-amping each one if you go fully active. Just wanted you to be aware of that.
Results 1 to 25 of 323
Page 1 of 13 1 2 3 4