Search:

Type: Posts; User: Ian Mackenzie; Keyword(s):

Page 1 of 20 1 2 3 4

Search: Search took 0.73 seconds.

  1. Replies
    8
    Views
    590

    They are. However the newer 2123 requires a...

    They are.

    However the newer 2123 requires a modification to mid filter.
    Search for Jbl 4344mk11 schematic.
  2. Replies
    8
    Views
    590

    https://www.parts-express.com/pedocs/specs/294-412...

    https://www.parts-express.com/pedocs/specs/294-412-jbl-2426j-specifications.pdf

    Read the above link

    The 2425J is technically identical except it does not have removable snout.

    The 275nd was...
  3. No problem.

    No problem.
  4. Your funny. I bought the DBX to fill a gap...

    Your funny.

    I bought the DBX to fill a gap after sending my Pass Labs diy active crossover to an LHS forum member who still has it. That was a long time ago. The difference was night and day in my...
  5. https://dbxpro.com/en/products/234 I don't...

    https://dbxpro.com/en/products/234

    I don't think the above crossover will provide enough flexibility for the starting point of a diy loudspeaker such as this.

    My recommendation is to do the...
  6. Replies
    8
    Views
    590

    As an alternative there is a diy design here....

    As an alternative there is a diy design here.
    The concept is similar by a reputable designer.
    It uses an 18 inch woofer. Still overall a costly project but the drivers are accessible.
    ...
  7. Mr Widget makes some excellent points. The...

    Mr Widget makes some excellent points.


    The Accuphase is a fine unit but the plug in boards are now difficult and expensive to obtain.

    I would be patient and continue your investigations...
  8. Replies
    8
    Views
    4,058

    There are a few phono stages with AD conversion....

    There are a few phono stages with AD conversion. So the data could be stored and then played back through a digital signal path. These are generally budget quality products.
  9. You will find the dispersion (power response) of...

    You will find the dispersion (power response) of the 604 horn a contributing factor to the tonal balance.
    I would leave it level unless you understand the impact of the power response.

    About the...
  10. Replies
    29
    Views
    1,806

    Simply wear a face mask during installation. ...

    Simply wear a face mask during installation.

    Itís only a problem when you start cutting or tearing apart the fibre glass.
  11. You can use other materials but they wonít have...

    You can use other materials but they wonít have the same sound absorption coefficient as fibre glass. Fibreglass is a known quantity and itís properties are predictable. Other materials may also...
  12. With your theory on the floor bounce look at the...

    With your theory on the floor bounce look at the direct listening distance and then the distance if a sound wave bounces off the floor midway along the direct listening distance. That second longer...
  13. I had a look at Robs simulation. Behind the...

    I had a look at Robs simulation.

    Behind the scenes your 2351J has an impedance in the enclosure.
    I donít know if enclosure is seal, open back or vented.
    But that impedance and the 6 dB bandpass...
  14. When you say the bottom end what frequency is...

    When you say the bottom end what frequency is that?
    What is the crossover frequency and slope of the 18 inch and the 10 inch driver?
    I pic would help as l donít recall the baffle.

    An educated...
  15. Standard practice is to start with 1 inch fibre...

    Standard practice is to start with 1 inch fibre glass insulation on all surfaces except the front baffle.
    The fibreglass actually absorbs sound.

    Do not use other materials such as carpet under...
  16. All the background on the 2231A-2235H and the...

    All the background on the 2231A-2235H and the 4350 is in Donís History of JBL article.

    None of this information is hard to find. You just have to want to find it.

    If you look in the Jbl 5235...
  17. Replies
    9
    Views
    690

    1. Correct. 2. One First Watt B4 (stereo 2 way)...

    1. Correct.
    2. One First Watt B4 (stereo 2 way)

    The active crossover functions to split the line level audio signal after your preamplifier between two stereo power amps into seperate frequency...
  18. Replies
    9
    Views
    690

    Hi there and welcome to the forum. I am also a...

    Hi there and welcome to the forum.

    I am also a local in Melbourne and happy to offer guidance on your new acquisition.

    You have quite a shopping list and that is the right approach.

    To...
  19. If you like it leave it as is.

    If you like it leave it as is.
  20. Replies
    28
    Views
    2,718

    https://manuals.harman.com/JBL/HOM/Technical%20She...

    https://manuals.harman.com/JBL/HOM/Technical%20Sheet/L15%20ts.pdf

    https://reconingspeakers.com/product/jbl-033-034-aftermarket-diaphragm/

    It depends on what your aim is?
    You could replace the...
  21. Replies
    29
    Views
    1,806

    Here are some reference threads to get your head...

    Here are some reference threads to get your head around the options.
    Looking at the crossover network as a starting point check what horn you have? If itís the short horn then your looking at a...
  22. Replies
    26
    Views
    2,001

    For some who own a collection of Jbl drivers past...

    For some who own a collection of Jbl drivers past and present such as the 2216nd then they might play around with the idea just for grins. With a dsp based active crossover it might be possible to...
  23. Replies
    26
    Views
    2,001

    Nice pic Todd, Back to the first post...

    Nice pic Todd,

    Back to the first post questions .

    Dual woofers will demonstrate more authority than the same single woofer
    In the case of the 4350 the woofers bandwidth is also deliberately...
  24. Indoor measurements for loudspeaker design are...

    Indoor measurements for loudspeaker design are very limited. You canít do meaningful power response measurements.

    So donít expect much.

    If you have a car port try a ground plane measurement...
  25. Those results are consistent with the drivers of...

    Those results are consistent with the drivers of that era.

    The 2216nd-1 is a very low distortion driver. If you do a ground plane measurement on your drive way it might be more revealing of the...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4