High Efficiency Speaker Asylum

RE: neophyte building help plea!

64.64.166.249

Joseph Crowe

A

In Reply to: RE: neophyte building help plea! posted by sober1 on July 03, 2014 at 08:01:23

Just a few tips, listen to the drivers individually and adjust the crossover frequency to see if something nasty shows up. Sometimes a driver is crossed too low or too high.

Also, make sure that your amp, preamp, and source are all high quality top notch stuff. I've seen so many times people trying to design a DIY speaker and they are powering it with crappy class-D amps and a DVD player as a source!

Follow Ups:

thanks - sober1 09:20:48 07/03/14 (5)
I'm starting over and doing one driver at a time. This time I'm going to start with a Dire Straits disc as they do well recorded studio albums and see where this tack takes me.
my sources are Class A, P-P, UL EL34 dual mono amp and Denon DVD 2800 MK II as transport with heavily modded SVDAC05 DAC.

"the only thing necessary for evil to succeed is for good men to do nothing"
- RE: thanks - Skip Pack 09:31:54 07/03/14 (4)
  I am in the same boat as yours -- My only test instrument is a DVM. I have been seriously developing my system now for a little over 10 years, and I strongly recommend developing a group of different songs that can help you judge the effectiveness of your system. You mentioned two where one sounded great but the other highlighted problems. I now have about 20 that I will go through just to get a sense of where I am. That test set is as effective as the diversity of factors each song highlights. You don't develop this test set quickly, but it's very worthwhile.
  
  As my system has becomes more refined, I also find I need a longer period of time (perhaps 2 months now) to get a handle on the next issue to address.
  
  I do enjoy the process and all the music in the meantime.
  
  Skip
  - RE: thanks - Bill Fitzmaurice 14:18:10 07/03/14 (1)
    > My only test instrument is a DVM
    
    You already have a computer, there are a number of freeware programs available (I use HolmImpulse), so all you need is a USB mic, like this one:
    http://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808
    
    There's really no excuse anymore for not being able to take precise measurements.
    - http://www.parts-express.com/dayton-audio-umm-6-usb-measurem (Open in New Window)
    - RE: thanks - hollowboy 20:41:51 07/16/14 (0)
      +1
      
      I just started using a Dayton calibrated mic with the audiotool app, from which I can then transfer data to my pc if I want to do detailed comparisons. Total cost $30, and works marvellously. It beats seven shades out of manually plotting test tones.
  - whew...... - sober1 12:53:55 07/03/14 (1)
    that's patience my man!
    I've only been at this particular project for a bit now and am starting to feel beat down. Two steps forward and one step back, all the while not being able to sit down, relax and enjoy some great sounding tunes as these will be my main system's speakers.......
    time to throw a leg over the CrossBones and blast out into the country to unwind and clear my head.
    
    "the only thing necessary for evil to succeed is for good men to do nothing"
    - RE: whew...... - hennfarm 18:55:03 07/04/14 (0)
      Easy does it. :-)

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