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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Active crossovers - opamps vs DSP
Active crossovers - opamps vs DSP
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Old 4th April 2019, 03:48 AM   #61
madisonears is offline madisonears  United States
diyAudio Member
Join Date: Sep 2007
Originally Posted by gabdx View Post
OPamp XO = your system is officially a two dimension world with a single cross over point and theoretical curves, nothing will fix timing, nothing will address peaks, bass boost will be required and you will hear a very 1d sound = un-involving at best.
This is an incorrect generalization. I use hybrid active/passive xovers with multiple xover freq's and curves. It is difficult to implement compensation for inadequate drivers, but there is definitely accurate tonality and a very real sense of depth and space.

Tom E
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Old 4th April 2019, 04:00 AM   #62
cacao ambiance is offline cacao ambiance  United Kingdom
diyAudio Member
Join Date: Oct 2015
jplesset yes but being able to tweak things on the go, is useful for portable setups that are in various, different environments. I built my own food tub computer using a a10 SBC and lcd module. lot of work, not that reliable... a small netbook is easier but a arm SBC would be more efficient than a x86 laptop. ease wins in the end, this time.

for a not-x86, more efficient generic computer thing for dsp, I would fancy a dedicated dsp product made using eoma68 computer cards . that way the $$$$$ soc, ram, hard to make computer bit is on standardized module that goes it a nice housing with the features that we want:
  • flexible battery power input
  • very low noise usb DAC and ADC
  • un/balanced ins/outs
  • touch screen
  • programmable level adjustment pots/nobs. ie vol, bass, mid, trebble,sub.
  • for more processing power, swap out the computer card :P
  • new more efficient computer card comes out? upgrade to that to save some watts
  • wifi remote access, monitor, control.
  • dsp and mixxer
  • small always on oled screen with spectrum graph display thing
EOMA68 Computing Devices | Crowd Supply
If a fancy dsp eoma68 housing existed, I would like to buy or pledge for it .

Last edited by cacao ambiance; 4th April 2019 at 04:05 AM.
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