postmortem of loudspeaker project

[mazurek]

BTW: Sorry mazurek, this has little to do with your project. What do you think to the ESP P71 LT circuit I linked to earlier?

I think I'll integrate aspects of it into my equalizer, maybe I'll share the final results, I'm going to make a stereo equalizer, with perhaps a gain, and a toggleable LT transform.

 

[reins]

I just wrote a huge write up of my speaker project. Dayton 12HF - Peerless 83075, Seas 27TDFC, active crossover.

http://www.mazprojects.com/audio/

Please comment, any newbies here should be able to learn something from it, veterans give me your opinion.

Hi Mazurek,

very nice documentation.

I´ve another question: What is the reason for using the AD version of the UCD if you already have a dozen OPA2134 in the signal path? I have the STD UCD and I thought about eliminating the opamp on the UCD and putting the gain stage in the preamp before the active crossover.

Stephan

 

[francis varkey]

Mazurek,

Nice work both the product and the writing.

BTW, just a bit confused about which plasma is going to be used for the new all-blow-away tweeters;
i) the constituent of blood
ii) a gas of positive ions & free electrons essentially having equal amount of +ve and -ve charges
iii) a green variety of quartz used in mosaic for decorative purposes.


AMEN!

 

[mazurek]

Stephan,

I don't see why you couldn't eliminate it as a gain stage - its only +/-12v so it doesn't have any more gain range than an OPA2134. Does it act as an input buffer though, and what is its gain?

I may end up getting more UCDs in the future, and if its easy to bypass the opamps altogether, I'll order STD versions.

I was going for quick and easy amplifier solution, and only researched the UCD minimally. I really only selected based upon hearing that the AD version sounds better, but that the amplifiers are power supply agnostic, I don't have experience listening to different opamps.

Lee