Modula MT efficiency? Tweak?

[Marvin]

Does anyone know the efficiency of the Modula MT with Seas TDFC tweeter? I know they are not very efficient, just curious if a number has ever been mentioned.


Also, how does one go about tweaking the high end? I sometimes wish was it a little brighter. I am afraid that tweaking any one component may affect the entire system.

Thanks,
Marvin

[ThomasW]

From the Modula thread.......

You may need or want to trim the value of R3 slightly to get the best balance; use 4 ohms for a little more overall highs and presence, 6-8 ohms to reduce high frequencies and presence range.

[Marvin]

From the Modual thread.......

Thanks, Thomas, you saved me a lot of searching time.

I have a couple of 3ohms on hand that I will try at least temporarily. Do you think there is any risk to the components in testing with the 3 ohm?

Marv

[ThomasW]

No just keep the playback levels sane while you test

[Marvin]

No just keep the playback levels sane while you test

I tested the 3 ohm today. It makes an obvious difference, but perhaps just a tad too much. I suspect the 4 ohm may suit my taste, but just in case, I ordered pairs of 4, 5, and 6 ohms from PE.

Hate place such a small order with PE, but my budget is limited lately. PE's reduced shipping rate for small items does help, though.

Thanks again for your reply. It was very helpful.

Marv

[cjd]

FWIW sensitivity is limited by the mid-woofer in this design. I'd guess 82dB@1w/1m...

[Marvin]

Looonnng time no, see, Chris. Will there ever be another DIY Chicago?

Thanks for the guesstimate, too. 82db sounds about right. Whatever I build next will be more efficient.

Marv

[cjd]

Looonnng time no, see, Chris. Will there ever be another DIY Chicago?

That sounds like a good idea - handling the logistics is the hard part (venue, scheduling) - I already said I'd emcee the next one and stand by that.

[Marvin]

That sounds like a good idea - handling the logistics is the hard part (venue, scheduling) - I already said I'd emcee the next one and stand by that.

C,

You may have an opportunity this year.......Doug P is bowing out of organizing DIY Iowa this year. Paul Carmody suggested Chicago but needs help. Maybe some of the group can work together on the event.

http://techtalk.parts-express.com/showthread.php?p=1727513

You're near Gurnee, correct? I believe Paul is near Rolling Meadows, I am far south side.
Marv