Can you recommend me a midbass?

[ramiro77]

Hi everybody!
I have a matched pair of Fountek neocd3 ribbon tweeters.
I want to use them in a 2 way config, with some 5" or 6" midbass.
Wich one would you recommend me and why?

I have a pair of Polk LSI7 midbass. They seems to be a custom design made by Peerless, but the truth is that i can´t get a sound that fits with the ribbon tweeter. They aren´t that good. I´ve tried to cross them at 3khz, witouth a good result. They have a terrible peak in the middle zone.
I didn´t tried to cut the midbass around 2.4-2.5khz and the tweeter at 3khz, should i try it or should i keep looking for another midbass?

I´m sorry if there is any mistake on my spelling, my english is not perfect.

[tinitus]

LB8 from EMSpeaker looks interesting

[StigErik]

Seas ER18RNX - very very good value and excellent sound.

[ramiro77]

Hey, i´m sorry but i forget that i´ve made the same question some months ago.
The truth is that i been trying to make a good crosspoint for my drivers without success.
I will keep trying to make a good crosspoint for them, and if it´s impossible, i will look for some new midbass.

[Shaun]

How are you approaching this design? Do you have any means of measuring the frequency response of the respective drivers?

[PeteMcK]

Peerless 830883, best value for money, check out the distortion profile on Zaph's website
(but the SEAS driver is very close too...)

[sreten]

Hi,

I've only seen that tweeter used in a 3 way or very small 2 ways.

see :

Fostex FE126E +
MiniStatements
HTGuide Forum - Lineup Series Build Thread (F4, D4, D44, R4, R44)

/ sreten.

[forr]

I am currently using this Scanspeak of the "Discovery" range :

Scan Speak Discovery 18W8434G00

I fully agree with the comments made on it at the Zaph Audio Blog.

[ramiro77]

Originally Posted by Shaun

How are you approaching this design? Do you have any means of measuring the frequency response of the respective drivers?

No, i haven´t got eqquipment to measure the drivers.
The only thing i know, is that the midbass is used in Polk LSI7/LSI9, and they used it with a crosspoint of 2.4khz with a 18db slope. But i´ve tried today this crosspoint with an active filter and they sounded equal than crossed at 3khz. And well, i have t/s parameters of tweeter, i bought them brand new in Europe.
Do you think that it would be worth to measure the speakers?

[cc00541]

I'll suggest that the Neo3CD be crossed no lower than 3.5K. Most 6" or even 5" drivers will not be able to reach that high off axis, so a design using them would likely exhibit compromised power response. Using those tweeters, I'm thinking a 3 way design with a 4" mid or perhaps a 2" dome mid might be a better choice.

The use of CAD crossover software (such as Jeff Bagby's PCD) will significantly improve your chances of a successful design.

Curt