Help with Audiotechnology Flexunit 4h

[bernat]

Hello, I bought from Ebay a pair of Audiotechnology Flexunit , but when arrived at home they seem a special units, they are the 4" but no stickers about the model, the seller unknow more info, probably they come from a dismantelled loudspeakers ¿¿??.
I want to buid a small mini monitors for my 30w tube amp, Can some one recommend me a pair of tweeters and crossovers values? I cant find any project for 2 way system with this driver.

Thanks

[whgeiger]

Originally Posted by bernat

Hello, I bought from Ebay a pair of Audiotechnology Flexunit , but when arrived at home they seem a special units, they are the 4" but no stickers about the model, the seller unknow more info, probably they come from a dismantelled loudspeakers ¿¿??.
I want to buid a small mini monitors for my 30w tube amp, Can some one recommend me a pair of tweeters and crossovers values? I cant find any project for 2 way system with this driver.

Thanks

This may be your driver
Flexunits 4 H 52 06 13

With some dimensions you may verify the model number from here.
ORDERFORM - FLEX UNITS

In any case, you will need to measure the TSPs of your units.

Suspect Qts = 0.3 with Fs = 40 Hz. (approx.)

Recommend a reflex emclosure.

The crossover frequency will be primarly determined be the tweeter you use.

Here is a very good one to match the quality of the drivers you have.
http://www.orcadesign.com/images/Pdfs/RavenR1x.pdf

Regards,

WHG

[bernat]

Hi, thanks for reply
Yes, this is the driver, I cant measure the T/S I , I checked the impedance with my multimetre an says 5.6 Ohm in both drivers.
I will build the recommended reflex enclosure of the audiotechnology web, the tweeter you recommend looks very good but I'm thinking something less expensive like the Vifa DX25TG09-04 , now in promotion, DX25TG09-04 - Vifa 1 inch dome tweeter fabric diaphragm high sensitivity - Europe Audio
Maybe I will use The Scan Speak tweeters of my Avi NuNeutron (Now i dont remember the model) because I burned the voice coil of one mid testing one amplifier, 35 VDC at the output burned the VC in just one second (I'm still beating my head on the wall for stupid) The mids are out of production and there is no direct replacement (Vifa C13wg-08-08)
Kind Regards

[chlorofille]

Those beautiful 4'' midwoofers really deserve to be paired with a much better tweeter.
Some tweeter recommendations :

Reference class : Scanspeak R2904 ring radiator (crossover @ 3000Hz)
Scanspeak D3004 beryllium dome (crossover @ 1750Hz)
Focal Utopia Be beryllium (crossover @ 2500Hz)

Mid class : Peerless HDS / Scanspeak discovery D2608 (c/o 1500Hz)
Hiquphon tweeters (c/o 2500-3000Hz)
Visaton KE25 ceramic (c/o 2000Hz)

Budget class : Vifa XT25TG / DX25TG (c/o 3000Hz)
Wavecor soft dome (c/o 2000Hz)

What are the tweeters used in your Scanspeak speakers ?