*Please Read Disclaimer at end before posting*
Iâ€™m pretty excited with what landed on my desk today; 2 x 1 inch tweeters and 2 x 5" woofers.
These are OEM from discontinued products, most likely manufactured by Tymphany/Vifa, in turn specifications such as TS and FR are unavailable; which partly explains my purchase. I have assembled speaker kits before but thought it would be fun to measure some drivers myself in order to produce a 2-way bookshelf system from scratch.
Driver data as provided by seller:
Tweeter: 25mm Soft Dome, 40 Watts â€“ 120 Watts, 8 Ohm Nominal, 25.5 Hz â€“ 20 KHz, Diameter: 94 mm, Cutout Size: 70mm
Data 50 Watts RMS 100W peak, 4 Ohm, 88 dB, 54Hz, 1" Voice Coil, Poly doped, treated paper cone. Double magnet. Dimensions: 148mm frame, Cut out size: 120mm
Having trawled Google images I'm pretty confident these came paired in a bookshelf with the following specs:
Crossover Point 1.9kHz, Nominally 6 ohms, Bass reflex rear vented, Dimensions 295mm high x 175mm wide x 240mm deep, Volume 7 litres internal.
With that said my plan is to approach from a clean slate and not replicate existing designs. I have never measured TS or FR or designed a crossover so Iâ€™m hoping you knowledgeable folk can jump in and assist.
I am unable to find a good reference explaining how to measure drivers and implement in a system, however my understanding of the process is:
(1) Measure TS parameters of woofer,
However this article raises issues with TS data and enclosure design.
(2) Design and build enclosure from TS parameters
(3) Perform frequency response testing of drivers mounted in enclosure (I think I need to obtain the impedance response of the drivers as well)
(4) Create crossover from data
(If you have a relevant link please post it â€“ links above are indicative of how I will approach that aspect)
Two software suites come to mind when looking into the above:
http://www.roomeqwizard.com/ ... REW manual: http://www.roomeqwizard.com/help/help_en-GB/html/index.html
There are others such as SpeakerWorkshop, SoundEasy etc however they are not free and do not offer lite versions. With that said, I believe most suites use the same algorithms for calculating TS, and REW is apparently quite powerful for FR analysis(?).
My aim is to update the first few posts with milestones and references to the relevant posts while the entire thread will show chronological order and discussion.
Feel free to jump in and assist :-)
#Disclaimer - I will not post the OEM brand details and would ask respondents follow suit. They are a great company that I have purchased from before and I think its fantastic end of line stock is released onto the market and not made landfill; however they may not like their brand name popping up in a DIY thread from Google searches. I would also encourage those that wish to build a speaker kit perhaps look at Loud Speaker Kit (LSK). Their bang for buck drivers are most likely a better option and their kits are well designed#