I have measured over the counter of an electronic shop this 10 inch speaker labelled TAME (most probably china made) and have obtained the TS params below. What project can come out using this driver?
Parameter Value Dim
Fs 38.65 Hz
Re 6.1 ohms[dc]
Qt 1.17 -
Qes 1.54 -
Qms 4.84 -
Mms 33.31 grams
Rms 1.640749 kg/s
Cms 0.000509 m/N
Vas 92.47 liters
Sd 359.68 cm^2
Bl 5.665913
Tm ETA 0.33 %
Lp(2.83V/1m) 88.52 dB
Le 252.52 uH
L2 540.42 uH
R2 12.48 ohms
L3 0 uH
R3 0 ohms
Parameter Value Dim
Fs 38.65 Hz
Re 6.1 ohms[dc]
Qt 1.17 -
Qes 1.54 -
Qms 4.84 -
Mms 33.31 grams
Rms 1.640749 kg/s
Cms 0.000509 m/N
Vas 92.47 liters
Sd 359.68 cm^2
Bl 5.665913
Tm ETA 0.33 %
Lp(2.83V/1m) 88.52 dB
Le 252.52 uH
L2 540.42 uH
R2 12.48 ohms
L3 0 uH
R3 0 ohms
A paper weight? An ash tray? A door stop?
No, seriously, if you manage to measure the TSP, you must have a clue. I'd say: open baffle, four per side.
No, seriously, if you manage to measure the TSP, you must have a clue. I'd say: open baffle, four per side.
I had no clue before your suggestion. Input in Winsd gave me a closed box of 1707L with 1200 ripple ( I do not know what it is about) , unibox gave a box of -166L and J Bagby's woofer and circuit designer resulted in a sealed box of -143L. Thus the reason of my thread.
Ah, but WinISD will normally only give you 'normal' tuning options. It may/should be obvious that the Qms and Qes of this unit aren't low enough for closed or reflex enclosures. If you insisted on such use, a dedicated active highpass crossover or a Linkwitz Transform could help realize a reasonably flat response.
How did you acquire the data BTW? Had the speaker been played in before the measurement?
How did you acquire the data BTW? Had the speaker been played in before the measurement?
1. I measured the speaker in the shop. i brought my laptop , a homemade jig, Limp and a set of non magnetic coins 20,30,50,75 g and a small stand 50 cm high to support the driver. The conditions were not ideal but I managed to get some moments of silence and that's it. The driver was not broken in.FYI I have not purchased the unit yet.
2. At what frequency will the active highpass cross? A clue about why 4 drivers per side?
2. At what frequency will the active highpass cross? A clue about why 4 drivers per side?
You could try a 100-litre sealed box with this speaker, provided the parameters you show are more or less correct. A larger box, besides being heavy and expensive, may not give anything "extra". Also, since there is no excursion data among the parameters, it's hard to guess what power levels you could achieve with this.
On the whole, I would say that this driver doesn't really appear to be "TAME" (pun intended). 🙂
EDIT:
markbakk said:
Though this is usually true, I am of the opinion that it may not be a good idea to consider Linkwitz transform without having any knowledge of the excursion limits of the driver. However, if you insist ... you may try, that's all.
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Judging by the high Qts along with the other less than versatile parameters, this is just a cheap slapped together driver maybe only useful for a large sealed box, open baffle or TL enclosure depending on how much xmax is available.
You can drop system Q to levels lower than driver Qts with skillful and strategic dampening. Is it really worth your while and expenses? Probably not IMHO.
You can drop system Q to levels lower than driver Qts with skillful and strategic dampening. Is it really worth your while and expenses? Probably not IMHO.
