Ima li netko TS parametre za dynaudio 24W100 4 Ohma bas driver?

DALI je to ovo ?
I hope that this example will illustrate the true power of DPC. I will use an old datasheet for Dynaudio 24W100 as an example. It comes with the following specs (2. February 1986):
Cms = 0.93 mm /N
Vas = 62 liter
Sd = 220 cm2

Here something goes "wrong" because this cannot be true with standard air properties. I can assume Cms = 0.918 = 0.92 mm/N and Vas = 63 liter. It becomes worse if you measure the cone, it is probably around 173 mm in diameter, so Sd = 235 is a better figure. Then if Cms = 0.93 you get Vas = 73 liter.
Mms = 30 g
fres = 32 Hz

Adding the Mms parameter gives you fres = 30 Hz, but if you follow the specified fres you get Mms = 26.6 g. Assuming fres = 31 Hz and Mms = 28.3 g is a compromize.
Bxl = 6.26 Tm
Re = 5.2 ohm
Qms = 1.6

When entering these I get Qe = 0.73 and Qt = 0.50. This is far from what the specs said:
Qes = 0.45
Qts = 0.35
Rms = 3.5 kg/s

I have Rms = 3.45, so that is reasonable. I tend not to believe the specifications from the old datasheet, DPC is much closer to a realistic value of Qe and Qt. By the way, the specs said that the sensitivity is 90 dB/W/m but DPC gets 87 dB/W/m. Mind you, the datasheet says that the Thiele/Small parameters are measured dynamically and not statically. I do not know what this implies, but it does not follow our Thiele/Small model and so it cannot be interpreted in a normal way.

I think this is a good illustration of how powerful DPC is. You enter some known parameters and DPC gives you the other parameters, based on the Thiele/Small model. It will locate any errors or possible misconceptions present in your datasheets. When you work with the Driver Parameter Calculator you can be 100% sure that the driver data is in compliance with the traditional Thiele/Small model.


Dynaudio (06, 08)
Typ fs (Hz) Qts Vas (l) Z (Ohm) d (cm) Pmax (W) Preis (Euro)
15 W-75 55 0,4 7,5 4 - - 140 (08)
17 W-LQ (Esotec) 40 0,4 22 4 - - 165 (08)
17 W-75 XL 40 0,4 20 4 - - 171 (08)
20 W-75 30 0,4 65 4 - - 125 (08)
24 W-75 33 0,84 88,2 4 - - 115 (08)
24 W-100 30 0,47 64,5 4 - - 215 (08)
30 W 54 22 0,36 257 4 - - 250 (08)
30 W-100 20 0,48 409 4 - - 295 (08)

Iz LSPCad programa:

Manufacturer: DYNAUDIO
Model: 24 W-100
Filename: 24W100.UNT
Speaker type: Bass

Sd: 220.00 cm^2
Vas: 62.00 l
Cms: 9.15e-04 m/N
Cas: 4.43e-07 m^5/N
Mmd: 28.15 g
Mms: 30.00 g
Rms: 3.50 Ns/m
Fs: 30.4 Hz
Bl: 8.13 N/A
Re: 5.20 ohm
Le: 0.73 mH
Qms: 1.64
Qes: 0.45
Qts: 0.35
Pmax: 350.0 W
Xmax: 8.00 mm
h: 8.00 mm
l: 16.00 mm

Dobro ih je osobno izmjeriti jer znaju odšetati tokom godina.

Momci,

ovo imam. 24W100 kojeg imam (iz BM15P) je 4 Ohma a RE=5,2 Ohma (kojega navodite) mi govori da se radi o 8 Ohma verziji...

soundnewsdino wrote:
Nisam dugo tražio Dynaudio podatke po netu, ali fakat nema nigdje podataka za 4 oma verziju.
Pa, zar nisam jednom vidio tvoja mjerenja (graf) sa Clio sustavom? S njim je to "piece of cake" napraviti.
Ja ga imam, ali nisam ga koristio 6-7 god., a bilo je i nekih preinaka, drugi PC i harddisk tako da nije ništa s njim rađeno godinama, treba kalibracija i provjera da li je OK. Ako si "za" mogu ti to napraviti, ali ne brzo, kad uhvatim vremena ( u roku nekoliko tjedana ) jer trenutno imam dosta drugih obaveza.

Evo, pronašao sam neke šture podatke za sada:
24W100 4 ohm

Qts = 0,47
Vas = 64,5 l
fs= 30 Hz

Kaj morti spremaš nove zvulje sa Dynaudio drajverima ?

Audison wrote:
najvjerovatnije nešto za sebe jer se driveri više ne mogu nabaviti. samo nekako sam bliže trosistemcu...
bumo vidjeli...

idući tjedan i ja konačno krećem u dynaudio avanturu,drugi put u životu i točno 30 godina nakon prvog uspješnog pokušaja,a tek kad počnem kmečati za u pomoć....
slaže se u kup,30w100,17w75lq,m560d,t330d

Dynaudio drajvere sam slušao u više projekata. Najbolji projekti po mojem ukusu su Totem zvučnici i Ground Zero za autoakustiku.