Altec Biflex series Horn has been is I is has tech interest research of Horn one of, he of principle on like its beauty China 專 Lee No. 2834424 said, is by two real Paper basin team collection, this two real Paper basin in the between by with high viscous damping real phase, in low frequency when two real earthquake film with earthquake begins to, high frequency when entering into 較 small of earthquake film Club Med ex-Zaventem big earthquake film alone State chasing after begins to, airport armed points frequency little design set in 1kHz. Due to the high frequency time only small diaphragm on the right international Chandler motion, thus extending its high-frequency characteristics of Club Med is much better.
70 Altec 420A Advertising
Biflex series here, 412 stub 419 series 12 inch, 15 inch entering into 415 stub 420 series. 420A 420 is the earliest version of the white box, Web information material on the road seems to be 416 box Stadium stub Magnet include biflex diaphragm, this kind of change is 420Y, is basically a 420A and include a treble, production period between approximately 197x years or so, the coating equipment Ying this same period approximately stub 604-E. Original facility ever learn that promote Altec Altec position because cheap 420 series full range of veneered Stadium except veneered alone installation outside box can also match later rising star Hao corner treble becoming VOT system. Stand on the other hand has posted one 412C a long time ago, have been waiting quite Club Med posted a dominant to a Yes. I compared the Hobby is a 15-inch series, this series has two paragraphs, 415 Fs compared high, look up is for use in design plan to Park, 420A entering into ideal comparison, Fs original facility standard as shown in 27Hz, high frequency 響 Ying Prada 14kHz. 420B: temporary staffing ･ number of information materials on the road, guess the measured specification Ying this approximate 420A, not over the frame is 16 inches, and later 515G a model courses, I I'm this kind of bass veneered Stadium special shine to the big box, 416B or 515B 專 pick in the hands of big box collection.
After I have bought over three Yes 420 series two is 420A, the last bought 420B. This access under the three model courses, I'm posted, but only one is good, another had an accident.
First bought into the 420A in approximately 1999, send Prada when there is a collar, leaving an available, due to ring the worst-case yan, when time, comparison ran briskly want to Tel Aviv, and regarding the century displayed in Hsinchu, a burgeoning 幫 Sir finish off. Second bought in 2000 in the United States study book time, links posted with original equipment box, unfortunately, happen again, a trumpet was probably too heavy to be falling over, and collar, this time I 懶 repair, on eBay, having bought the units 420A veneered Stadium. School everything g when times are difficult, Horn 擺 to the ground on this Ting, what kind of 擺 shock absorbers, so yes is not very impressed with this I'm speaker, the only impression that volume can leave a lot. When the years living in the black area of Philadelphia 44 Street, 鄰 per when I come from Africa with Boom-Box da Sheng playing Dancing Queen when I start Bo on classical music, volume in threes to 12 bit clock, then went out of the door. Qing long me love black 鄰 volume will not want to leave too much, effect of classical music 潛 move could see the evident. This I'm speaker due to too heavy, I leave Philadelphia moved to LA in eBay-Zaventem Mai stuff.
Posted by 420 series for the third time recently 亂 剛 shopping on eBay a coincidence to see a large box I'm 420B, Mai Auction 詞 is Mint Mint, photo overview beautiful veneered Stadium stored here, when Philadelphia's memories in my eyes to see straight posted by price or 貴 decided to bought the, chasing after other total USD$250 for free. Mai says he'll blister coating coating, Nations cannot lose. I thought it treble extension, still another bought always Yes ANV Ribbon Super tweeter, thousands hoping Nations, and received in the two weeks following this one box:
Open box though ~ ~ this is 蝦 meters?
Outside the box view
On port Dragon stick 懸 bian scraps
Has approximately 4-inch crack on the Paper, Yan-collars
All "material o"
Still with a tri-worn over indoor slippers
View dry cleans the outside the box, not a plaster of the sea open all these activities or terms
Not wrong, the box is on the eve of Nations San Jie received, Sheng sheng Mai Jia Kou said he had a blister coating coating, countersink the hole I'm include, port Dragon filled full finish and I cannot contact this ghost is NAO, how poor and I received this much? Speaker without completely fixed, open when one speaker is "sitting" on Paper in the other Horn. Port Dragon chips in a pile Altec speaker 懸 bian is viscous, the most afraid of this kind of crumbs, is difficult to clean up. Miracles with a horn in good condition cannot, and outside in addition to 懸 bian Dou hua. A horn without this operation, Paper Cone pressure crack out one of those ten centimeters long feng, voice coils are stuck. And ten Mai Jia come back to the communications room, Mai 堅 is also set to send the fault, stub he can't activities, coordination gap for a refund, he had only eye-Yes refund USD$50, 亂 not Cheng Yi, last added to USD$100, as if he had closed a model courses. This 項 貨 products are subject to the eBay buyer protection plan o, like eBay's new policy, yes I Experience on eBay or PayPal are not wrong, they are standing in line stance o bought home, so stub Mai under common knowledge not Prada, delivered eBay Conference decision. Over the decision of the CD drive 蠻 fast, less than a day, 額 withdrawal charge, not over I have to send back East West, count about six thousand or seven thousand 塊 capacitor loss, was a handy can't jump 災.
While the veneered Stadium still in hand, parameter quantity at T/S:
=praxis= Thiele/Small Parameters
______________________________________________________
______________________________________________________
Qts = 0.941 Total Q
Qes = 1.130 Electrical Q
Qms = 5.617 Mechanical Q
Fs = 29.402 Hertz, Free Air Resonance
Re = 4.955 Ohms, DC resistance
Ls = 296.3u H, series inductance
Lp = 758.5u H, lossy series inductance
Rp = 1.620 Ohms, loss across Lp
Dia = 310m meters, effective
(%shift) 31.0 %, resonance with mass
Vas = 290.7 litres, air volume equivalent
mms = 80.63 grams, effective mass
cms = 363.4u m/N, compliance
bl = 8.082 T*m, motor strength
n0 = 628.7m %, max efficiency
SplSens = 89.98 dBSPL max @1W absorbed
(Added mass) 90 grams
______________________________________________________
Fs measured in 29Hz, close to the original facility number values, efficiency is much lower than expected, only around 90dB, Po was disappointing, if you want to go with Cardinality will treble treble Hao angle damping a lot. Qts 驚 people cannot study how big the box close to the 50Hz image: there is a real peak Frequency 響 ying, said low-frequency of the box large enough to sink 蠻 low, not over the Tannoy HPD 385 standards cannot be still. View the impedance curve of his encyclopedia, you can see the second resonance Frequency of the individual diaphragm, at about 500 to 1kHz.
Bought the Altec 420 three times, without success, was not difficult really were Curses, then have to find day 廟 goodbye here, hope the next Yes 420 I'll better ~ ~ ~