Correct me if I'm wrong. From my understanding when building 4344mk II crossovers for active biamp the following components crossed with red X'es are unnecessary since the signal goes thru a path as drawn with black lines.
Here are partly finished crossovers from my friends 4345 4344 mkII hybrid project. I plan to make mine on very similar parts since I'll be ordering from the same supplier. maybe with the difference of air coils but why bother if the sonic result will be satisfactory utilizing iron core. Any opinions on them judging from the foto?
And here are the Italian gems:
I never thought I'd have a pair of drivers with original red wax seals. DCR measures about 5.5R on both. Weird? My new d8r2425h's measure 3.2r
BTW the gear from Italy has been attempted being delivered today. <-(is this a sentence?)
Got a refund for the 2231 woofers. Couldn't be happier.
Hit and score: http://cgi.ebay.pl/ws/eBayISAPI.dll?...ht_3913wt_1344
Looks like I will be missing only a pair of 2405's soon to have drivers for both 4344 and 4345. This day couldn't have been any better.
Hmmm... Has the 2245 been reconed or refoamed with non-JBL kit? The gasket should measure 15mm wide, and the one in the picture seems smaller.
I'm 100% shure both cone and surround are original JBL. The gasket though does seem non OEM upon closer inspection but I couldn't care less (or should I?). Hopefully the pair that will arrive is going to have JBL cones... I shall see if the woofs will need a refoam then.
In the mean time I celebrate success in terms of ebay blitzkauf.
A nice slender yet hefty active crossover has arrived at my doorstep today. A nakamichi ec-100. It has a 3 gang 21 step alps pot for shifting the crossover freq and two other alps pots for high and low level adjustments. Seems like the perfect solution for a active 4345. I just need to build a power supply for it.
BTW does anyone recognise the DC input connectors?
Looks like a 4-pin DIN connector.
Thanks for clarification Lee. It appears it's cheaper to buy one of them online direct from China than even attempting to think of finding one locally. http://www.ebay.pl/itm/DIN-male-Plug...ht_2589wt_1110
I have a serious fatum it would appear when it comes to this project. The 2245's arrived, packed very well, no obvious transit damage I even completely unpacked and examined them prior to signing the reception bill. Next I lay em on the carpet to examine cone movement and bam - one speaker has the VC nearly stuck. It barely moves and stays in the position left in when manually shifted.
I'm a bit concerned since payment was wired not paypaled. I think I might never again think of gathering drivers for a clone project. It's like every speaker transaction is a failed one.
Anyway is it possible that they suffered during transit? I've already had a pair shipped in from Rich who is twice as far away and there was'nt a problem of this nature. I'm kinda sad. Buying JBL speakers is like underwater blindfolded deerhunting.
I'd still contact the seller. Explain that the package was not damaged in transit, and that one driver is sticking. Did you buy off eBay?
Yup - from ebay. I already contacted the seller - Germans are stand up people for the most part. But there is some good news already. I always let things cool off before starting a nightlong session of crying so I placed the drivers face down magnet up and let them relax for an hour. Flipped back over for a quick check and the situation was no where near as critical as before. I managed to move the cone around with only slight rub. Hopefully it was only the suspensions that temporarily got mangled due to being in transit in a cold envoirment tightened down F2F with zip ties one magnet facing ground resulting in the cone being pushed down by the other one. That dude Newton was quite mad fella.
My hopes are back up.
I tried to take down a DCR measurement, but the readout keeps fluctuating. After a good 10 minutes I managed to note down 5.3 on both but occasionally it still fluctuates. Any ideas on that? Maybe there is some condensation inside the speaker interfering. Of course I was not moving the cones while measuring.
I don't remember mentioning problems with a diaphragm buy from last month. Paypal had refunded my payment. Two days later USPS tracking changes status to passed customs. I now have to visit their office to declare their value and they should be here in a week... How awesome! I guess I will have to refund the refund .
Now I shall post a pic of all JBL gatherings so far:
Reminds me to my own gathering a while back, pretty similar except I just went for the 15" variant as I didn't have room back then, for the large footprint of the 4345.Now I shall post a pic of all JBL gatherings so far:
CC'ed 3145 xovers and aquaplassed diaphrams (thanks Giskard) were in the mix nonetheless.
Looking forward to read more about your progress with this project.
I'm sticking to 15" woofs after all. The 2245's are defective - one has the VC stuck pretty bad, the other one has VC rub when playing. I think someone did a very bad job reconing them, and after that they were not played. What a loss of original recones... Too bad #1: the seller is evading me now. Too bad #2: I paid via wiretransfer. Kinda fukkt. That still didn't stop me from grabbing a second pair of 2405's. Now all I have left to source is a pair of 2235's and some 2307's to be in posession two complete sets of 4344 hybrid mk II speakers.
I have to say the worst part of all this cloning business is gathering usable speakers. Every second buy I make ends up to be junk or defective gear (of course ads list otherwise). It's disturbing and discouraging. On a side note I lately discovered my marantz pm 14 had defective xlr inputs. I took it to a specialist and he told me the amp might have been previously lightningstruck and it also took a bad fall to the ground. It too was bought off ebay.de. Bill: 200eur. I never had such problems when buying used gear from Poles, so it turns out that either Germans aren't as stand up as they used to be or Germany is no longer populated by Germans (for the most part). I keep seeing Arab Indian and Chinese last names on bills from DE. Just a random rant.
I'm in the process of ordering 4344 cabs - my carpnter quoted me with a cost of 710eur or 970usd at todays exchange rate. That's cheap (I think). Should I get them painted or just oiled up?
I love those x-overs Fangio. I have to order components for mine soon too so I can spend a month trying to figure out how to make them so clean and organised. Crossover porn = win.
Amnes, I suggest sticking to 2245. I have 2235 and 2245 and the 2235's output is clearly lower than te 2245. Much less authority. As for the 2445 with stuck cone, hopefully it is not from a shifted magnet.
A lesson learned here too. Always pay with Paypal. Any seller on eBay requiring a bank transfer is most likely going to be a scammer. Also, pay as "good" and don't skip the 3% fee, it is your insurance.
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