[tomscy2000]

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Hey guys! This is a really interesting thread. Sadly, I didn't find it until there were over 70 pages of comments. Can anybody tell me if there was a page telling about the finished product? Also, is it necessary to use a crossover as long as you use appropriate drivers together and filter them properly?

No, it's not necessary to use a crossover (see the Sony XBA series), but a crossover is arguably the safer choice, as filtering drivers that specifically using just acoustic filters is tough to do.

 

[piotrus-g]

Quote:

haha... you know me!

so in the end you've decided 3300+TWFK?
Looking forward to your impressions

 

[MuZo2]

Any source for sound tubes for twfk
http://www.knowles.com/search/prods_pdf/TWFK-30017-000.pdf
spout od is 1.4

 

[cyph3r]

I currently looking into buying BA drivers from KA for an DIY IEM project and came across their GQ and GP speakers (latter one is not documented on their homepage but in their PDF design guide) both fitted with tiny crossover circuits.
 
 
They look like an interesting package for an easy setup. Anyone tried these already alone / in combination with other drivers?

 

[piotrus-g]

It seems no one have tried it yet. But you can find GQ in ADDIEM, W2 or SA7 - to give you a glimpse of how it can sound

 

[cyph3r]

Thanks Piotrus-g. I unfortunately dont have either of those, but will give it a try.
 
I have a hard time sourcing those here in Europe (expecially shipping prices). Any other tips expect Mouser / digikey etc where I can source KA BA speakers?
 
I reviewed extensively KA's soldering advice (having read Bilavideos experiences with soldeing BA speakers). Seems to be rather important to stick to that advice (e.g. using a heat sink) since these tiny speakers are easily damaged during soldering.
In this regards, the GP / GQ series offer a great advantage since the cross over ciruit will not transmit the heat to the case, so I anticipate no heat sink needed.  

 

[tranhieu]

Quote:

Thanks Piotrus-g. I unfortunately dont have either of those, but will give it a try.
 
I have a hard time sourcing those here in Europe (expecially shipping prices). Any other tips expect Mouser / digikey etc where I can source KA BA speakers?
 
I reviewed extensively KA's soldering advice (having read Bilavideos experiences with soldeing BA speakers). Seems to be rather important to stick to that advice (e.g. using a heat sink) since these tiny speakers are easily damaged during soldering.
In this regards, the GP / GQ series offer a great advantage since the cross over ciruit will not transmit the heat to the case, so I anticipate no heat sink needed.  

No need for heatsinks, a 25w soldering iron should be enough without giving off too much heat. Another good tip is to tin the wire used for soldering first, that way it only takes fractions of a second to solder the wire onto the BA's pad.
If you can pick up some Cardas solder, it's dirt cheap and melts like butter, no need to apply anymore flux beforehand.
 
Personally smd soldering is way harder than BA

 

[cyph3r]

Quote:

No need for heatsinks, a 25w soldering iron should be enough without giving off too much heat. Another good tip is to tin the wire used for soldering first, that way it only takes fractions of a second to solder the wire onto the BA's pad.
If you can pick up some Cardas solder, it's dirt cheap and melts like butter, no need to apply anymore flux beforehand.
 
Personally smd soldering is way harder than BA

You got a point there, tranhieu, and thanks for sharing the info. I believe that solder alloy you refer to contains most likely lead which lowers the melting point of the solder. Personally, I am trying to move to non-lead solder like SAC especially when the parts a close to the body all the time (liky earphones). Maybe its a bit superstitiuous to get RoHs conform

. Of course that may mean higher melting points and all the disadvantages that come along with it.
 
Yeah, smd is a tricky story but I managed the opamps of two mini3s so far relatively well so I hope it turns out like you said (I ordered one pair of rather cheap "trial" drivers to excercise with).
 
How many IEM's did you complete?  
 
 
 
 

 

[piotrus-g]

AFAIK Cardas, WBT and other high end solders (I know it sounds at least wrong lol) are lead free

 

[tomscy2000]

Quote:

It seems no one have tried it yet. But you can find GQ in ADDIEM, W2 or SA7 - to give you a glimpse of how it can sound

I think the TDK BA200 might also actually be using a GQ driver; it's not confirmed, but the renderings in this official video from TDK looks like so...

 

[ardgedee]

Quote:

AFAIK Cardas, WBT and other high end solders (I know it sounds at least wrong lol) are lead free

Cardas Tri Eutectic is lead-free. Cardas Quad Eutectic has lead.

 

[KarmaIncluded]

Quote:

I think the TDK BA200 might also actually be using a GQ driver; it's not confirmed, but the renderings in this official video from TDK looks like so...

Hint: Its not the GQ!

 

[piotrus-g]

Quote:

Hint: Its not the GQ!

Sonion? How do you know?
 
[Edit] Your profile discription tells everything.

 

[tomscy2000]

Quote:

  Hint: Its not the GQ!

Oh? Curiouser and curiouser...
 

 

[tomscy2000]

Oh, BTW, I wonder if Aurisonics will be willing to sell just the shells of the ASG-1 in the future. That would certainly make it easier to test out new circuit setups without having to pour new molds and such, or even break open the faceplate to make adjustments, since the ASG has a screw-on faceplate...
 
I think there's a good possibility that they will sell parts, since Aurisonics is all about field-serviceability...