[Xymordos]

I've got sample batch from them. Can't speak to how they are matched because I only tested 1 unit of each I got. They are definitely very expensive - like 5x-10x regular DD (at industrial scale). Maybe if you are building smth for yourself you could probably justify spending $10-13+shipping on a single DD. The electrostatic 7mm tweeter is interesting but nothing to write home about because the spl is relatively low so for multi BA setup you'd probably need at least 2pcs per side and that's just impossible to fit into an IEM. I think they have a store on Aliexpress.

I bought a sample batch of 20 or something, and they were pretty badly matched, might be just bad luck for me. The pair that came in the KZ CRN was actually off by 20db on one side lol. They also had super strong magnets in them - I don't think they can be used too close to the BA drivers.

 

[musmecca]

Maybe a good multimeter is in my books later on. This one is fine enough. Cheap chinese one that came with my soldering iron, but the best I've had. Just this issue is the problem I'm facing.

Edit: Scratch that. Found out the caps I have are waaaaay too high of value so they were pretty much killing stuff. Ordered specific values from a popular dealer.

Id suggest getting a dedicated capacitance meter if you don't already. You will find HUGE variations in readings from caps that are supposed to be the same value. Also, I find the annotations on the cap that denote values impossible to decipher and impossible to see on small caps! Then again, my eyes are old.....

 

[musmecca]

Just received some of the new BA's from Knowles....RQU-35066, RAQ-33862, RLQ-34240, RAU-34832, RDI-33438, and RDU-35000...Davin Moorman (thanks!) at Seltch hooked me up. Anyone done any prototyping with these and have any pitfall, suggestions, builds, don't do, etc? The super tweeters (rau) don't hit 100db until 6-7Khz so it will HAVE to be paired with another mid/high. The double spout on the RDU-35000 supertweeter is kinda odd as opposed to a single....any application advantages that come to mind? Last the superwoofers (RDI) seem like sonion 38 equivalents....anything I'm missing? Going to start prototyping this week...

 

[BadgerMcBadger]

Id suggest getting a dedicated capacitance meter if you don't already. You will find HUGE variations in readings from caps that are supposed to be the same value. Also, I find the annotations on the cap that denote values impossible to decipher and impossible to see on small caps! Then again, my eyes are old.....

yep i wanted to mention it but forgot. dedicated capacitance meter will make a much larger diffrenece than a fancy multimeter, most of them have similar accuracy anyway

 

[kmmm]

Just received some of the new BA's from Knowles....RQU-35066, RAQ-33862, RLQ-34240, RAU-34832, RDI-33438, and RDU-35000...Davin Moorman (thanks!) at Seltch hooked me up. Anyone done any prototyping with these and have any pitfall, suggestions, builds, don't do, etc? The super tweeters (rau) don't hit 100db until 6-7Khz so it will HAVE to be paired with another mid/high. The double spout on the RDU-35000 supertweeter is kinda odd as opposed to a single....any application advantages that come to mind? Last the superwoofers (RDI) seem like sonion 38 equivalents....anything I'm missing? Going to start prototyping this week...

How many did you have to buy?

 

[musmecca]

How many did you have to buy?

I got two of each as I was prototyping and they were cool with it. I didn't ask about minimum qty as I got this on the tail end of some other components I bought from them. I got the impression their stock of these was not huge to begin with......

 

[swtnate]

I got two of each as I was prototyping and they were cool with it. I didn't ask about minimum qty as I got this on the tail end of some other components I bought from them. I got the impression their stock of these was not huge to begin with......

I was asked to buy 100 pcs to add on any proto drivers

 

[CBTlover223]

I bought a sample batch of 20 or something, and they were pretty badly matched, might be just bad luck for me. The pair that came in the KZ CRN was actually off by 20db on one side lol. They also had super strong magnets in them - I don't think they can be used too close to the BA drivers.

Maybe its because I only purchased 2 of each, but luckily, the pair (7mm) I got seem to be fine apart from a slight variance in impedance that probably due to the capacitor that comes soldered with it. It does seem to want to stick to things though. I think Ill try pairing them with the dual rab from e audio and see what I can do from there.

 

[swtnate]

That new Quad set-up I was telling yall about is being put out into the wild!

 

[JEHL]

WHat's the largest DD that's possible to cram into an IEM? Would I want to implement one in a dual DD with a tweeting one or a hybrid?

 

[swtnate]

WHat's the largest DD that's possible to cram into an IEM? Would I want to implement one in a dual DD with a tweeting one or a hybrid?

. In a custom IEM, your ear size would determine it. OR, you could extend the shell out past your ear. If I had to make a maximum determination I would say 10mm - 15mm. I personally would rather a BA for the high end and use the DD to cover the sub- low.

 

[Audio Fun]

If anyone can help me, I’m stuck on this.

The yellow line is 29689+30095. Blue line is a 10mm DD with yellow damper/100ohm resistor. As you may see the bass driver is not loud enough to match the curve to the BA driver. (So the bass DD has to go all the way up to 44Db to match it)
Any solution will be really appreciated

 

[swtnate]

If anyone can help me, I’m stuck on this.


The yellow line is 29689+30095. Blue line is a 10mm DD with yellow damper/100ohm resistor. As you may see the bass driver is not loud enough to match the curve to the BA driver. (So the bass DD has to go all the way up to 44Db to match it)
Any solution will be really appreciated

Take away the 100 Ω resistor. Zobel the armature. Then, test to see how much you need to lower each driver’s volume. L-pad each driver with the correct resistor sequence.

 

[piotrus-g]

If anyone can help me, I’m stuck on this.


The yellow line is 29689+30095. Blue line is a 10mm DD with yellow damper/100ohm resistor. As you may see the bass driver is not loud enough to match the curve to the BA driver. (So the bass DD has to go all the way up to 44Db to match it)
Any solution will be really appreciated

Lose the 100 Ohms resistor - use maybe 10 if needed. Also yellow filter will rob you from a few dBs of SPL, orange or red would be better to gain headroom.​

 

[Audio Fun]

Thank you guys, I’ll give it a try and see how it go. Much appreciated!!