AIYIMA YM91R20-2F-ZXJ-L1 (3", full range)

[nandappe]

AIYIMA YM91R20-2F-ZXJ-L1 (3", full range) installed in HB-07F-ML (double bass reflex).
It is a low-priced product, but it has a die-cast basket and neodymium magnet.
The sound quality is better than the price. Cost performance is high.

 

[ChefChris]

Very interesting! Did you use the 4 or 8-ohm version?

 

[nandappe]

Very interesting! Did you use the 4 or 8-ohm version?

Hi ChefChris,

Thank you.
I used 8 ohm driver.

 

[circu]

Hello there! I love your work. Why this videos can not be seen in your YouTube channel
? If I click in the video i can see it but if I go to your channel it's hidden.

 

[Cindra]

Copyright block probably

 

[nandappe]

Hello there! I love your work. Why this videos can not be seen in your YouTube channel
? If I click in the video i can see it but if I go to your channel it's hidden.

Due to slanderous posts, 40 videos after July 2023 have been made "limited public".
Only those who know the URL of each video can view it.
I apologize for any inconvenience this may cause and appreciate your understanding.

 

[circu]

This is totally unfair. I'm sorry you had to go through that. You could resume the activity and deactivate the comments on the videos. In any case you have to do what suits you best.

 

[kaameelis]

What is the technical idea behind this enclosure?
I understand it is bass reflex, but what is the rest?
Can it be used really with listed drivers what have so different T/S parameters?
Can it be used with Alpair 5.3?

 

[nandappe]

What is the technical idea behind this enclosure?
I understand it is bass reflex, but what is the rest?
Can it be used really with listed drivers what have so different T/S parameters?
Can it be used with Alpair 5.3?

The system is double bass reflex.
Fewer opposing surfaces reduce standing waves and the use of sound-absorbing materials is reduced.

I do not own Aplair 5.3, but Alpair 5.2 sounds very good.
You can use it without worrying about T/S parameter.

 

[kaameelis]

You mean there are 2 boxes and 2 reflex tubes?
I am interested to change shape of the box in way that tube opening is near the speaker.
Can I simulate it in some software?

 

[kaameelis]

I find VituixCAD can simulate double tuned bass reflex.
I made comparison of FF85WK in optimized bass reflex and in double tuned bass reflex box with parameters from https://www.diyaudio.com/community/...e-w-110mm-h-220mm-d-150mm.400619/post-7384734

It is hard to see benefits of double tuned version (dotted lines) vs. just BR (solid lines).

 

[nandappe]

You mean there are 2 boxes and 2 reflex tubes?
I am interested to change shape of the box in way that tube opening is near the speaker.
Can I simulate it in some software?

Yes.
I simulate it in my head.

 

[Nachmanowicz]

Man been wondering forever, so you'd say Aiyima drivers are good? I live in Brazil and they're one of my only affordable and relatively hassle free drivers to get. Ppl love their amps, but there's very little analysis online on their drivers.

 

[nandappe]

Hi Nachmanowicz.

This driver is a good value for money, I think it's a good one to try.
The drive power is weak and the quality is average, but I think it is well-balanced and easy to sound.

 

[Nachmanowicz]

Yawn, thanks. But it makes me uneasy. I've heard in Brazil (just one guy, but still) that their drivers are more interested in looking like the higher end ones than sounding like them. Also I heard on reddit that they're not even made by Aiyima, but rather relabeled.

A speaker is a lot of work to assemble, so now I'm more inclined to going for the better ones so I don't feel frustrated afterwards....

 

[Pierrick59]

how do you compare it to chn-50p mica?