Has anyone tried a chinese AMT ?

[srinath]

Of late there seems to be an explosion of AMT's even in parts-express -

Has anyone tried - Free shipping AMT Ribbon tweeter car speaker-in Speakers from Electronics on Aliexpress.com

At barely 20 a pop shipped - has anyone tried them ?

How about the planar magnetics -
Ribbon tweeter 8 magnetic stripe-inOther Consumer Electronics from Consumer Electronics on Aliexpress.com

Seriously the sawafuji's I thought were very very good in what they delivered. They made excellent emit replacements.

Thanks.
Srinath.

 

[Greebster]

The small one looks like a PE super mini / Airborne rt 20021 and is quite good above 5k but not lower unless waveguided.

No clue on the other, nice price tho

I use the Airborne RT4001's. Which are similar (in size) to the larger one you mentioned.

 

[el seven]

China is the... "you get what you pay for" mfg industry palette.

If an expensive Chinese driver sounds better, then you know why.

I would expect them to sound harsh but i've never experienced them either.

 

[srinath]

I am not sure about that - "you get what you pay for" mantra being appropriate for everything about china.
Chinese have been close behind the japanese in electronics going back a few years. These things take hours and hours of labor from skilled people with small hands. I think its near impossible to match the chinese in that regard.

Metal castings and other machined components - forget it, I'll never buy chinese junk - though I think some of it has snuck onto my wife's accord. My stuff is all not even from this century, so I have very few chinese metal parts if any.

Cool.
Srinath.

 

[el seven]

I was more or less chiming in about materials as well. The Chinese mfr their materials themselves and almost always have copied non-Oriental products. In what i think is true about materials mfd in China - the finer the material mfg the higher the prices can be. Lots of expensive material manufacturing comes out of China now and... there's plenty of low-end materials being produced there.

To wit; not only steel and / or cast portions but the Kapton substrate and circuit metallurgy would be my issue with a wholly inexpensive amt vs. the labor to fold the diaphragm and adhere the conductor, as an example.

 

[Cal Weldon]

We have rules about politics and this is toeing the line. Please discuss these things via PM.

Thank you.

 

[Brisso57]

We have rules about politics and this is toeing the line. Please discuss these things via PM.

Thank you.

In Australia, to "toe the line" means to conform to the rules. I think you meant to say the conversation was getting "close to the line".

Cheers

 

[Cal Weldon]

"Towing the line" is conforming here as in towing the company line.

I was using it mean you have gone as far as you are allowed without crossing that line, like a runner before the starting gun.

 

[Greebster]

Have had a few chinese amts and for the most part are rather difficult to make a poor design unless you're completely inept. Upon those I find little to dislike. One thing that threw me prior to purchasing the rt4001's was a disagreement in the sensitivity spec. Manufacture claims 89dB when others and including myself rate them for 93-94dB. Being purely resistive in nature it's an easy fix passively (resistor) and a pure positive if done active (dynamic headroom).

 

[srinath]

rt40001 huh. Let me look them up. They are AMT's I guess (resistive). I love those.Cool.Srinath.

 

[Greebster]

Airborne RT4001

 

[wolf_teeth]

Airborne RT5002

I've mocked up an as-yet unfinished-cabinet using the RT5002 and a HiVi F6 (Nephila). This AMT advertises as 2.5k+ range and 95dB, but it comes out closer to 100dB, and 3k at the lowest in terms of inherent response. It also needed a notch in the response to flatten it out- but you have 100dB to work with so it's really very okay to do so.

All that said- these sound VERY(!!!) good! I'm also daring to use the term 'holographic', because that is what at least 2 other people used to describe it.



400+Hz valid:


HD of system:


xover:


Food for thought,
Wolf