Why do my 288-8Ks sound like cr@p?

**vuki** · May 30th, 2012, 08:15 AM

Originally Posted by Earl K

Coen ,

As far as I'm concerned you've nailed it ( a bad batch of diaphragms , ( metal related ) ; too thin, wrong Alu mix, wrong metal prep, etc. etc. ) .

Distortion in that elevated area is particularly noticeable to the human ear ( & I really have no idea what internet based cool-aid Vuki is drinking when denying the audiblilty of distortion / I have my suspicions that it starts and ends with the initials E.G. ) .

I'd love to see some sweeps of your 802s ( Fr & Dist ) on the same 511Es ( that would be a learning experience for all of us ) . When you have time .

Thanks for the educational thread ( now you know & now we know ) ><

I guess that 2kHz distortion hump would be at least somewhat reflected on freq response of the driver, wouldn't it?

BTW Beer is my drink of choice.

**Coendert2011** · May 30th, 2012, 09:13 AM

Originally Posted by vuki

I guess that 2kHz distortion hump would be at least somewhat reflected on freq response of the driver, wouldn't it?

BTW Beer is my drink of choice.

Good point, however these are the distortions @ 2kHz, so D2 is 4kHz and D3 is 6kHz! You can see the little response bumps in the smoothed curve at these frequencies. furthermore the level is worst case about 30dB below the response line, if distortions were absent the response line would marginally be lower.

Coen