TBH: That looks really bad off-axis
TBH: That looks really bad off-axis
2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)
Here we go.
Note that all this is preliminary with no listening tests and the first measurement. It WILL be modified.
And yes there is a 40Hz room mode.
first 20Hz to 20 kHz
second 40Hz to 40kHz
Very valuable work indeed. Real data under "real operating conditions". Thank You.
Looking at the response curve, may be one experiment can give interesting results: to connect MF driver in different polarity. Such may be 'flatten' response in crossover regions (around 800Hz, and may be at very high say over 16kHz).
One thing more, if possible, to measure the response, say about at 30 deg off-axis. I expect much more 'irregularities' over 5kHz, but may I am wrong.
Looking to your 'independent' measurements, and your experience :
"...and the red shows the comb filtering. The effects are at such high frequencies and fairly subtle... I certainly don't the difference....."
and concerning the MF-driver-476 capabilities I think that UHF 045 driver is present in original DD66000 design just a "marketing MUST".
On the other side Guido's nice work, may be encourage some of us, to try DIY project with much more "affordable" drivers
( lets say 2234+2234 + 2446/5 + 2402-05, or even 2245 + 2446 + 2402-05) off-course with lot of work in the crossover networks.
Regards
Ivica
On my option, the advantage of the DD66000 : there is really only one crossover point about 750 Hz...,and, fortunately almost the whole audio bandwidth is "covered", owing to MF driver fantastic capabilities, and large horn good matching and wide dispersion.
Concerning the K2-S9900 information about total "emitted" sound power given in:
http://www.audioheritage.org/vbullet...l=1#post252245
http://www.audioheritage.org/vbullet...1&d=1242930780
that new H66000 horn is kind of "miracle"
Here are some pics of the assembling process.
Sub, LF and UHF boards are ready. MF boards are still outside the cabinet on evaluation boards. That's why FR curves need to wait a bit.
Pic 1-5 crossover boards outside and inside cabinet
Pic 1: UHF board
Pic 2: MF and UHF driver inside cabinet
Pic 3: evaluation board (controlled chaos )
Lying on it's back
Woofer and spikes installation
"I'm too sexy for my cat" - said the Everest.
Retarded quality craftsmanship. Are those black mundorf caps bipolar elkos?
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