Yes, all sizes box, to build. It would be my first onken. I have no experience.
I have a height limit of 95 cm. Thank you.
I have a height limit of 95 cm. Thank you.
First strike, using pop as a reference.
Second strike, suggesting an amp can make music sound "slow and heavy."
Third strike, "...music struggling through a sea of subjective treacle."
Sometimes I wonder if the reviewers are suffering through a bad acid trip when they write this stuff.
😀
Hmm, strike 2, 3 make no sense to me WRT SS such as this one, but tubes, a different matter IME.
Regardless, we all hear the same, yet not so much, so for modern electronics' reviews all I want to see is measured specs to choose from.
GM
Regardless, we all hear the same, yet not so much, so for modern electronics' reviews all I want to see is measured specs to choose from.
GM
OK, you say 'all sizes box', meaning can be any size necessary, but then say you have a height limit, so is this the tallest the box can be or is this the distance from the center of the driver to the floor?
GM
Sorry. Wrong translator. Dimensions measures to build the box. height max 1 meter. is ok 95cm. speaker position in the center. thanks
What dimensions have people used for the cabinets? I'm about to build this when the drivers arrive and my main concern is getting the correct 'Onken' ratios.
Using the calculator, which is more important: the L' vent (=35cm) or S vent (=Sd or no less than 15% less than Sd)? Can't seem to get both within the ideal values...
Using the calculator, which is more important: the L' vent (=35cm) or S vent (=Sd or no less than 15% less than Sd)? Can't seem to get both within the ideal values...
I couldnt find any drawings...
I just measured with a ruler...
My dimensions are:
60cm wide
40cm deep
81,6cm high
baffle is 44,8cm x 76,4cm ... 0,5cm recessed...
Vents are 30cm deep and 4cm wide...
18mm multi birch
I just measured with a ruler...
My dimensions are:
60cm wide
40cm deep
81,6cm high
baffle is 44,8cm x 76,4cm ... 0,5cm recessed...
Vents are 30cm deep and 4cm wide...
18mm multi birch
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OK, note that with a ~91.2 cm inside vertical dimension it is just barely long enough for it to affect the position of the woofer, so is it OK to move it up from ~45.6 cm to ~52.53 cm [better] or ~59.37 cm [best]?
I presume this is a new driver with revised specs?
GM
TTBOMK, there's no such thing as correct 'Onken' ratios for cab dimensions; for instance, the Onken 360 doesn't use either structurally pleasing or room ratios or 'golden' ratios [all recommended] for the box or even for overall dimensions, apparently under the assumption its box has a ~uniform particle density same as a typical reflex, sealed alignment, which is fine for the Petite Onken or any other ~ square to rectangular box that doesn't have its baffle board inside long dimension > ~35-36"/90 cm [i.d.].
'L' vent is more important, though 'S' vent ideally needs to be large enough to have a lower than normal ~ 5% vent mach [~17 m/s].
Anyway, a nice 360 documented build: Ispra.Net - Audio
GM
@hifisucks - your pictures won't open anymore - any chanceyou could fix that?
I've got my Beymas waiting in the cellar, and before I order wood I'd like to check out your construction again 😉
Cheers
Es
I've got my Beymas waiting in the cellar, and before I order wood I'd like to check out your construction again 😉
Cheers
Es
I have quite good experience dealing with 15XA38ND and trying to get good sound for indoor use. It is a hard job to get decent bass from this driver below 60-70Hz. I've designed a new XO network for this driver. Woofer is second order at about 1400hz with a parallel notch filter and tweeter is 4th order. the notch filter will sacrifice some dBs but with much better bass. the final sensitivity of speaker will about 91-92dB and with 45hz flat response and f3=38hz. it will go down to about 33-34hz in interior. my cabinet is 110cm tall, 48cm width and 50cm depth with about 240-250 liter of volume. afterall I think it sound pretty good for what it is. sounds lush, detailed and vibrant with damn good imaging and coherency.
this is the final frequency response (smoothed 12dB).
this is the final frequency response (smoothed 12dB).
Interested on xo network if you interested in sharing... ive got a pair of 12cxa400Nd that beyma recommends the same generic beyma 2way xo network for all their 12/15" coaxial drivers...
Thanks for sharing the Xover info. Also interested, currently running these Beymas first order. That is quite a significant hit to the sensitivity though.
According to my own bass reflex cabinet with ~250l volume tuned to resonance frequency and actual measurement of frequency response and ZMA from datasheet the final frequency response with this XO would be something like this. there won't be any real bass at the end:
I must say, that I have plenty bass response even with my enclosure with ca. 200l...
Maybe the relations in size matters more than theory... ?
But who can build 10 boxes and listen which is the best... ?
The room helps with the socalled theoretical missing bass... or sosmetimes the other way around...
I am very pleased...
Even with only 1.5W from my el84... or 5W from the great DIY Class-A 2SK1058 MOSFET Amplifier...
DIY Class-A 2SK1058 MOSFET Amplifier Project
Maybe the relations in size matters more than theory... ?
But who can build 10 boxes and listen which is the best... ?
The room helps with the socalled theoretical missing bass... or sosmetimes the other way around...
I am very pleased...
Even with only 1.5W from my el84... or 5W from the great DIY Class-A 2SK1058 MOSFET Amplifier...
DIY Class-A 2SK1058 MOSFET Amplifier Project
Plenty of bass after mass loading these cabs and using a 2.6W el84 amp. For reference, night is approx 1200 inc. castors.
Reckon driver burn in is crucial to the performance.. the first few hundred hours were light on in the LF (using same amp).
Reckon driver burn in is crucial to the performance.. the first few hundred hours were light on in the LF (using same amp).