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Multi-Way Conventional loudspeakers with crossovers

HiVi F6 project
HiVi F6 project
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Old 19th May 2017, 07:16 AM   #11
Lojzek is offline Lojzek  Croatia
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Are you all aware that we are in the process of busting up the traditional commercial loudspeaker industry? In about 50 years everything will be DIY. lol
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Old 19th May 2017, 11:10 AM   #12
anji12305 is offline anji12305  United States
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There will always be a (much larger) market for professional audio for sound reinforcement. That's where the research starts and eventually finds us at home.

Most of what gets sold in North America as "high fidelity" is plagued by distortion, inefficient motor design and bloated costs.

Contrast this to the competitive PA market.

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Old 19th May 2017, 01:47 PM   #13
troystg is offline troystg  United States
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Quote:
Originally Posted by wolf_teeth View Post
Thank you! I really liked that design, and it looks pretty good too!

Later,
Wolf

Click the image to open in full size.
Absolutely gorgeous speakers!!!

I may have to build a set like that with the amp on top where the XO is located.
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Old 19th May 2017, 02:42 PM   #14
wolf_teeth is offline wolf_teeth  United States
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I normally leave the xover on the floor. I think you saw the build thread where they were just placed there temporarily.

Anyways- thank you! The colors are Black and Dark Cherry with gold accents.

Later,
Wolf
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Old 21st May 2017, 08:28 AM   #15
Rakeem is offline Rakeem
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There are a plenty of good performances with F6 driver.
Like this one: 6moons audioreviews: Cygnus Audio Quasar/DiSub X15 but the box is sealed.
And this one: Hypex Amps, Abrahamsen Audio, IPL Acoustic Speakers
But i am making this one: Exproject - ????????? - ??????? ?? ??? - Swans - M1.2 EX KIT with another tweeters and two of thеse Exproject - A???????? - ????????? - Monacor - BR-45TR to get this result
Vb = 15.5 liters
Fb = 55.09 Hz
QL = 7
F3 = 59.32 Hz
Fill = normal
What do you think about it, is it good enough or it can be done better.
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Old 21st May 2017, 02:40 PM   #16
Dissi is offline Dissi  Switzerland
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Hi Rakeem,

Difficult to say. Different TS-parameters have been published for the HiVi F6, and ports in the corner of a cabinet do result in a lower tuning frequency anyway. I would expect around 46 Hz for two BR-45TR ports in your cabinet. That's reasonable IMO. For comparison, HiVi recommends a tuning frequency of 45 Hz in a volume of 15 liters.

I assume the crossover will be more of a problem than the reflex tuning. What crossover and which tweeter do you plan to use?
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Old 23rd May 2017, 09:09 AM   #17
Rakeem is offline Rakeem
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Quote:
Originally Posted by Dissi View Post
Hi Rakeem,

Difficult to say. Different TS-parameters have been published for the HiVi F6, and ports in the corner of a cabinet do result in a lower tuning frequency anyway. I would expect around 46 Hz for two BR-45TR ports in your cabinet. That's reasonable IMO. For comparison, HiVi recommends a tuning frequency of 45 Hz in a volume of 15 liters.

I assume the crossover will be more of a problem than the reflex tuning. What crossover and which tweeter do you plan to use?
Hi Dissi,
the accurate parameters can be found here Exproject - ?????????? - ?????? ?? 6" ?? 12" - HIVI - F6, 45hz would be fine, but i don't understand why they suggest me so high setings with these ports, especialy F3!?
I don't worry about the crossover, they will make for me a good one. The tweeter is Hivi T28.
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Old 23rd May 2017, 10:31 PM   #18
Dissi is offline Dissi  Switzerland
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Hi Rakeem,

Parameters and curves published by HiVi should be taken with wariness since independent measurements often show different results. For the F6 woofer that's higher Fs (~54 Hz), higher Qts (~0.5) and lower mass (~14 g). Therefore there's an uncertainty which TS-parameters are correct and this also affects volume and tuning of a vented box.

The promise of F3 of 42 Hz in a 15 liter box is pure marketing and far from reality. The figures from your Swans representative may look less impressive, but they are much more realistic.

There's not much you can do. If space allows increase the volume to 20 liters (the volume of the M1.2EX), and try different tuning frequencies.

Attached is a comparison of the bass performance of different alignments. The simulation is based on modified TS-parameters and includes a series resistor of 0.5 ohm (woofer coil) and the influence of baffle step as well. This is how things looks from my point of view.
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File Type: jpg EnclosureRecommendationsHiViF6.jpg (202.6 KB, 137 views)
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Old 25th May 2017, 08:33 AM   #19
Rakeem is offline Rakeem
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Thank you Dissi, maybe i gotta find a better solution for these boxes, to get a better sound in low range.

What do you think about this one:
Hivi F5 and tweeter in 2l. sealed volume with Hivi M5N in 13/14l. like a sub.
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File Type: png 3 way.png (14.4 KB, 118 views)
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Old 25th May 2017, 12:30 PM   #20
Dissi is offline Dissi  Switzerland
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I think you shouldn't overrate these F3 figures. Between 50 and 60 Hz is absolutely OK for a speaker of that size, especially when it is placed close to a wall or even in a corner. A 3-way is much more complicated and expensive. Running a 5" driver down to 40 Hz is not reasonable in my opinion because it isn't really capable to go loud.

My advise would be to stay with your original project.
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