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Multi-Way Conventional loudspeakers with crossovers

Trinium, my latest build
Trinium, my latest build
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Old 20th February 2012, 01:44 PM   #1
Mark.Clappers is offline Mark.Clappers  Netherlands
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Default Trinium, my latest build

Hi All,

I like to share my latest build. It's a active 2 way based on the Hypex PSC2.400d modules.

The PSC2.400d is a plate amp loaded with very nice features; 2x UCD400 amplifiers, a SMPS and a powerful DSP.

The drivers are 2 Seas W15LY001 midwoofers and a Fountek NeoCD2.0 ribbon tweeter in a MTM. The crossover is LR8 @ 3.5KHz time aligned.

The cabinet is a closed design with a Q of 0.71. The front is made of 36mm MDF (2x 18mm glued), the rest is 18mm MDF. Internally the cabinets are damped with
"loodbitumen" (2mm) this stuff is also used in car doors, pritex (4cm) and angel hair (100g).

The "filter" thumbnail is not really a filter but more of a safety measure for the tweeter. It's a 50uF capacitor followed by 2 5.6Ohm resistors in parallel. This provides protection against DC and some attenaution and does not influence the filter inside the DSP.
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Last edited by Mark.Clappers; 20th February 2012 at 01:50 PM.
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Old 20th February 2012, 01:45 PM   #2
Mark.Clappers is offline Mark.Clappers  Netherlands
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More photo's.

I live in a really small apartment so my living room doubled up as a workspace for building these speakers... I don't think i've ever vacuum cleaned my living room as much as I did while building these speakers


On a side note: I would like to give Hypex a big . I thought I had a problem with 1 of my modules, I contacted them and got a reply the same day to send the unit back for testing, I did and only 2 days later I had the unit back. They checked it out and said it was oke and the problem was most likely due to something going wrong during the upload of the filters to the DSP. And indeed when I installed it it worked. Very good service!
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Last edited by Mark.Clappers; 20th February 2012 at 02:14 PM.
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Old 20th February 2012, 02:57 PM   #3
Piersma is offline Piersma  Netherlands
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hi Mark,

Great stuff, nicely build !

Already done some SPL/thd measurements on your new creation?
Do you use the 2 Seas W15LY001 in parallel connection?

I really like your speaker stands!
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Old 20th February 2012, 03:03 PM   #4
Cal Weldon is offline Cal Weldon  Canada
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Nice work Mark.
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Old 20th February 2012, 05:53 PM   #5
Mark.Clappers is offline Mark.Clappers  Netherlands
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Thank you all,

Hi Piersma,

Yes indeed I wired the 2 midwoofers in parallel for a 4 ohm load. I just finished the last speaker today so no detailed measurements on SPL capability yet. In theory the pair should be capable of ~116dB at 1M.

Plenty of power in the amps to try this someday, but for now I am tweaking the filters.

The speakerstands are very HiFi, It really takes the sharp edge of the tweeters
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Last edited by Mark.Clappers; 20th February 2012 at 05:58 PM.
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Old 20th February 2012, 05:58 PM   #6
Cal Weldon is offline Cal Weldon  Canada
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Quote:
Originally Posted by Mark.Clappers View Post
In theory the pair should be capable of ~116dB at 1M.
<snip> Plenty of power in the amps to try this someday,
Kind of like bringing a knife to a gun fight isn't it? Impressive on it's own but not intended for that.
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Old 20th February 2012, 06:03 PM   #7
Mark.Clappers is offline Mark.Clappers  Netherlands
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Quote:
Originally Posted by Cal Weldon View Post
Kind of like bringing a knife to a gun fight isn't it? Impressive on it's own but not intended for that.
You're right, they are not designed for very high SPL capabilities. This is the number that rolled out of the sims I did.

They are designed for listening to music and the occasional movie, and with a narrow vertical polar response to suite my room (which is only 20m2).

For the bottom end they have support of a 15'' subwoofer crossed over @80Hz LR4


Edit: just did a very quick measurement which peaked at 102dBc, sounded the same as at 85dBc just a lot louder. Don't want to go much louder than that, and my neighbors agree with that
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Last edited by Mark.Clappers; 20th February 2012 at 06:12 PM.
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Old 20th February 2012, 07:11 PM   #8
Starre is offline Starre  Sweden
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Congrats, hope they sound to your satisfaction!
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Old 21st February 2012, 02:31 PM   #9
Cal Weldon is offline Cal Weldon  Canada
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Quote:
Originally Posted by Mark.Clappers View Post
For the bottom end they have support of a 15'' subwoofer crossed over @80Hz LR4
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Old 20th June 2012, 06:35 PM   #10
redjr is offline redjr  United States
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Excellent craftsmanship. Hopefully they sound as perfect as they look!
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