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Peerless TC9 corner array build (low brow)
Peerless TC9 corner array build (low brow)
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Old 10th October 2019, 09:55 PM   #1
johnnycamp5 is offline johnnycamp5  United States
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Default Peerless TC9 corner array build (low brow)

I thought I'd start a little build thread on a pair of corner arrays I'm going to build using the Peerless TC9FD18-08's.

By low brow, I mean to describe the lack of sophistication of this build.

That I am not a measurement and graph guru like most of the other line array builders appear to be on this forum.
Also the degree of craftsmanship and quality (both in labor and material) of most of the array builds Ive seen is a much higher level than I can achieve (or care to invest the time in).

Its more of an experiment, like some folks using foam-board, but ill use MDF.
Ive long wanted to try my ear at a full length (room height) array.

The decision to corner build is mostly because I have them.
I use corner horns now, and I love the lack of what I perceive (subjectively) as less early reflections, as compared to tower speakers out in the room.

This build is not a desire to replace my corner horns, its a desire to finally hear a full length array. I certainly do not expect them to play as loud or have near the dynamics. Just a different flavor (hopefully good).

Ive attached a pic of the room (basement) where they'll go, and pics of the 60 little TC9 drivers that just arrived.
The room is 14'.5 wide x 28' long x 8'8" high.

The entire ceiling is un-finished, with ultra touch (cotton) insulation showing, so I may have to install a triangle of sheathing above each array in the ceiling corner to get some of the benefits of a floor to ceiling array, but Ill try it without first.
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File Type: jpg IMG_0934.jpg (92.5 KB, 225 views)
File Type: jpg IMG_0935.jpg (75.6 KB, 220 views)
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Old 10th October 2019, 10:17 PM   #2
xrk971 is online now xrk971  United States
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Peerless TC9 corner array build (low brow)
Nice to see a box of 60 TC9’s!
Good luck with your build.
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Old 10th October 2019, 10:24 PM   #3
johnnycamp5 is offline johnnycamp5  United States
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Thanks.

Two boxes lol.
One with 45 and one with 15.

At first inspection I thought they were polypropylene (or plastic) woofers, but looking from the backside they are paper.
They must have sprayed some coating on the face of the woofer.
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Old 11th October 2019, 04:42 AM   #4
xrk971 is online now xrk971  United States
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Peerless TC9 corner array build (low brow)
That’s what TC9FD looks like. Treated paper cone on front. If you look carefully at the back of the paper cone you will see it’s pentagonal shape where it’s glued to the surround. That’s the patented trick to reduce cone resonances. 5 sides breaks up the round drumhead modes and gives it the flat response.
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Old 11th October 2019, 06:24 AM   #5
Halair is offline Halair  Norway
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Welcome to the "club" - I can appreciate the simple approach, which is very similar to what I did when I built my first pair
Kinda "backwards" to think introducing ceiling reflections isnt it??

For a 28-29driver line-up you might need a dummy load to keep the impedance in check.

Wiring Series/Parallell:
(I currently run 4S5P for a nominal 6,3ohm load and mk2 will have two independent groups of 6ohm for each side.)
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Last edited by Halair; 11th October 2019 at 06:47 AM.
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Old 12th October 2019, 10:21 AM   #6
wesayso is offline wesayso  Netherlands
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What kind of EQ do you have in mind? Arrays do need EQ, even if the bottom end is supported by subs. I wish I had a room like that, I'd probably go completely bonkers thinking about the opportunities in a room like that .
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Old 12th October 2019, 03:59 PM   #7
johnnycamp5 is offline johnnycamp5  United States
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Good question, Iíve been thinking about it.
Would a mini 2x4 dsp work?

Iíve built a few two way and three way loudspeakers in the past,
but they used passive crossovers and measured rather flat.
No need for eq.
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Old 12th October 2019, 04:08 PM   #8
Halair is offline Halair  Norway
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Quote:
Originally Posted by johnnycamp5 View Post
Would a mini 2x4 dsp work?
Yes, I hope to use the same for mine once the mk2īs are done.
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Old 12th October 2019, 07:41 PM   #9
johnnycamp5 is offline johnnycamp5  United States
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Quote:
Originally Posted by wesayso View Post
What kind of EQ do you have in mind? Arrays do need EQ, even if the bottom end is supported by subs. I wish I had a room like that, I'd probably go completely bonkers thinking about the opportunities in a room like that .
I'm familiar with your build thread,
and I'll bet your arrays sound amazing... but i'll bet they might sound even better in the very room they were built in!

In my experience big listening rooms are like cheating lol...
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Old 16th October 2019, 06:00 PM   #10
johnnycamp5 is offline johnnycamp5  United States
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I just checked the impedance of all 60 drivers with a multi meter, they all (but 3 or 4) measured right about 6.4Ohms.

I have a GW Instek frequency generator, so I could check each at 1Khz,
or I suppose I could sweep each (manually) but I wonder if this is absolutely necessary...

I hope to starting the baffles this weekend and Ill try and post some pics.
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