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Frugel-Horn XL for Alpair 10.3/10p, Fostex FF165wk, more
Frugel-Horn XL for Alpair 10.3/10p, Fostex FF165wk, more
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Old 16th April 2019, 01:33 AM   #1191
chrisb is offline chrisb
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A bit of advice re CNC-ing of Baltic birch or equivalent high quality multi-ply; ensure to adjust tool correction for potential minor variances in thickness for each sheet of material, and allow for some minor “wiggle room” of internal divider and rear panel.
After some futzing about, Planet10 settled on using 15mm ply for the FH3* , with 5mm deep dadoes.
There were far fewer FHXL flat packs, and I’m embarrassed to say I can’t remember if they were a combination of 18 &15, or all 18mm.
*jeeze, that should be 18mm for front baffles to allow for recess / rebate of drivers such as Alpair7.
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Last edited by chrisb; 16th April 2019 at 01:57 AM.
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Old 16th April 2019, 02:32 AM   #1192
planet10 is online now planet10  Canada
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Quote:
There were far fewer FHXL flat packs, and I’m embarrassed to say I can’t remember if they were a combination of 18 &15, or all 18mm
We made 4, all 15 + 18mm.

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Old 19th April 2019, 10:46 AM   #1193
kevner1954 is offline kevner1954  United States
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Bob Iíll take a pair , just saw where your from and no offense Planet 10 but Iím 30 minutes away from Bob , if he can produce , and anyway will save a ton on shipping to NE Pa..Will have to PM Bob ,might have one or two more people interested !!!
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Old 19th April 2019, 03:20 PM   #1194
planet10 is online now planet10  Canada
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Frugel-Horn XL for Alpair 10.3/10p, Fostex FF165wk, more
Kev,

I have been encouraging Bob in the background for some time. We are no longer doing flat-paks so he is no competition. And a vendor in the US will mean less shipping for US customers.

dave
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Old 19th April 2019, 04:55 PM   #1195
kevner1954 is offline kevner1954  United States
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Thank you Dave for that . Now that I have you a question or two come to mind and maybe they were already answered . Regarding high frequency’s and the 11ms driver , will taking stuffing out of the V increase high frequency’s or take away low frequency’s ? I think you told me before the stuffing in the cabinet only affects low frequency????
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Old 19th April 2019, 11:35 PM   #1196
planet10 is online now planet10  Canada
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The damping affects pretty much only the ripple in the bass, althou the felt around the driver aims to reduce reflections back thru the cone — these will be of a higher frequency.

dave
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Old 20th April 2019, 11:46 AM   #1197
JoeyGS is offline JoeyGS  Philippines
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My room had corner bass traps for the longest time even before I had the FHXL/MAOP. While the MAOP provided more bass than the 10.3M I was still not happy how they are performing. I removed the bass traps and retained the front wall diffusers. Fired up the system .... there was no boom or reverberation from the room ... sound became more open; even the mids and highs improved. Quality and spl level of the bass is now better.

Thanks for clarifying the behavior of the rear port for the back loaded horn.

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If you are corner loading them it certainly would screw things up.

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Old 20th April 2019, 11:53 AM   #1198
JoeyGS is offline JoeyGS  Philippines
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Is there such a thing as over stuffing at the back of the driver?
Aside from the cotton felt lining, when fiber fill liners are used, they tend to expand than just lining the internal baffle .... if they expand and fill in the space at the back of the driver, will this be detrimental to the high/mids frequency response of the driver?

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The damping affects pretty much only the ripple in the bass, althou the felt around the driver aims to reduce reflections back thru the cone ó these will be of a higher frequency.

dave
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Old 20th April 2019, 12:26 PM   #1199
Eric is offline Eric  United States
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Frugel-Horn XL for Alpair 10.3/10p, Fostex FF165wk, more
I'm certainly not super skilled at woodworking, but I'm also not a novice and have built my share of things over the years. Having said that, I would certainly find it worthwhile to pay someone for a flat pack if I was making another pair of FHXLs. I also know that not everyone has ready access to baltic birch.
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Old 20th April 2019, 04:01 PM   #1200
planet10 is online now planet10  Canada
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Quote:
Originally Posted by JoeyGS View Post
Is there such a thing as over stuffing at the back of the driver?
Aside from the cotton felt lining, when fiber fill liners are used, they tend to expand than just lining the internal baffle .... if they expand and fill in the space at the back of the driver, will this be detrimental to the high/mids frequency response of the driver?
A splash of damping behind the driver might improve the top, but not too much and not too close.

dave
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