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Old 8th April 2012, 03:03 PM   #831
zman01 is online now zman01  Bangladesh
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G'day Dave! It must be 2 am in Brisbane now?

95 dB... hmmm... maybe P10 Dave can comment on that since I haven't got the experience. For pop and rock I still suspect the material more than your gear! As you've rightly stated most of the stuff get's painful at high dB if you're looking for details. One possible solution is bi-amping - I am experimenting with that positive impressions.

BTW, if you don't mind me asking, what are your room dimensions?

-Zia
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Old 8th April 2012, 03:28 PM   #832
chrisb is offline chrisb  Canada
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It would be nice to guarantee you're wrong about the "limitations" of the Alpair7.3 for your application in this or any enclosure, but only you can be the final arbiter of that.

The Fostex FE126 does have a bit more of a dynamic "jump" factor and forward midrange presentation that I find gives them a subjective impression of being louder than they actually are - a characteristic that some folks find fatiguing ( I don't particularly), but the Alpair is much more refined in lower level details and extends the "3D" soundstage much deeper behind "the back wall".

I've not heard a direct A/B comparison of these 2 drivers in the FH3, but have had enough exposure to them both in many other types to conclude these characteristics are definitely those of the drivers, not the enclosures.

Your separates system would easily accommodate a simple passive line level HP - whichever drivers you decided for FH3, reduction of this LF excursion would contribute significantly to their attainable SPL, as well as improve midrange dynamics and clarity.
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Old 8th April 2012, 07:43 PM   #833
cberger is offline cberger  United States
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Default Size of felt pieces?

Hi,

What sizes did you guys use for the felt pieces? Can't figure out from the drawings how long the pieces on the inside of the back panel, and the one on the internal deflector board have to be.

Thanks,
Christian
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Old 8th April 2012, 08:08 PM   #834
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Quote:
Originally Posted by dpastern View Post
I have some questions - how easy are they to assemble?
I have seen a blog post on Ben's flat-paks which, IIRC, has some ink on assembly. Ben's roughly follow our flat-paks and they are quite easy yo assemble... with patience they should be doable with masking tape & the contents of a bookshelf.

Frugel-Horn Mk3 Flat-Pak Mock Assembly Instructions

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Drivers - so many drivers.
Given the quality of the support gear, A7.3 is a very good bet

Quote:
... Opera Consonance Cyber 845 SETs;... Sonus Faber Electa Amators

The problems are that my system seems to harden up at medium levels and get shouty and confused
Most likely the interaction of the high output impedance of the SET and the ugly impedance curve of the SF

Click the image to open in full size.

You are going to get a big peak right in the range of where the XO pushes the impedance skyward, right in the ear's most sensitive area, and, as you turn up the wick, right where the equal level curve where you would have that portion of the spectrum dialed back

Any full-range driver will have an impedance curve (both magnitude & phase) that the SET will be MUCH happier with.

Quote:
And how tall/deep are they (I couldn't see any published tech specs for the cabinets, but I've probably missed it on the site).
Link to the post with the most current planset in post 1 of this thread: Frugel-Horn Mk3 Builds & Build Questions

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PS Anyone in Brisbane, Australia that has one of these horns in their system that I could listen to for a bit with some of my music?
I'm gonna guess yes.

dave
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Old 8th April 2012, 08:17 PM   #835
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Quote:
Originally Posted by zman01 View Post
I do not want to derail you from your though process on the FH Mk3, but if you like rock and pop, and would like to turn it up sometimes, I would recommend adding helper woofers in the future if you feel the need. One of the key minds behind the FH Mk3 Dave Dlugos (aka Planet10) recommends helper woofers for the FH Mk3 crowd who are looking for more bottom extension
Or start with EL70. For those with FE126 in their FH3, and no corners, decent bass extension requires helper woofs, with EL70 & to a lesser extent A7, not nearly as much.

Treated EL70 can approach stock A7.3 in terms of DDR, reach deeper in the bass,are more robust, and are somewhat more tolerent of lower quality source material (or amps, but i don't think you have that issue)

dave
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Old 8th April 2012, 08:27 PM   #836
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Quote:
Originally Posted by dpastern View Post

SPLs (I wanted something above 95db SPL and I don't think that these horns/alpair drivers will do that from what I've been reading. Which means I'm back to square one. Correct me if I'm wrong.
Your SET is something like 18W? Unless you listen at crazy levels, in a really big room i wouldn't worry about getting that kind of efficiency (the FE126 does get close to that thou -- it is the fave of those with 2-6 w SETs). I have 20W and a biggish room (and an amp that likely doesn't overload with quite as much grace as yours) and have no issues with A7/EL70/CHR

When people talk about SETs and efficiency they ignore that the nature of the impedance curve is MUCH more important.

Factoring into this whole thing is the unresolved conundrum that Mark Audio drivers are happier with amps much smaller than "common wisdom" would suggest. I have one customer who was very pleased with the levels he got in his largish room, with CHR70 (1st gen/82 dB 1w/1m) and his 3.5W SE

dave
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Old 8th April 2012, 08:31 PM   #837
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Quote:
Originally Posted by cberger View Post
What sizes did you guys use for the felt pieces? Can't figure out from the drawings how long the pieces on the inside of the back panel, and the one on the internal deflector board have to be.
Not critical. they can be estimated from a comparison of the damping drawing and a drawing with dmensions. I could measure the peices i ship with flat paks. I can say that the front piece that folds over the divider is almost square so about 145mm long.

dave
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Old 8th April 2012, 08:47 PM   #838
cberger is offline cberger  United States
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Thanks!

Quote:
Originally Posted by planet10 View Post
Not critical. they can be estimated from a comparison of the damping drawing and a drawing with dmensions. I could measure the peices i ship with flat paks. I can say that the front piece that folds over the divider is almost square so about 145mm long.

dave
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Old 9th April 2012, 12:06 AM   #839
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Quote:
Originally Posted by dpastern View Post
Well, I'm new to these forums (have been a member a while, but have never posted).

PS Anyone in Brisbane, Australia that has one of these horns in their system that I could listen to for a bit with some of my music?
Hi there
I have a 3/4-finished pair of FH3's.
I'm in Kenmore Hills. Where are you?

Doug
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Old 9th April 2012, 02:44 AM   #840
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Thanks for the nice words guys. Dave, have you had a chance to listen to the W-4's installed in the FH Mk3? Really curious to hear your impression of them.
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