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The Sound of the BK-12m
The Sound of the BK-12m
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Old 6th September 2018, 10:00 PM   #1
Karl71 is offline Karl71  United States
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Default The Sound of the BK-12m

I’m quite interested in the BK-12m. I’ve experimented with Fostex FF85K, Bandor 50, and ScanSpeak 5F drivers, all sealed & the second two paired with a powered sub. Warts & all, I love single drivers.

I want to try something different, and a BLH is a creature unknown to me. It’s dubious to describe a sound, but I must have some description or comparison before I plunk down the price of the full kit. I would intend to try other drivers in addition to FE126EN & FE108E Sigma, so I need some help.

Bring all of your experiences & biases here.

Last edited by Karl71; 6th September 2018 at 10:36 PM. Reason: Additional information added, for clarity.
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Old 7th September 2018, 10:43 PM   #2
CaptainSniffy is offline CaptainSniffy  United States
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There is already a thread on the BK-12m speakers that has a lot of good information and opinions.

I am really happy with these speakers, and still keep them in my main set-up to use for certain kinds of music. The horn delivers a surprising amount of bass volume, but without the air-pushing impact of a big woofer.

For the money, they are really outstanding, and you'll get a lot of pride from DIY, especially if this is your first effort, as it was mine.
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Old 7th September 2018, 10:53 PM   #3
Karl71 is offline Karl71  United States
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Thanks, Cap.

I’m very familiar with the threads. They’re pretty long, and I wanted the kind of answer you provided. I appreciate it!

What do they NOT do well?

Last edited by Karl71; 7th September 2018 at 11:22 PM. Reason: Question added.
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Old 8th September 2018, 12:45 AM   #4
CaptainSniffy is offline CaptainSniffy  United States
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If I had the room, and a source for a flatpack, I would have gone with the Frugelhorn instead, because the BK-12m, lacking in low-end, is less satisfying for certain kinds of music. However, the BK-12m has a front facing horn, which makes them a lot more versatile with placement.

Other cons? I've heard that the default driver is a bit shrill in this enclosure. There are many alternatives though, and the drivers I have are real gems, though unfortunately discontinued.

Sorry, really scratching my head to think of other cons. These were a real joy to build and listen to.
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Old 8th September 2018, 01:01 AM   #5
Karl71 is offline Karl71  United States
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I am not a “bass-head” in terms of wanting that “thumpa-thumpa” effect. It’s a very controlled bass sound I want.

I would probably skip the FE126En & try the FE108E Sigma. I would begin using different drivers after that, such as a pair of the 4” Dynavox full range drivers I just snagged that were 50%-off recently at Parts Express. I’ve identified a number of 4” Tang-Band drivers that look quite interesting. There’s also the Fostex FW108-HS, while not perhaps truly full range, it might do well with a helper-tweeter. Dimensionally they all would fit. I would use adaptor plates.

Last edited by Karl71; 8th September 2018 at 01:03 AM. Reason: Copy-edits
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Old 10th September 2018, 05:23 PM   #6
CaptainSniffy is offline CaptainSniffy  United States
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Using adaptor plates is an excellent idea. It's very popular with the frugelhorn crowd. I wish I had thought of that when doing my build.

In any case, I'm happy with the drivers I've chosen, but still, it would be fun to be able to audition different drivers in this enclosure.
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Old 10th September 2018, 10:44 PM   #7
planet10 is offline planet10  Canada
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The Sound of the BK-12m
The Frugel-Horn Mk3 is more versataile as to drivers, the BK12m specifically designed for the FE126En. So if your goal is to compare drivers, then the FH3 would be a base for closer compatibiity.

dave
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Old 10th September 2018, 10:54 PM   #8
Karl71 is offline Karl71  United States
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Dave -

That’s what I suspected.

It’s a moot point, now, because I just bought a pair of NIB Lowther DX55 drivers! It was a target of opportunity. (I should have them in a week.) I’ve wanted A PAIR for 20 years, not really set on which units in particular. I am well aware of their warts. The price was far too good to pass-up. Like all of us here, I’m an experimenter.

Finding a cabinet design is proving to be difficult. David Dicks says on his website that Lowthers can be popped into BRs with no problem. I’m not so sure. I just emailed Lowther on the subject, but haven’t heard back.

How would I contact you for professional design work? I tried contacting you about a WAW idea somewhat recently, but I never received a reply.

Regards,

Karl
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Old 10th September 2018, 11:13 PM   #9
planet10 is offline planet10  Canada
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Quote:
David Dicks says…
What he says is not worth listening to.

He got kicked off this forum for vehemently, and nastily, trying to defend his undefensible position on "one box" for all.

The DX55 is a hard nut to crack. Models OKish in FHXL if you have a high output impedance amplifier.

dave
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Old 11th September 2018, 01:44 AM   #10
Karl71 is offline Karl71  United States
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Lowthers were the first drivers I encountered as a name when I started reading online about audio in 1998. I think I saw them in Sound Practices magazine. I got interested in audio when the SET - fullrange driver nexus existed & there were schematics for 2A3, 45, and 300B amps everywhere. I couldn’t afford any of that at the time since I was a poor post-graduate student.

I am very fortunate to have found them, and they should arrive next Monday. I’ve been aware of their weirdness for some time, and I’m looking forward to trying different ideas to get the sound I want. I expect to use them for small ensemble & solo-instrument Jazz & classical music. I don’t see a lot of Sabbath being played through them.
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