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Old 18th December 2014, 12:08 AM   #21
needtubes is offline needtubes  United States
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What is the Stinger? I don't recall seeing that name in recent times...
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Old 18th December 2014, 12:27 AM   #22
planet10 is offline planet10  Canada
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My Pensil 6 build.
Stinger is the Baby Lab for the A6.2p/m. Unreleased as of yet. 1 beta build + the one Chris did.

We are working on a release of a set of Baby Labs for FF85wk/FF105wk, Alpair 6.2, CHN70, Aura NS3

dave
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Old 18th December 2014, 01:46 AM   #23
chrisb is offline chrisb  Canada
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"Baby Lab" is short form for Scott's series of compact Onley inspired folded labyrinth. As Dave mentioned, over the past year or so we've experimented and refined details using this format for at least 5 models by Fostex, MarkAudio, Fountek, and Aura - I've built all but the Aura

Drawings not quite ready for release.

When I say compact, a single 4x8 sheet would yield at least 3 pr, including all the internal panels
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Old 18th December 2014, 09:17 AM   #24
MartinHyde is offline MartinHyde  United Kingdom
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Thanks for the replies.

Looks like I chose the wrong design - should have checked here before committing myself

From further listening, it's clear that I'm not going to get the required bass from this combination.

Adding in my passive woofers and active sub really transforms the sound into something approaching very nice.

The Pensils are pretty huge in the context of my room, so it's a shame that the size doesn't add anything useful except put the drivers at the correct height.

IMAG0792.jpg

So, my thinking is to either:

1. Use the drivers in a new mini enclosure that can sit on my existing stands.

or

2. modify the pensils to make a smaller enclosure within the pensil enclosure (sealed or BR or other) with internal bulkheads - perhaps I can then add some passive woofers into the bottom half of the enclosure?

What do you think?

Cheers,

Martin
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Old 18th December 2014, 11:27 AM   #25
northernsky is offline northernsky  Italy
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Quote:
Originally Posted by MartinHyde View Post
Thanks for the replies.

From further listening, it's clear that I'm not going to get the required bass from this combination.
Hi,

if you are using brand new drivers I would suggest to wait some time for a final decision and let the drivers break in.

I just built a couple of weeks ago a pair of microMarken6 with alpair 6.2m;
it is a very small cabinet (3liters) and I was completelly disappointed by the bass extension. Day by day, I am getting more and more satisfied: yesterday evening I realized, by using a tone generator, that the small boxes return clearly earable sound at 50hz (obviously not flat but there).
Ok, they are not the right speakers for listening to the London Symphony Orchestra or Gun's Roses, but in a medium-small room and small ensemble music I see no need for extra bass.


northernsky
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Old 18th December 2014, 05:25 PM   #26
chrisb is offline chrisb  Canada
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Martin: to echo northernsky (and my own earlier note), you can expect some overall improvement after the rather lengthy break-in, but it won't be a life changing experience.

Due to the limited floorspace seen in your photo for additional woofer enclosures, and the time/materials invested in the Pensils, if you still find them lacking after break-in, I'd be inclined to modify them, and add small woofers to turn them into a 2-way system. I personally like XO below the telephone band, but that tends to make component values for passive filters rather large, and costly if using films, etc. First candidate driver I can think of would be one of the 6" SilverFlutes or locally available equivalent, mounted on side panel.

Before that, though - would there be an opportunity to test these enclosures in an entirely different system - say a friend / relative's? It's always nice to isolate a problem / confirm the diagnosis before attempting a cure.
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Old 18th December 2014, 10:03 PM   #27
MartinHyde is offline MartinHyde  United Kingdom
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Hi Chris and Northernsky,

Thanks for your input. I'm going to run them in over the xmas period in the spare room - 18 hours a day for 2 weeks should loosen them up a bit! After that, i'll spend time playing with the stuffing, sources and amplifiers.

I do have another amp to hand - a 1980s Cambridge audio unit with plenty of power and a lovely silky smooth, weighty balance. And then I've also got my HT setup downstairs to try.

@northernsky, the Pensils have almost the same width and depth dimensions as your microMarkens. Would just need to saw ~600mm off the bottom and form the port et voila! What sort of amplification are you using with yours?

Cheers,

Martin
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Old 19th December 2014, 10:23 AM   #28
MartinHyde is offline MartinHyde  United Kingdom
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Hi Chris,

Just a couple of questions re your last post.

What is the telephone band? And why mount the additional driver into the side, as opposed to the front?

Cheers,

Martin
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Old 19th December 2014, 05:58 PM   #29
planet10 is offline planet10  Canada
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My Pensil 6 build.
Quote:
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What is the telephone band? And why mount the additional driver into the side, as opposed to the front?
300-3k.

No reason the driver can't be front mounted. The side does allow a larger driver.

First thing needed is to figure out the volume remaining once the box is divided into 2. Likely the easiest way to do that is to mount a PVC or cardboard cyclinder behind the A6.

dave
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Old 20th December 2014, 10:41 AM   #30
northernsky is offline northernsky  Italy
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Quote:
Originally Posted by MartinHyde View Post
Hi Chris and Northernsky,

What sort of amplification are you using with yours?

Cheers,

Martin
They are a Christmas gift, I am currently testing them with a 12 Watt valve amplifier (M84 by Yarland).

northernsky
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