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Woofer for tiny closed box.
Woofer for tiny closed box.
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Old 18th June 2014, 08:49 PM   #1
midrange is offline midrange  United Kingdom
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Woofer for tiny closed box.
Default Woofer for tiny closed box.

In the 1970's there were a number of really small closed box speakers; Goodman's Maxim, Realistic Minimus 7, Technics SB F1 spring to mind. I would like to have a go at making something similar.

Any suggestions for a woofer (4"?) for a 2-4 litre closed box?
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Old 18th June 2014, 10:35 PM   #2
theyoungone is offline theyoungone  United Kingdom
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I am currently doing a very similar project and the best woofer I have found so far is the Monacor SPH100C. It seems to work nicely in a 2.8l enclosure tuned to around 85hz
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Old 19th June 2014, 02:14 AM   #3
Inductor is offline Inductor  Portugal
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Hi midrange,
your driver:
Seas E0037-08S W15CH001 pdf
Seas W15CH001 - E0037
Seas W15CH001 E0037-08 - Excel Midwoofer
E0037-08S - Seas Excel W15CH001 5.5” woofer - Europe Audio
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Old 19th June 2014, 08:04 AM   #4
Moondog55 is offline Moondog55  Australia
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Not what I would call a "Tiny" box tho
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Old 19th June 2014, 08:22 AM   #5
system7 is offline system7  United Kingdom
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For some reason, probably ease of filtering, these 4" sort of speakers often used 4 ohm woofers. So this one fits the bill for 4L: SB Acoustics SB12NRXF25-4 MidWoofer

But I would give serious consideration to this polycone for 2L or more too which might work on a simpler filter: Peerless 830870 HDS 106 PPB MidWoofer Speaker

These are both closed box drivers. This one is more reflex oriented: SB Acoustics :: 4? SB12NRX25-4

The Visaton Aria Light is an interesting small reflex design too. Easily enough available driver units.
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Last edited by system7; 19th June 2014 at 08:28 AM.
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Old 19th June 2014, 11:42 AM   #6
midrange is offline midrange  United Kingdom
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Woofer for tiny closed box.
Thank you for your suggestions. The Monacor SPH 100C and the SB 12 fit the bill very well. I agree with Moondog, but when I put "small" in the thread title, I saw an old thread that talked about small boxes of 30-40 litres and 10" drivers.
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Old 19th June 2014, 01:15 PM   #7
LFM is offline LFM  Canada
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Default small speaker

I have a pair of Minimus 7's and had to replace the woofers. I found good quality cheap replacements from MCM Electronics . I don't recall the model number. Worth a look.
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Old 19th June 2014, 02:48 PM   #8
jReave is offline jReave  Canada
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It might help to know what F3 you are looking for and what kind of SPL's you want at those frequencies. Also, do you intend to use a sub with them or will they be handling all the LF's?
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Old 19th June 2014, 03:30 PM   #9
system7 is offline system7  United Kingdom
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I don't think anyone is expecting much bass from a 4L closed box. I hate to mention the "C" word here, but I've got to. CONE Tweeters were what made the Goodmans Maxim and Videoton good!

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It's quite easy to import the Boxsim Projektdatenbank Aria Light into the projekte folder of Boxsim. The 8 ohm W 100 S - 8 Ohm works pretty well as a flattish 3.9L closed box or as a slightly boomy reflex.

Some change does the Visaton filter good though, IMO.

This looks quite reasonable with the TW 70 - 8 Ohm cone tweeter. I quite like that.
Attached Images
File Type: png Aria Light TW70 Cone Tweeter.PNG (4.8 KB, 234 views)
File Type: png Aria Light TW70 Tweeter.PNG (19.8 KB, 236 views)
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Old 19th June 2014, 03:52 PM   #10
system7 is offline system7  United Kingdom
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Oh, just as a bit of fun. Here's a 2 litre reflex Pure DMX-25 speaker I have which was part of a budget music centre. It's incredibly simple, just a coil on the woofer and a cap on the cone tweeter.

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Really quite respectable sound in the budget bracket. It's got great midrange.
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