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Old 30th September 2005, 03:46 AM   #11
Jorge is offline Jorge  Brazil
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Default Update

We will start with the 15" Snake in a ported box cube.
Gross internal volume 135 litres for a net of some 120~125 lts.

By the specs it shall have a 40Hz F3, and reach max excursion (9.5mm) at 30Hz when driven by 200W.
Expected SPL is 118 dB at 1m.
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Old 30th September 2005, 04:08 AM   #12
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I'll buy adding a ten incher to the big LF driver to pick up pickin', slappin' and fret sounds but for what reason does one feel that an actual tweeter is necessary in bass guitar reproduction? Forgive me if this is a dumb question as I am not a musician, nor have I ever played one on TV.

I have an unused quad of NIB Selenium 10PW3's looking for a project.

Rob
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Old 30th September 2005, 11:07 AM   #13
Jorge is offline Jorge  Brazil
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Hello, Rob

The decision (still pending) of using a tweeter was based in this article:

http://www.core-sound.com/bottom-article.html

I've spoken to the owner of a musical instruments store, and he said all the bass boxes he sold that had a tweeter also had a switch/level pot so one could turn the tweeter on/off at will.
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Old 30th September 2005, 04:03 PM   #14
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Jorge,

Interesting article. Thanx.

Rob
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Old 2nd October 2005, 05:00 PM   #15
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A lot depends on the sound you want, and probably on your style of music?, some people swear by tweeters, others hate them, it's very much a personal choice. As already suggested, it's common practice to have tweeters (where fitted) switchable, so you have both options.

I bought my bass playing daughter a Behringer BX1200 combo, which is a really nice little amp - it has a single 12 inch speaker, and NO tweeter - it sounds great with a bass guitar through it. However, it's got a pair of phono socket inputs on the back where you can plug a CD player in, to play along to - as there's no tweeter it sounds really dull - this would be a good case for a switchable tweeter?.
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Old 3rd October 2005, 12:10 PM   #16
Geenius is offline Geenius  Netherlands
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Hello Jorge,

I play both bass-guitar and double-bass, and over the past 25 years have played over many systems. Here is some of my experience:

For a true "full-range" sound I like a 15" bass driver and one or two smaller drivers to give better midrange articulation. I find a tweeter a "must have" as it gives the harmonics a much clearer presentation, if the amplifier has a good graphic equalizer then the tweeter level can be adjusted to taste using the eq.
The multipe 10" cabinets are preferred for percussive slap playing because the have more punch than a single 15" but they do lack bass weight.
The amount and size of drivers also depends how the speaker will be used, for small club playing you will need less cone area than when playing on a large stage.

My current single box set-up uses a 12" woofer + 2x 7" midwoofers + a tweeter. The 7" run fullrange, the 12" has a 1st order low-pass at about 300Hz and the tweeter has a 3rd order highpass at about 5kHz. I use a Trace-Elliot amp with 12-band eq but only use the eq for adjusting the system to the acoustic of the room I play in, basically the box itsself has hi-fi qualities. I used a 12" woofer only because of portability issues, otherwise I would have used a 15" woofer.
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Old 3rd October 2005, 12:45 PM   #17
Geenius is offline Geenius  Netherlands
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Here 's a photo:

Click the image to open in full size.
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Old 3rd October 2005, 03:17 PM   #18
Jorge is offline Jorge  Brazil
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Hello, Tony

Thanks a lot for your help.

The most professional activity of my son is in a dance club/bar playing caribean music in an 8 persons combo for an audience of some 400 people.
Most of the players in this combo make a living out of music.

Isn't there an HP filter for the 7" speakers in yor system?
That's something I find unusual in these bass systems - the midrange will quite likelly be stressed by bass!
This is the reason I'm considering a biampli + line level Xo. This way, a 10" speaker is good enough up to 120 dB at 1m...

Take care,
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Old 4th October 2005, 07:32 AM   #19
Geenius is offline Geenius  Netherlands
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For such a venue I would advise a 15" bass cabinet with a seperate 4x 10" woofers + tweeter cabinet. This should have enough powerhandling and is also flexible that for smaller gigs the 4x 10" cabinet will work on its own. The 15" will give "body" to the bass, the four 10" woofers (so not only midrange) will provide articulation and speed. Something like this:

Click the image to open in full size.

The 7" woofers in my system are rugged pro-woofers without any filter. I mostly play in small jazz clubs with a maximum of about 100 people so my system doesn't need to play very loud.
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Old 4th October 2005, 10:48 AM   #20
Jorge is offline Jorge  Brazil
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Thanks again, Tony.

I will show him this post.
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