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Old 17th July 2009, 11:42 PM   #11
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My point was that headroom is everything as far as bass goes. Of course, I don't use all that power and the tone is is wonderful, very deep and clean. Since I'm a hi fi enthusiast, I value my hearing!
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Old 18th July 2009, 04:07 PM   #12
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Quote:
Originally posted by vinylguy
My point was that headroom is everything as far as bass goes. Of course, I don't use all that power and the tone is is wonderful, very deep and clean. Since I'm a hi fi enthusiast, I value my hearing!
"WHAT???"

I wish I had taken better care of my hearing when I was younger. I know how to wire up a PA, but I can't do the sound check because of a huge dip at 4 kHz.

But still you claim that 400W isn't enough.
I have been playing bass for 25 years and past the first two years or so (it had to be loud at that time ) I have never had to crank an amp.
And that is:
Some old VOX 100W SS guitar amp
Marshall 100W tube
MusicMan 130W tube
Behringer 450W SS
Always on 8 ohm cabs.

I now have a GK 1001RB-II and it has way more power than I'll ever ask for, even at 8 ohm.
When I measure the output voltage at moderate playing level, it rarely exceed 20 volts average. That is only 50W into my 8 ohm SVT410HE.
Lets assume the peaks go as high as 25-30 volts, that's still only 110W.
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Old 21st July 2009, 01:09 AM   #13
tinitus is offline tinitus  Europe
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For years I have wanted to build a nice bass rig

I feel now is the time

The popular 5-string basses obviously needs good lowend
Its mainly for home use and quality sound rather than highest SPL

This 12" hifi sub driver in a bandpass
http://www.hoejttalerbutikken.dk/pro...sp?product=683

For midbass/midrange maybe 12" Eminence Deltalite?
Tweeter?
Top, Ashdown Little Giant 350W?
Fame(German)?
Traben?
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Old 21st July 2009, 03:11 AM   #14
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that looks almost identical to a Peavey "Black Widow" driver...... if it has a replaceable basket/voicecoil/cone assembly then it would be identical......
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Old 21st July 2009, 12:34 PM   #15
tinitus is offline tinitus  Europe
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Quote:
Originally posted by unclejed613

Peavey "Black Widow" driver...... if it has a replaceable basket/voicecoil/cone assembly......

Thanks
Nice to know Im on the right track, maybe

btw, I found a very nice US site yesterday, with many special basses, but also affordable ones
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Old 21st July 2009, 12:58 PM   #16
AndrewT is offline AndrewT  Scotland
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Hi,
20V average is rightly 50W.
But how enthusiastic do you get when really flowing?
+10dB or +12dB or +15dB?

+10dB = 500W
+12dB = 800W
+15dB = 1600W
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Old 21st July 2009, 03:01 PM   #17
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Hi AndrewT.

I know dynamics increases output.
When measuring I used a standard multi meter and I took the max readings. This is higher than average and it is not peak either as the meter integrates the reading in some degree. So I'm certain my peaks are less than 10 dB.
I'm sorry for not being clear.

My point is that you don't need more than a couple of hundred watts on stage. If you do that something should be corrected.
If you can't cut through stage noise, the rest of the band is too loud.
If you need higher SPL to fill the room, what you really need is a PA.
400W into an 8 ohm/100 dB cab is around 125 dB, which is insanely loud on stage.
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Old 21st July 2009, 03:37 PM   #18
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Hi tinitus, are you from Denmark?

I suppose you are going to use a passive crossover with this cabinet.
The cost of the components increases rapidly with lower crossover point.
And a low x-over point is a must with this driver.

But I don't understand why you plan on using a subwoofer with a 2512 as mid driver, the 2512 goes low enough alone and with higher sensivity, 99.9 vs 91 dB.
The dominant tone in the bass does not come from the fundamentals, but from the harmonics, especially the first.
So you really don't need to go lower than 60-70 Hz.

@ unclejed613
What do you mean? The AWM does NOT look like a Black Widow AT ALL. Neither by look or specifications.
http://www.peavey.com/products/brows...0SPS%20BWX.cfm
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Old 21st July 2009, 07:26 PM   #19
tinitus is offline tinitus  Europe
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Quote:
Originally posted by Nordskov


1. Hi tinitus, are you from Denmark?

2. I suppose you are going to use a passive crossover with this cabinet.

3. The cost of the components increases rapidly with lower crossover point.
And a low x-over point is a must with this driver.

4. But I don't understand why you plan on using a subwoofer with a 2512 as mid driver, the 2512 goes low enough alone and with higher sensivity, 99.9 vs 91 dB.

5.The dominant tone in the bass does not come from the fundamentals, but from the harmonics, especially the first.
So you really don't need to go lower than 60-70 Hz.

1. sure am

2, No crossover

3. Sub is bandpass, no xo
Midbass rolls of by itself, in closed
Tweeters? I have 4 small Foster, they would need xo

4. Im not sure about it either
But a 5-string bass is said to do 30hz easily
But sure thats on loose string, which may not matter

5. Sure, I have my doubts about using that 90db 12", and I wouldnt suggest this to others
I suppose you are right about it

Probably much better to use double DeltaliteII-2515
But cost a bit more, but easier to build
Another thing is, I dont believe the response of these 10" woofers
I have never seen a small pro 10" 99db driver having any bass at all
I dont think its possible
Somethings wrong with those specs, or response curves

But nothing decided yet, and I will look at other options
Crazy, it may never leave my house, but I just like those things

edit
Could be that the 2512 you mention is about right, and just around 90db in bass, and more than 100db above 1khz
Might result in clear clean crisp sound
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Old 21st July 2009, 10:30 PM   #20
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1. Good for you in many occasions, but not when comes to prices on electronics and drivers
Where are you in Denmark, I'm in Odense.

2. You should. Power is vasted outside bandpass.

3. What bandpass frequencies are you aiming at?

4. A B-string has a 31 Hz fundamental, but it's hardly noticeable compared to the prominent first harmonic at 62 Hz. That's why most commercial cabs don't go lower than 60-70 Hz.

5.

You are confusing me. The 2515 is 15", a 2512 is 12". Why are you talking about a 10"?

A 10" can go deep, it's a question of cab size and tuning.
Take a look on Acmebass.com. Andy uses the 10" BP102 from Eminence in his designs.

Eminence' data are known to be trustworthy

I use a 2510 in a high tuned cab, it has a very crisp midrange which I love. Though not the same driver, I think the same applies to the 2512.

Don't you play in a band?
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