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Double Bass Arnopol 8 Cabinet - A Winner!

#141
drurb said:
Here's what it would look like. You would have an 8-ohm load (Crazy 8) in parallel with a 16-ohm load (Crazy 88 with drivers wired in series). With a voltage applied to that circuit, half the current would flow through the 16-ohm Crazy 88 than would flow through the 8-ohm Crazy 8. Correspondingly, half the power would be developed across the Crazy 88 than would be developed across the Crazy 8.

So, assuming linearity and equal sensitivity of the two cabs, the acoustic output of the Crazy 88 would be 3-dB down compared to that of the Crazy 8.

Now, let's look at each driver within the Crazy 88. Because it would be wired in series and because each driver has the same impedance, then the current flowing through each driver would be the same with each driver contributing equal shares of the "half-power" through the box. That is, the power developed across each driver in the Crazy 88 would be 1/4 of that developed across the Crazy 8.

Here are the calculations. Let's assume a 1-volt input to the circuit. We'll also assume that Ohms law (V=IR) applies and we'll eschew the reactive AC components.

What is the current across the Crazy 8?
It is 1/8, or 0.125 amps (I=V/R).
What is the power developed across the Crazy 8?
It is 0.125 watts (I2​R or V2​/R).
What is the current across the Crazy 88?
It is 1/16 or 0.0625 amps.
What is the power developed across the Crazy 88?
It is 0.0625 watts.
What is the power developed across each driver in the Crazy 88?
It is 0.0625 2​*8=0.03125 watts (I2​R).
So, you see, the power developed across each driver in the Crazy 88 is 1/4 of that developed by the single driver in the Crazy 8.
Click to expand...

Thank you for teaching me how to fish instead of handing me a tin of canned fish, Drurb; that's exactly what I was looking for! :)
 
#143
Using more than one speaker, there might be interference if the distance from each speaker to the listener is not the same (phase cancellation due to runtime difference).
If the speakers are close to the player but on the floor this might be the case.

But if the low basses drop, it is rather a problem of a speaker connection with wrong phase.
 
#144
DoubleMIDI said:
Using more than one speaker, there might be interference if the distance from each speaker to the listener is not the same (phase cancellation due to runtime difference).
If the speakers are close to the player but on the floor this might be the case.

But if the low basses drop, it is rather a problem of a speaker connection with wrong phase.
Click to expand...

True, but keep in mind that we're not talking about high frequencies and that we're considering reverberant environments. The typical direct-to-reverberant energy ratio will tend to lessen any such ill effects. Finally, as I've discussed before, if multiple cabinets are used to increase horizontal coverage by facing them in different directions, then such worries evaporate.
 
#145
I should have a Crazy88 to keep my Crazy8 company in about 4 weeks; Crazy8 will be pole-mounted above Crazy88. :D

I'd like to obtain two padded duffle bags; one to hold Crazy8, miniature bass head, miniature pedal board, and cables; the other would hold the Crazy88 and a 35mm pole.

Whats a good source for such a bag?

If I can find something readymade, that'd be great. if not, who are some good custom bag & case makers?

Thanks! :)
 
#148
I use softsided wheeled suitcases
My last one was used and only $10
Put your gear in the car trunk , drop by a second hand shop and try out a bunch of bags

thanks

Robert

Jazzdogg said:
I should have a Crazy88 to keep my Crazy8 company in about 4 weeks; Crazy8 will be pole-mounted above Crazy88. :D

I'd like to obtain two padded duffle bags; one to hold Crazy8, miniature bass head, miniature pedal board, and cables; the other would hold the Crazy88 and a 35mm pole.

Whats a good source for such a bag?

If I can find something readymade, that'd be great. if not, who are some good custom bag & case makers?

Thanks! :)
Click to expand...
 
#149
Jazzdogg said:
I should have a Crazy88 to keep my Crazy8 company in about 4 weeks; Crazy8 will be pole-mounted above Crazy88. :D

I'd like to obtain two padded duffle bags; one to hold Crazy8, miniature bass head, miniature pedal board, and cables; the other would hold the Crazy88 and a 35mm pole.

Whats a good source for such a bag?

If I can find something readymade, that'd be great. if not, who are some good custom bag & case makers?

Thanks! :)
Click to expand...

For years, I've been a using a Meinl Deluxe Cajon bag that I bought from Musicians Friend ([Invalid or Expired Link Removed]) which just exactly fits my EA Wizzy 10 with an AI Focus in its padded bag on the end.

The Wizzy 10 is larger than the Crazy8 but not by much, and I imagine this would work well for you. I'm seriously considering one of the Crazy 8 speakers as well, and would plan on carrying it with an amp on my shoulder in this bag. The extra 2 inches inside (due to the C8 being 2" shorter than the W10) would be great because I could fit one of those reel type extension cords in the bag as well. The bag has worn very well, and the faux sheepskin lining provides a lot of padding.

Erik Hansen aka Lownote
Scotland
 
#151
LowNote said:
For years, I've been a using a Meinl Deluxe Cajon bag that I bought from Musicians Friend ([Invalid or Expired Link Removed]) which just exactly fits my EA Wizzy 10 with an AI Focus in its padded bag on the end.

The Wizzy 10 is larger than the Crazy8 but not by much, and I imagine this would work well for you. I'm seriously considering one of the Crazy 8 speakers as well, and would plan on carrying it with an amp on my shoulder in this bag. The extra 2 inches inside (due to the C8 being 2" shorter than the W10) would be great because I could fit one of those reel type extension cords in the bag as well. The bag has worn very well, and the faux sheepskin lining provides a lot of padding.

Erik Hansen aka Lownote
Scotland
Click to expand...

I do the exact same thing w/ this less expensive cajon bag from Road Runner. [Invalid or Expired Link Removed]

Got it even cheaper at Guitar Center and it has been great or my AI Focus and Wizzy 10 (without the sheepskin but well padded).

Bri
 
#154
I got a Crazy 8 today without tweeter and spent a few minutes comparing it to my reference Acme B1. Much has already been said about how tiny and light this thing is but it doesn't sound lightweight at all. The sound if full, warm and clear. It doesn't have the low end extension or punch of the B1 but that's not surprising because really, nothing does. The Crazy 8 is less than 1/3 the weight and sounds really good.

I took it to an outdoor gig at a Country Club, piano, flute and me. The schlep factor is much appreciated! I've always got a bass buggy strapped to the bass and I had the Clarus in the shoulder bag. All set, grabbed the Crazy 8, unconsciously set it on the bass while I closed and locked the car and began wheeling across the parking lot. So how did it sound on the gig? Beautiful. Granted, we weren't loud but it was outside. I had the EQ set flat and the sound was as good as I've ever had. The other guys commented on how natural my sound was. The flute player (flautist??) noticed how much the cone was moving but it never sounded stressed a bit.

Going back to the Acme B1 comparison, the Crazy 8 sounds more open to me. The Acme always sounds a bit compressed, if you will. Mike's box just sounds more natural.
It's amazing to have something that sounds this good in a schlep friendly package. :hyper:
 
#155
Greg Clinkingbeard said:
I got a Crazy 8 today without tweeter and spent a few minutes comparing it to my reference Acme B1. Much has already been said about how tiny and light this thing is but it doesn't sound lightweight at all. The sound if full, warm and clear. It doesn't have the low end extension or punch of the B1 but that's not surprising because really, nothing does. The Crazy 8 is less than 1/3 the weight and sounds really good.

I took it to an outdoor gig at a Country Club, piano, flute and me. The schlep factor is much appreciated! I've always got a bass buggy strapped to the bass and I had the Clarus in the shoulder bag. All set, grabbed the Crazy 8, unconsciously set it on the bass while I closed and locked the car and began wheeling across the parking lot. So how did it sound on the gig? Beautiful. Granted, we weren't loud but it was outside. I had the EQ set flat and the sound was as good as I've ever had. The other guys commented on how natural my sound was. The flute player (flautist??) noticed how much the cone was moving but it never sounded stressed a bit.

Going back to the Acme B1 comparison, the Crazy 8 sounds more open to me. The Acme always sounds a bit compressed, if you will. Mike's box just sounds more natural.
It's amazing to have something that sounds this good in a schlep friendly package. :hyper:
Click to expand...

Nice, isn't it?

Out of curiosity, did you leave it on the floor, or put it up on a chair?
 
#158
Greg Clinkingbeard said:
I had it on the patio up on its tilt legs. In retrospect I should have engaged the HPF to reduce the cone movement but I didn't think about it.
Click to expand...

Is cone movement a bad thing for this little speaker? When I talked with Mike a few months ago I remember getting the impression that one of the cool things about the speaker in the Crazy 8 was how MUCH the cone moved. Confused...
 
#159
The cone moves so much more than lesser drivers that it can be a little unsettling to watch if you aren't aware of its capabilities. :)

I'm very happy with the sound of my Crazy8 with the HPF engaged; I start with it disengaged, and turn the dial until it sounds good. A variable HPF is also great for taming boomy rooms without removing testicular fortitude from your sound.

As an added bonus, cutting the lowest frequencies makes the most of available amplifier power. :D
 
#160
It is. (a cool thing) This little puppy has a maximum excursion of over 8mm which is insane. The Eminence 15" 3015lf (as used in the Fearfuls) is 9mm. That's almost a feat of magic in driver design. That's why I can say that it competes with most 10's----with the exception of the Acme, none have excursions over 5mm.

So---watching the cone is not for the squeamish! It's meant to move REALLY far. The only problem with the 8 is the temptation to push it too far. Good news was that I pushed one until the voice coil was smacking the back plate. No damage done at all. So---the good news is that it will be very obvious when the speaker hits its limit--which is pretty impressive how far that limit is-- you'll know it and won't damage it. I tried to fry one to find its limits but got stupid loud before I ran out of guts!
With Francis' version 3 you can get sooooo much more usable volume out of it.
 

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