Sensitive Wide Range OB - Update - Tonemaster

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#41
dmason said:

I have ordered a pair of the Lil' Buddies, a pair of the Tone Tubby Alnico 10, and a pair of Tone Tubby SuperBoy 15 bass drivers, and have no idea as to what I could expect from the latter, as they still have no published specs on these, against my better judgment, however, I believe a 15 inch Tone Tubby bass monster can't but be a good thing. .
Click to expand...

You are missing a driver for your inclusion:

The Weber 15A200. ..under the "vintage series":

https://taweber.powweb.com/weber/
 
#43
hey magnetar. I've really got the fever after studying your design here. Thinking of trying the Lil Buddy and B&C CD. I don't have any parts lying around and wonder if you have an opinion on this- PE has an 8" waveguide that's threaded. B&C has a hyperbolic Cosine ABS horn made for this driver. My room is on the smallish side and I am leaning toward the waveguide. But it would mean using a threaded to bolt on adapter. You think either is superior?

Thanks, Jon
 
#44
bonjonno said:
hey magnetar. I've really got the fever after studying your design here. Thinking of trying the Lil Buddy and B&C CD. I don't have any parts lying around and wonder if you have an opinion on this- PE has an 8" waveguide that's threaded. B&C has a hyperbolic Cosine ABS horn made for this driver. My room is on the smallish side and I am leaning toward the waveguide. But it would mean using a threaded to bolt on adapter. You think either is superior?

Thanks, Jon
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Hello

I'd go with the B&C, the 8" parts express waveguide's throat is a bit of a mess. The little B&C horn is made for the driver!

You will need bass drivers if you don't put the Lil Buddy in a box.
 
#46
Great- thanks for the recommendation.

I have a couple of subs I've been using for years, ported in a box. Have been fooling with some old scan speak drivers on OB panel that I used to have in a sealed box. Not bad but I'm also not wetting my pants with glee. Thinking of putting the 8545's back in the boxes and using them and the 10" vented subs for under 350. I can only afford a bit at a time and think I can swing the top end for now. BTW, I'll have to use a pasive xo on the LB and horn for now. The subs have a different amp with volume control for tweaking balance a little.
 
#49
Hi Magnetar,

It's been a while since last update. :smash:

My system will be changed in the near future and I appreciate your experiences a lot.

2 questions:

1. How about running the mid "naked"? I mean, no baffle at all, just suspend or support it on its back.

By some simple simulations by <the Edge>, 10"er can do 400~500Hz. (12"er can do 300~400Hz) Have you tried this? Is this low enough for you?


2. How do you remove the dust cap? Knife? Heat gun? or something else?

Thanks & Regards,
CLS🙂
 
#50
CLS said:
Hi Magnetar,

It's been a while since last update. :smash:

My system will be changed in the near future and I appreciate your experiences a lot.

2 questions:

1. How about running the mid "naked"? I mean, no baffle at all, just suspend or support it on its back.

By some simple simulations by <the Edge>, 10"er can do 400~500Hz. (12"er can do 300~400Hz) Have you tried this? Is this low enough for you?


2. How do you remove the dust cap? Knife? Heat gun? or something else?

Thanks & Regards,
CLS🙂
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Yes I've used no baffle on mids. It limits the range of the driver too much when done to a midrange. I prefer a baffle that will alt least load (not cancel)to 300 hz and one with no wings for midrange drivers (200 to 2K)

An exacto knife
 
#51
Alternate woofer

Magnetar,

Thanks for a very inspiring OB design.

For those of us not having access to the Madison woofer (I've noticed you used both the 16'' and 21'' Executioners) any suggestion for alternate woofers (*ahem* european manuf. would be great).

I'm currently looking at the Beyma SM-118N 18''er (single per side, HP around 200Hz -- give or take -- or run by a plate amp). Alternative suggestions/experiences welcome.

Thanks again for an inspiring design,

Best regards,

Florian
 
#52
Re: Alternate woofer

FlorianO said:
Magnetar,

Thanks for a very inspiring OB design.

For those of us not having access to the Madison woofer (I've noticed you used both the 16'' and 21'' Executioners) any suggestion for alternate woofers (*ahem* european manuf. would be great).

I'm currently looking at the Beyma SM-118N 18''er (single per side, HP around 200Hz -- give or take -- or run by a plate amp). Alternative suggestions/experiences welcome.

Thanks again for an inspiring design,

Best regards,

Florian
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My open baffle speakers now use two 21" woofers in a 'z frame' for bass 30 to 150 cycles. When it's all done maybe I'll post details. It requires a little eq but is measuring better than anything I have built (in that frequency range) in my room. Low distortion, linear, powerful, dynamic and 'fast'

Thanks
 
#54
I cut the dust cap of the guitar driver on hand -- Eminence Legned 125:

IMG_3168.jpg

It's hard for me to cut any closer. A ring of glue is still there🙁


This is the comparison.
IMG_3165.jpg

And the one on the left had a thin layer of PVA glue applied on the cone.

When the glue was still wet, I "hung" the other one under the frame on top of the main baffle:
IMG_3169.jpg
(oh, uh, one of the woofer is gone, and the hole is roughly blocked by a close-cell foam pad... )

Without supports by baffle, this 12"er can only do about 300hz. In this system, before I make any changes to the xover, there's a big hole in the 200~250hz region. And there's a nasty peak around 2.5kHz. So the sound was unpleasantly thin and colored.

I got no time for the xover mods, so the problems were roughly fixed by some fast tweaks on digital EQ. After EQ'ed, it's not that unbearable. Of course it's only an experiment for the time being, and can only play at low SPL.

This is the overall look with the other channel.
IMG_3172.jpg


Hopefully the one without dust cap will sing more beautifully.....
 
#57
Re: Re: Alternate woofer

Magnetar said:


My open baffle speakers now use two 21" woofers in a 'z frame' for bass 30 to 150 cycles. When it's all done maybe I'll post details. It requires a little eq but is measuring better than anything I have built (in that frequency range) in my room. Low distortion, linear, powerful, dynamic and 'fast'

Thanks
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Magnetar,

Any update on this ?
 
#58
I was inspired by one of magnetar's recent builds and have been listening to this system for a coupla months. It uses the Lil Buddy hemp 10" and a B&C DE10 and matching horn mounted on half a scrap board I bought at menard's for $1.19. The bass is coming out of a coupla different cabs I built 10-15 years ago. In the corner is a ported 2.8 cf box with a 10" madisound woofer. Under the OB is a 15 ltr sealed box with scan speak drivers, but I'm only using the woofer now, an 8545. The woofers are xo with an old behringer 2-way at ~350hz and driven with an old onky integra integrated amp. The OB portion is coming out of the high part of th xo and driven by a Threshold Stasis3. My source is flac files into a DIY Paradise Monica usb dac and from there into a modded acurus LS12 preamp. In the computer I'm using slight eq (+2db at 36, -6.5db at 2900, each about 2/3 octave) adjustment to smooth out the annoying mid hump. It all sounds good to me. I'm still scared to cut the dust caps and don't know where I'd get a cone if I did.

An externally hosted image should be here but it was not working when we last tested it.
 
#59
bonjonno said:
I was inspired by one of magnetar's recent builds and have been listening to this system for a coupla months. It uses the Lil Buddy hemp 10" and a B&C DE10 and matching horn mounted on half a scrap board I bought at menard's for $1.19.
Click to expand...

How do you describe the sound from Lil Buddy? Is it more suitable to certain type of music, eg Jazz, Blues, what about vocal music?

a quick summary is welcome.
 
#60
It's hard to put into words. Depends more on the quality of the recording I'd say. Guitars (!) and horns are sometimes astounding. Some vocals are better than others. If you have a good recording there's a high WOW factor. Herbie Hancock's River album for instance, everything blows my mind. And other times it's not as satisfying. I guess it's kind of a transparent sound, not sugar coated. I listened to the ss 8545 for 10 years because I loved it's mids and lower mids. This system is different but I haven't felt the need to go back at all yet.
 
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