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(2)8 Speakers=8?

#21
Exxcell said:
I'm building a 2x15 going off some Sunn 2000s plans. I have a friend that has very generously provided me with some D130s (8ohm) and i really would like the cab to be 8ohms so I could build another when I get time. And some more D130/D140s.
Click to expand...

IMHO - I would suggest you wire what you have now of 2 8ohm drivers to 4 ohms

Later, if you ever get around to making another rewire both cabs to 16 ohms, and parallel together for 8 ohms in all.

There would be hardly any difference in acoustic output between
4 x 15 @ 8 ohms
or
4 x 15 @ 4 ohms

Forget the "Watts doubling" confusion. It's not that important.

Also, I wouldn't just try sunn measurements to be optimal for the drivers, make sure you use Winisd to double check the cabinet for the drivers.

Consider adding a couple of 6 or 8" mid-ranges with a crossover is you want Loud. See the fEarful threads.
 
#22
seamonkey said:
IMHO - I would suggest you wire what you have now of 2 8ohm drivers to 4 ohms

Later, if you ever get around to making another rewire both cabs to 16 ohms, and parallel together for 8 ohms in all.

There would be hardly any difference in acoustic output between
4 x 15 @ 8 ohms
or
4 x 15 @ 4 ohms

Forget the "Watts doubling" confusion. It's not that important.

Also, I wouldn't just try sunn measurements to be optimal for the drivers, make sure you use Winisd to double check the cabinet for the drivers.

Consider adding a couple of 6 or 8" mid-ranges with a crossover is you want Loud. See the fEarful threads.
Click to expand...

If I do stick with the D130s, I'll wire in parallel and then make a series box to add impedance of the two cabs to make it 8ohms.
The head I'm using is scraping by with 4ohms.

I plan on saving up and buy a used Sunn/Fender Bassman 300. But that could take a long while.

Check it out!
Link Removed
 
#28
Exxcell said:
I'm building a 2x15 going off some Sunn 2000s plans. I have a friend that has very generously provided me with some D130s (8ohm) and i really would like the cab to be 8ohms so I could build another when I get time. And some more D130/D140s.
Click to expand...
With a Vd of only 65cc the D130 has less output capability than the average modern ten. And, while the 2000S was a very good cab design 35 years ago, today not so much.
 
#29
How strong an amp are you using now? The Delta's won't handle a lot of power in the lows. A pair of 4ohm Legend CA154's wired in series is another option, although, with good speakers and a medium power amp, a single 215 should do all you need to do and it being 4ohms should be OK.
 
#31
Joe Louvar said:
+1. IE, a pair of CB158’s would rock.
Click to expand...

I'd agree for my tastes. The legends are on the warmer side of things, if he wants a brighter grit and grind, may look elsewhere. But basically, yeah, if he just has to have an 8ohm 215, there aren't too many options out there. Could use the Legends, a crossover and a guitar driver for cone breakup in the mids/highs.
 
#32
will33 said:
I'd agree for my tastes. The legends are on the warmer side of things, if he wants a brighter grit and grind, may look elsewhere. But basically, yeah, if he just has to have an 8ohm 215, there aren't too many options out there. Could use the Legends, a crossover and a guitar driver for cone breakup in the mids/highs.
Click to expand...

Warm is nice...

Im trying to stick with the Sunn look. My ultimate goal is to have a matching 2000s and-or 200s Head and cab. :smug:

Building it myself will allow me to modify the cab so it will accommodate newer drivers while still having 'the look'.
I'll just sell the D130's

As for the head Im using now. Its a Kasino 200-U? I dont have it with me but I'll check when its back at my house. 200w at 8ohms I think and it came with a 2x15 cab(Wired to 16ohms I believe.) Which i dont have. It sounds pretty nice. Warm and loving and it has a 'Selectone' option which I have no Clue what it exactly does, but messing with it will give you some pretty cool tones. All in all, its a pretty nice amp.
 
#33
Exxcell said:
I searched but to no avail...

Is there ANY way of wiring two 8Ω speakers into 8Ω? Like building a 'fake' crossover and send full range to both speakers?

Thanks!





(PS. Shout out to Bill Fitzmaurice. I have a mound of respect for you that equals a mountain.)
Click to expand...

I hope I am not making a mountain out of a molehill but...

Options are:

1) Use one speaker in each box. You have two 8 ohms speakers -ideal for running with two more if you like on a shuttlemax 12...

2) use a crossover - make one a woofer and one a mid - looks like you have two but effectively, only 1 bass speaker.

3) Use four of them, in isobaric format series/parallel - this would leave two speakers on the outside with two hidden behind, all 8 ohms together. you can only see two but lose efficiency, add weight and cost for little benefits (except making the box smaller!)

...thats about it.
 
#34
Exxcell said:
Warm is nice...

Im trying to stick with the Sunn look. My ultimate goal is to have a matching 2000s and-or 200s Head and cab. :smug:

Building it myself will allow me to modify the cab so it will accommodate newer drivers while still having 'the look'.
I'll just sell the D130's

As for the head Im using now. Its a Kasino 200-U? I dont have it with me but I'll check when its back at my house. 200w at 8ohms I think and it came with a 2x15 cab(Wired to 16ohms I believe.) Which i dont have. It sounds pretty nice. Warm and loving and it has a 'Selectone' option which I have no Clue what it exactly does, but messing with it will give you some pretty cool tones. All in all, its a pretty nice amp.
Click to expand...

When you say the amp is "scraping by", is it rated to be safe running 4 ohms?

If this a somewhat temporary solution, I'd use a pair of CB158's and wire them in series how if you have to, then switch them to parallel when you get your tube amp. The Delta's would work with your current amp, but would fart out with anything much stronger. They'd also be voiced differently, take more cab modelling/figuring, etc. The legends are more friendly towards different box sizes, tunings, etc. A good retrofit for a lot of older cabs. Beta's are another good low cost option, take more power/lows than the Delta, but they want a larger box, or lower port tuning to keep from getting boomy....lots of 100hz output.

Somebody here will have good measurement of the old Sunn cabs, could get more accurate sound predictions. The midbass response bump of the Betas and Deltas makes them sound loud/fat in the bass, but too much of that gets boomy, indestinct notes, especially in already bad sounding rooms. It does help to keep from sounding thin when playing outdoors. The Legends are smoother in the lows, high in spl, and are much easier to drop in something and get a decent sound, provided you're not looking for a bright sounding speaker, and can take the beating from a more powerful amp you may get someday.
 
#37
cool well those 37 watts will work fine with the D-130's then.

A single D-130 will average 100dB and have a wonderfull 103dB peak. more highend than a 12 or a 10.

so a 2x15 pair will be close to 103dB with a peak of 106dB
for low level bands or mixed stages. it will work fine.

if you need to be louder, do what everyone else did.
run 2 cabinets. which seems to be his future goal.

a Eminence 15B sounds nothing like a D-130.

a single cab at 4ohms is fine for a Sunn 200 or 2000
if you need to run 4 15's wire in series parallel.

basically 2 15's wired in series for 16ohms ran in parallel will be
8ohms.
Hiwatt and I think Kustom had a switch for their 2x15 cabinets.
to make them 16 or 8ohms.
The only time it is bad to run series cabinets is when the whole load is in series. if you blow a speaker. then there is no load, since the speaker is in series.
So just like every series/parallel 4x12 and some 4x10 it is ok because if you blow a driver. you still have another string of
drivers providing a load.
Likewise with running 2 2x15's in series.
if one blows the other is still providing a load.
 
#38
I'd view this build as a cab for an amp he doesn't have yet. Depending on what that amp is, and what tone he likes, that could be CB15's or it could be EV 15L's. One can't do anything like the other can, going both ways, but until his new amp is here, or he's dead set on what it's going to be, it's all guesswork. The Sunn 200 could do the D130's., the 2000, more of an inbetweener, something more powerful?, something different still.
 

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