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Warwick Hellborg 215?

Joe Louvar

Joe Louvar

Guest
Jun 6, 2011
7,543
289
Santa Rosa, CA USA
www.reverbnation.com
#1
How does the Warwick Hellborg 215 work (the bottom cabs in the pic)? Is the downward facing driver and forward facing driver sealed in the top half of the cabinet with the downward driver facing into an empty (bass camber?) space behind the 4 big ports on the bottom half of the cabinet? Or what? What kind of design is this?

633517373400000000.jpg


EDIT: Note - no specs or details on Warwick website.
 
#2
Depends on how its divided up inside. Is the outward facing one just a mid, in its own box, or they are both in a sealed chamber and thus isobaric. Or it could be some sort of acoustic bandpass like the schroeders. Or ports for the top section too and some sort of 4th order bandpass thing. Lots of scope.
 
#4
These speaker cabinets are designed to address all different situations and needs. The Big Cab is a full range hi-fi speaker. It would easily rival a large studio monitor in sound quality. The Hi Cab is created to compete with loud guitars. It will give the clarity, presence or simply call it loudness that you need competing with a noisy work environment. It can be combined with the Big Cab or the Lo Cab. The Lo Cab is a lo-end complement to the Hi Cab and also the Club Cab. Finally the Club Cab is designed to be portable, full range and loud enough to deal with any small venue or club setting.

Big and Club Cabs are designed around a coaxial 15" speaker developed in cooperation with Celestion. A powerful full range speaker that takes advantage of the phase linearity that coaxial technology (high frequency driver in the middle of the bass driver) gives. The Big Cab is a hybrid Direct Radiating-Bandpass design giving extended bass response. The Hi Cab uses 12" Celestion speakers with a so called whizzer cone that improves the hi-frequency response to the point that you, in many cases, don't need a tweeter, particularly in music styles that don't call for an exceptionally bright bass sound. It is a Rock'n'Roll cab, really.

Type 2x15 direct radiating bandpass cabinet Frequency Response 40Hz - 20kHz Power Rating 500 watts RMS Peak 1000 watts Impedance 4 ohms Sensitivity 102dB SPL @ 1w/1m Speaker 1 x custom designed Celestion 15" coaxial speaker and 1 x 15"
Celestion bass speaker
Dimensions (H x W x D) 42" x 21" x 18"
Weight 92.6lb
Click to expand...

Lots of words, no information.
 
#6
These speaker cabinets are designed to address all different situations and needs. The Big Cab is a full range hi-fi speaker. It would easily rival a large studio monitor in sound quality. The Hi Cab is created to compete with loud guitars. It will give the clarity, presence or simply call it loudness that you need competing with a noisy work environment. It can be combined with the Big Cab or the Lo Cab. The Lo Cab is a lo-end complement to the Hi Cab and also the Club Cab. Finally the Club Cab is designed to be portable, full range and loud enough to deal with any small venue or club setting.

Big and Club Cabs are designed around a coaxial 15" speaker developed in cooperation with Celestion. A powerful full range speaker that takes advantage of the phase linearity that coaxial technology (high frequency driver in the middle of the bass driver) gives. The Big Cab is a hybrid Direct Radiating-Bandpass design giving extended bass response. The Hi Cab uses 12" Celestion speakers with a so called whizzer cone that improves the hi-frequency response to the point that you, in many cases, don't need a tweeter, particularly in music styles that don't call for an exceptionally bright bass sound. It is a Rock'n'Roll cab, really.
Click to expand...

Type 2x15 direct radiating bandpass cabinet Frequency Response 40Hz - 20kHz Power Rating 500 watts RMS Peak 1000 watts Impedance 4 ohms Sensitivity 102dB SPL @ 1w/1m Speaker 1 x custom designed Celestion 15" coaxial speaker and 1 x 15"
Celestion bass speaker
Dimensions (H x W x D) 42" x 21" x 18"
Weight 92.6lb
Click to expand...

Thank you, that is the most info I've seen about the Warwick Hellborg 215 cab so far.
 
#9
Joe Louvar said:
I still haven’t found a “Direct Radiating Bandpass Cabinet” design - is there such a known design or is this something new?
Click to expand...

Bandpass meaning a speaker is inside a box with holes in, direct radiating means a speaker touching air directly. It has one of each. Both terms can cover a bunch of alignments though, so it doesn't really tell you anything.
 
#10
Hi guys, thanks for the question on the Hellborg cabinet. The Big Cab is a hybrid construction where the bottom part works as a bandpass, and the top part as direct radiating bass reflex cabinet.
The bottom 15" is mounted on a baffle directed downwards. Both enclosures are vented. The drivers and cabinets in the Hellborg series are developed together by the R&D team at Celestion in the UK in cooperation with Jonas Hellborg. Thanks!
 
#12
Way cool - thank you Mr. Foxen and Warwick for explaining “Direct Radiating Bandpass Cabinet”.

Are the drivers sharing airspace?
Click to expand...

This is what I was asking?

And I caught that
Both enclosures are vented
Click to expand...
but without knowing if the drivers share airspace or not I’m not sure what is meant by “Both”?

Are they same or reversed polarity?
Click to expand...

And this is a good question too? Thanks


EDIT: and thanks for the link Unchain.
 
#14
Well, "Both enclosures are vented" very clearly implies that they do not share airspace, right?

Joe Louvar said:
And I caught that but without knowing if the drivers share airspace or not I’m not sure what is meant by “Both”?
Click to expand...

So this is my take on it:
Two enclosures in one box. Top one is a vented direct radiating design with concentric drivers. Bottom one is a vented bandpass design with a single 15" driver firing downwards.
 
#16
Mr. Foxen said:
The two drivers might be in the same top box, but one faces into the bottom box, and the other one faces outward into the air directly.
Click to expand...

This is how I’ve been understanding it so far - but Warwick said "The bottom 15" is mounted on a baffle directed downwards" and LowB-ing makes some points as why I'm confused.

Warwick, can you help shed a little more light on this for us/me please? Thanks
 
#18
There are a few different designs called "bandpass". 4th order, 6th order, etc. The basic concept is, middle and upper frequencies don't go around corners well like lower frequencies can. So, by firing the driver downward, or at an angle, or into a chamber inside the box, forcing the sound to travel around corners before it comes out towards the listener, you can use the box to filter out the middle and upper stuff, sort of lowpassing the speaker without a crossover.

There's more to it than that, but it's the basic idea. In a cab like that, they would be using the bandpass to put bottom under the coax that's facing forward.



4thorder.gif




quasisixbandpass_.gif




33738d1322660936-trying-do-budget-home-stereo-sub-setup-icons.jpg




6thordbp_series.GIF
 

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