RBR-KIT, the “Recession Buster Reference” Kit, Pair
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RBR-KIT, the “Recession Buster Reference” Kit, Pair
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Great timing . . . I leave for vacation on Saturday to visit my sisters. I'll still have access to internet though. I'm sprucing up my website as fast as I can.
On top of that it's been speaker building testing non stop for the last few months. This little kit rocks though so it'll be worth the effort. I think you guys will like it quite a bit! There's ~100 of them so get em while they're hot!- Bottom
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Right on Jed! $400 is a bargain...- Bottom
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A pair of SS 15S drivers is ~$436 alone. As a kit you get two SB29 tweeters, crossovers and $37 for the purchase. That's an incredible value. And I imagine they must sound fantastic. I just wish I had the moola.John- Bottom
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Upgraded crossover worthwhile
Originally posted by JedGreat timing . . . I leave for vacation on Saturday to visit my sisters. I'll still have access to internet though. I'm sprucing up my website as fast as I can.
On top of that it's been speaker building testing non stop for the last few months. This little kit rocks though so it'll be worth the effort. I think you guys will like it quite a bit! There's ~100 of them so get em while they're hot!
Is the upgraded crossover worthwhile ?
I'm really considering a kit... or two! This is deal is too good to let it pass. :E
My wife don't it yet, but she's going to be mad, real mad at me when she'll see my new toys!!!
Chuck- Bottom
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Originally posted by NyxOneHi Jed,
Is the upgraded crossover worthwhile ?
I'm really considering a kit... or two! This is deal is too good to let it pass. :E
My wife don't it yet, but she's going to be mad, real mad at me when she'll see my new toys!!!
Chuck
I don't know how "Madisound" can offer a kit of this kind at such a price but this is one hell of deal!
Thanks Jed & Mad!
Chuck
ThomasW : Please let me know if I'm stretching to much the forum's rules!- Bottom
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Originally posted by HareBrainedA pair of SS 15S drivers is ~$436 alone. As a kit you get two SB29 tweeters, crossovers and $37 for the purchase. That's an incredible value. And I imagine they must sound fantastic. I just wish I had the moola.
Yes I wish I had the money right now as well. Would be a fantastic speaker for my bedroom I think.- Bottom
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Originally posted by NyxOneI just couldn't wait... I've pulled the trigger on one kit (with the upgraded crossover parts).
The upgraded crossover uses a lower DCR series coil that helps flatten the response a tiny bit. I like all the Clarity Caps... although I haven't used the uber expensive ones.- Bottom
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Originally posted by JedThe upgraded crossover uses a lower DCR series coil that helps flatten the response a tiny bit. I like all the Clarity Caps... although I haven't used the uber expensive ones.
Seriously this is the first time I'm buying a kit and I thought that 50 buck would not kill me. Also, I won't be asking myself what kind of sound they would have had with the upgraded crossover... I'll just know!
Chuck- Bottom
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Kit is really an unequaled value. It makes you stop and just think "Do I have any justification, at all, to buy these, because they are a fantastic deal". Although, I think not having the option to use a pre-built cabinet (7.5" baffle width requirement) is limiting for kit builders. Thoughts on cabinet options?- Bottom
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Originally posted by wigginjsKit is really an unequaled value. It makes you stop and just think "Do I have any justification, at all, to buy these, because they are a fantastic deal". Although, I think not having the option to use a pre-built cabinet (7.5" baffle width requirement) is limiting for kit builders. Thoughts on cabinet options?
I'm sure if you email some of the known cabinet builders around they should be able to quote you and get a good deal.- Bottom
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Jed,
Maybe I missed it, but your page isn't totally clear on the diameter of the port.- Bottom
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2" diameter double flared port with a total length of 9"
IB subwoofer FAQ page
"Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson- Bottom
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Originally posted by Dougie085Yes I wish I had the money right now as well.Javier Huerta- Bottom
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I noticed that no one ran the numbers on this woofer, so I pulled up Unibox.
The vented enclosure has a predicted F3 ~ 30Hz!!!!!!!! In Jed's comments, he does mention the outstanding extension of these drivers. It's not a subwoofer but if you were thinking of spending $400 on a TM + sub, this would be an great "compromise".
For those interested, sealed is predicted as F3~58Hz. Perfect for integration with a powered SEAS L26ROY, or 2.John- Bottom
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Originally posted by JedThey specifically didn't want me to use a certain competitor's cabinets for obvious reasons and the narrow baffle minimizes diffraction. Plus my cabinet calls for more bracing than you'll get with one of the prefabs.
With your design out, I don't see anyone building the ZD5 for a while unless they specifically want a tweeter that's an "outie" instead of an innie. :B
On a side note, I see that Scan-Speak has their own version of the XT25 now, $56. One has to wonder if there are any changes.- Bottom
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Originally posted by jkrutkeOn a side note, I see that Scan-Speak has their own version of the XT25 now, $56. One has to wonder if there are any changes.
http://www.madisound.com/catalog/pro...oducts_id=8646 Scan
http://www.madisound.com/catalog/pro...oducts_id=1181 Vifa- Bottom
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Originally posted by jkrutkeI see that Scan-Speak has their own version of the XT25 now, $56. One has to wonder if there are any changes.- Bottom
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ZD5 vs RBR
Originally posted by jkrutkeSame thing I did with my ZD5 design - I went 7" wide because there was almost no diffraction ripple. Yet somehow I managed to need to notch filters in the woofer circuit. :E
With your design out, I don't see anyone building the ZD5 for a while unless they specifically want a tweeter that's an "outie" instead of an innie. :B
Again...I'm not trying to start an argument or anything, I'm just trying to learn how two different designers put together high-performance systems using the same (or at least similar) high-performance drivers.-Alan
There's no mystical energy field that controls my destiny. It's all a lot of simple tricks and nonsense.- Bottom
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Can't wait.
Hi, first post here. I just ordered the kit. Thanks Jed. The specs look almost ideal for what I'm needing. Been lurking here for about 2 hours a day for the past 6 weeks now, and these showed up. They look & I'm sure sound awesome and a great price too. Showed wife your pics and she said "Those are beautiful and you are so good at building those kinds of things, get them". 15 minutes later they were in my shopping cart and now are on the way here. Thanks Jed and Madisound for such a great deal and design. Now, I just got to build them. I'll keep you posted. :B- Bottom
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Originally posted by WalkinPaulHi, first post here. I just ordered the kit. Thanks Jed. The specs look almost ideal for what I'm needing. Been lurking here for about 2 hours a day for the past 6 weeks now, and these showed up. They look & I'm sure sound awesome and a great price too. Showed wife your pics and she said "Those are beautiful and you are so good at building those kinds of things, get them". 15 minutes later they were in my shopping cart and now are on the way here. Thanks Jed and Madisound for such a great deal and design. Now, I just got to build them. I'll keep you posted. :B- Bottom
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Originally posted by AlanHI know the ZD5 was set up with a full 2nd-order crossover and a ladder delay for the phasing. How does this compare to your approach Jed? What are the trade-offs of each approach and why did you make the choices you did?
A ladder delay aligns the phase of the tweeter with the midrange if using a shallow slope, such as LR2 on a flat baffle, where the acoustic centers are not aligned. Shallow slopes are sensitive to phase cancellations around the Fc, if the drivers phase is not aligned-- so the delay circuit helps to deal with the dip that would be the result without it.
The goal with this kit was to keep the parts count in the crossover to a minimum while using drivers that are up to the task of hitting the desired transfer functions. The 15W has a remarkably smooth response as does the SB29 in this baffle. The off axis response is very good as well with the selected crossover topology, so I'll leave it at that.
For every speaker there is a recipe. For this one we wanted simplicity yet effective design and to bring it all at a price never before seen with a Scan Speak driver.
Here are some of the notes about those choices and why I did what I did:
All crossovers can be more complicated, and I did have one crossover iteration that used about 6 more components, but in the end I was able to hit the same targets without the additional parts (or at least very close). It just took time. Sometimes less is more and the crossover does its job. Therefore, the crossover realizes what we set out to achieve.
JedLast edited by Jed; 14 August 2009, 23:26 Friday.- Bottom
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Originally posted by Dougie085It sure looks identical to the Vifa counterpart....
http://www.madisound.com/catalog/pro...oducts_id=8646 Scan
http://www.madisound.com/catalog/pro...oducts_id=1181 Vifa
BTW: I noticed that at the ScanSpeak website they also offer a bucking magnet version. R2604-833000Last edited by benchtester; 08 August 2009, 17:20 Saturday.- Bottom
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Originally posted by Dougie085It sure looks identical to the Vifa counterpart....
http://www.madisound.com/catalog/pro...oducts_id=8646 Scan
http://www.madisound.com/catalog/pro...oducts_id=1181 Vifa- Bottom
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this kit seems almost too good to be true. i just had to pull the trigger finally something that can replace the void in my heart when i sold my big pair of the statements. not that the mini statements looked anything dismissal but a whole kit for the price of the scanspeak alone? :B my problem is though i'm still a noob and can't read the graphs too well so i don't know if this tube amp http://cgi.ebay.com/MING-DA-MC-84A-s...ht_3717wt_1165
would be enough to do the job at low volumes where i intend to keep it at. what would you say is the sensitivity on the rbr kit? MING DA MC-84A is reviewed to have huge power for its wattage.- Bottom
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Originally posted by Coconutoutthis kit seems almost too good to be true. i just had to pull the trigger finally something that can replace the void in my heart when i sold my big pair of the statements. not that the mini statements looked anything dismissal but a whole kit for the price of the scanspeak alone? :B my problem is though i'm still a noob and can't read the graphs too well so i don't know if this tube amp http://cgi.ebay.com/MING-DA-MC-84A-s...ht_3717wt_1165
would be enough to do the job at low volumes where i intend to keep it at. what would you say is the sensitivity on the rbr kit? MING DA MC-84A is reviewed to have huge power for its wattage.
I have to chuckle a bit at your last statement; I'm sure it's meant with the best of intentions, but saying that an amp offers huge power for it's wattage sounds like an oxymoron. Of course, the amplifier may be under rated, or it may clip more gracefully than some other designs. It does have taps for both 8 ohms and 4 ohm loads, so it is possible to optimize the power transfer for the speaker you have (rather than not having enough volts or enough amps depending on the impedance). The impedance only rarely dips to 8 ohms, so this amplifier should have no difficulty driving the speaker. However, tube amps with high output impedance do exhibit frequency response variations by interacting with the load, so the impedance rise at 60 Hz may affect bass quality with this amplifier, and the rise in the midrange around 1200 Hz to about 18 Ohms may result in a forward characteristic in this frequency range, due to the power amplifier. 13 watts should be OK for listening levels up to about 90 dB peak.the AudioWorx
Natalie P
M8ta
Modula Neo DCC
Modula MT XE
Modula Xtreme
Isiris
Wavecor Ardent
SMJ
Minerva Monitor
Calliope
Ardent D
In Development...
Isiris Mk II updates- in final test stage!
Obi-Wan
Saint-Saëns Symphonique/AKA SMJ-40
Modula PWB
Calliope CC Supreme
Natalie P Ultra
Natalie P Supreme
Janus BP1 Sub
Resistance is not futile, it is Volts divided by Amperes...
Just ask Mr. Ohm....- Bottom
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Originally posted by Coconutoutthis kit seems almost too good to be true. i just had to pull the trigger finally something that can replace the void in my heart when i sold my big pair of the statements. not that the mini statements looked anything dismissal but a whole kit for the price of the scanspeak alone? :B my problem is though i'm still a noob and can't read the graphs too well so i don't know if this tube amp http://cgi.ebay.com/MING-DA-MC-84A-s...ht_3717wt_1165
would be enough to do the job at low volumes where i intend to keep it at. what would you say is the sensitivity on the rbr kit? MING DA MC-84A is reviewed to have huge power for its wattage.
I would recommend a 100W amp for these kind of speakers.- Bottom
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I don't think these particular speakers really need 100 watts. Also if he's interested in tube amps he's pretty unlikely to get a tube amp with that kind of power. These speakers are made for critical listening and honestly could probably do with 30 watts at high outputs but he said he was looking for moderate volumes so something around 10-15 watts could work quite well.- Bottom
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I would expect so- just as mine does with the Modula MT or Neo D CC. But then we have the folks shooting for 95% efficient systems with horns/CDs and pro sound drivers, so I guess it takes all types! Those may do better with a 12 watt per channel tube amp.the AudioWorx
Natalie P
M8ta
Modula Neo DCC
Modula MT XE
Modula Xtreme
Isiris
Wavecor Ardent
SMJ
Minerva Monitor
Calliope
Ardent D
In Development...
Isiris Mk II updates- in final test stage!
Obi-Wan
Saint-Saëns Symphonique/AKA SMJ-40
Modula PWB
Calliope CC Supreme
Natalie P Ultra
Natalie P Supreme
Janus BP1 Sub
Resistance is not futile, it is Volts divided by Amperes...
Just ask Mr. Ohm....- Bottom
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Originally posted by WalkinPaulHi, first post here. I just ordered the kit. Thanks Jed. The specs look almost ideal for what I'm needing. Been lurking here for about 2 hours a day for the past 6 weeks now, and these showed up. They look & I'm sure sound awesome and a great price too. Showed wife your pics and she said "Those are beautiful and you are so good at building those kinds of things, get them". 15 minutes later they were in my shopping cart and now are on the way here. Thanks Jed and Madisound for such a great deal and design. Now, I just got to build them. I'll keep you posted. :B
Welcome, congrats, and... she sounds like a keeper!! :T
Keep us posted and post some pics!
Jon- Bottom
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xO i didn't word my last sentence properly but what i meant was that the reviews comment on how powerful it sounds despite its actual output. my last el84 amp that was modified from an organ amp also had an impressive bass until my dog blew out the tubes by licking them :P i always come here right before going to sleep... helps me to have sweet dreams about systems i wish i'd have.- Bottom
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