SR-71's Seas ER18RNX 7" woofer sold out at Madisound :( Other 2-way suggestions? - diyAudio
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Old 23rd December 2007, 09:43 PM   #1
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Default SR-71's Seas ER18RNX 7" woofer sold out at Madisound :( Other 2-way suggestions?

My wife was buying me this for Christmas and we were waiting for it to ship: http://www.madisound.com/catalog/pro...oducts_id=8307

Unfortunately, we get an email the next day from Madisound saying that the 7" woofer from the SR-71 kit is sold out. The sales person was asking my wife if she wanted a suggestion for another 2-way instead.

I'm wanting these for my HT setup (Rotel RMB-1095 amplifer, RSP-1068 preamp) and I like big sound so I don't want to go smaller than a 8" woofer for the mains really, but 7" was the largest I've seen in a 2-way. This is probably because any larger than 7" for a 2-way and there's a balancing issue I suspect. I'm planning on purchasing two more kits for my surround, center, and center back. My dad was about to purchase three of these kits for his own HT setup. I know that John (from Zaph) suggests to not use these on a shelf/bookcase, but I was going to set the front left-right pair on this: http://www.furniturelandsouth.com/zo...ct=01-0652-908 (just the bottom console part, the hutch will not be used). I figure I'd want to decouple the speaker from the furniture's surface. It's interesting that most DIY designs are made for stands, but I'm not a fan of them anymore since little kids come over and play in the living room (could knock over).. plus, it's hard to justify the extra width taken up by my 65" tv on the wall I'm using. After building the SR-71's, I wanted to then order the other two kits so I can make the other speakers. The only reason I wanted to do that was because I thought it would be best to keep all speakers matched in this setup (I'd also use it to mix 5.1 audio).


I hate to hear of a company selling out of something. I don't know if they're phasing out the SR-71 kits or something but I suspect that may be the case since the salesperson suggested a different 2-way kit instead of offering an ETA on the woofers.

Has anyone else had this issue lately? I feel crappy because I spent a couple weeks researching the best combination of parts and I finally wanted to get these. Hmm.. so what else is there since I can't get these? My budget is $400 per pair and I want to use the speakers for HT and also SACD listening.
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Old 23rd December 2007, 10:07 PM   #2
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The SR71 kit is brand new, they probably didn't stock enough ER18s for the demand. That said, I'm sure the wait won't be that long to get more in stock.
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Old 24th December 2007, 02:16 AM   #3
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I was hoping they would designate a pair of ER18's for each kit so that they would be available when someone placed an order. It sounds like they just pull an ER18 off the shelf to fulfill the kit, which kinda does make sense logistically. Perhaps someone that ordered some single ER18's could fill us in on the backorder status if there is one?

Should I wait for this kit to be complete or should I substitute a similar parameter woofer in its place? Bad idea? I did like the fact that it was a "kit."

OH yeah, I was wanting to ask if anyone has taken a kit like this and "added" another chamber to the speaker enclosure for a subwoofer (~10-12"). FULL range mains sound really good...
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Old 25th December 2007, 06:31 PM   #4
Mike C is offline Mike C  United Kingdom
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Quote:
Originally posted by buttfacelicker
Should I wait for this kit to be complete or should I substitute a similar parameter woofer in its place?
My comments, for the little that they are worth.

Based on a very brief listen to my current project using these same drivers (in MTM), I'd say that the ER18 is an exceptionally good driver and I suggest you wait for them, hard though it may be.
Also, my modelling of my design shows some small 'issues' that I may want to look at in the voicing process. Though the speakers are different, similar issues have already been identified and sorted by Zaph for the SR-71; so I'm confident that by staying with the proper design you will have a well supported, well developed project that will be easy to voice to a very high standard.
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Old 25th December 2007, 06:42 PM   #5
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Build the L18/27 TBFGC while waiting; when the E18's arrive build them and pick the winner....use the looser in another room or sell it/ gift it. Speaker building is a journey not a destination--roll down the window and enjoy the breeze.

Ray
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Old 25th December 2007, 09:17 PM   #6
peter_m is offline peter_m  Canada
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Check this thread for different suppliers: http://www.htguide.com/forum/showthread.php4?t=28179

I would wait for the ER-18. Should (on paper at least) sound better then the L18... My theory!
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Old 26th December 2007, 02:41 AM   #7
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Peter_M,
How did you arrive at that conclusion?

Ray
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Old 26th December 2007, 05:46 AM   #8
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Thanks guys. We're gonna wait for the ER18 to come in and I'm going to start planning the enclosures. I bet quite a few people are waiting for these.
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Old 26th December 2007, 02:47 PM   #9
peter_m is offline peter_m  Canada
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Quote:
Originally posted by Ray Collins
Peter_M,
How did you arrive at that conclusion?

Ray
Like I said, it's just my humble opinion... based on two things:

1) The ER18 has a lower x-over point on a better behaved woofer. On the L18 it still shows some of the 8khz breakup... be it 30db down, but it's still there...http://zaphaudio.com/audio-speaker17...individual.gif

2) The ER18 has slightly lower harmonic distortion.

You could say I never heard either one... But like I said... on paper the ER18 looks better to me.
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Old 26th December 2007, 10:30 PM   #10
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The higher crossover point of the L18 puts less load on the tweeter. The breakup at 8000Hz is well after the crossover point and, as you indicated, 30dB's down which shouldn't be a factor.

I think that the sound of the metal cone vs. the pulp cone is more of a factor. ????


Ray
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