DIY subwoofer project: Stryke Audio HE 15 - Page 9  

The only option I see in a plate amp are the new amps at Adire. The problem arises more with the load configuration though, as these amps are optomized at 4 Ohm loading. The HS-500, A750, and A1500 look like good possibilities, and a pair of A750s could possibly be used with one on each coil. For that money though, get a K1. That said, for $799 you could get the A1500 and push 700W into an HE15, which should give very good results. It does not have an internal XO, but if used in a HT, the processor's crossover should work fine.

Mark Seaton

Eric,

As John stated in the small "book" he posted on page 7 of this thread, the HE15 is a subwoofer. It should be crossed 2nd order or greater below 100Hz. Furthermore, I wouldn't think of having a single 15" driver cover deep bass to the teens while trying to reproduce 300Hz. Factor in the vanishingly low distortion and clarity of the Unity horn, and you realize you start compromising what makes the Unity so special. A pair of 8-10" drivers, or 4 6.5" drivers would be the absolute minimum quantity of midbass power to mate to the Unitys. The ideal match is Lambda's TD15 series drivers. My system will have use the Dual HE15 sub to complement <60-80Hz with my Unity and dual TD15H main speakers which will have a sealed response down to ~65Hz. While the Unity Summation Aperture is still in it's infancy, of probably 3-4 years old, it is a truly amazing design when used properly.

Mark Seaton

Hi Jack http://www.avsforum.com/ubb/smile.gif

Yes the comparison should be interesting. Also I replaced the old slot loaded sub in the family room with a new 4 Shiva "Mini-ME" IB in the family room last week. I haven't had time to post pics or info about it yet.

The Entecs are a few years old but were a top of the range ($6K new) sub designed in particular for Wilson WATTs. The electronics are from Spectral with custom drivers.

They are highly damped and very 'fast'. Probably would do 300Hz.

I'm kind of glad I did have to leave Chicago without hearing the Unity Horns, as one of my fave things is uncompressed dynamics, which I imagine the horns do well. You might have tempted me http://www.avsforum.com/ubb/smile.gif.

I have a hankering to try out the AvanteGarde Unos for the same reason.

Still, it is good having a kind of modular system so possibilities can present themselves.

Steve

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Steve's Stuff

... 'a pair of 8-10 inch drivers'...

You mean like the two ten inch drivers in the sealed Entec subwoofers I am currently using with my WATTs?

I'm beginning to hate you all!

http://www.avsforum.com/ubb/smile.gif

Then I started re-reading the thread about Bob's 'ultimate' system and BG ribbons....


AARRRGGGHHH!!!

Steve



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Steve's Stuff

Steve,

Well, don't hate us, just be thankful you know there is an interesting option to consider once you get "used to" having the HE15 in your system. I'm not terribly familiar with your Entech subs, but the Lambda Unity horn needs to be crossed at ~300Hz to a midbass section, I'm not sure if the sub is capable of such set-up. As for being enough... they would definitely do a wonderful job when crossed at 60Hz or higher, but would definitely be the limiting section of the system http://www.avsforum.com/ubb/eek.gif. Some form of Unity speaker was on the list of "cool toys" I mentioned you could check out next time in Chicago.

Mark Seaton

Thomas I'm five or ten minutes away from you. I'm just north between Colorado and Monaco near Colfax. I would love to come over. Here's me email address dljacob@uswest.net. Have you ever met or talked with Tyson Neidig? He is in the neighborhood, and might be interested in coming over too. He is nOrh/SVS owner and enthusiast. I'm wondering if I could talk to you before this weekend however. I'm looking at the preorder date cutoff, and not sure which direction to go. I've been told about making subs with the Tempest drivers, and they would also apply to the Shivas. But the thought of having the cabinets preassembled and ready for me finishing sounds kind of nice. But cost is also a factor. I don't want to overpower my room, but quality has to be the number one factor. If I go with a pair of the 15.4s will they be too much for 3150 cubic feet? They'll either be supporting seven nOrh marble 9.0s for theater or to a pair of Apogee's "The Apogee" full ribbon speakers. The Apogees really don't need support, for they are dedicated two channel, but a little more quality might help. Phone number is 303-322-8130. Do you know if the Preorder date is flexible by a couple of days?

bump^

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I Love This Stuff.
ILTS
Boycott HDCP,5C and DFAST

Bob, thanks, that is what I was concerned with. Too much can be too too much. Thanks Your using a Crown k2 correct? Would you prefer two 15.2s vs. one 15.4? Does amplification change with either of these options?

Still looking for a viable alternative to the K2. John J of Stryke and others have pointed out the Samson S2000 is likely unstable at under 4 ohms.

How about the Mackie 2600? 1300W/ch at 2ohms. Built in low cut filter variable down to 10Hz. ~$900 at various sites.
http://www.mackie.com/Products/FR_Series/M2600.asp

Or is the K2 just so perfect for this sub I should pack it in and spend the extra $400 or so?

The more I look, the more expensive this audio/HT is getting. I have to get home to the U.S. and start buying some of this stuff before I "virtual upgrade" myself into poverty.

BB

Right. Sorry, this thread is really long and I missed that you had mentioned Mackie before. Going Crown shopping.
Thanks

BB

Bob:

Find me a Macro Tech 3600 or a 5000.. http://www.avsforum.com/ubb/biggrin.gif


My DJ contacts can't get me a good deal like they did on the K2.

I've got a brand new factory sealed K2 showing up tomorrow. I paid $950 for it. This dealer says he has a few more. Once i get it, I'll let everyone know if it is new and I'll give you the number for the dealer. I've been following the shipment by fedex ground. The box weighs around 50 pounds.

Ken

Ken,

Keep us posted. Thanks!!!

Here's my dumb question for the day. I noticed in the PDF users manual for the Crown (on their web site - gotta love the web) that they only have balanced inputs for the K2.

I don't have balanced outputs on my B&K Ref 30. Just the rca Sub out.

So, what are the pros/cons of hooking the K2 to the Ref 30? (hum, noise?) What kind of adapters/cabling will i need? I plan on hooking the K2 up to the Stryke 15.2 - one channel per voice coil (already got the dual input cup from madisound, etc.) Does that sound right?

Is the K2 overkill for the single 15.2?

Thanks in advance for the education/information...


John

[This message has been edited by reddavid (edited 06-13-2001).]

Well I just placed my order. I will be doing a DualPower sub with 6 of the 15" PRs. I can't wait for the stuff to arrive. Until then I guess I will start gathering the other items I will need.

I know this is going to be fun. Off to Home Depot tomorrow.

Regards,

Hitesh.

John,

For the K2, you can go to Radio Shack and pick up the 1/4" to RCA/phono plug adaptors and you can then use standard RCA connections. The authority of the K2 for bass use is worth this minor hassle. If you like, you can order from many companies a cable terminated as RCA on one end, and 1/4" on the other.

Mark Seaton

I have also just placed my order. $1246 US dollars, against the Aussie dollar of 52.7 US cents (current, hopefully the credit charge goes through at no lower). That works out to be about AU $2365 - and if the rate changes, I loose or gain about 30 bucks at a time. Damn, just learnt that our dollar rose above 53 cents US. That would have saved me US $20.

Can't wait now...... only about 6 weeks left!!!!!!

Well,

For those who've been concerned about the pre-order date, it looks like John was able to work out an extension. Before anyone gets up in arms about placing their order right away because of the deadline, if those orders weren't placed, the extension would not have been possible. So thanks to those who have jumped in on this awesome deal.

Mark Seaton

Below is the e-mail John sent out to the BASS list last night:

Hello,

Many people have asked me about the possibility of extending the HE15
preorder. The original issue was getting the order placed with TC sounds
before the price increase on June 15. What I am able to do is place the
order now, and add on additional quantity if necessary up until the drivers
are manufactured. So what this means is that I will be extending the HE15
preorder from now through June30. Preorders for the new 18" PR's will also
be taken at the current prices until June30. On July 1, the dual spider
version will be increased to $150, and the single spider will be increased
to $125. Free assembly on all cabinet kits also continues through June 30.
Thanks for the time.

John
************************************************************ *************
* John E. Janowitz http://www.stryke.com *
* 929 Laverne Dr. phone: 920-217-0625 *
* Green Bay, WI 54311 fax: 530-324-6667 *
* ICQ 6926537 AIM: stryke23x *
************************************************************ *************

Mark or Bob, what is the mounting height of the HE15?

Thanks for extending the preorder. I am buying a house and funds are limited right now.

Dave

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"Ne obliviscaris"

Bob, I meant the dimension from the back of the magnet to the flange.
Also how much does the surround stick out from the baffle?
Any ideas for type of grill?

Thanks,
Dave

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"Ne obliviscaris"

Dave,

John J said over at HTF that if you are going to put grills on they should be 1 1/2" out from the driver, thats with the counter sunk ones. I still have an HE 15 not mounted so I'll measure it and post it later today.
John

[This message has been edited by JBJR (edited 06-15-2001).]

I am making a frame for the grill cloth, building it up to 2 1/4" using (3) 3/4" pieces of stock for the driver, and (2) 3/4" pieces of stock for the PR's. The thickness is required to allow clearance for the drivers outward movement

If you look at the rendering of the power 15 you will see a lip to hide the edge of the grill behind. Past this lip I cut a 45-degree bevel in the frame to give it a more finished look. The grill frame is attached to the cabinet with velcro.

To reduce the potential of the grill frame rattling, I put window gasket foam under the grill cloth where the frame meets the edge of the speaker. This creates a problem when stretching the grill cloth around the frame, because you do not want to compress the foam. To get around this, I pre stretch the grill cloth by stapling it to a scrap piece of plywood, and then glue the money side of the frame to the cloth.


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Nothing difficult ever turns out to be easy

Time to change the thread name!

There is a new thread about a DYI center channel.
DYI?
I think that appropriate for this sub.
Do Yourself In....

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Buzz Goddard
TAG McLaren Audio

Hehehe

So Buzz, finally got that little monster a rockin? "Do Yourself In"... interesting description and rather appropriate once you break your first household item while playing with your new toy http://www.avsforum.com/ubb/smile.gif.

Mark Seaton