shepjk01

The lascalas look good. One tip to make things a little easier on not having to fill in holes on the outside of the cabinets is to use a kreg jig to connect the peices of plywood together. It is the best tool I have bought in a long time. http://www.kregtool.com/kregjig/index.php

I will look tonight and get the dimensions for the ports and post them if jwc doesn't get to it first. Also if I had to do it all over again there is a couple things I would do to make the build go even quicker. First I would build the cabinets out of 3/4 inch grade aa veneered plywood. You can get it in varying plys. Saves the time it takes to veneer the cabinets and it also comes out cheaper. Next I would cut the center peice that seperates the top and bottom halves down 3/4 of an inch depth wise that way you can cut one baffle instead of two. It would also look better. At the time I didn't think about it plus I'm going to veneer the front of the bass bins anyways.

They will work fine with the orginal plans. I used the new ports to tune a little lower also alot less time involved and the ports also help brace the cabinet.

jc, I will get some more pictures of the speakers up tonight after the kids go to bed. I'm very happy with how the project turned out as a whole. My plan is in the next couple of weeks to get the right equipment to take measurements. They will all have to be done inside as it is a little cold out at the moment. I took some measurements from 40 to 200 hertz in 10 decibel increments just using my radioshack spl meter with corrections applied it isn't the most accurate measurement but it will suffice for now. The drivers measured pretty flat with a nice peak from 60-80hertz and really where just barely down at 40. Below forty I apllied a steep low pass filter to protect the driver. I will say I listen to mostly rock and definetly prefer the bass from these over the lascala, cornwall, or k-horn. justin

Greg, I have to thank you on the fc260's as they are a wonderful horn. Anyone on the fence on ordering a pair shouldn't be. The price Greg is selling them coupled with the fit and finish make them a bargain in my book. As most know Greg does excellent work some of the best I have ever seen and when I first started veneering a few years back he was more than kind enough to answer all my questions I had on the process of veneering. Greg I would be honored if you used the pictures on your site to help promote your product.

Here is a picture of what it looks like after cutting all the wood peices I needed which took most of the day.

To start off I just cut out the peices I needed then tacked, glued, and clamped them in to place. After that I went through and put all the braces on the inside with screws attaching all the peices. Here is a picture taken after the glue had dried before I went through and added the internal braces.

Here is a pic of the veneer applied with just a coat of primer on the peices of the speakers that are black. No finish or finall prep work had been done to the veneer

Here is a pic I took when I had just the shell of the speaker put together, no veneer yet or any prep work was done

I appreciate the compliments. I'm very happy with the way they turned out. As is even with using alk crossovers they sound phenomenal. I have owned just about every klipsch home speaker and there is no comparison these sound that much better. The lascalas I have for sale where paired with a pair of jtr growlers for midbass impact and the dbb's are everything that combination was in one package. In the process of settling on the midrange driver to be used I had 4 different sets of drivers in house. The jbl 2485's, jbl 2446's with 2450 sl diaphragms, jbl 2441's and lastly a pair of ev dh1a's I bought from a forum member. I tried all of them on the fc 260 wooden horn and in the end the 2485's won out for midrange duty. They have a smoothness to them that all the other drivers except maybe the 2441 lacked. Both of the titanium diaphragm drivers sounded edgy. The 2441 was almost as good as the 2485 but with the crossover point at 400hz I could hear it lost steam in the low end compared to the 2485. Others may disagree but it is now my favorite midrange driver to bad it isn't a little lighter. I worked on the project for about 3 months from start to finish a little here and there when I had time.

close up ofright speaker top . The tweeter bezel is screwed in to allow easy replacement incase I decide to change tweeters

left speaker

Well inbetween work and having a 20 month old boy and 3 month old girl I finally almost finished my cornscala dbb build. The only thing left is to finish the front of the bass bins in veneer which will not happen until spring so right now the grills just cover the bass bin front. These cornscala dbb differ from the plans in the porting and the woofers used in the bass bins. Instead of being slot ported the bins have triangular ports in the four corners and also do not use k33's. Along with the help of jwc I opted to use the new eminence kapplite 3015lf. In my opionon a much better and lighter woofer. The bass bins are ported to a tune of 41hz. The tops are composed of a set of gregs fc260's along with jbl 2485j's and jbl 2404h for tweeters. As a stand in crossover for the moment I'm using alk's universal crossover while maybe not perfect for the combination they sound better than I expected. The final goal is to go to an active crossove and I'm currently gathering the peices to do so.I wil updat the thread with build pictures from when I was building them, but start with the almost finished product pictures.

I did some more digging and it apears to be a jbl 4560 which is a mid bass front loaded horn good from about 200-600hz which is basically useless for any 3 way aplication.

I came across these while taking my weekly ebay journey and would like some help identifying these speakers. Here is the link http://cgi.ebay.com/JBL-Sub-Mid-Woofer-Cabinet-16-older-Custom-Pro-PA_W0QQitemZ140343405486QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item20ad1e6bae&_trksid=p3286.c0.m14 They look to be some sort of front loaded horn. I e-mailed the seller with questions on them and didn't receive a response yet. They are pretty close to me and look interesting. I could not find a jbl model that looked like them. So any help would be appreciated and yes I know there not klipsch, but could make for an interesting project.

Buy new diaphragms for the tweeters from bob crities or have bob install them. Also have bob fix the woofer. As for the cabinets with the stain shown in the picture you would have to sand to far down into the birch to get them out not to mention the fairly deep scatches in the cabinets so I would not stain them as it will show all imperfections. I would either reveener them or fill in the gouges with bondo, sand them down, prime the cabinets then paint them. If you decide to veneer the heresys are about as easy as a beginner cabinet as you could ask for there just a rectangular box. There are a few of us here on the forums that could help you out if you have questions on the veenering plus the wealth of info available on the internet.

Jc, Are two of the boards of the three shown for the esn-600 could they not just be put on one board as al does in the extreme slope networks or did you do it for size purposes. Also what is the point of using two 3619 autotransformers isn't only one needed for the sqwaker?

jc, Thanks for the help and suggestions on the cornscala. I have decided to not go ahead with the project mainly due to the cost of the components for the steep slope crossover which would be the only one I would want to use in the cornscalas. I'm just going to modify my lascalas to fit gregs v-trac and be done with it.

jc, how was the bass ouput on the dbb compared to the lascalla. I'm still debating modifying my lascala to accomadate the vtrac or build the dbb's. The only reasoning behind the dbb was I'm curious if there is more bass output from them. Also I located the schematics on al's site and they are what I was looking for if I decide to go ahead with the build. Justin

jc, Thanks for the link to the thread. Also thank you for posting the plans for the bass bin design as that saves me alot of trouble. I went to alk's site and downloaded the crossover designs for the cornscala. My biggest concern is the attenuation of the midrange? Without testing it I'm not positive how much hotter it will run than the rest of the system. Did your crossovers designed by alk allow attenuation of the midrange? justin

Well I was going to use gregs vtrac in my lascalas but have decided against chopping up the front panels. Instead I'm thinking off putting together some cornscalas with the dual k-33's and use the vtrac in a custom speaker. Instead of using the bms drivers I have a pair of jbl 2485j's that I have had for a while that I'm going to mate to the vtrac. The tweeter will likely be either a beyma cp-25 or crities ct-125. I know alk has downloads for the cornscala using two k-33's. I need help with a crossover design for my proposed configuration. Here are the specs on the jbl 2485j. I would like to use a 12 db slope at 400 and 4500hz. SPECIFICATIONS: Nominal Impedance: 16ohms Minimum Impedance: 12ohms @ 5 kHz DC Resistance: 8.5 ± 10% @ 25°C Power Capacity¹: 120 W continuous program above 300 Hz Sensitivity: 111 dB SPL, 1 W @ 1 m on-axis on horn² 118 dB SPL, 1mW on plane-wave tube³ Nominal Efficiency: 30% (500 Hz to 2.5 kHz) Frequency Range: 300 Hz to 6 kHz Recommended Crossover: 300 Hz or higher, 12 dB/octave minimum Diaphragm: .23 mm 10.009 in) phenolic Voice Coil Diameter: 100mm (4 in) Voice Coil Material: Edgewound aluminium ribbon Flux Density: 1.9 T (19,000 gauss) Throat Diameter: 49 mm (2 in) BI Factor: 19 N/A Positive voltage to black terminal gives diaphragm motion toward the phasing plug Dimensions: 235 mm (911 in) diameter 330 mm (13 in) depth Mounting Four ¼-20 threaded holes, 90° apart on 101.6 mm (4 in) diameter Weight: 13.8 kg (30½ lb) Shipping Weight: 14.5 kg (32 lb) ¹Continuous program is defined as 3 dB greater than continuous pink noise and is a conservative expression of the transduceis ability to handle normal speech and music program material. Continuous pink noise power ratings are tested with pink noise input having a 6 dB crest factor. with a high-pass filter set at the specified lower limiting frequency for two hours duration. ²Sensitivity measured with 1 W input at 1 m distance on axis from the mouth of a horn with a Q of 6.3 averaged in the 2 kHz octave band. ³As specified by recognized standards organizations, sensitivity is measured with the driver coupled to a terminated tube. The JBL sensitivity rating represents the SPL in a 25 mm (1 in) terminated tube, using a 1 mW input signal (0.126 V into 16 swept from 500 Hz to 2.5 kHz. The sensitivity rating with a I W input would be 30 dB greater. Also can the box that houses each k33 be changed in size i.e. more depth than height and keep the same slot port dimensions as long as the overall volume stays the same? Any help on this would be very appreciated

I have owned both at the same time. I went from a full rf7 setup to a full lascala setup. As others have stated the rf7's have more bass and are slimmer, but that is the only thing the 7's have over the lascalas. The lascala to my ears is a more natural sounding speaker i.e they disapear once the music starts. I never got that feeling from the 7's. I always felt like I was missing something when listening to the 7's in two channel. Not so with the lascalas. Even turning my subs off the lascalas still provide enough bass for two channel. A much more natural bass. As others have stated listen to both if you can as they are totally opposite sounding of one another especially in two channel.

1080p was oversold to an extent but do not forget that all the 1080p sets I can think of have better contrast, colors, sharpness and the important other areas of performance over their 720p or 1080i brethren. Also to take full advantage of the new hi def formats you need a display that accepts and properly displays 1080p. Also re guarding the adoption of one format I agree, but competition drives down prices. Without two formats battling it out the price of hd dvd/ blurays players would have never came down as much as they have. The next format on the horizon is 4k which is a long way off for the consumer unless you have alot of money to spend. In closing hopefully lasers replace both led and bulbs.

Uncompressed audio from either format requires one of two items. The first is an receiver/pre pro with multichannel inputs which would also require a hd dvd or bluray player with analog outputs. There are a few players that have the outputs. The next and best choice is to upgrade your receiver/ pre pro to one of the latest models that accepts hdmi audio either pcm or bitstream. Myself I bought an onkyo 875 and have not looked back.

I own both formats and will be picking up an hda2 for the bedroom, another one for my dad and one for my father inlaw. The a2 is a great player and does a very good job of up converting standard dvds. At $98 it is a great deal and you also still get the five free movie rebate offer from toshiba.