Marvel

OK Russ, just for you, so you don't think we're ignoring you. [bs] I'm not really saying it's BS... My lamp cord is serving me well []

Power handling: 100 watts RMS/140 watts max * Voice coil diameter: 1" * Impedance: 8 ohms * Frequency response: 200-18,000 Hz * Magnet weight: 40 oz. * Fs: 140 Hz * SPL: 92 dB 1W/1m

I thought they were some new kind of wooden hat... Very clever how you had those in the background shot of your saw, btw. Just waiting to see if anyone noticed... [*-)]

Peter, Try setting the gain on your preamp where you would normally have it set. Turn the power amp gains all the way down. Power up your system and put on some music... and turn up the power amp to the place where you like it. You may not hear any hiss, and it may not be turned up very far. I only have my Alesis at 2/3, and it is only 75wpc into 8 ohms. With the music stopped, I can't hear anything coming out of my tweeters (CT125) Bruce

Later on he deserves some credit at least in the psychedelic years. If you want to go that far the EMI staff and engineers deserve as much credit as George Martin. If I remember right the EMI engineers filed for 4 patents based off of what the beatles asked for in those later sessions. But George Martin did all those wonderful string and orchestra arrangements.

If you decide to add a solid state EQ unit in between your preamp and amp, please keep in mind that the majority of tube gear needs to feed a high impedance input (47k-100k ohms). Many pieces os SS gear have an input impedance that it too low (12k-20k), and you end up with a filter that rolls off the bottom end. The output of most SS gear is very low, so it will have no problem at all in driving the power amp. Bruce

I don't remember the brand but a few years ago there was an acoustic guitar amplifier that featured a spruce speaker.Basically a spruce guitar top in a cabinet with a voicecoil and magnet structure attached. Was supposed to sound very nice but I never got a chance to see one in person. It was a High Cliff Soundboard HC-125 andlisted for about $1200.

Hey Bruce, Don't tubes like the rain?? They don't mind the rain any more than the SS gear... [*-)] The two events aren't really related. I just wanted to swap in the SS for a while.

Well... it's raining here in North Georgia at the moment, too. But I swapped out the 3.5 watt 2A3 amps and put in one of my 75wpc SS amps, and have Bela Fleck and the Flecktones playing right now. NICE! (Not as spacious as the tubes, but nice anyway.) ...and I work on Monday, since all the students are back and the college has classes. []

My guess is that you won't find many knockoffs. They are too difficult a speaker to build. The closest commercial speaker is the Speakerlab K, and, depending on just which version, are pretty close and very good in their own right. DJK put it this way when someone asked about building a Khorn: 57 trapezoid shaped boards some with compound mitre angles. About two gross of screws and nails on edge sometimes at an angle into 1/2" plywood. They aren't for the faint of heart to build. It also means you won't find a lot of them on the market that aren't real Klipsch. I've only heard a pair of the 60th Ann. Khorns, while visiting the Klipsch HQ. Great sound... really great sound! But I already own my LaScalas. [] I could live with them and never change, even though there are better systems out there. Bruce

NIce! The stock ones have some rather sharp edges on them.

I recently tossed my '72 JVC integrated, 35wpc. It was very nice, but I had some issues with it and I couldn't track down fixes. It even had circuits on plug in cards with edge connectors, whcih I thought was pretty cool for such an old piece. The phone section was nice on it too. I hated to let it go, but I didn't need something else around here to fix.... someday. Bruce

They're just a bunch of clucking idiots! [:|]

I have a pair of the horns, courtesy of jwc, but they are still black. They probably won't stay that way, though.

I am still rather partial to my JBL 4311s, and they aren't even really near the best of the JBLs. Still, at 89db, they were far more efficient than anything else I had ever owned, and a lot of albums were mixed on that model. We have become snobs, and not necessarily for the right reasons.

I am JEALOUS! that would be sooooo nice to hear, Larry. Wish I would be able to go, though entirely out of the question. Bruce

Of course your living room is bigger, now that you moved out of that chicken coop. [*-)]

Can't you email the pics from your phone to yourself? What brand of phone do you have? I got a thrid party piece of software (free) for my Sony Ericsson, that let's me do more than the regular Sony software. Bruce

[8-)]

I haven't seen that for a long time. Right in the middle of the addition of the HT room, too. Isn't that Walker's house in Canada?

Original text from Dennis: The taper rate of a LaScala is 100hz,The mouth area is good for 125hz. Below this it is a big woofer in a small sealed box.If we plug the T/S parameters for the K33E into a box program we will see that the Qtc=.85, the Fc=82.5hz, and the F3=70.9hz. If we close in the back of the high frequency cabinet and open the woofer rear chamber up into this volume and fill with fiberglass we now have Qtc=.577, Fc=58.2hz, F3=73.6hz . Bessel=Qtc.577=D2 gives the best transient response and the least group delay of all the sealed boxes.At 30hz the Qtc=.577 has 4.5dB more output than the Qtc=.85 . Compared with sealed enclosures,the transient performance of the best vented enclosure is worse than the best sealed box enclosure.Since we have made great gains in performance some may elect to stop here.But please read on.The next step is to port it. The K33E is not the optimum woofer for this but it works pretty good. With the box size optimized for a D2 we can port the stock woofer to an SC4.The transient response of an SC4 while not as good as an SBB4(more on this later)is better than the more common QB3. Unequalized the F3=49hz and has 3dB more output at 30hz than the D2. The response curves are parallel with the D2 the only difference being the Fc being a half octave lower with the SC4 and the output being 3dB higher from 30~70hz. The output of the SC4 does not drop lower than the D2 until you go below 17hz. Again this may be a stopping point for some. But by adding a simple two pole high pass filter ahead of the power amp we can now have a C6 with a -3dB point of 31hz. Since this is the Fb of the system there is no increase in cone excursion or distortion. The filter consists of a cap, an inductor and a pot. The pot allows adjustment at Fb of +/- 3dB. This is similar to being able to change the Qtc of a sealed box from .5~1.0 .If you think about it we have the choice between a D2,SC4,and a C6 in the same box by plugging the port and/or bypassing the eq. If you have a SET amp or simply want to get the most out of the LaScala you will want to upgrade the woofer to something with a lower Qts. The Klipsch K43E does the trick, as do the EV DL15W and the JBL 2205. The EV and JBL drivers require some minor network changes. The lower Qts drivers allow for an SBB4 alignment which has the best transient response of the vented alignments. With no eq they have 3dB more output at 30hz than the stock woofer. With eq we have a maximally flat B6 and the F3 of the system is 27~28hz. If using a solid state amp with the low Qts woofers a small resistor must be added in series with the driver to have the same Rg as the SET does. This mod can be backed out of a stock LaScala with no externally visible changes if you don't like it. No one has ever gone back to stock after hearing this mod.

These figures are from another poster. No eq boost in his amp, as djk mentioned. No idea of the measuring technique. ------------------------------------------------------------------------------------------------------------------------ My buddy Thermio and I both scratch built a set of LS bass cabs and he did the djk mod to them. He took measurements on one cabinet as the mods progressed. Here is the data: 200 160 125 100 80 63 50 40 31 25 20 HZ 77 80 79 73 72 78 68 60 61 52 51 dB Stock, mouth braced 76 78 78 73 69 75 65 60 66 56 52 4.5 cuft, no ports 76 78 77 75 74 80 70 60 68 54 54 Two 4"dia 10" ports 76 79 78 76 75 80 71 60 68 54 53 Ports cut to 7" The interesting thing with 10" ports is the boxes went deep, but the snappy, fast horn sound was lost! Cutting the port length to 7" brought the snap and speed back to same as stock, plus the lows remained, esp. at the 31Hz box tuning point. This data is with K33E driver and light stuffing. We think a K43E in this box would be superb, but haven't tried it yet. Neither of us is going back to stock. Pete

I would already have them home and be wiping them down, cleaning them up to see what they really look like. Any anomalies in the sound I would get to later. For me it's a no brainer. Bruce

They are bigger than Heresies, but then again... I have LaScalas. The Chorus IIs would not have the placement issues of LS. To me they weren't that large, taller to be sure, but the base dimensions aren't so large.They are all GOOD! [Y] Bruce

Chorus II, Chorus II, Chorus II..... [*-)] They will rock your world. I've heard Heresy, Heresy II and Chorus II.... Forget the Forte II, go straight to the Chorus IIs.