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henry4841

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    Aric Audio 300B amplifier

    in 2-Channel Home Audio

    Posted

    45 minutes ago, Shakeydeal said:

    Why do you need big power on khorns when 5 watts will play louder (with excellent dynamics) than you can even stand to be in the same room? Not to mention the better sound quality a low power tube amp will get you over a SS behemoth.

     

     

    You can show someone on a scope that there listening level with horns never exceeds 1 watt and many will still say they think they need 800 watts. Not worth wasting my time on this forum trying to convince someone otherwise anymore. The KLF30 has a sensitivity rating of 102db after a quick google. That is with just 1 watt. Five watt amplifiers are more than enough with our horns. Bass is better with some SS PP amplifiers but it has nothing to do with their power rating but rather their design. Some designs have better control over the bass speaker.

    Output Transformer Secondary Impedance for Forte 1

    in Talkin' Tubes

    Pass Labs Wayne’s Preamp with Academy Audio Muses control

    in Garage Sale

    Posted

    A very nice linestage I have built and own myself though not as nice looking as this one. For those that do not know Wayne Colburn designs the linestages, sometimes inaccurately called preamps, for Passlabs. My understanding is a preamp has a phono stage. Check the prices for a linestage at Passlabs and you will be shocked at the prices his designs demand. 

     

    No affiliation with seller or his ability for diy but from all appearances and choice of parts it looks well made. Excellent design with all the circuitry one desires in a linestage. Not a cheap build for a diy'er by the way.  

    Dennis Had Inspire Amps – What to expect?

    in Talkin' Tubes

    Posted

    7 hours ago, SchuBagga said:


    I’m proud to say I have his 300 B inspire amp with western electric and I have a preamp 2030 on the way. I play them out of Denafrips Ares ii. 
     

    I agree with my sessions of capital W capital O capital W. The speakers are Cornwall Heritage iv. 102 db. 
     

    Western Electric 300B provide enough base so I can sell my SVS micro 3000. Tight welcomed bass… finally!

    Those WE 300B tubes NOS "new old stock" or new production?

    Woofer fuse for Klipschorn

    in 2-Channel Home Audio

    Posted

    Since you did not say what kind of speakers you have I am going to assume Klipsch. On my LaScala's I use a 1 amp quick blow which is readily available on Amazon among other sources. A 1.25 amp fuse is a specialty fuse that can be hard to find and over priced. I believe you are correct that Klipsch did recommend a 1.25amp fuse in their instructions when I bought my speakers but I have never had a problem blowing a 1 amp fast blow myself. Works fine. I would not operate my speakers without having them fused. Fuses are much cheaper than drivers or bass speakers. 

    Klipsch Cornwall 1 Midrange Horn Question...

    in Technical/Restorations

    Posted

    13 hours ago, Deang said:

    ^This. 
     

    Welcome to the forum Scott. 

    Hey Dean, you have been using the new approved Klipsch capacitors in your builds for a few months now but I have not seen you post your impression of them sonically compared to some of the other capacitors you liked in the past. Have you had a chance to listen to a crossover or two with the new caps in your LaScala's? Detailed review would be an asset to the forum. 

    Klipsch Cornwall 1 Midrange Horn Question...

    in Technical/Restorations

    Posted

    Not to give the wrong impression, I am not against replacing the capacitors in our old crossovers. Techs recap old electronic products to ensure the customer gets decades more use out of their equipment. The same applies to our speakers. Drivers and horns along with those quality woofers Klipsch uses will last longer than most owners. But if like the sound you are now hearing I still say leave them alone. But your speakers can and will sound different replacing the capacitors, perhaps brighter and more lively which may or maybe not be a good thing. I would be sure to get the old capacitors back from Dean just in case. When working for a living I never threw the old part away until I was satisfied with the result. 

    Klipsch Cornwall 1 Midrange Horn Question...

    in Technical/Restorations

    Posted

    12 hours ago, Scott Grammer said:

    OK, so while I have been working in audio electronics for a while (since 1977), I am the new guy here, and I understand my place as such. So I definitely would not like there to be a "capacitor war" on my account.

     

    That said, I believe there's a lot more to cap replacement in crossovers than "is the old cap really bad." Changing from bipolar electrolytics to film caps can change the sound of a speaker, and not necessarily for the better. Sometimes, a crossover designer will voice a speaker with a certain kind of caps (and inductors, as well) that have maybe a bit more than the minimum ESR (or DCR in the case of inductors). Replacing these with "better" components can change the sound of a speaker considerably. I have a pair of smaller Advents on my main workbench as test speakers, and a couple of years ago I recapped the crossovers (it was necessary, the caps were seriously leaky) and I replaced the bipolar electrolytics with thumb-sized Nichicon film caps. This got rid of the excessive midrange reaching the fried egg tweeters (which is why I checked out the crossovers in the first place), but the VERY low ESR of the Nichicons made the top end brighter than normal. I've gotten kind of used to it, but at first it was bothersome. I may still add some 1 ohm resistors in series with the tweets to tame them down. That is, if I ever have time to fool with it....

     

    The Cornwalls I have include what I believe to be the original oil caps. They tested well, and they're not physically leaking oil (and yes, you DEFINITELY can smell it when that happens), so I don't plan on replacing them any time soon. I don't think they're the root of the problem. I will be replacing the horn gaskets soon with some supplied by a friend who used to build PA speakers, and we'll see what that does. I just have to get them - and some time - first.

     

    Hey Scott, did you know that the late Roger Modjeski said at the Burning Amp Festival almost a decade ago said that sonically he sees nothing wrong with an electrolytic capacitor. He also said if it were not for the tiny amount of leakage all electrolytic caps have he would have not problem using one for a coupling cap in a tube amp. Shocked me when I first heard him say that but at one time big electrolytics were used on the output of many amps and receivers. Nelson Pass still has projects that use a big, talking 10Kuf, on the output of the power transistors blocking DC getting to the speakers. Changed my attitude towards electrolytics in the audio path.

     

    What I have found restoring and recapping many old receivers from the past is heat is the enemy of capacitors. I always make it a point to check every capacitor I take out recapping and most test within tolerance and still work fine. The problem ones are always on the board that are upside down inside the amp or receiver trapping heat. They are almost always bad. Naturally there is always a failure of any component in an electronic device including capacitors sometime. 

     

    Just a note on why products from Passlabs have capacitors that last for decades. IMHO that is. Companies like Nelson's use quality caps rated well above what they will ever see as far as voltage or watts never stressing them. That and keeping the inside of the product as cool as possible also contributes to long life. Very little average current is passing through a Klipsch speaker crossover. On an average of only a few watts at most. Most are out in the open where heat is not a big problem as well. Other than leaking oil most are not what a tech would call bad and will still function fine. 

     

    One thing for sure though, changing capacitors will give you a different sound. Most say their speakers treble is brighter after doing so. Klipsch is now offering polyester capacitors for those desiring new capacitors with J&M and Dean selling and replacing them.  For Klipsch crossover replacement or recapping Dean is the man to see. 

     

    Getting back to what you perceive as a problem it is hard to believe there is something wrong with your drivers or horns along with your crossover capacitors testing OK. That is the reason I say your room or the amplifier you are driving them with could possible be the problem. Many times I have thought I had a problem during a test when it turned out to be my method of testing was not correct. Just saying. Do you still think the problem is in the speaker itself? You may want to throw some new film caps in just to see. Like me you probably have some in stock. Would not take must time and you never know. We cannot test everything that the ear hears. 

     

    I am really happy to see another electronic guy on this forum. Look forward to learning from you and sharing our experiences. At one time I did make a living with electronics but not in the audio field. Except for a short time repairing car radios early in my 20's. Electronics now is just a hobby to pass some time doing something constructive in my old age, 74. 

    • Like 1

    Klipsch Cornwall 1 Midrange Horn Question...

    in Technical/Restorations

    Posted

    1 hour ago, Deang said:

    A 50 year old motor run that is sweating oil should be replaced. Doesn’t matter how it measures. You don’t have to see it, you can smell it. Also, since when is a 50 year old motor run an example of a “modern day film cap”?

     

    There is a good ohm difference between the oil cans in series versus new axial wound dry polyesters. It’s audible. Well, unless you’ve lost a good deal of your high frequency hearing. 

    When I was referring to modern film cap I meant the sealed ones instead of the old wax capacitor one sees in really old equipment. Nelson Pass made a comment on a technical forum that he recently tested the capacitors in one of his 40 year old amplifiers and they all tested fine. And the majority are electrolytics. Just saying. 

     

    Do not mean to step on your toes Dean but as we both know we do have a disagreement on capacitor replacement. I understand your position on this forum as a long time member building and selling crossovers. Just a friendly disagreement and nothing more, I hope. I am just from the old school if it ain't broke do not try and fix it. I certainly do not want this thread to get into another capacitor debate on this forum. They seemed to always end bad. The forum has seen plenty of that over the years. 

    • Like 1

    811A Based SET?

    in Talkin' Tubes

    Posted

    A push pull tube amp will get you real close to the number you are looking for. For instance the Dynaco ST-70 or a McIntosh tube amp as examples. The majority of SET amps are in the range of 6 watts give or take a few. My friend of mine who runs a vintage audio shop was skeptical about a 6 watt amplifier having enough power until I hooked it up to his setup with a few speakers to demonstrate. Passed with flying colors as far as enough volume. 

    811A Based SET?

    in Talkin' Tubes

    Posted

    The late Roger Modjeski played with those transmitting tubes building audio amps with them but no easy task. He talked about it in one of his presentations at the Burning Amp Festival years ago. I believe it was a SET amplifier and I am sure it made plenty of power. The heat will be tremendous though in a home environment if you can find someone with Rogers talent to build it. You will be dealing with extremely high voltages. In theory I suppose it could be built but not many could do it. Anyways if attainable it would way more power than we would ever need with our speakers. 

     

     

     

     

    Older vs newer Klipsch, new member.

    in 2-Channel Home Audio

    Posted

    How many of us have had their ears ringing days after attending a concert?

     

    Been there, done that in my younger days. My hearing is still good from all accounts and I am still told my music is too loud but not to the extreme anymore. I can enjoy my music with a good amp with a large soundstage at a much lower volume now. Big sound at a lower volume does work with the right amplifier. Many have never experienced this and have to crank the volume up before they fill the room with their present amplifier. 

    • Like 2
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