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Posts posted by JohnA

  1. Yeah, in general all tube amps produce more even order distortion and less odd order distortion, with SS tending to do the opposite.  Yet, all good amps will produce so little distortion, none should be audible. 


    My first CD player, in 1983, was a marvel in most ways, but also had an edgy, brittle or crunchy sound in the background.  All of my modern disc players have lost that.  Perhaps the D/A converter in your digital source is not doing a good job.  I'll also recommend you look at a good disc player that can decode 24 bit/192 kHz and higher sources.  24/192 retired my Thorens TT. 

  2. On 1/10/2024 at 4:39 PM, Benbanksy said:

    I'm picking up a very nice pair of original, consecutive Klipsch Chorus I's (no modifications or upgrades). I'm going to put these in a 500 sq ft space right now.  I have the following receivers/amps (and wpc at 8 ohms):


    • Marantz PM8006
      • 80 wpc
      • My go-to right now
    • Carver HD772
      •  140 wpc
      • I will need to repair, as it just stopped turning on... I think it's a straightforward fix
    • Sony DA4400ES home theatre receiver
      • 120 wpc
      • Got free. I don't love the sound from this unit. 
    • Two Niles 1230 12-channel amp
      • 80 wpc when bridged
      • Got free. Not sure if I can configure for more power output. Have not set up yet.
    • Linn LK100:
      • 50 wpc 
      • Got free. Have not set up yet.


    Unfortunately, from what I've read perhaps everything except maybe my awesome Carver would a poor fit for these speakers. 


    1. Will the Carver receiver or any of the above be sufficient for showcasing these speakers?
    2. Will they sound "bad" on the PM8006 when played a reasonably lower levels for regular listening?
    3. Would I be better off selling everything and getting a single really nice high powered amp? 






    They can't put anything on the internet that isn't true!


    At 101 dB/w/m, you NEED 20 watts (108 dB peaks at 4m/13 ft), 50 would be grand.  I'd use the Marantz.  It should be smooth and sweet with your Chorus.  I have not heard one, because it's black.  I will wholeheartedly recommend any of Yamaha's receivers or integrateds that come in silver, the upper end of the range.  I love the sound of my R-N600A driving my H IVs. 

    • Like 3
  3. On 1/11/2024 at 5:42 PM, Deang said:

    If your plan is to gut them, the cabinets would be practically worthless. I can’t imagine anyone paying for them with no drivers or crossovers. 

    if you are tight with money, the answer is definitely not destroying a perfectly good set of loudspeakers. 


    They were designed to be used as stage monitors and have a strong vocal presence. Converting the networks to the AA will rebalance the loudspeakers. It will pull the midrange back so you can hear the bass. 




    OP, don't modify them until you get them working and you listen to them for a while.


    Actually the Type HIE is a Type AA with the woofer cap changed to raise the Woofer to squawker crossover point for the K-700 horn. 

    https://products.electrovoice.com/binary/EVM-12L Series II EDS.pdf

    From the graph in this spec sheet, you can see the woofer has a rising curve and hits about 102 dB/w/m around 3k Hz.  Klipsch voiced this speaker for outdoor use (and there it sounds great).  The squawker and tweeter are run at 104 dB/w/m.  A hybrid crossover more like the Type E will voice it more like a home Heresy and make it better for indoors.  However, that rising woofer response curve may need a steeper low pass filter.  This is a DeanG job. 


    I had a similar pair of HIPs (same crossover and components).  They were ported and still pretty bright.  @ClaudeJ1 may be able to help you design a port to extend the low bass limit to home audio limits.  He likes that woofer for that.  He has developed a mod for the Heresy cabinets with that woofer and a port and a corner that you might like.  Otherwise, that woofer is popular with guitarists and not suitable for a home edition Heresy. 


    • Like 2
    • Thanks 1
  4. On 1/10/2024 at 5:16 PM, Speedbird84 said:

    A big thanks for letting me join the forum.


    Sadly my Father recently passed away and the family has been trying to decide what to do with all his beautiful stereo equipment.


    I have a set of Cornwalls that i believe he purchased new in 1976....CD-BR 7N289 and 7N290.


    They have actually sat unused probably since the mid 80's.....never opened up or modified.....completely original. I did hook them up to the Pioneer SA9100 a few weeks ago and they still sound beautiful to me.


    Am just looking for any feedback on them and what they might be worth .






    These prices are a little dated, but close.  I would classify the plain, decorator version as grade C. 

    Klipsch Heritage used prices ver 2021-08.xlsx

  5. Crossover repairs are generally easy because of the point to point wiring design.  Schematics are available on the forum. 


    K-77-M diaphragms are not normally sold in pairs.  Beware of eBay sellers that sell poor performing copies.  You MAY need one, buy one.  My 2nd La Scala pair cost me $500, years ago, because a loose wire in the crossover kept a driver from working.  They were Type AL and I replaced the crossover fairly soon.  The K-55-M squawker drivers are good ones and are unlikely to be bad.  You'll just have to get a multimeter and test.  However, apparently a K-55-V/PD-5VH diaphragm can be slightly modified and fit if necessary.  The K-55-V/PD-5VH is still in production. 


    I also suggest Type AL-3 crossovers. 


    I doubt they are available anymore, but new grilles to change the color for my second pair were quite inexpensive (~ $20 each).  They are held on with Velcro. 

    • Like 1
  6. 10 hours ago, Cacti said:

    I've read that the Heresy IVs frequency range is 70Hz to 17kHz, but it sounds to me like it rolls off at about 10k. I'm wondering if this is normal or is it because of my (not so great) amp?


    Klipsch claims 48 to 20k Hz.  Mine are solid down to the 49 Hz G.  Bass below that to E, is still good.  I don't hear over 14k, but mine are not deficient up to there, anyway.  I'm running a Yamaha R-N600ASL and before that a Technics SA-300. 


    Wherever you read 70 to 17k was wrong. 

  7. XLR/balanced cables are a technique for cancelling noise in long cable runs, especially in high gain circuits like microphones.  Nothing else to it.  Depending on the EM environment around your system, they may or may not reduce noise over RCA shielded cables.  They will not make things worse.  Try them.

    • Like 2
  8. On 1/2/2024 at 9:44 PM, richieb said:

    Not a broadcast tube but the Russian 6C33 military based tube is a formidable candidate.  ....... An amazing triode capable of 45 watts + - running in parallel, 2x each mono. Rugged as hell, hotter than hell, once and maybe still used in MIG fighter aircraft. .....


    That is just the thing I was looking for.  So, 2 tubes, run in parallel as SET can make 45 watts?  I did not know SETs could be paralleled, thus the question about broadcast tubes.  And I was curious as to whether a broadcast tube could sound good. 

  9. They're not Klipsch.  They have elements of Al Klappenberger's Universal, but the 48 uF woofer caps throw me and I'm not seeing all the circuit connections in your pic. 


    What does the front and rear of the squawker horn look like?  This could be the product of a carpetbagger that moved to Baxter (?) TN to build Klipsch "upgrades" and similar speakers.  I can't remember his name, now. 

    • Haha 1
  10. Why isn't/couldn't high power broadcast tubes be used to build a high output SET amp?  Say 50 watts from a 3-500xx?  I still think 50 watts of good power is what Heritage speakers ought to have. 

  11. On 12/29/2023 at 1:36 AM, Flevoman said:

    Perhaps your question is a bit too open-ended. Are you expecting everyone to post an extensive list of tubes along with an explanation of how they sound? Or do you mean which tube sounds most pleasant in their system and why?


    Not single-ended?

    • Haha 2
    • Confused 1
  12. That receiver is probably putting out 40 watts, or so, per channel with all channels driven, so you might well use more power, though I doubt you NEED it.  Look at 5-channel power amps from Acurus, Parasound, Integra, Emotiva, Marantz, even Rotel.  Stay under 150 watts/channel, because your speakers can't handle more and these brands will be under-rated. 


    Also, remember, double the power and get 3 dB more per speaker.  Three dB is a just detectable difference under loud conditions.  Meaning, even 150 w/ch will not add a shattering increase in loudness (not quite 6 dB).  But that increase may require more subwoofers in order to maintain balance. 

    • Like 1
  13. I'll recommend you look at Yamaha integrated amps and receivers that are available in silver (the better quality ones).  I am initially quite pleased with the smooth, relaxed sound my R-N600ASL is producing through my H IVs.  It replaced a rebuilt 1979 Technics receiver, that was good if not pushed.  Also have a look at Marantz and also Emotiva, like the BasX TA1.  You do not need more than 50 watts.  You might be surprised at the sound of new amps as Soundcraftsman amps had a reputation for high distortion in the 0 to 5 watt range, where you will operate when you are not damaging your hearing.  What I remember is that by 10 to 20 watts they were said to be sounding pretty good. 

    • Like 1
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