Don Richard
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Posts posted by Don Richard
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An electrical supply house or this on-line dealer has what you need:
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On 5/17/2019 at 5:30 PM, glens said:
Obviously the best solution would allow the driver(s) to be connected directly to the output of a final gain stage with all leveling and shaping occuring upstream. But for good-enough results with passive components between the amp and driver(s) it's my contention there is going to be negligible power and/or driver control loss.
For a simple first order crossover losses will be small. However a fourth order passive crossover with EQ for a constant directivity horn may require attenuation to achieve flat frequency response, the amount of attenuation depending on the sensitivities of the drivers and their impedances.
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On 5/11/2019 at 1:17 PM, glens said:
What do you figure typical high-level crossover losses to be, as much even as 1 dB?
That would depend on the amount of attenuation used for each passband, plus component losses. In cases where a high sensitivity compression driver is used with a direct radiator bass cabinet, attenuation losses could exceed 10 dB. Component losses depend on the quality of the crossover components, the order of the crossover, and driver impedance.
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Years ago a friend visited the studio that recorded Kansas' Leftoverture album. He had the engineer make a 1/4" 7 1/2 ips copy right off of the master tape they had on file. I compared the vinyl album and the CD to the tape and found the CD to be nearly indistinguishable from the tape, while the vinyl played on two different turntables wasn't as clear as the tape.
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On 5/4/2019 at 8:41 AM, Chris A said:
I don't believe any Klipsch drivers (except an outside chance the consumer-grade direct-radiating subwoofers with very heavy cones and very compliant suspensions that would be subject to resonances during transport) would have any issues
One thing I have always done is to short the input terminals on the crossover, or the terminals on a bare driver when moving or shipping loudspeakers. This will damp cone movement if things get rough. Drivers used to be shipped that way but I haven't seen it done lately.
I would lay the speakers face down if possible, with padding underneath.
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Aaand, at the other end of the spectrum, many musicians today are using digital modelers which allow the performer to replicate any guitar/amplifier combination. For stage use, they use FR/FR loudspeakers (Full Range Frequency Response), essentially PA speakers, for monitoring. Here is a video with Mick Hughes, sound engineer for Metallica, explaining how he was expecting to hate this setup but fell in love with it once he tried it:
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I've used adhesive backed foam weatherstripping from Home Depot/Lowes for years, matching the size to the original gasket.
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When using true biamping (crossover ahead of two amplifiers) passive crossover losses are eliminated. As a result, 45 watts on the bass and 25 watts on the high frequencies sounds louder than the 70 watts total amplifier power would suggest. This also applies to triamped and quadamped configurations.
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There are miles of aluminum wire used on high voltage transmission lines that connect the electric company's generators to your home. Hundreds of feet of wire from the utility pole to the wall socket with transformers, circuit breakers. and connections in between. But a 6 foot power cord makes a big difference? Smells like bullshit to me🙄
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On 4/22/2019 at 3:38 AM, Islander said:On 4/20/2019 at 2:56 AM, garyrc said:
It looks like The Absolute Sound didn't see fit to mention Klipsch's presence. I didn't notice any horns in TAS's <$20K section.
On 4/22/2019 at 3:38 AM, Islander said:Well, that’s poor audio journalism. Did Stereophile mention Klipsch?
I have no idea if Robert Harley is still editor of TAS or not but he has a bias against horn loudspeakers, and the editorial direction of TAS reflects that. TAS offers only subjective evaluations of audio gear with no objective tests at all, unless they have changed since the last time I looked at a copy of their magazine 10 or 12 years ago.
Stereophile is the better of the two publications IMHO, with objective test results and subjective evaluations of equipment, along with detailed explanations of testing methods for either type of evaluation. They seem less anti-horn and anti-Klipsch than TAS.
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On 10/20/2018 at 11:09 PM, Randyh said:
10 watts is not enough -we're in 2018 not 1950 -
The Schitt amp is 20 watts @8 ohms, 40 watts @4 ohms. The first 10 watts are class A.
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Is TAS still publishing? TAS is dead to me, so...
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5 hours ago, dtel said:
'It's strange anytime I walk into a different house just out of habit I look to see how I would set up speakers in it, so I completely get picking a new house to fit speakers.
I do the same thing mostly out of habit, and did the same thing when renting or buying houses. Even did some slight remodeling to fit the Khorns in one place I had.
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We had some furniture that had damage where the legs had been dragged on the floor and had become dented/chipped. The furniture repairman used something that looked like Crayons, which he melted and blended to get the color to match. He then filled the damaged area with the melted substance and smoothed it after it had hardened. He simulated the grain pattern by using a darker "crayon". The repaired area was a perfect match.
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Keep listening! Music has a healing effect and will help your recovery.👍
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21 hours ago, ClaudeJ1 said:
A simple square wave input and monitoring the output on an Oscilloscope would tell the story about phase coherence!!
The Danley loudspeakers can output square waves over a wide frequency range, or so I've heard. Have you tried that on your SH 50s yet?
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Add my thanks for your work on MEH loudspeakers and for explaining clearly the "hows" and "whys" of the design. You have a gift for explaining highly technical things in a way that is easy to understand. Keep up the good work!
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I hear (no pun intended) the pro sound guys refer to "coherence". This refers to how the output of a loudspeaker compares with the input signal. When the phase and the amplitude are flat, and impulse response is clean, the speaker sounds more lifelike and measures better. This seems to describe what you report hearing and observing. A coherent speaker is better able to deal with noise and acoustic interferences, and will not suffer from polar pattern degradation as badly when the wind is blowing.
https://www.prosoundweb.com/channels/live-sound/tech-topic-coherence-reverberation/
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35 minutes ago, Islander said:
You may have noticed that the thick-cable fans don't call the thin-cable fans deaf, or clueless, or anything like that. In most cases, it's just, "This works for me. It may or may not work for you. If you don't like thick cables, nobody will insist that you buy any, or mock you for being satisfied with thin cables. Do whatever makes you happy. That's what I do."
I have 2 main issues concerning cables - false advertising by a lot of the sellers, along with exorbitant pricing. Any audible differences are accounted for by the measured inductance, capacitance, and resistance of the cable, and are generally small. Manufacturers that claim their cables cause dramatic improvements in sound quality are blowing smoke in an effort to promote sales, and overcharging their customers for what amounts to hookup wire. $1500 worth of room treatments will yield much greater sonic improvement than $75 worth of wire that sells for $1500.
There are decent cables available from companies that don't lie about their products, and don't charge a fortune for them. Blue Jeans Cables, Mogami cables, and Belden wire and cable are examples of respected companies that make quality products that won't break the bank, especially if you DIY. As far as audiophiles who spend a lot of money on expensive cables and completely worthless tweaks while ignoring simple acoustic treatments, I just smile and shake my head.
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5 hours ago, Jeffrey D. Medwin said:
I don't think its a matter of squeezing the cap, just its presence degrades and interrupts the " free flow" of the cap.
This is a ridiculous statement.
5 hours ago, Jeffrey D. Medwin said:I don't think
I agree.
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1 hour ago, CECAA850 said:
I'll bring the shaker.
I'm sure she has some sort of magnetic field around her.
I mean, I'm attracted for sure.
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35 minutes ago, oldtimer said:
I'll take the fifth if called.
I'll drink a fifth if they call me.
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55 minutes ago, Jeffrey D. Medwin said:
Your use and reliance of " logic, science & mathematical facts " leads you to mediocre results for audio playback in your home.
This is a stunning statement that leaves me at a loss for words.
best describes this statement, and I am certain if PWK were alive flashing that yellow button would be his response to your post smh.
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12 hours ago, Jeffrey D. Medwin said:
Marvel and larryk have reported hearing a difference in time alignment.
I have modified and time aligned my Khorns, and there is indeed a positive difference due to time alignment.
12 hours ago, Jeffrey D. Medwin said:I can probably hear a finer increment because NONE of you guys have my amps and through-system wiring .
The probability of an amplifier and wiring enabling a person to detect time alignment to within 1/64 inch on a home stereo system is virtually nil. Moving your head less than one inch changes the time alignment more than that, so the amplifier and wiring is irrelevant with regard to the ability to hear such a difference.
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What is your favorite Pro Amp and why??
in Klipsch Pro Audio
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They are copies of the QSC RMX amplifiers:
https://www.qsc.com/resource-files/productresources/amp/discontinued/rmx/q_amp_rmx_series_specs.pdf