Can you give us your opinion now?
I'm in the process of replacing my CHP-70 pensil's and, with them, after 200hr I was satisfied, after 4 years they are wonderful.
Jorge
All of the Alpair paper driver have a huge distortion spike at ~500Hz. This distortion spike is not present in the comparable metal drivers. My ears won't adjust for it, so I have A10.3M's in the HT and A7.3(M)'s in the 2-channel.
Bob
Bob
Mr Brines
Does that spike apply to the A12P as well? I was considering using it,and there is no metal version
Thanks
Does that spike apply to the A12P as well? I was considering using it,and there is no metal version
Thanks
Not something I've really noticed before with either 6p or 12p. I downloaded a couple test tones on the old 'puter, and hit my P10 treated 6p's. There's definitely a bit of ringing at 500Hz, but not anything to get too concerned about. Both my 6p's and 12p's have had Dave's magic Enable treatment, so maybe that's got something to do with it. I've heard stock 10p's and don't recall hearing any issues with them.
jeff
Bob,
In your charts, the Alp 12P has THD in dB values and the Alp 10.x has it in % - any tips for the less knowledgeable folks on how to compare both?
In your charts, the Alp 12P has THD in dB values and the Alp 10.x has it in % - any tips for the less knowledgeable folks on how to compare both?
The two graphs are actually on the same scale. Only the labels are different. 1%=-40dB 0.1%=-70dB. You can figure out the rest by comparing with the phase scale on the left.
Bob
Bob
I was curious about the "evolution" of the A7p's because of my experience with the CHP-70 was that it took them years (more than 2) to mature.
Do you know what causes the spike in distortion at ~500Hz, does it increase gradually with amplitude or is it sudden and severe?
It's close to the inbuilt ~480Hz BSC, does it have anything to do with the distortion?
Also, does anyone know what mechanically causes the boost below 480Hz which compensates for baffle step loss?
It's close to the inbuilt ~480Hz BSC, does it have anything to do with the distortion?
Also, does anyone know what mechanically causes the boost below 480Hz which compensates for baffle step loss?
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I bought David's prototype A73-en in beautful cherry cabinets by CHris----have gotten past about a month of playing them, and have a couple things to say about the A7-3 aluminum speakers. I attended a Seattle Symphony concert last night, Beethoven 4th and Mahler 1st, brilliantly played and conducted. I have a SACD rescording of the Mahler by Tillson THomas and the SAn FRan orchestra. With the live performance fresh in mind, I listed to the mini-fonkens, and was struck by the versimilitude of the sound---the speakers excell at low-level micro-reolution, there is a passge where the harp plucks just a couple notes in a rather dense wave of full orchestral sound, it was beautful present at just the proper level, and sounded like a harp, not like some pizzicato from a cello. Brass is rendered wonderfully, and the triangle in the climaxes was just right---bright but not tizzy or muted. I listened closely to the triangle last night at the hall, just for comparison. The Alpairs did perfectly. I have a good sub; the string basses, which provide such a solid foundation in the Mahler, were well resolved, but 4inches of speaker and a 10inch HSU sub do not really provide the sound that 100 musicians in a first rate hall put out. I loved the rendering of bassoon and oboe, the differences in harmonics and the "woody" sound of the bodies of the instruments were clear and extremely musical.
All in all, I am very happy with the Onkens!! With good source material (first rate SACD) the really make music, resolving at least as well as my Magneplanars, with better dynamic contrast, especially at low volume, or in really quiet passages. There are some places in the second movement of Mahler's 1st where the tympani is barely struck, and this came off brilliantly in the recording through the Onkens. What a bargain!! Thanks for letting me use so much bandwidth!! Now to get, or make, a good EL84 amp.
All in all, I am very happy with the Onkens!! With good source material (first rate SACD) the really make music, resolving at least as well as my Magneplanars, with better dynamic contrast, especially at low volume, or in really quiet passages. There are some places in the second movement of Mahler's 1st where the tympani is barely struck, and this came off brilliantly in the recording through the Onkens. What a bargain!! Thanks for letting me use so much bandwidth!! Now to get, or make, a good EL84 amp.
I have a good PP EL34/KT88 amp, the response Audio Bella Extreme 3205. But I liked David's EL-34 better!!
That amp is essentially a highly modified (can you say organ donor) Dyna Stereo 70 - with new driver stage ( Dynamutt) by Greg the Geek at Classic Valve Design: Audio Design Where It Matters - Sound!
A very nice sounding piece, but due to the vagaries of recycling 40+yr old mechanical parts such as tube sockets, prone to prima-donna behavior, in fact she blew one of the output tubes during our demo, but fortunately we had a stand-by TubeLab SimplePP EL84 with which we could limp along. After vacillating between Triode and Pentode mode, I've settled on the latter, as the extra power comes in handy when driving less sensitive or multi-way systems
A very nice sounding piece, but due to the vagaries of recycling 40+yr old mechanical parts such as tube sockets, prone to prima-donna behavior, in fact she blew one of the output tubes during our demo, but fortunately we had a stand-by TubeLab SimplePP EL84 with which we could limp along. After vacillating between Triode and Pentode mode, I've settled on the latter, as the extra power comes in handy when driving less sensitive or multi-way systems
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Headroom in an amp is good to have!! That was a really nice experience, thanks for making your home available.
???
Hi.
I just want to say a couple of things.
While I searching Drivers to buy, I read comments about The Driver and watch all the Youtube videos includes this Driver.
I know the rule:
Listen them in your System directly.
But not everyone has this oppurtinity..
When I read comments like you did, I really give up to buy the Driver I am searching.
Another comment about alpair 12p:
MarkAudio Alpair 12P 8" Paper Cone Full Range
"I'm using these on an open baffle; actively crossed to an H Frame subwoofer.
These are smooth detailed transducers. Very revealing- an @2000 hertz whining sound was coming out of them, unnoticed previously in my Neo10/ Neo3 pairiring."
He also says very good things about them..
And also we don't know him,maybe he made mistakes on The setup or The Drivers need more clean amplification.Really I don't know.
----
I am talking about this because I want from you(and others have this Drivers) talk more about this Drivers..
Can you talk more about this Alpair Paper Series??
It is really important For not have oppurtinity to listen this Drivers
.
Thanks..
Hi.
I just want to say a couple of things.
While I searching Drivers to buy, I read comments about The Driver and watch all the Youtube videos includes this Driver.
I know the rule:
Listen them in your System directly.
But not everyone has this oppurtinity..
When I read comments like you did, I really give up to buy the Driver I am searching.
Another comment about alpair 12p:
MarkAudio Alpair 12P 8" Paper Cone Full Range
"I'm using these on an open baffle; actively crossed to an H Frame subwoofer.
These are smooth detailed transducers. Very revealing- an @2000 hertz whining sound was coming out of them, unnoticed previously in my Neo10/ Neo3 pairiring."
He also says very good things about them..
And also we don't know him,maybe he made mistakes on The setup or The Drivers need more clean amplification.Really I don't know.
----
I am talking about this because I want from you(and others have this Drivers) talk more about this Drivers..
Can you talk more about this Alpair Paper Series??
It is really important For not have oppurtinity to listen this Drivers
.
Thanks..
Bob here is another observation.It looks like your findings:
Mark Audio Alpair 10P-A Fullrange Loudspeaker Measurements Data and Information Full Range
"The second, third and fourth harmonic curves measured at 2.83V input RMS. The distortion above 1kHz is extremely low, but something really is going wrong at 550 Hz..."
...
Mark Audio Alpair 10P-A Fullrange Loudspeaker Measurements Data and Information Full Range
"The second, third and fourth harmonic curves measured at 2.83V input RMS. The distortion above 1kHz is extremely low, but something really is going wrong at 550 Hz..."
...
Hi.
1-Can you give us better explanations about this "counts"?
2-Bob Brines indicates ringing at about 500hz for all alpair paper series.
And rutcho.com indicates weirdness at about 550hz for alpair 10p.
Vinylkid58 says in this
"Not something I've really noticed before with either 6p or 12p. I downloaded a couple test tones on the old 'puter, and hit my P10 treated 6p's. There's definitely a bit of ringing at 500Hz, but not anything to get too concerned about. Both my 6p's and 12p's have had Dave's magic Enable treatment, so maybe that's got something to do with it. I've heard stock 10p's and don't recall hearing any issues with them.
jeff"
So your EnABLed treatment can be solution for this???
3-While I was reading descriptions about all alpair paper series madisound,they say:
-typical audiophile low frequency loads(non constant low frequency loads)
-non linear bass load for excursion mechanism.
-only designed to handle non-linear "peak shock" loads, for example the brief roll of a drumbeat.
-alpair6p xmax:5mm for optimum movement,loads NOT exceeding 3mm is within its capability for a period not exceeding 1.5 hours.The normal driven movement should remain inside 2.6mm.
==>>So what are the sentences mean actually?
Which songs should not I listen with them?(or which songs how much time 🙂
4-we755a has circles on the cone.
Can these have same function with your EnABLed treatment??
Thanks..
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