First listening test with brand new drivers in a 14 liter Golden Ratio box. B15xH39xD24 cm inside.
A little brighter than with 10Maop but it is marginal. Nothing that stands out, but it feels like a properly balanced sound. Between 10Maop and Alpair 11MS in terms of the tweeter level.
Maybe I'll wait a week or so before I've recorded these.
It may happen that they soften over time.
The midrange feels good.. The bass is there.. I'll try different lengths of the bass tube.
So I'll report back when I've listened a little more. Started with dia 32 mm x L16mm.
A little brighter than with 10Maop but it is marginal. Nothing that stands out, but it feels like a properly balanced sound. Between 10Maop and Alpair 11MS in terms of the tweeter level.
Maybe I'll wait a week or so before I've recorded these.
It may happen that they soften over time.
The midrange feels good.. The bass is there.. I'll try different lengths of the bass tube.
So I'll report back when I've listened a little more. Started with dia 32 mm x L16mm.
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Nice one. and well done. Yes, they do change for sure. I was informed to run them at a very low volume for around 10 hours by Sound Imports. Which has now elapsed for my pair. I look forward to hearing your views
Thanks, I'm really interested in the results. This driver seems to have notably high praise, albeit with few data points
It's really interesting how consistent the response curves of the ~5" CH series drivers (CHN-110, CHP-90, CHR-90) are on paper:
Looks like a clear vision and some serious engineering to get there! Overall the ~5" CH drivers seem to be rather well liked. The CHN-110 (the bass monster of the family) especially has been described as almost (but not quite) as good as the Alpair 10.3; lacking a little bit in the finer details. CHR-90 seems to be a solid driver, though one that doesn't really appear to stand out. Really interested to hear if the CHP-90 can continue to live up to the praise it has been getting.
For what it's worth, there's much more variation around the ~5" Alpair and pluvia lines; the metal ones (Alpair 10, 11MS, Pluvia 11) look intentionally less flat than the above, with an added boost for higher (>7k or so) frequencies.
It's really interesting how consistent the response curves of the ~5" CH series drivers (CHN-110, CHP-90, CHR-90) are on paper:
Looks like a clear vision and some serious engineering to get there! Overall the ~5" CH drivers seem to be rather well liked. The CHN-110 (the bass monster of the family) especially has been described as almost (but not quite) as good as the Alpair 10.3; lacking a little bit in the finer details. CHR-90 seems to be a solid driver, though one that doesn't really appear to stand out. Really interested to hear if the CHP-90 can continue to live up to the praise it has been getting.
For what it's worth, there's much more variation around the ~5" Alpair and pluvia lines; the metal ones (Alpair 10, 11MS, Pluvia 11) look intentionally less flat than the above, with an added boost for higher (>7k or so) frequencies.
Oh great! you finally test it and trying to compare!
Still not fully satisfied here, maybe I'll try your box!
At the moment, the difference with the MAOP10 at my ears is huge! being the MAOP clean and balanced while the CHP-90 is too bright as you said and I can't hear any good bass :/ To have a rather decent sound have to put the bass regulation of the amplifier at 2/3 o'clock and cut at 9/10 o'clock the treble... but not yet perfect...
Let's see when I'll try your box! Having similar problems also with the TA W5-2143, similar brightness and missing the bass even here.
Both the CHP-90 and the W-2143 are missing the "body" to my ears and they sound thin.
The DA RS100-4 in the folded TLINE still the absolute winner actually (excluding MAOP but in a different way)...
The price difference (and when your factor in the effort that goes into making boxes) I don't really get the cheaper option for Mark Audio...Maybe the MAOP's are a little bit pricy, but the Alpair/Pluvia range are not that much more than the entry level.
I've got some MAOP7s to run in soon, no I will have room for the floor standing Pensil design.
I've got some MAOP7s to run in soon, no I will have room for the floor standing Pensil design.
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I have to say that is not my experience with CHP-90 drivers. It must be a cabinet thing I think? Reason being I fitted the CHP-90s in my FH3 to bed in and then have a listen. I found the sound very balanced and detailed tbh. The 12kHz spike if it was present never became prominent. The Bass was plentiful, clean and detailed but didn't reach down to the 48Hz Fb because of the 60Hz cutoff of the fh3s. That should be restored when mounted in the BlueBuck design.
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Although they are designed exactly for the chp90 parameters, I don't know if the designer built test boxes or merely simmed them in practice. But I will share my subjective findings and produce a youtube video. if Ive done my math correctly the volume is 28.5 litres with a published 40db @ -3db.
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Yes he has helped me a lot over the years so has Dave. My only gripe is the name. The chr90 version is called Sitatunga- far sexier 🙂
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Now I have listened for 25 hours. My first listening after completely newly installed drivers, the sound has become softer in the treble sound. The details have and the resolution has improved in every way.
The bass has softened a bit and the fine mid-range fills the room with lovely voices. Yes, it's a really good driver.
This is going to be a really good Christmas. 🎅
The bass has softened a bit and the fine mid-range fills the room with lovely voices. Yes, it's a really good driver.
This is going to be a really good Christmas. 🎅
Hope everyone had a nice Christmas with our families.
Now it's a new year. 2023.
I have now listened to CHP-90 for over 50 hours.
Has anything changed with the sound?
Yes, of course they have. The bass has crept forward. Clearer and a little deeper.
The treble then?
A little more detailed.
The midrange sounds wonderfully balanced. Clearly.
Glad it's still improving. Not that big of a difference but I wonder if it's over now.
100 hours it was said that it may take before they are recorded.
I'll check back in 50 hours and we'll see.
Now it's a new year. 2023.
I have now listened to CHP-90 for over 50 hours.
Has anything changed with the sound?
Yes, of course they have. The bass has crept forward. Clearer and a little deeper.
The treble then?
A little more detailed.
The midrange sounds wonderfully balanced. Clearly.
Glad it's still improving. Not that big of a difference but I wonder if it's over now.
100 hours it was said that it may take before they are recorded.
I'll check back in 50 hours and we'll see.
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Haven't used my tube amp in months. Plugged it in today.
It sounded different here at home. Didn't think there was such a big difference compared to ClassD.
More nuances in the tweeter.
Perhaps not as firmly in the bass, but the sound swings more. Stamp the beat.
I like the CHP-90.
After I've recorded those 100 hours I'll switch back to Maop10.2. Should be exciting.
It sounded different here at home. Didn't think there was such a big difference compared to ClassD.
More nuances in the tweeter.
Perhaps not as firmly in the bass, but the sound swings more. Stamp the beat.
I like the CHP-90.
After I've recorded those 100 hours I'll switch back to Maop10.2. Should be exciting.