I've always wondered about Aperion. Because they are localish, there are a fair number of used speakers available and some of them look really nice. These seem to be aimed more at the HT over stereo listening so the dip might not be as bothersome?
Mah... As Amir says you have 50hz at 0 db, 40 hz at -5 db and 32 hz at - 10... all at very low distortion and/or high SPL. Just plainly impossible to get them with a small speaker.
The maximum SPL is directly proportional to the cone diameter and port tuning. Efficiency though is related to enclosure size. Theoretically you can produce even 20Hz at 0dB — though the port tube may have extend outside of the box(You could just about argue 60Hz is at 0dB, but not 50Hz)
I've seen that, wrapping around like an old-fashioned exhaust. Of course a passive radiator is the more conventional solution.The maximum SPL is directly proportional to the cone diameter and port tuning. Efficiency though is related to enclosure size. Theoretically you can produce even 20Hz at 0dB — though the port tube may have to be outside the box
I have not heard this line but their Verus line is definitely capable of great stereo listening. You should check them out. they have a showroomI've always wondered about Aperion. Because they are localish, there are a fair number of used speakers available and some of them look really nice. These seem to be aimed more at the HT over stereo listening so the dip might not be as bothersome?
The original trick, better to say the purpose of D'Appolito's scheme was to avoid exactly that bad interference pattern. D'Appolito stated rules by which the not as bad intereference with conventional configurations could be circumvented: 3rd order x/o, quite limited center to center distance between drivers, symmetry, period ;-)Nice. Directivity in D’Appolito drivers configuration is always a bit tricky.
As a potential user with a reasonably large and tall open-plan room to drive, I am interested in compression tests. Are these no longer a part of your Klippel regime? Are other readers disinterested in compression data? Can the compression numbers be divined from the test data presented here?I agree. The issue is that I measured this speaker two months back and I just can't find the time to listen to it. It is also blocking the pipeline for other speakers. So I decided to release the measurements.
(No, I don't sit in front of them and want to destroy my hearing. But I often wish to play them loud in a place other than my normal listening chair.*)
*My normal listening position is about 4 meters away at the tweeter level where I might wish to have peak SPLs of 88 dB (~100 dB @ 1 meter). But I regularly listen casually at my desk, which is about 8 meters away. To achieve even 82 dB there, I need to have >>100 dB at 1 meter. I have 150 watts RMS from my amplifier, so signal power isn't the limitation.
So, compression is surely a factor. And I'm pretty sure that many here don't listen in a 4 meter x 5 meter x 3 meter spare bedroom.
No to the 4 x 5 x 3... (that was cited as an example of a small listening room.)I am trying to imagine how your desk is 8 Meters from the speakers with the speakers out a bit into the room and your deck chair about a meter from the wall. meaning the entire room must be approximately 10 meters in length...
but.....you say the room actually is 4 meters x5 meters..in size...........?
Score is 5.3 and 6.3 with an EQ. If you add a perfect subwoofer, you get to 6.9 and with both EQ and sub 8.0.
Below you can see the effect of a simple EQ:
View attachment 241071
EQ for Aperion N5T computed from ASR data Preference Score 5.3 with EQ 6.3 Generated from http://github.com/pierreaubert/spinorama/generate_peqs.py v0.16 Dated: 2022-11-04-08:35:24 Preamp: -5.3 dB Filter 1: ON PK Fc 1835 Hz Gain +4.06 dB Q 3.00 Filter 2: ON PK Fc 3079 Hz Gain -2.46 dB Q 2.88 Filter 3: ON PK Fc 153 Hz Gain -1.03 dB Q 1.09 Filter 4: ON PK Fc 357 Hz Gain -1.66 dB Q 2.96 Filter 5: ON PK Fc 1941 Hz Gain +1.50 dB Q 2.99 Filter 6: ON PK Fc 171 Hz Gain +0.85 dB Q 2.95 Filter 7: ON PK Fc 605 Hz Gain +1.15 dB Q 2.95 Filter 8: ON PK Fc 1875 Hz Gain -1.37 dB Q 2.87 Filter 9: ON PK Fc 1883 Hz Gain +1.27 dB Q 2.98
My point of view is that the EQ is not really useful in this case. You lose 5dB of max SPL which is a lot. If you have a good room, possibly the dip at 2k (visible in the PIR) is audible but dips are always harder to hear.
Aperion N5T APO EQ LW 96000Hz November072022-130807 Preamp: -4.7 dB Filter 1: ON HPQ Fc 52.24, 0.00, 1.43 Filter 2: ON PK Fc 80.44, -2.57, 1.44 Filter 3: ON PK Fc 353.81, -1.18, 5.03 Filter 4: ON PK Fc 579.51, 1.84, 3.69 Filter 5: ON PK Fc 1910.63, 4.48, 2.36 Filter 6: ON PK Fc 2521.00, -1.31, 4.14 Filter 7: ON PK Fc 4507.81, 2.48, 3.28 Filter 8: ON PK Fc 7643.85, 2.06, 0.61 Aperion N5T APO EQ Score 96000Hz November072022-130808 Preamp: -5 dB Filter 1: ON HPQ Fc 44.72, 0.00, 1.48 Filter 2: ON PK Fc 79.94, -2.02, 1.44 Filter 3: ON PK Fc 349.79, -1.69, 6.00 Filter 4: ON PK Fc 595.22, 1.84, 2.47 Filter 5: ON PK Fc 1888.24, 4.82, 2.36 Filter 6: ON PK Fc 2570.19, -1.31, 3.86 Filter 7: ON PK Fc 4245.65, 1.76, 6.49 Filter 8: ON PK Fc 9032.49, 1.80, 0.49
Aperion N5T APO EQ True Score 96000Hz November072022-150939 Preamp: -4 dB Filter 1: ON HPQ Fc 44.72, 0.00, 1.48 Filter 2: ON PK Fc 91.04, -1.85, 1.19 Filter 3: ON PK Fc 349.41, -1.87, 5.00 Filter 4: ON PK Fc 584.59, 1.52, 2.86 Filter 5: ON PK Fc 1899.49, 5.11, 2.37 Filter 6: ON PK Fc 2558.68, -1.21, 3.64 Filter 7: ON PK Fc 4252.65, 2.06, 5.39 Filter 8: ON PK Fc 3814.70, -1.17, 0.26 Filter 9: ON PK Fc 7970.00, 1.10, 1.30