first of all, a better readable version of the measurements:
I do not really know what my objectives were any more 🙂
Actually I just want the best sounding speakers out of this design. Without changing too much and spending weeks and weeks of tuning things I do not hear. I really belive though in trying to get some more low end and filtering the 10-20hz. I am just listening to them again with these eq settings from my cubase.. and they sound sweet! So nest is.. how to build that buttersheving thingie and the filter for the sub low freqs?
An externally hosted image should be here but it was not working when we last tested it.
I do not really know what my objectives were any more 🙂
Actually I just want the best sounding speakers out of this design. Without changing too much and spending weeks and weeks of tuning things I do not hear. I really belive though in trying to get some more low end and filtering the 10-20hz. I am just listening to them again with these eq settings from my cubase.. and they sound sweet! So nest is.. how to build that buttersheving thingie and the filter for the sub low freqs?
For the baffle step try this online calculator for a start:
Loudspeaker Diffraction Loss and Baffle Step Compensation Circuits
I would not go for an absolute flat response as this might/will kill the sound. Try for a 2db cut and go .5db until you like the sound. Keep in mind the off axis response. Honestly, I have not had much success with single driver speakers and bsc filters.
For the rumble fliter, is it possible to put it in at the source?
Loudspeaker Diffraction Loss and Baffle Step Compensation Circuits
I would not go for an absolute flat response as this might/will kill the sound. Try for a 2db cut and go .5db until you like the sound. Keep in mind the off axis response. Honestly, I have not had much success with single driver speakers and bsc filters.
For the rumble fliter, is it possible to put it in at the source?
BSC can be left out if you have curved front baffle and if you place these close to the wall. Which should also improve bass. Can you try this and measure them again? Or just use your ears and let us know 😉 Great thread!
When Audience demonstrated "The One" (I think it was at the AXPONA Atlanta show last spring) they put the speakers close to, if not touching the front wall. He was playing a jazz combo track with bass solo that sounded just like it was coming from the larger (2+2?) speakers that were placed a couple feet out from the wall. We were all shocked to learn that huge bass solo came from the 1s. The boundary effect of the wall helped the low bass a lot. You can probably ignore the peak at 20k unless you are one of those few with bat ears. I remember the Audience sales rep told me adamantly that there was no EQ in The One. Impressive little bugger. We were sitting in a large room, about 14 feet deep x 20 feet wide x 8 tall. Those little speakers filled the room.
I took a good look at the passive driver on The One at that show. At first it looked like one of those 4" Dayton neo drivers. But seeing your Peerless now I think it must have been that one, especially since they recommended it to you. But they may have changed the mass. Thanks for sharing your project, very interesting!
I took a good look at the passive driver on The One at that show. At first it looked like one of those 4" Dayton neo drivers. But seeing your Peerless now I think it must have been that one, especially since they recommended it to you. But they may have changed the mass. Thanks for sharing your project, very interesting!
If they used the same driver, same passive radiator and same box volume, they must have some wonder trick that we haven't found out yet if they got impressive bass without eq-ing and or filtering. Don't get me wrong, this driver is capable of some impressive bass, but not without helping them. To my ears, they sound perfect after I apply this filtering:
when placed 2 cm from the wall that is...
Pretty frustrating. Would there be something like speaker building magic after all? Grrrr HELP! ;-)
when placed 2 cm from the wall that is...
Pretty frustrating. Would there be something like speaker building magic after all? Grrrr HELP! ;-)
Without buying a pair and tearing into them to see how they're built, I doubt it. Some think that their new driver (A3-S) is different from the one they sell to us, I'm not sure I believe that. Does your listening room maybe kill bass response for some reason? Still I think its worth building a pair to see how they sound even if I have to EQ them. Do you know what amp they used to drive them in the showroom? IF so it might be worth experimenting with a similar amp in your set up and also try wiring them in both 16 and 4 ohm configs to see if that makes a difference.
I bought the driver directly from them, and it is a A3s driver that they have used them selves...
I have no clue what amp they used.. I have tried them with three different ones now... I am working on getting my minidsp working at the moment.. If that is finished I am going to work further on the speakers. The only thing I can think of is that they work with a different passive radiator (although they recommended the one I used to me). It seems to help relatively little in the bass response...
Will keep you posted!
I have no clue what amp they used.. I have tried them with three different ones now... I am working on getting my minidsp working at the moment.. If that is finished I am going to work further on the speakers. The only thing I can think of is that they work with a different passive radiator (although they recommended the one I used to me). It seems to help relatively little in the bass response...
Will keep you posted!
Hey erik,
So is the a3-s just the new DVC driver? I have the older one that is 16 ohm, is there any other difference than the DVC? If not then I think they must be doing some sort of e-q or room conditioning in their demonstrations. Unless they use some different PR than the one we are asuming they use. Anyone got a pic of the rear of this speaker to see if it looks like the same part? I think maybe the interior is stuffed and lined with some sort of damping material but really this is just a simple 2 litre enclosure nothing special so we should be able to duplicate it.
So is the a3-s just the new DVC driver? I have the older one that is 16 ohm, is there any other difference than the DVC? If not then I think they must be doing some sort of e-q or room conditioning in their demonstrations. Unless they use some different PR than the one we are asuming they use. Anyone got a pic of the rear of this speaker to see if it looks like the same part? I think maybe the interior is stuffed and lined with some sort of damping material but really this is just a simple 2 litre enclosure nothing special so we should be able to duplicate it.
Also, according to their website the a3s based "One" speaker is 4 ohm, other specs make it appear to be using the standard DVC version of the a3. I would imagine that finding a good amp that rates well into 4 ohm, and some sort of room correction strategy would get you a lot closer to their ideal. Their speaker is also rated at 25 watts continuous so a clean amp that produces around 50 or so would be a good starting point, beyond that and you might hurt these little gems.
It took a while, but here they are:
(actually, here it is)
In reality it looks a lot better, damn those high resolution camera's.
Outside sizes: 14cm wide 18cm high, 17cm deep (5,5" x 7,1" x 6,7")
I used quite thick wood for the final version (2,2 cm, about 0.9"). In reality, it is a lot thinner because of my work on the inside of the wood:
(laugh at me, but seriously, it works!)
Volume without the holes is 0,058 ft3 or 1,6 liters, my educated guess is 0,07 ft3 or exactly 2 liters.
There is a decent amount of sheep wool inside (filled without actually stuffing).
I run them with 4Ohm, driven by a extremely cheap (out of money) T amp 2x50W: 2 X 50Watt Class D Audio Amplifier Board - TDA7492_Class D Amplifier Board_Audio Amplifier and other Audio Boards_Audio_Sure Electronics' Webstore
So how do they sound?
what can I say, very little surprises after the prototypes.
Stereo imaging is more than superb!
Sound without filtering is disappointing, but after a little filtering these little speakers ROCK! Even without the passive radiators. So what is "a little filtering"? Hold on to your hat, it is not going to be pretty:
to add low & warmth:
5.9 dB boost at 109Hz, Q= 0.5
10 dB boost at 120Hz, Q=0.5
to cut the harshness:
4.8 dB cut at 8177Hz, Q=4.1
to add some air:
4.8 dB boost at 11839Hz, Q=0.5
3 dB high shelf from 14K upwards
so... what can I say...?
(actually, here it is)
An externally hosted image should be here but it was not working when we last tested it.
In reality it looks a lot better, damn those high resolution camera's.
Outside sizes: 14cm wide 18cm high, 17cm deep (5,5" x 7,1" x 6,7")
I used quite thick wood for the final version (2,2 cm, about 0.9"). In reality, it is a lot thinner because of my work on the inside of the wood:
An externally hosted image should be here but it was not working when we last tested it.
(laugh at me, but seriously, it works!)
Volume without the holes is 0,058 ft3 or 1,6 liters, my educated guess is 0,07 ft3 or exactly 2 liters.
There is a decent amount of sheep wool inside (filled without actually stuffing).
I run them with 4Ohm, driven by a extremely cheap (out of money) T amp 2x50W: 2 X 50Watt Class D Audio Amplifier Board - TDA7492_Class D Amplifier Board_Audio Amplifier and other Audio Boards_Audio_Sure Electronics' Webstore
So how do they sound?
what can I say, very little surprises after the prototypes.
Stereo imaging is more than superb!
Sound without filtering is disappointing, but after a little filtering these little speakers ROCK! Even without the passive radiators. So what is "a little filtering"? Hold on to your hat, it is not going to be pretty:
to add low & warmth:
5.9 dB boost at 109Hz, Q= 0.5
10 dB boost at 120Hz, Q=0.5
to cut the harshness:
4.8 dB cut at 8177Hz, Q=4.1
to add some air:
4.8 dB boost at 11839Hz, Q=0.5
3 dB high shelf from 14K upwards
so... what can I say...?
Hey Eric,
Your pic doesn't exist anymore!
I have a number of these as well, just not the time, though they are the single voice oil version.......
Glad you are having good results with them!
Cheers,
Drew.
Your pic doesn't exist anymore!
I have a number of these as well, just not the time, though they are the single voice oil version.......
Glad you are having good results with them!
Cheers,
Drew.
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