These are some OEM 15in carbon fiber cone and dustcap with doped PA-style cloth surrounds that I just received. These are designed with a high Qts for use in an open baffle speaker. Listening to it in open air sounds quite nice.
Nicely made with cast aluminum basket with spring loaded binding posts:
I listened to them in open air running full range. Quite pleasant and clear sounding.
Nicely made with cast aluminum basket with spring loaded binding posts:
I listened to them in open air running full range. Quite pleasant and clear sounding.
On the bench is the companion 12in coaxial with compression driver. This is a beast - 16.2lbs for the combo. Massive magnets.
I guess a high sensitivity pro audio style speaker may be in the near future here?
I guess a high sensitivity pro audio style speaker may be in the near future here?
I promised myself that I would revisit this speaker one day in wood. It sounded so good - even in cardboard!
https://www.diyaudio.com/community/threads/cheap-and-fast-ob-literally.249984/page-21
Well that day has come. 🙂
I have a local cabinet maker helping me to build these and we have finished the woofer manifold. Going with 8x 6.5in woofers this time for nominal 4ohms on woofers.
https://www.diyaudio.com/community/threads/cheap-and-fast-ob-literally.249984/page-21
Well that day has come. 🙂
I have a local cabinet maker helping me to build these and we have finished the woofer manifold. Going with 8x 6.5in woofers this time for nominal 4ohms on woofers.
Wow, this will be interesting. Great cabinet work! Looking forward to the final result and listening impressions X.
Yes with 60 degree coverage does works perfectly with that setup.
LSA Signature 80 is on my top 5 list.
From post #517 you are working on a ribbon speaker. Will that be commercial available? What are some of the major sound difference between planar and ribbon speaker you are offering? What brand are those ribbon and planar if it is ok to mention it.
What attract me to your speaker design you include the time and phase response aspect of it. With your Harsch crossover, do you need to listen from a certain distance and or within the sweet spot from the speaker to get correct arrival time of the sound? I have a friend who have the Green Audio Mountain speaker that is time and phase align using first order crossover and physical align the drivers. But you have to sit at the sweet spot and the correct distance to get the perfect time aligned sound.
Thanks for the center speaker suggestion. I will keep that in mind when doing auditions.
Hi Ken,
Technically the perfect time alignment from a non coaxial speaker can only be perfect at one spot. However, as I have found out from my 10F/RS225 FAST speaker that it’s quite forgiving. It’s still way better than having a LR4 that has a non time aligned step response even at the sweet spot. The planar is a GRS but with my custom CNC’d bezel/waveguide. The ribbon is custom OEM made for LSA.
YashN,
More info on the Harsch XO here:
https://www.diyaudio.com/community/threads/s-harsch-xo.277691/
Originally proposed by Samuel Harsch as a way to get quasi transient perfect time alignment and flat phase for IIR filters in DSP based speakers, I was able to implement it as a passive crossover by pushing the XO frequency higher in order to reduce the requirements for such a long time delay or phase shift. Also requires drivers with wide bandwidth and good behavior at breakup.
So far, I have managed to do this for a couple of speakers using passive means.
Technically the perfect time alignment from a non coaxial speaker can only be perfect at one spot. However, as I have found out from my 10F/RS225 FAST speaker that it’s quite forgiving. It’s still way better than having a LR4 that has a non time aligned step response even at the sweet spot. The planar is a GRS but with my custom CNC’d bezel/waveguide. The ribbon is custom OEM made for LSA.
YashN,
More info on the Harsch XO here:
https://www.diyaudio.com/community/threads/s-harsch-xo.277691/
Originally proposed by Samuel Harsch as a way to get quasi transient perfect time alignment and flat phase for IIR filters in DSP based speakers, I was able to implement it as a passive crossover by pushing the XO frequency higher in order to reduce the requirements for such a long time delay or phase shift. Also requires drivers with wide bandwidth and good behavior at breakup.
So far, I have managed to do this for a couple of speakers using passive means.
New review of the Vanguard speakers is out on SBAF loaner tour:
https://www.superbestaudiofriends.o...nguard-speaker-impressions.11814/#post-373079
The vanguards actually have a passive Harsch-like crossover (4th order low pass and 2nd order high pass and the tell is that the combined response is slightly below woofer only response plus nice right triangle step response):
https://www.superbestaudiofriends.o...nguard-speaker-impressions.11814/#post-373079
The vanguards actually have a passive Harsch-like crossover (4th order low pass and 2nd order high pass and the tell is that the combined response is slightly below woofer only response plus nice right triangle step response):
classier. are you still using the cheap dayton woofers? I still listen to my trynergy's with those woofers almost daily. Very satisfying.
Those aren’t readily available as this is going to be a commercial speaker. I’ll be using another brand - but similar in construction with a polycone and ferrite magnet. More powerful magnets though and 8ohms (4x 2p/2s/2p) for 4ohms nominal. I might go with a paper cone woofer that’s 94dB sensitive - still up for tests.
After nearly a 5 year hiatus on the shelf, I took out the HyQu headphone amp that I developed with Hugh Dean and listened to it again. Wow, that is a great sounding amp. It is a quasi complimentary design with MOSFET and BJT output stage and remains in Class A up to 1.25W into 51ohm headphones before going into Class AB. This was back when I used to make hand etched PCBs.
FFT for 7mW into 270ohm load:
FFT for 1.25W into 51ohms:
FFT for 5.05Vrms into 51ohms (500mW):
It sounds very dynamic and makes you want to tap your toes! I will have to talk to Hugh Dean about reviving this into a commercial product.
FFT for 7mW into 270ohm load:
FFT for 1.25W into 51ohms:
FFT for 5.05Vrms into 51ohms (500mW):
It sounds very dynamic and makes you want to tap your toes! I will have to talk to Hugh Dean about reviving this into a commercial product.
This one is a toe tapper alright! Need to try with power hungry planars next.
I love the smell of hydrochloric acid (aka Muriatic acid for cleaning sidewalks available at HD) in the morning!
It’s actually very satisfying to make a layout and etch it in 2 hours vs waiting 10 days for JLCPCB. 🙂
I love the smell of hydrochloric acid (aka Muriatic acid for cleaning sidewalks available at HD) in the morning!
It’s actually very satisfying to make a layout and etch it in 2 hours vs waiting 10 days for JLCPCB. 🙂
It's sold as a pool cleaner here, so my own home PCBs were made using that.
So far, my results have been OK for prototyping, it's not very consistent though. I have some new supplies to try etching with light but haven't tried that yet.
Definitely one of the best ways if you don't want to wait.
So far, my results have been OK for prototyping, it's not very consistent though. I have some new supplies to try etching with light but haven't tried that yet.
Definitely one of the best ways if you don't want to wait.
Some initial impressions by Tone Audio of the new LSA Signature 50 speakers that I designed:
https://www.instagram.com/p/CaTR10sseh0/
In depth review to follow soon.
Far field In-room Response, 6 cycle Frequency Dependent Window gating:
Quasi-Anechoic Near Field (corrected) Bass Response:
https://www.instagram.com/p/CaTR10sseh0/
In depth review to follow soon.
Quasi-Anechoic Near Field (corrected) Bass Response:
I don't think I mentioned the details about a simple mod I made in the Behringer UMC202HD thread to seriously improve THD for measurements with REW (or other). I was asked about them there.
This post gives the step-by-step modifications for the right channel.
Another member tried it on his card as well with great results.
In the same thread, a little earlier, you will find a simple mod by Alfred to disable the Phantom Power by removing an inductor (L4) as it causes higher order harmonic distortions and is never disabled even with the onboard switch at the OFF position.
Additionally, I have looked at the casing, and there are ways to improve the shielding. This post provides aditional details about what do to.
If you have this card or want to get one, these simple changes on it can provide a really good base for audio measurements for really, really cheap.
This post gives the step-by-step modifications for the right channel.
Another member tried it on his card as well with great results.
In the same thread, a little earlier, you will find a simple mod by Alfred to disable the Phantom Power by removing an inductor (L4) as it causes higher order harmonic distortions and is never disabled even with the onboard switch at the OFF position.
Additionally, I have looked at the casing, and there are ways to improve the shielding. This post provides aditional details about what do to.
If you have this card or want to get one, these simple changes on it can provide a really good base for audio measurements for really, really cheap.