Hi!
I spent the past few months learning, making, taking apart, and remaking. Finally, I am proud to say that my first Hybrid ESLs are done.
Here are the details:
Stator Size: 120 x 30 cm.
Spacer Thickness: 3 mm.
Diaphragm Type: 6 microns Mylar.
Diaphragm Coatiing Material: My own PVA glue formula.
Bias Voltage: 7.2 KV.
Step Up Transformer Ratio: 1:88.
Thanks a lot to everybody who has contributed to this forum for all the wonderful information.
Wachara C.
I spent the past few months learning, making, taking apart, and remaking. Finally, I am proud to say that my first Hybrid ESLs are done.
Here are the details:
Stator Size: 120 x 30 cm.
Spacer Thickness: 3 mm.
Diaphragm Type: 6 microns Mylar.
Diaphragm Coatiing Material: My own PVA glue formula.
Bias Voltage: 7.2 KV.
Step Up Transformer Ratio: 1:88.
Thanks a lot to everybody who has contributed to this forum for all the wonderful information.
Wachara C.
Wish it was mine - but then I'm a sucker for OB and AMT's. hello WACHARA Well done with the ELS speakers.In the uk I had the Quad ESL57's for years great sound.I bought the ESL 63'S When they came out had them for 2 weeks and sold them the sound was greatly inferior.I am living in pattaya perhaps could hear yours somtime. Paul
Awesome dude!
That much bias voltage should give really good output (SPL). Just curious, what's your diaphragm/stator spacing?
Great job!
That much bias voltage should give really good output (SPL). Just curious, what's your diaphragm/stator spacing?
Great job!
Is that a 1:88 voltage step-up ratio??? Impressive that you managed that without severe frequency response problems. What's the % open area of the stator material you used?
Nice job!
Nice job!
Hi Paul,
It's nice to hear from somebody in Thailand. If you have a chance to come to Mahachai, Samutsakorn, do let me know.
Wachara C.
Hi CharlieM,
The diaphragm/stator spacing is equal to the spacer thickness, which is 3 mm.
Wachara C.
That high of a ratio generally means high capacitance and leakage inductance. IME, anything over 30 or 40 to 1 was problematic, but I'm not an expert on transformers... Who wound them for you?
The transformers are wound by a local audio transformer maker. They kindly sponsored me on this project. I know about the possible problems of the leakage inductance and high capacitance. But, these transformers are very well made, and I don't have high frequencies roll off problems. I'll try to make some measurements later.
Wachara C.
Hi,
could well be that You don´t experience bandwidth probs, because the capacitance of the panel will be quite small. What on earth made You choose 6mm of stator-stator distance? Even some fullrangers don´t come with such large values. For a hybrid half of it would have been ok.
jauu
Calvin
could well be that You don´t experience bandwidth probs, because the capacitance of the panel will be quite small. What on earth made You choose 6mm of stator-stator distance? Even some fullrangers don´t come with such large values. For a hybrid half of it would have been ok.
jauu
Calvin
Hi Calvin,
I didn't really understand that much when I started. I learned little by little when I was making them. I was thinking of making them fullrange in the beginning. But, I wasn't that happy with the bass, and I got these nice pair of subwoofers from a friend. Therefore, I put an active crossover and pair them with the ESLs. To my surprise, they went together very well.
I'm sure that this is only my beginning. I hope to make a few pairs in the future. Let's see.
Wachara C.
I didn't really understand that much when I started. I learned little by little when I was making them. I was thinking of making them fullrange in the beginning. But, I wasn't that happy with the bass, and I got these nice pair of subwoofers from a friend. Therefore, I put an active crossover and pair them with the ESLs. To my surprise, they went together very well.
I'm sure that this is only my beginning. I hope to make a few pairs in the future. Let's see.
Wachara C.
Nice setup
Hey Wachara, very nice setup my friend, just wondering how you like the JL Audio drivers sound with your setup?
Also, something I have not seen anyone else ask in this thread, is what bass alignment you used for them, and how do you think they mate with your ESL'S. Any response would be welcomed, and thanks in advance
Steve
Hey Wachara, very nice setup my friend, just wondering how you like the JL Audio drivers sound with your setup?
Also, something I have not seen anyone else ask in this thread, is what bass alignment you used for them, and how do you think they mate with your ESL'S. Any response would be welcomed, and thanks in advance
Steve
Hi Linquisonic,
Thank you.
JL audio drivers go with these ESL extremely well. I use them together with an active crossover and a 15 watts @ 4 ohm, class D amp. The crossover can be adjusted from 30hz to 180 hz and it comes with a volume. I feel that my ESL can do pretty good at low frequencies and I only need to add just a little bit of bass to help. I'm sure that the crossover point isn't more than 100Hz, since I only turn the adjustment pot to only around 30%. Also 15 watts of power from these bass drivers are more than enough to help the ESL.
I'm not sure what you mean by bass alignment. I simply put the bass drivers anywhere. I don't feel the difference in sounding. Perhaps, those low frequencies aren't directional.
Wachara C.
Thank you.
JL audio drivers go with these ESL extremely well. I use them together with an active crossover and a 15 watts @ 4 ohm, class D amp. The crossover can be adjusted from 30hz to 180 hz and it comes with a volume. I feel that my ESL can do pretty good at low frequencies and I only need to add just a little bit of bass to help. I'm sure that the crossover point isn't more than 100Hz, since I only turn the adjustment pot to only around 30%. Also 15 watts of power from these bass drivers are more than enough to help the ESL.
I'm not sure what you mean by bass alignment. I simply put the bass drivers anywhere. I don't feel the difference in sounding. Perhaps, those low frequencies aren't directional.
Wachara C.
No Wach, I meant "alignment" in terms of bass box calculations, for example ( these are very rough guidelines)
Sealed box calcs
Q 0.5 = maximum control over driver= less bass, but "taut"
Q 0.707= maximum flat response= referred to as "optimum"
Q 1.0= slightly more bass but still "controlled"
Ported box calcs
SBB4, SC4,QB3 (optimum) SQB3, BB4,C4 etc...
Transmission Line😀
Uhmm forget it, unless you make a design using these very good (measured) design parameters utilized by Mr King (quarterwave.com) but in my humble opinion the best match for an ESL
Hope this explains things clearer
Steve
Anyway, CHEERS
Sealed box calcs
Q 0.5 = maximum control over driver= less bass, but "taut"
Q 0.707= maximum flat response= referred to as "optimum"
Q 1.0= slightly more bass but still "controlled"
Ported box calcs
SBB4, SC4,QB3 (optimum) SQB3, BB4,C4 etc...
Transmission Line😀
Uhmm forget it, unless you make a design using these very good (measured) design parameters utilized by Mr King (quarterwave.com) but in my humble opinion the best match for an ESL
Hope this explains things clearer
Steve
Anyway, CHEERS
Oh! Umm Oops
I see, in that case how far do the top, bottom, and sides of the box extend from the front and rear of the baffle?
Just wondering, and thanks again, Steve
I see, in that case how far do the top, bottom, and sides of the box extend from the front and rear of the baffle?
Just wondering, and thanks again, Steve
Speak about a ultrasonic electrical short?
Then lanbda/4 at frequency in 100 hertz will be major distance.
If I have correctly understood you
Then lanbda/4 at frequency in 100 hertz will be major distance.
If I have correctly understood you
Hi Steve,
I didn't make the subwoofer boxes myself. These boxes are made into cubic boxes. The front, back, top, bottom, and side are exactly the same dimension. The woofers are 12 inches and fit right in the middle of the boxes.
Wachara C.
I didn't make the subwoofer boxes myself. These boxes are made into cubic boxes. The front, back, top, bottom, and side are exactly the same dimension. The woofers are 12 inches and fit right in the middle of the boxes.
Wachara C.
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