An Introduction from Songer Audio

songeraudio

Manufacturer Handmade Field Coil Speakers
Aug 3, 2022
73
227
40
54
Portland, OR
www.songeraudio.com
We're so happy to have joined the What's Best Forum community!

Below you'll find a little information about myself, Songer Audio, and of course the 100% handcrafted field coil loudspeakers that we make in Portland, Oregon.

About Songer Audio

Songer Audio is the product of my lifelong passion. It is the sum of thousands of hours of design and redesign, of refinement and production, and of an obsessive drive to perfect the joyful experience of music. My background is in software engineering, where I had a successful 20-plus year long career. While I owe much to the software industry, programming was rarely more than a means to a paycheck for me, rather than something I've loved to do. I've always been an artist at heart, and whether I've been drawing, sculpting, painting - or, most recently, designing and building drivers and loudspeakers - creating art has been my true calling.


surrounds_and_voice_coils.jpeg

I have been occasionally designing and building speaker cabinets with factory drivers since my college days. At a point however, I began to wonder if I could produce the drivers for my speakers as well. That curiosity led to a nearly decade-long, obsessive exploration into field coil driver design, and the result of that work is what I believe to be one of the finest full-range drivers in the world. It is a work of art, and everything from its brass and aluminum frame, to the cones and voice coils, the suspension, the surrounds, the motors - is all constructed and assembled in my small shop in Portland, Oregon.

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This year has been an exciting debut for us. We exhibited both the S1 and S2 at the Pacific Audio Fest in July, and most recently at the Capital Audiofest in DC, to overwhelmingly positive responses from press and attendees at both events. At the Pacific Audio Fest, we were honored with a coveted Oasis Award by Dr. David Robinson of Positive Feedback, for the S2. The S1 captivated press members with another major publication at the Capital Audiofest just last month, and in a few weeks we will be shipping a pair to them for a full review. More details on that will be coming soon.

caf.jpg

A Modern Field Coil Driver

Field coils have been around for over 150 years, and were all but replaced entirely with plentiful and inexpensive permanent magnets in the 1950s. However in spite of being expensive and labor intensive to make, field coils are the superior magnet for sound reproduction. They provide a constant highly uniform gap density, and a magnetic stiffness that is hundreds if not thousands of times higher than a permanent magnet.

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That uniformity and stiffness translates into very high accuracy and low distortion, better in both respects than permanent magnets are capable of. They are also adjustable. Varying the power supplied to the field coil changes the Thiele Small parameters of the driver, and as a result tunes the character of its sound.

4th_gen_motors.jpg

The patented spider design holds the voice coil in tension with a flexible, acoustically transparent lattice and a carbon fiber composite collar, ensuring accurate, linear cone motion and no unnecessary resistances to the music signal whatsoever. The Type D dipole version of our driver takes advantage of the acoustically transparent spider to include a rear-firing whizzer, the only one of its kind in the world. This provides phase coherent presentation across the full frequency range in both the front and rear of the driver.

suspension.jpg

The S1 and S2 Loudspeakers

The S1 loudspeaker minimally compensates for natural cabinet diffraction, and nothing else. The signal isn't needlessly degraded, as no filters or crossover circuitry are necessary. It simply holds the driver at ear level, where it plays with perfect phase and timing, free of coloration, and port tuned for deep, accurate bass.


s1_capital_audiofest copy.jpg

The S2 is a product of years of intensive development. It suspends the Type D field coil driver almost wholly in free space, attached at a single point to a layer-constrained, high mass, hardwood and glass-filled nylon mount for excellent imaging and clarity. Its Acoustic Elegance LO15 dipole woofer is "port constrained" on the front side to lower resonant frequency and raise efficiency. The baffle is folded into a discrete, open chamber in the back, which greatly reduces sound wave cancellations common in dipole applications, and delivers full and yet unmistakably dipole bass response.

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Thanks to everyone at WBF, for making us feel so welcome! I'm looking forward to sharing much more over the coming year. Cheers, everyone.

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Gjo

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Aug 22, 2021
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Beautiful!
 
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Catcher10

Well-Known Member
Dec 28, 2018
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I heard these at Pacific AudioFest and really liked them, a lot! Very impressive build and sonic character, very easy listen.
 

Solypsa

Well-Known Member
Jun 7, 2017
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www.solypsa.com
Also heard them at PAF to wonderful effect. I wrote you, lets talk! ( I am in Seattle and work mostly with vinyl replay products )
 

songeraudio

Manufacturer Handmade Field Coil Speakers
Aug 3, 2022
73
227
40
54
Portland, OR
www.songeraudio.com
Also heard them at PAF to wonderful effect. I wrote you, lets talk! ( I am in Seattle and work mostly with vinyl replay products )
I'd love to! I apologize for not getting back to you, I must have somehow missed or overlooked the message. In any case, please feel free to DM me here, or shoot me an email to songer.audio@gmail.com and I'll reply just as soon as I can. Cheers!
 

gleeds

Industry Expert
May 29, 2018
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I met Ken and heard his creation at CAF. The sound was silky smooth and emotionally engaging. I just wish I had more time to listen and learn the ins and outs of how Ken's single driver loudspeakers make the magic! Welcome to WBF Ken and keep the faith. I have no doubt that as more people experience your loudspeakers your following and customer base will steadily grow. Gary
 

tima

Industry Expert
Mar 3, 2014
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Interesting. Nice photos.

Would you describe sonics you hear across a certain low-to-high current range?

How does line noise impact the electromagnet?

Thanks.
 
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songeraudio

Manufacturer Handmade Field Coil Speakers
Aug 3, 2022
73
227
40
54
Portland, OR
www.songeraudio.com
Interesting. Nice photos.

Would you describe sonics you hear across a certain low-to-high current range?

How does line noise impact the electromagnet?

Thanks.
Thank you, glad you like the photos!

Adjusting the power supply voltage has a fairly significant effect. Raising and lowering the variable voltage to the field coil changes the Qts, or the total Q of the driver. Lower voltage increases Qts, which delivers a richer, fuller sound. Increasing the voltage lowers Qts, which trades some richness for increased midrange and treble presence, and somewhat sharper imaging. I designed the driver for (and, personally prefer) 12VDC - excellent imaging and overall tonal balance.

Regarding line noise, the high noise rejection design of the power supply removes line noise effects from the electromagnet - happy to share further design specifics of that if you’re interested… cheers.
 

tima

Industry Expert
Mar 3, 2014
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Regarding line noise, the high noise rejection design of the power supply removes line noise effects from the electromagnet - happy to share further design specifics of that if you’re interested… cheers.

Thanks for the follow-up.

I understand that the power supply attempts to mitigate line noise effects on the electromagnet. Where I'm curious is how does line noise impact operation and sound - iow, absent that mitigation, what are its effect?
 
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Maril555

Well-Known Member
Jun 26, 2014
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Heard them at CAF. Easily the best sound of the show for me.
Admittedly I didn’t get to spend much time.
 

songeraudio

Manufacturer Handmade Field Coil Speakers
Aug 3, 2022
73
227
40
54
Portland, OR
www.songeraudio.com
Thanks for the follow-up.

I understand that the power supply attempts to mitigate line noise effects on the electromagnet. Where I'm curious is how does line noise impact operation and sound - iow, absent that mitigation, what are its effect?
Ah, I see Tim - any cause for variations in the field coil voltage / flux density can manifest as distortion. Using a well-designed power supply certainly makes a difference with a field coil driver! Alternatively, some use batteries to power them - although I've not yet tried it. :)
 
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Tuckers

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Nov 18, 2020
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Where is the power supply? Is it in the base? What is the front port for? I see no power leads into the driver, where are these?
 

tima

Industry Expert
Mar 3, 2014
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Where is the power supply? Is it in the base? What is the front port for? I see no power leads into the driver, where are these?

You can see then sitting on either side of an amp in one of his pictures, though they are not obvious. You probably want to look at his Web site. Power supply comes from a separate company in it's own box
 
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infinitely baffled

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Thread subscribed ?
I'm intruiged by the dipole S2. And those field coil drivers look magnificent!
 
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Zeotrope

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Feb 11, 2021
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Thanks for the follow-up.

I understand that the power supply attempts to mitigate line noise effects on the electromagnet. Where I'm curious is how does line noise impact operation and sound - iow, absent that mitigation, what are its effect?
I have recently discovered that the power supply for the field coils makes a HUGE difference to the sound quality! I’m amazed at how relatively unknown this is. A lab grade supply is going to be far below the potential of any FC driver.
Even with a well designed Wolf von Langa latest gen supply, I heard significant improvements by grounding it to a Shunyata Denali (and soon through an Altaira), and applying a 3M EMI absorption pad above one part of the main transformer.
Most manufactures will pay little attention to grounding and EMI absorption, which is another issue… but maybe that’s just reflective of the general state of the industry and most manufacturers hubris that their products are great out of the box and don’t need any ‘tweaks’… anyway, the point is that that the FC power supply is actually just as if, if not more, important than the quality of the driver itself.

Great to see that Songer Audio has given considerable thought to the field coil power supply!
 
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Ron Resnick

Site Co-Owner, Administrator
Jan 24, 2015
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Welcome to WBF, Songer Audio!

The speakers look beautiful!
 

Steve Williams

Site Founder, Site Owner, Administrator
I've gotten to know Ken recently over the past few weeks. To say that Ken has a passion for what he does is an understatement as he is innervated when you talk to him about his speakers. Ken has an interesting background but he has always had a passion for audio. I was stunned when Ken told me that not only has he designed but so also has he built his own FC driver which is eye candy to observe. To understand Ken's passion, one needs only to talk about his driver and speakers. I have not heard the speakers but by all accounts they are something very special.Ken told me that everything we see on his website was designed and fabricated by himself, including hand making his speakers
 

songeraudio

Manufacturer Handmade Field Coil Speakers
Aug 3, 2022
73
227
40
54
Portland, OR
www.songeraudio.com
Thank you @Steve Williams @Ron Resnick for the warm welcome! And, to @Catcher10 @Solypsa @tima @Gjo @infinitely baffled @Maril555 for the kind words. Regarding the shows this past year, I loved doing them and am glad some of you have had the opportunity to enjoy the speakers. Hopefully, the air conditioning will work in our room next year at PAF! :)

I'd especially like to thank @gleeds. Thank you Gary for our great conversations, and for leading me to this wonderful, thriving community. I feel so fortunate to have become a part of it. This is going to be an amazing year for Songer Audio.
 

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