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Soren Koelbaek
Denmark
เข้าร่วมเมื่อ 20 ก.ค. 2006
Hi everyone, I am a vintage hi-fi enthusiast based in Copenhagen Denmark.
I've always liked to tinker with technology and craftsmanship, and I am happy to bring you along for the ride!
My primary focus is to communicate my findings while i maintain my collection and try to understand audio theory and product history.
I hope you'll enjoy my videos!
Thanks you for watching
I've always liked to tinker with technology and craftsmanship, and I am happy to bring you along for the ride!
My primary focus is to communicate my findings while i maintain my collection and try to understand audio theory and product history.
I hope you'll enjoy my videos!
Thanks you for watching
I did this to my JBL 4343 monitors... Altec 604 project
5 years ago I built JBL 4343 clones, but I wasn't happy with the quality of my wood-working. So as part of re-doing them this summer, I wanted to re-use the not-perfect cabinet into a DIY platform and trying out the Altec 604 speaker driver.
Please remember!
* No original JBL 4343 enclosures where harmed doing this video
This big-box removable baffle platform also allows me to play around with some gear I might have dismissed for the JBL's and opening up for some much needed experimentation. both on the speaker front, but also crossovers, amplifiers etc etc.
Please remember!
* No original JBL 4343 enclosures where harmed doing this video
This big-box removable baffle platform also allows me to play around with some gear I might have dismissed for the JBL's and opening up for some much needed experimentation. both on the speaker front, but also crossovers, amplifiers etc etc.
มุมมอง: 5 069
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Vintage HiFi Maintenance: Accuphase P-300
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In this video I want to show some of what I do when with the equipment that I own. I've had my Accuphase P-300 for a couple of years, and I wanted to make sure everything was alright. Having old equipment, a lot of mishaps can be avoided by periodically inspecting and per-emptively adressing issues. This video was filmed some time ago, but hadn't gotten around to finishing it up and publishing ...
My RARE vintage HI-FI setup
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In this video I'll showcase my vintage Hi-FI setup, what equipment i use and why. I'll also talk a bit about future projects coming up. You can read more about some of my projects / thought / articles here: auditur.dk You can also follow me on instagram: auditive_culture My Equipment consists of: Luxman PD-444 turntable Fidelity Reseach FR-64S tonearm Ortofon MC-30 Super cartridg...
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A year ago I tried to build a better workshop in my apartment - it wasn't good enough. This year I've made it even better, and It now also supports me filming my projects. So not only do I have a better workshop, I have some exciting Hifi-related projects coming up in the near future.
Building a workshop stool from an old windsor chair
มุมมอง 2663 ปีที่แล้ว
So in the previous video I built myself a new workbench at home. But the workbench is quite high, so I needed a new stool / chair, but I also wanted to use this old chair-seat that i had laying around. It is not perfect or finished, but it's good enough for now. The idea of upcycling old / unused pieces of furniture or other stuff and turning them into new and useful items is always inspiring a...
Can you have a workshop in your bedroom? | I build a platform bed
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I love making and building stuff but living in a tiny apartment, space comes at a premium. My bedroom is turning into a mess of a workshop with a bed in it. The solution? - a platform bed to both hide the workshop behind the bed, and to provide storage for all my workshop needs. In this video i design and build a platform bed, together with friends to get more storage space and a more functiona...
Removing the drivers from the JBL L-100 Century speakers
มุมมอง 11K3 ปีที่แล้ว
This is a short follow-up to the JBL L-100 restoration video, where I was asked how I removed the drivers of the speaker. In this short video I'll show how I removed the drivers - they are fairly straight-forward, but the JBL L123A woofer can be stuck quite a bit - the method I use is to take a screw-driver use that as a lever in the hole in the chassis-frame. You don't want to insert it into t...
Cosmetic restoration of vintage JBL L-100 Century speaker
มุมมอง 52K3 ปีที่แล้ว
My friend has lend me a pair of vintage JBL L-100 Century's for restoration. They work just fine, but they has seen some abuse, so in this video I restore them back to their former glory. Nothing too special, just a cosmetic overhaul including: ► Sanding ► veneer repair ► Painting and oiling the cabinets ► Repainting the woofer driver The JBL L-100 Century is the consumer version of the 4310 - ...
Thanks for uploading it, beautifully done. BUT, as few people said about the painting on woofer, I would recommend to use Aquaplas to restore. All the best.
Aquaplas is the right material however, it is not possible to source as a a material (or very, very hard). When i researched and made enquiries last time, it came by the barrel, only in grey and had a shelf-life of 6 months. It is a rebrand of a material devised and sold as a structural paint used in large ships for acoustical control in engine rooms, apparantly. Also, I do not know if you can repair with Aquaplas - I would think you would have to have a raw paper-cone to give it an equal treatment.
Painting the woofers the correct way only increases the cone mass less than .05%. It's an Aquaplas coated cone. Do it.
As someone who is contemplating buying a JBL set of speakers, which one would you choose? L100 or L112?
hard to say - the L-100 centuries have their shortcomings, the L112 some other. I really don't like the tweeter of the L112, and the woofer driver needs to be refoamed and therefore there is more maintenance. However, you might find they are not as "boomy" and "bassy" as I've found being the L-100 problem. end of the day, I would trry and listen to both and see whatever fits you. the good thing with vintage audio is you don't usually lose money buying and regretting :)
@@SorenKoelbaek Thanks for getting back to me. However, please elaborate on the following: "However, you might find they are not as "boomy" and "bassy" as I've found being the L-100 problem." Maybe its my bad english but I didnt get that part. :) You lost me at the L-100 problem.
@@ScootieXP Your experience may vary, but in my opinion the L-100 tries to sound "bigger" than it is. Which results in a low-range that is not as precise at it should be: it has a lot of bass - for some modern music too much. Hope that helps.
@@SorenKoelbaek thank you.
Damping* not dampening...
thank you for that clarification!
I built JBL 4343 clones in 1978 with the help of my stepfather. All I had was the sales literature. I wrote to JBL, but they wouldn't provide more information. I used 1" and 2" oak glue blocks inside. Parts of the back are 2" MDF. I banged on the outside with my fist and added material to get rid of resonances. The baffle panels are two layers of (void-free) ½" marine plywood. I seal them with cork. I was going to use veneer on the outside, but opted for Wilsonart teak plastic laminate. It has better sound characteristics, has held up extremely well, and fools woodworkers. Applied polyurethane to all internal surfaces to prevent moisture intrusion. I replaced the 2231As with 2215As. I replaced the 2307 horns and 2308 diffraction lenses with Transylvania Power Company "The Tube" (Karlson couplers) on the 2420 compression drivers. That got rid of the nasal tone and allowed them to go above 20 kHz. I couldn't afford the 2405s, but decided I didn't need them. I borrowed an HP Wave Analyzer to tune the 4" ports, which are much longer (with elbow), and tuned for smooth lower response. I used polyester rather than fiberglass batting. It took a lot of experimentation to get the amounts and locations right. I bought active crossovers and tri-amped, mainly because I didn't feel skilled to design good crossovers. Had the surrounds replaced about 25 years ago. I've never wanted different speakers. www.diyaudio.com/community/threads/fs-pair-of-transylvania-power-company-the-tube.316728/
what do you use for a crossover?
where can i get new foam bits for the tweeters
They can be a bit hard to source - Ebay is your best friend, although I don't know any of the current sellers offering them, so I can't vouce for them directly. When you get them, please take care of removing the old foam and especially the leads for the driver than runs underneath. normally you can peel the old glue-pad off of the tweeter, but try to do it parallel to the leads so they don't break. There are a little bit of info and photos regarding that here: auditur.dk/jbl-l-100-speakers-a-guide/
@SorenKoelbaek Perfect mate thanks so much. I have ordered the foams from ebay and your advice is appreciated for when I fit them Thx
I would enjoy a video showing how to properly clean the knobs and buttons. Mine have become noisy and I hate to ship the amp just for a cleaning.
If it's noisy, then it's contact cleaning and It's showned above around 5:10 - it's pretty easy: the entire idea is to get your contact cleaner between the contact and the carbon area of the switch or potentiometer. As mentioned in the video you need to use contact cleaner without lubrication for buttons or switches and contact cleaner with lubrication (some brands have cleaner and lubricator as seperate products) for knobs/potentiometers. If you need to clean the physical knob (not the electrical component, but the metal knob) I usually use window-cleaner and an old toothbrush :)
Sound problem?
Bello.
Awesome
Nice job on the conversion. On DIY projects with well known entities like jbl or Altec, they have an insane amount of resource materials that can help guide you and others on the the best way to get the most out of their products, such as vent size, cabinet dampening, crossovers, etc. Altecs usually require minimal dampening like only 3 sides vs all 6, please take this in the way it’s given as a tip not a criticism because your implementation is pretty damn awesome
Tell us how those big JBL 4343 sound ? I only have and heard my large Tannoys.
They sound as big transparent studio monitors. I like them, but they are also very revealing and every listening session becomes a critical listening session with all details and errors highlighted. I do love them, but the Altec (which reminds me of Tannoy Ardens) have a lot of the same clarity while being a little bit more relaxed. So I find myself enjoying more records that sound awful on the JBLs
The inductors should be placed right angles from one other. Because it stops magnetic interference from each other. Look it up in crossover building on TH-cam. It actually shows the noise created.
Hi Robert That is correct. and it would be relevant if I where designing and building my own crossover. This is the Great Plains Uadio crossover sold for the unit
I could easily modify it. P.S. Great speaker projects both JBL & Altec.
Well, true - I swapped them out for a pair of Werner Jargusch phase corrected crossovers instead of changing the original part. I don't really like modifying, especially when it's so easy to just build another :) @@robertthurston6858
Hey pal! How are you liking these? I am planning on doing something very similar with the same drives as a first DIY proyect and I am curious if you are happy with it.
es wahr ein mahl ein Accuphase P-300
Человек хорошо делает не то что в наших роликах безвкусицв полная к
*Nice sound* 🤠😎
Doesn't painting the woofer change it's stiffnees and dynamics, increasing it's mass making it less efficient?i
In theory; adding mass to a woofer changes it's stiffness and mass - however there are a lot of changing factors in 50 year old speakers; the surround, the alnico magnetic field and the changing stiffness of the paper + aquaplas coating. On top of that, JBL (as with any manufacturer) produces units and crossovers and cabinets within tolerances, so adding a minute mass of paint to the woofer cone is not something you would be able to measure or hear in the final speaker. That being said, it is non-reversible so normally I would not do this, unless there was damage to the aquaplas coating or a previous botched repair (as in the video).
Hi so I have one of these but it’s missing a power cord is there one online I can buy I haven’t found one yet
Great job. A m a fan also of JBL retro speakers , building myself now a L100 clone . Nice record at the end there . Could you tell me the artist ? And have you som recomandation jazzy music for good 12 inch woofers ? Hilsen Tore from Norway
Awesome
Nice!
wrong method for repaint woofers, sorry - first of all you used too much paint, making the cone heavier and it will no longer respond to its original characteristics, then you left out some points in the masking, and it shows. Thirdly, the aquaplas woofers have a yellowed edge which gives them an original feature, it is the glue used to fix the pleated edge - in my opinion, if not too yellowed or scratched, the aquaplas cones should not be touched - I have had many pairs of 4310 - 4311 - 4312 - only on one occasion have I used water-based, acrylic paint, VERY diluted and with a small roller, blending in the border, in order to "refresh" the white but leaving the glue border yellowed - I assure you it is much better, especially below the sound profile
GREAT JOB!!! KEEP IT UP!!!
Building your speakers in an apartment is … messy. Using a bit router without a vacuum cleaner connected is….. dusty. Serious projects you are committed to.. Keep up the spirit :-)
Thanks! And I agree - space is a premium and when you don't have a dedicated workshop you'll have to do with what you have.
What brand black spray paint. Was it Matt finish?
9005 matte black
The L-100’s are not notorious, they’re famous. Big difference. I own 4 that I bought in 1978, all still mint condition.
How do I remove the face plate on the JBL CENTURY to do an upgrade on the crossover
Glad you asked - I'll respond in 2 parts: 1st part: With a minor heatgun and a good pair of japanese putty knives. Slowly heat up the foilcal and with the knife flat on the baffle you slowly with a steady force pres it underneath into the glue. You are heating up the glue. Keep the foilcal flat at all times, no bends or anything as you'll never get them out again. Store them on a piece of glass and you can reheat when you are done. 2nd part: please be aware that the crossover components by JBL are not electrolytic capacitors and therefore do not degrade over time. Moreover they are using values that are not common today. All of the crossovers i've had measured to specification without any issue. I would not upgrade the crossover as it makes the speaker a completely different animal. BUT you do you ;)
Great lil vid. Might need some more substance though? A new vid maybe? Aside from that, You have it in You Soren! Keep èm comin´...
what size sand paper and paint you used here?
I believe i worked from grit 120 to 320 and no higher. For the front face, just a matte black - I believe it's ral 9005 :)
During the 70's and early eighty's I was a professional musician. Every studio I walked into had a least one pair of 4310 JBL speakers for the engineer monitors. I always smile when people talk about the music is " supposed to sound" , because unless your standing in that room listening to the final mix, you will never know. The 4310 has always been my go to speaker for reference when it comes to rock music. Music is subjective and whatever sounds good to you is the right speaker. Thank you, as this was a wonderful walk through some great memories. Well done video work as well.
I do like them, however it does has it's own sound, and there are bigger and better studio monitors that are more revealing, but it's a double edged sword. The L-100 was very widely used, alongside the Altec / Urei Coaxial monitors or the bigger 43XX series. The L-100 was often times used as a way to say "this is probably how it would sound at someones home" - where the other monitors where used for mixing and are "too" reveaeling. But that is the reason I have a set of 4343's as well :)
What color is the spray 🙏🙏🙏
It is Montana Gold eggshell primer :)
I'll have a look and try to find the product no
Thank you very much, I would appreciate if you write the paint code  Thank you very much, I would appreciate if you write the paint code
Great video, I recently scored a pair of JBL L112’s in rough cosmetic shape, but they sound great. I was contemplating painting the woofers as the old glue looks awful… interesting reading your earlier comment re speaking with JBl techs re:sound after painting. Might give it a go myself.
I live in a single bedroom apartment as well. I moved my bed into the living area and my bedroom is now a dedicated woodwork area.I also have the same circular saw and drill, but I'm not really happy with that circular saw, it hasn't got a really sturdy base, but I will probably get a cheaper corded saw with a sturdier base.
1:.43 bad method, ,you need to apply glue to both parts first, then the part to be glued must be bigger, put over the entire side of the damage, then need to be sanded very slow, the part copy the damage hole perfect and like jigsaw no difference.
Thanks for the feedback - I'll try that another time ;)
Belo serviço! Essas L100 são fantásticas! Som de qualidade muito acima do normal em um projeto muito simples! Parabéns por cuidar e salvar mais um par dessas preciosidades!
The Danes, they just cant help themselves, perfection is a way of life.
I have some PIONEER HPM 100 and I want to restore both their cabinets and their Driver cones. What do you suggest for the woofer cones? Thanks from Colombia.
Like very much what you have done with your JBL.Idid on a sort of similar way the same with my Leak Sandwich 600 ,which I like a lot.
Can you tell me what paint you used please as I have also seen online not too paint the woofers, tks
Um you forgot the most import thing!..The grills
Awesome. Just finished replacing one of the two woofers by an original LX44 Woofer and Refoaming both JBL LX 44s Woofers. Awesome channel !! someone actually enjoying music
Curious why didnt you sand the front/back but rather just filled and sprayed them?
Hi Filip - The filler was just meant to fill cracks and even out the surface for the paint. There was no real need to sand the front and back down completely as long as the surface was smooth. As you can see I did sand the filler and surrounding area to even it out :)
Ugh….painting a cone?….you may as well re-engineer the crossover to attempt fixing that fatal error.
Congratulations! What a nice setup, Soren. Greetings.
Whats that drill press?
Just some old - Powercraft i think. Sturdy and kind of solid ;)
Wtf????
Nice video and i am actually inspired because I am in the process of doing what you did. I have acquired all the original parts and drivers for building a Yamaha s4115h speaker system. Is it possible for you to guide me on how to obtain the cabinet drawings with dimensions? Any guidance in this regards is much appreciated. Thanks in advance, Regards.
Hi Reuben I would love to help; I’ll try and do some research on the speaker you mentioned as I don’t know it - The. I’ll get back to you My main advice is to try to locate owners on forums. ask questions and for pictures - There are a lot of minute details that will be hard to ascertain without specific knowledge.
I’ve found a restoration video; that could serve as some very good reference material for determining; material width, structural parts and the enclosure dimensions. I would start there with a drawing and doing some math; measuring parts of your drivers and then referencing that on screenshots from the video. That would probably serve as the best source for plans without someone with a pair wants to share direct measurements with you. I would think you’ll never find a blueprint or plans, but you could probably get critical measurements from owners :)
@@SorenKoelbaek thanks, this is a really helpful insight. Will take this route.
Good solution. Ive had my bed on beer crates for years, so much space underneath. Looks like you have a lot more desk space now too, or is that visual illusion? Anyway; I've moved to Copenhagen recently. If you're looking for a new place to live, I'd be open for a flat share with a workshop in the living room. By biggest issue now; finding a place where I can have my old campervan close by but not on public road, so I can work on it and unregistering it (so I don't have to pay taxes or insurance).
Hi there - thanks for the reply! - I've actually changed the bedroom and bed again to have a much bigger workshop in there - (video coming soon!) Copenhagen can be a bit hard to find apartments in - and with the need of private roads it doesn't get easier. I know of some places having private parking garages that might allow for unregistering vehicles? otherwise the dream would be a private garage / workshop
@@SorenKoelbaek ah nice, I'm looking forward to seeing that :) May be good inspiration for my next place (current rental contract is expiring). And yes absolutely, finding a place for me and my van is a nightmare. I'm indeed looking into renting a workshop/garage, but then I'll still need a place to sleep. So, what do you make in your workshop? I saw your two videos on sound systems. Is that your profession or just a hobby?
@@MaudKonyn It is my hobby - or at least my job pays for that interest ;)
I have L220s. There are a lot of small veneer chips on the bottoms. What kind of walnut veneer did JBL use, please? I see a LOT of different colored walnut veneers. And I have some walnut boards here and they look more gray? Or would you just use wood filler? Regards, Bo
Hi Bo Thank you for asking, JBL used American Walnut veneer. The veneer has a grey tint before getting oil, so I wouldn't be afraid. If you need some inputs on filling veneer chips, you can also see the post I made on vintagehifi.dk Google: "JBL L-100 Century - Reborn III"
Also - the 220's are nice speakers! I am a bit envious!