Kelvin, I love watching your channel because I see stuff I have newer seen here in the US. In ‘72, I’d say Advent, AR, JBL, Dynaco, EPI ruled the day here.
Yes, they are the ultimate rock speaker. If you ever see original Large Advent speakers, they are worth acquiring. They had a huge sound for the money.
I think Jacob Jensen was more of an Industrial Designer. But he worked many years with Bang & Olufsen and have bene featured on MOMA in NYC and received a ton of prizes and was instrumental in developing the design at B&O - which is still in use today.
I am pretty sure it's an alnico magnet on that woofer. I have a pair of Goodmans Mezzo SL speakers, with a later version of those SEAS HO87 tweeters and 10in Goodmans aluminium alloy cast frame mid/woofers, which are dated 1975. I recapped the crossovers with equivalent Dayton metalized polypropylene caps and they sound very good. Back in the late 1970's a cousin of mine bought a new B&O system which was the Beomaster 1900 receiver, 3way S45 speakers and Beogram turntable. Back then, it looked very futuristic and sounded excellent to my young ears and I understood why they were so desirable and expensive.
B&O speakers are actually all tested and developed in a sound dead room already from midt 60ties and created of some pretty good sound engineers soo when these ware new they ware actually some of the best on marked
B&O speaker quality through the 1960's and 70's were OK but not consistently good. Some were better than others, as they made a wide range of speakers to compliment their many different systems and price points. At least they mostly used good quality speaker components from SEAS, Peerless and Philips, despite the boxes and crossovers being rather cheap and basic.
B&O was definitely on to something with the introduction of anechoic rooms for measurement, but on those early days the importance of the power response and controlled directivity wasn't fully understood. A speaker that measures perfectly in anechoic room is simple to produce - but it may or may not sound good in a normal room. This is because when you listen outside nearfield, about 80% of the sound comes to your ears from the reflections instead of the direct sound. That's why it's very important to design the speaker to either minimise reflections through controlled directivity or at least control the reflections so that the power curve of the speaker is nice and evenly sloped. And coincidentally that's why room acoustics is also so important factor in the final outcome. Simple optimizations with the speaker placement (making sure speakers are placed symmetrically in the room and measuring room modes in listening position) help a lot. Most people disregard acoustic treatments because they're ugly and expensive. But that's a mistake, especially if you're sinking thousands of dollars to hifi gear and expect good sound.
I have 1702s (both versions) the 2702s, 3702s and also the 4702s. Jacob Jensen was designer it says yes.. and its not just about the proportions, its about the construction. One of the first guys to seriously consider time alignment and phase response. But the M100's are probably the best loudspeakers B&O ever did
I always wanted to call this range BEY-OH-VOX .. I've a couple pairs of cx100 and cracking pair of s45-2 those really are good, theres a couple versions of that model - i have the ones with 3 drivers. later ones had just 2 drivers I think. the wood finish on your 2702 are gorgeous arent they! I always hankered for the bigger ones with the aluminium circles on the front baffle they look fantastic
Good review, I have a pair of Beovox S45-2. Have you been able to get these speakers in your listening room? I have read they where considered B/O reference speaker's. I had a pair of Klipsch KG-3's, the s45-2 are in a different league. My amp is a Rouge Spinx V3. Enjoy the holidays
Is Beovox not Bowvox but Beeeovox? So sorry to mention but your video’s are great. I had a pair of Beovox 5702’s which l believe had a B139 ‘racetrack’ bass spk. The popular 5700’s are different with large 2 circular spk’s. Was this H087 Seaz tweeter in either of these?
I have the bigger brother 3702 with separate mid range. Not such a nice tweeter but a Philips AD0160/T8 or t4. Someone switched out the 4ohm Goodmans midrange with a 16 ohm Sony driver.... I got some 4 ohm contemporary Seas drivers in stead. But still have to switch out the 50 year old capacitors.
@@stephenhill8806 I've always wondered about this. How does it cook the amp? wouldn't less resistance in the speaker mean the speaker gets cooked, not the amp?
You want the speaker ohm's to be equal to or more than the amp ohm's. So for example my speakers are 6 ohm's and my amp is 4 ohms which is fine. I'm pretty sure I'm correct but get another opinion.
@@stephenhill8806 Thank you. For my amp it says the following, 'Creek 4040 S3 Integrated stereo hi-fi amplifier with 2 x 30 watts into 8 ohms (2 x 40 watts into 4 ohms). Don't understand it if its ok or not.
I have a couple sets of these i got for really cheap and refoamed. Generally i think they sound great but they need some EQ to shine. I found the upper mids and low mids to be a bit prominent. Not at match on the S45-2 I also have, you should definitely check them out.
Yes that is for sure an AlNiCo magnet. The iron around it is closing the magnetic field. It gives an idea about the strength of these magnets, obviously size matters. But also the material thickness of this Iron "clamp". The thicker the better as it gets saturated by the magnet. So if it is thin, there is not much to saturate.
I don't know what an alneeko magnet is, but neodymium magnets are MUCH stronger. Even if they are 10 times smaller. Typically only higher end speakers use neodymium magnet, especially large towers. I have two sets of modern towers that use neodymium magnets with multiple bass drivers (3-7" and 2-8", which equal the surface area of 1-12" driver) and both pairs are quite heavy (65 and 75lbs each speaker). Regular magnets with the same magnets strength would push the weight of each speaker over 100lbs. I think the only advantage is to keep the weight down. It's the overall strength that matters.
Jacob Jensen made the designs, and then B&O made the electronics fit. This has never been a good idea as I guess most people know. It's better the other way around. In many cases it has lead to overheating, and mechanism's build to fit not working properly. Combined with their lack of soldering skills you have the recipe for what way too many have experienced over the years: A stereo being more at the repair shop than at home. B&O has used some pretty nice units in their speakers, but all in all they have never build what could be considered good speakers (though some of them do sound quite charming). But on the other hand no one (in their right mind) has ever bought B&O for the sound quality. B&O is about design, gimmicks and status. Stay awesome Mate. Merry Christmas from Denmark.
Kelvin, you nearly pronuonced Jacob Jensen correctly. J in danish is not pronounced like in english Dj. The J is more pronounced like an I like iacob iensen. Thats it - easy peasy
I find UA-cam to be the MOST FRUSTRATING thing I have ever used in my 61 years of life. I spend all of my "Free Time" on UA-cam SUPPORTING, WATCHING and COMMENTING on other CREATORS VIDEOS.... But, even if I ask another CREATOR ( Like Yourself ) for there OPINION or HELP it always falls on DEAF EARS. I am now thinking of CLOSING my UA-cam Channel. Because life is a TWO WAY STREET.
A large tweeter is a sign of a poor design (unless the tweeter is some esoteric interference mode one like a BNR). A large tweeter will become highly directional at very high frequency, making the power response suboptimal. Also a large cone/dome usually starts to break up at high frequencies. I'm betting that when these speakers were designed, designers didn't pay much attention to the power response and directivity index. Flat or flattish on-axis response is trivial to achieve but that does not make a good speaker by itself.
Hello Kelvin. Your a jewel in a mine of coal. Always informitve, just great👍👍👍
Always a treat. Appreciate your knowledge.
Kelvin, I love watching your channel because I see stuff I have newer seen here in the US. In ‘72, I’d say Advent, AR, JBL, Dynaco, EPI ruled the day here.
oh ok didnt know dynaco got to the US cheers K. btw still want me some big jbls
Yes, they are the ultimate rock speaker. If you ever see original Large Advent speakers, they are worth acquiring. They had a huge sound for the money.
Nice review and speakers. I listen to the Dynaco a25, a35 and the Solervox TK50 speakers on a regular basis and all have the same tweeter as these.
The the Dynacos were made in Denmark too. Actually not far from The B&o factory in Struer in Jylland.
nice one HI Michael
@@stereoreviewx Hi Kelvin, thanks for all the top class information you have provided us all with. Happy Christmas and New Year.
@ Happy Christmas Michael enjoy your interesting content K
I also extremely well enjoy your reviews. Keep them rolling.
Glad you like them!
Good review. And your English is very clear I am Portuguese and can understand everything you say.
Luckily he is not Australian :)
I think Jacob Jensen was more of an Industrial Designer. But he worked many years with Bang & Olufsen and have bene featured on MOMA in NYC and received a ton of prizes and was instrumental in developing the design at B&O - which is still in use today.
nice one
He was succeeded by David Lewis who designed much of the later equipment.
Great stuff Kevin . Keep the reviews coming into 2025 🎄
That's the plan!
The Beovox 2702 were my very first speakers. I bought them second hand together with a Beomaster 1900 in 1977. Sweet menories...
Best channel on UA-cam
Loved it. “You kind of want it to sound good”.
A magnet from that period, considering the size. It's Alnico. Seas made and still manufacture drivers that are some of the best available .
Ticonal
I've got a pair of Dynaco A25s that I've restored (including the crossover) they have that same large Seas tweeter and i think they sound great!
I am pretty sure it's an alnico magnet on that woofer. I have a pair of Goodmans Mezzo SL speakers, with a later version of those SEAS HO87 tweeters and 10in Goodmans aluminium alloy cast frame mid/woofers, which are dated 1975. I recapped the crossovers with equivalent Dayton metalized polypropylene caps and they sound very good. Back in the late 1970's a cousin of mine bought a new B&O system which was the Beomaster 1900 receiver, 3way S45 speakers and Beogram turntable. Back then, it looked very futuristic and sounded excellent to my young ears and I understood why they were so desirable and expensive.
Thanks
Thx Kevin 👍🌟👍
Thanks a lot Kevin for again another honest review on….reviews. BTW: These bigger other B&O speaker you showed 08:10: is that the Beovox 6208?
B&O speakers are actually all tested and developed in a sound dead room already from midt 60ties and created of some pretty good sound engineers soo when these ware new they ware actually some of the best on marked
B&O has always been more design than actual performance. Nice looking products with ok performance but can't compete with actual hifi products.
B&O speaker quality through the 1960's and 70's were OK but not consistently good. Some were better than others, as they made a wide range of speakers to compliment their many different systems and price points. At least they mostly used good quality speaker components from SEAS, Peerless and Philips, despite the boxes and crossovers being rather cheap and basic.
B&O was definitely on to something with the introduction of anechoic rooms for measurement, but on those early days the importance of the power response and controlled directivity wasn't fully understood. A speaker that measures perfectly in anechoic room is simple to produce - but it may or may not sound good in a normal room. This is because when you listen outside nearfield, about 80% of the sound comes to your ears from the reflections instead of the direct sound. That's why it's very important to design the speaker to either minimise reflections through controlled directivity or at least control the reflections so that the power curve of the speaker is nice and evenly sloped. And coincidentally that's why room acoustics is also so important factor in the final outcome. Simple optimizations with the speaker placement (making sure speakers are placed symmetrically in the room and measuring room modes in listening position) help a lot. Most people disregard acoustic treatments because they're ugly and expensive. But that's a mistake, especially if you're sinking thousands of dollars to hifi gear and expect good sound.
ai don't postulate that the marked heigh end hifi speakers but back den they ware sum of the best you cud bey in normal radio stores
I have 1702s (both versions) the 2702s, 3702s and also the 4702s. Jacob Jensen was designer it says yes.. and its not just about the proportions, its about the construction. One of the first guys to seriously consider time alignment and phase response.
But the M100's are probably the best loudspeakers B&O ever did
intersting thnks
top video as always! im sure i had the same tweeter in an old pair of goodmans
yes
I’d be interested in the refoaming video please.
will do
love my Heybrook HB3's - new crossovers - super ..
Really like your videos 😊
Thank you! 😊
Very similar to Dynaco A10 another great sounding Scandinavian compact speaker from around 1970 before LS3/5A came along.
Yes, made in Denmark🤓
Sonab used those peerless woofers in the 70'
As did Mordaunt Short , Tandberg etc,
I always wanted to call this range BEY-OH-VOX .. I've a couple pairs of cx100 and cracking pair of s45-2 those really are good, theres a couple versions of that model - i have the ones with 3 drivers. later ones had just 2 drivers I think. the wood finish on your 2702 are gorgeous arent they! I always hankered for the bigger ones with the aluminium circles on the front baffle they look fantastic
Great video!
The beovox 2600 (6237) has these driver's and tweeter's but with a tiny paper supertweeter. Maybe worth investigating.
3000 are v nice
@stereoreviewx I watched your vid. I would love to have a play with the 3000's.
That woofer's magnet surely looks like a "horseshoe" Alnico. Mostly met in vintage guitar speakers.
Good review, I have a pair of Beovox S45-2. Have you been able to get these speakers in your listening room? I have read they where considered B/O reference speaker's. I had a pair of Klipsch KG-3's, the s45-2 are in a different league. My amp is a Rouge Spinx V3. Enjoy the holidays
s45-2 are fantastic
ive had abunch of that range but not S45 all pretty good
Is Beovox not Bowvox but Beeeovox? So sorry to mention but your video’s are great. I had a pair of Beovox 5702’s which l believe had a B139 ‘racetrack’ bass spk. The popular 5700’s are different with large 2 circular spk’s. Was this H087 Seaz tweeter in either of these?
yes i guess its beeeeovox and no seas tweeter in those 5702 s thats a celestion super tweeter i think
I have the bigger brother 3702 with separate mid range. Not such a nice tweeter but a Philips AD0160/T8 or t4. Someone switched out the 4ohm Goodmans midrange with a 16 ohm Sony driver.... I got some 4 ohm contemporary Seas drivers in stead. But still have to switch out the 50 year old capacitors.
Nice review, once again. Would these 4 ohm speaker be suitable to run a 8 ohm amplifier (Creek 4040 S3)?
I'm no great expert but I think running 4 ohm speakers may slow cook an 8 ohm amplifier.
@@stephenhill8806 I've always wondered about this. How does it cook the amp? wouldn't less resistance in the speaker mean the speaker gets cooked, not the amp?
You want the speaker ohm's to be equal to or more than the amp ohm's. So for example my speakers are 6 ohm's and my amp is 4 ohms which is fine.
I'm pretty sure I'm correct but get another opinion.
@@stephenhill8806 Thank you. For my amp it says the following, 'Creek 4040 S3 Integrated stereo hi-fi amplifier with 2 x 30 watts into 8 ohms (2 x 40 watts into 4 ohms). Don't understand it if its ok or not.
i gotta say i do it all the time
I posted the video of the rare NAD Model 240 Speakers if you want to have a look.
They are the best Sounding Speakers I have ever owned.
I have a couple sets of these i got for really cheap and refoamed. Generally i think they sound great but they need some EQ to shine. I found the upper mids and low mids to be a bit prominent. Not at match on the S45-2 I also have, you should definitely check them out.
sure they might suit a band o amp or receiver mids are a bit recessed with bass boost thanksK
Why are so many B&O speakers 4 ohms?
It doubels poweramplifier watts, b&o used philips ekectronics
Yyes i hear this alot about phillips thing is i never heard a phillips to compare
Yes that is for sure an AlNiCo magnet. The iron around it is closing the magnetic field. It gives an idea about the strength of these magnets, obviously size matters. But also the material thickness of this Iron "clamp". The thicker the better as it gets saturated by the magnet. So if it is thin, there is not much to saturate.
thanks for that K
I don't know what an alneeko magnet is, but neodymium magnets are MUCH stronger. Even if they are 10 times smaller. Typically only higher end speakers use neodymium magnet, especially large towers. I have two sets of modern towers that use neodymium magnets with multiple bass drivers (3-7" and 2-8", which equal the surface area of 1-12" driver) and both pairs are quite heavy (65 and 75lbs each speaker). Regular magnets with the same magnets strength would push the weight of each speaker over 100lbs. I think the only advantage is to keep the weight down. It's the overall strength that matters.
Its a ticonal magnet ,and tweeter hs alnico magnet
the plot thickens tks
I got Sonus Faber Amati but I also own 4 pairs of Beolabs BnO make good stuff
Jacob Jensen made the designs, and then B&O made the electronics fit. This has never been a good idea as I guess most people know. It's better the other way around. In many cases it has lead to overheating, and mechanism's build to fit not working properly. Combined with their lack of soldering skills you have the recipe for what way too many have experienced over the years: A stereo being more at the repair shop than at home.
B&O has used some pretty nice units in their speakers, but all in all they have never build what could be considered good speakers (though some of them do sound quite charming). But on the other hand no one (in their right mind) has ever bought B&O for the sound quality. B&O is about design, gimmicks and status.
Stay awesome Mate.
Merry Christmas from Denmark.
Hi yes i allways worry when amps are slim you just asking for troubke
cheers from london K
Kelvin, you nearly pronuonced Jacob Jensen correctly. J in danish is not pronounced like in english Dj. The J is more pronounced like an I like iacob iensen. Thats it - easy peasy
ok nice hack thanks
Big foam paper cone albuquerque
really
I find UA-cam to be the MOST FRUSTRATING thing I have ever used in my 61 years of life.
I spend all of my "Free Time" on UA-cam SUPPORTING, WATCHING and COMMENTING on other CREATORS VIDEOS....
But, even if I ask another CREATOR ( Like Yourself ) for there OPINION or HELP it always falls on DEAF EARS.
I am now thinking of CLOSING my UA-cam Channel.
Because life is a TWO WAY STREET.
A large tweeter is a sign of a poor design (unless the tweeter is some esoteric interference mode one like a BNR). A large tweeter will become highly directional at very high frequency, making the power response suboptimal. Also a large cone/dome usually starts to break up at high frequencies. I'm betting that when these speakers were designed, designers didn't pay much attention to the power response and directivity index. Flat or flattish on-axis response is trivial to achieve but that does not make a good speaker by itself.
good info it still sounds nice though most of the time
Maybe sounding good, but probably the worst looking speakers era. :)
no way
sorry awful. so dated
have you heard them ?
So, how does it sound? Ever considered playing it?
No, I use photosynthesis
Big foam paper cone albuquerque