Interesting thread, even though I noticed the thread quite belated.
Let me slightly join here from Japan as one of the ASR audio enthusiasts mainly using Japanese rather old (almost vintage) speaker drivers and cabinet, as well as Japanese HiFi amplifiers. (I confess that I use Okto DAC8PRO 8-Ch multichannel DAC from Czech Republic; this is only one audio gear from abroad in my setup.)
Firstly, about speakers, since the title of this thread is specifying to "speakers".
I still use SP drivers and cabinet of Yamaha NS-1000 (not NS-1000M). As for the availabilities of SP parts and services, we need to have separate perspectives for SP drivers, LC network parts (inductors, capacitors, resistors, attenuators, etc.) and cabinets.
Yamaha NS-1000M and NS-1000 were produced in Japan and supplied all over the world during 1974 throughout 1997, such a long 23 years, essentially with no change/modification at all. Yamaha has been keeping all the parts including the SP drivers (units) and providing maintenance services until around 2013 even after they stopped production of all the Beryllium midrange and tweeter drivers in 1997. Very fortunately, at least in Japan (and several in abroad), we still have many repair service small factories for NS-1000, NS-1000M, NS-1000X, and NS-2000.
Almost the same for my L&R active sub-woofers Yamaha YST-SW1000 (49 kg each) covering 15 Hz - 55 Hz in my setup.
I purchased my NS-1000 pair in 1976, and I still use the original SP drivers and the rigid heavy (39 kg) wonderful cabinet.
Please refer to
my post here for the difference between NS-1000 and NS-1000M, also refer to
my post here for specifications for NS-1000 and YST-SW1000.
Yamaha NS-1000;
https://audio-heritage.jp/YAMAHA/speaker/ns-1000.html
Yamaha sub-woofer YST-SW1000;
https://audio-heritage.jp/YAMAHA/speaker/yst-sw1000.html
Many of you may well know that NS-1000's (and NS-1000M's) midrange 8.8 cm Be-dome squawker (JA-0801, covering 500 Hz - 6 kHz) is still one of the best midrange drivers and the 3.0 cm Be-dome tweeter (JA-0513, covering 6 kHz - 25 kHz) is also still very nice (not the best, I know, it starts to decline around 14 kHz, so I added Fostex T925A super tweeters). In
my multichannel multi-amplifier project, I eliminated all the LC-network and attenuators, and the SP drivers are now directly driven by dedicated amplifiers.
You would please find my latest system setup as of May 30 2022
here (post #540) on my project thread.
As for the 30 cm cone woofer JA-3058 (covering 50 Hz - 500 Hz) and L&R large heavy active sub-woofers Yamaha YST-SW1000 (49 kg each,covering 15 Hz - 55 Hz), recently I measured intensively their transient characteristics and found they are still surprisingly excellent even almost 46 years after the production.
- Measurement of transient characteristics of Yamaha 30 cm woofer JA-3058 in sealed cabinet and Yamaha active sub-woofer YST-SW1000: #495,
#497,
#503,
#507 on my project thread.
After establishing 0.1 msec precision time alignments between all of the SP drivers, I found the total performances and sound characteristics of NS-1000 drivers + T925A super tweeters + YST-SW1000 are still really excellent in multichannel multi-amplifier setup.
- Perfect (0.1 msec precision) time alignment of all the SP drivers greatly contributes to amazing disappearance of SPs, tightness and cleanliness of the sound, and superior 3D sound stage: #520
Usually my guests coming to our audio listening sessions are HiFi audio enthu people and/or really professional (or semi-professional) musicians in classical and early classical music who are very much familiar with modern/contemporary HiFi audio setup, and they always express their frank impressions that my setup (including room acoustics) would be similar or much better than other extraordinary expensive setups to which we can listen at many high-end audio shops and studios in Tokyo Akihabara Electric Town.
For Fostex T925A super-tweeters which I purchased in April 1996, I experienced very nice maintenance overhaul service by Fostex Company last year 2021 December, as I shared
here and
here. It is really wonderful and amazing that T925A was launched in 1994 and it is still on Fostex product lineup (longer than 28 years!) with full Fostex craftsmanship repair and maintenance services.
Next, let me briefly touch on my amplifiers for their durability and availabilities of services.
I actually had long and intensive amplifier exploration journey in my multichannel multi-amplifier project, and you may find the summary of such amplifier exploration
here on my project thread. As I wrote there, again, the durability and service availability were two of my main concerns for amplifier selections.
I wrote
there;
- You would please note that, in addition to my intensive evaluations shared in my preceding three posts, these amplifiers are Japan domestic products still with good warranty and service capabilities within Japan, even under the very difficult pandemic status which may not subside for another year or much longer.
- Of course, as I wrote and shared in detail, we (my wife and I) are really satisfied and much impressed by the wonderful total sound presentation given by these three amps plus the sub-woofers in my multichannel multi-amplifier setup.
I use Accuphase E-460 as one of the four amplifiers in my current setup, and you may know Accuphase amplifiers are rather expensive.
I wrote
here;
Accuphase provides repair and maintenance services for any of their past and present products sold in the past 50 years. Just one phone call to Accuphase, and they collect the amps (by the specially contracted transfer company having huge Accuphase boxes) at your home and they send it back to you afterwards; usually within one week quick and perfect service (in Japan) in reasonable cost after the warranty period. Of course the service is completely free within the warranty period.
I did it three times on my E-460; Accuphase's own decision to replace one capacitor (after the warranty period but of course free; a kind of gentle/generous preventive recall?), one repair for my mistake (short-circuit at SP terminals while operation) and one full overhaul maintenance.
They have several large storage rooms keeping huge amount of amp parts, including rather old capacitors, resistors, inductors and so on, used in their old products. In case if they cannot find the same parts, sometimes they even handmade it (by themselves or by contract-out) for perfect repair and maintenance, still in reasonable cost for us.
Their comparably high price list includes the cost covering such repair/maintenance policy, operation, human resources and services, I believe.
And I also wrote
here;
Accuphase is intentionally restricting their export sales less than 30 % of their total business revenue in order to keep existing as an pure Japanese independent sustainable company;
http://www.accuphase.com/company_profile/a2_management_policies_2.pdf
At least within Japan, I also can still access to almost the same level of maintenance services for my Yamaha amplifiers (A-S3000, A-S301) and Sony's TA-A1ES.