So while I wait for the goodies to arrive for the crossover, and work thru figuring out the L2 inductor value, I removed the front baffle and the speaker terminal for the cabinet to be duplicated.
Some pictures of the cabinet .
@planet10 Interesting to see that it's a birch ply over MDF and the back is MDF as well. Very well sealed, though you can see that the gasket wasn't secured well when the rear binding post/receptacle was installed originally.
(I'm also hoping that this thread puts some needed visibility and information on Tangent Acoustic since there's very little information out there on these speakers/company. )
Some pictures of the cabinet .
@planet10 Interesting to see that it's a birch ply over MDF and the back is MDF as well. Very well sealed, though you can see that the gasket wasn't secured well when the rear binding post/receptacle was installed originally.
(I'm also hoping that this thread puts some needed visibility and information on Tangent Acoustic since there's very little information out there on these speakers/company. )
Some additional progress updates. I was able to remove the inductors from the crossover and they measured different (no surprises, thank you all for guiding me).
The L1 was 0.58, L2 was 2mH and L3 was 0.34mH.
I ordered replacement inductors to complete the kit. So far the only regular cap that I am using is the 50uF/50V.
Other changes:
1) purchased a 4.4uF Cap instead of the 2x 2.2uF (Should this make a difference?)
2) Still running the 1uF + 1uF configuration, but will look to upgrade them to a 2uF.
3) Slightly concerned about running lower DCR inductors (air core) vs the original ferrite core, but I am assuming it should have minimal impact.
Photo of the x-over with the inductors removed.
The L1 was 0.58, L2 was 2mH and L3 was 0.34mH.
I ordered replacement inductors to complete the kit. So far the only regular cap that I am using is the 50uF/50V.
Other changes:
1) purchased a 4.4uF Cap instead of the 2x 2.2uF (Should this make a difference?)
2) Still running the 1uF + 1uF configuration, but will look to upgrade them to a 2uF.
3) Slightly concerned about running lower DCR inductors (air core) vs the original ferrite core, but I am assuming it should have minimal impact.
Photo of the x-over with the inductors removed.
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I have a follow up Q to the experienced crowd here. I see 2 caps in parallel at the top and 2 more at the bottom. Is this purely a parts availability/cost situation or dividing the capacitance across 2 Capacitors actually help the sound?
I see 1uF + 1uF in parallel at the top and correspondingly 2.2+2.2 uF at the bottom. Both are on the Tweeter/HF
Should I be good to replace them with 1x 2uF and 1x 4.4uF?
I see 1uF + 1uF in parallel at the top and correspondingly 2.2+2.2 uF at the bottom. Both are on the Tweeter/HF
Should I be good to replace them with 1x 2uF and 1x 4.4uF?
Thanks dave /@planet10 . Yep. You can actually make out the reading on the side of the green caps (2.2+/- 20%).
Other crossovers that I looked at for the T27 (Corelli, TM2, Chorale) use 5uF in Series along with a 2uF in series (the 2uF matches the 1+1uF here, albeit it's later in the network, while earlier here).
The TM2 3-way uses a 1uf+2.2uF in parallel, in series with a 2.2uf+2.2uF in parallel. attaching images of what I found on the internet.
The Chorale uses 2 5uF in series with an inductor in parallel with the tweeter.
Other crossovers that I looked at for the T27 (Corelli, TM2, Chorale) use 5uF in Series along with a 2uF in series (the 2uF matches the 1+1uF here, albeit it's later in the network, while earlier here).
The TM2 3-way uses a 1uf+2.2uF in parallel, in series with a 2.2uf+2.2uF in parallel. attaching images of what I found on the internet.
The Chorale uses 2 5uF in series with an inductor in parallel with the tweeter.
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I have just taken delivery of a pair of Tangent TM1s.
One owner.
Almost mint condition, with boxed.
I have yet to unpack them...
One owner.
Almost mint condition, with boxed.
I have yet to unpack them...
A bit late, but I would definitely move the crossovers. Mounted right over the tweeter, the magnet/steel will alter the inductors significantly.
I would have thought John Greenbank would have investigated alternative crossover
mounting, before deciding where to place it.
mounting, before deciding where to place it.
I owned Tangent RS4s for years.There was something magical about their sound.
I was interested in a pair on eBay.
Looking closely, one of the Audax bass/mid. drivers was split.
Getting hold of a replacement would be difficult.
I’ve often wondered what the differences are between the RS4s
& TM1s.
Looking closely, one of the Audax bass/mid. drivers was split.
Getting hold of a replacement would be difficult.
I’ve often wondered what the differences are between the RS4s
& TM1s.
My favourite one, had them for sometime. I was in a top floor and we would take them up on the roof, with speaker wired reaching from inside the apartment. Sounded absolutely fantastic.
I learned alot from Greenback, only crossover bit i learned was that the Rs in the XO were too close to the damping foam (and the Rs shoulkd have been higher power) … while we were partying one Friday, John was visiting, we were driving RS4 with Brystoin 4B, fried a woofer, and got the R so hot it started the foam smoking … sudden silence accompanied by a lot of acrid white smoke pouring out the sqaure vent. Don & i swapped out the woofer within 15 min and the music resumed.
dave
My RS4s were part of my first system which I bought when I was a uni student.Spent most of my holiday job pay from working through a sweltering Perth summer in an even more sweltering paper bag factory. The rest of the system was Thorens TD160 turntabe/Stanton 681EEE cartridge with Dynaco Pat 4 preamp and Stereo 120 power amp.That was a great system and especially great for Van Morrison for some reason.
Been a while since I updated this. I completed a RS2 clone if you may, and am working an RS4 now (Same XO, bigger cabinet with port). The sound for the age of the Audax woofer is still relevant, crisp and musical. Love the way they sound and the imaging is excellent. I've since compared them against the TM1, Corelli, 103.2s.
The 103.2 have greater capabilities overall, but versus the others the RS2 have a sweeter sound overall.
The 103.2 have greater capabilities overall, but versus the others the RS2 have a sweeter sound overall.