• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Kraut's New Listening Space

KrautNotRice said:
Been listening to these for a good few days now with a wide variety of music, probably 30+ hrs, and very much like them. Since I finally decided on dimensions and style of new cabs, it was time to crack these open for a first look.

Tannoy i8 professional / pa speakers using type 2062 8" dual concentric, paper cone driver.
1.7 khz crossover point with 4th order high pass, 2nd order lowpass
Dynamic hf protection (light bulb)
In only .56 cf front ported
8 Ohm, 92db
-3db point is 85hz
130w average / 260w program / 520 peak power handling
Designed for high power handling, not full range, sound reinforcement

Just going to deposit this Tannoy pr0n here.























Just a stamped frame, paper cone woofer and aluminum dome tweeter here.
Who knew? Apparently it doesn't take super exotic materials and vapor deposited precious metals, nor cast baskets to make a ridiculously good sounding speaker with very high power handling, high sensitivity and near linear frequency response.









Crossovers look like there aren't any cheap electrolytics that need replacing right away.
Date code on woofer magnet reads 1998.
They sound really good above 100 hz or so, obviously they're not meant to have much bass. I don't know the stock cabs' tuning frequency, but the woofers' fs is most likely really high, they're very stiff. So I figured they'd be great with a pair of 15" pa subs.
The idea is to put these Tannoys in slightly larger, vintage style cabs and high pass them electronically somewhere around 100 to 200 hz, depending on how the subs end up sounding / blending.
Yes, mounting them in larger cabs with lower tuning will drop their power handling when they're played as stand-alone speakers (not high passed), but to be honest the P2200's needles haven't gone over 10 watts at my personal reference levels, and as is they can take 130 to 260.
In other words: these get crazy loud.
Click to expand...

Hey man, I’ll bring over the NFM 8’s and we will do a comparison of paper verses poly cone Tannoys. The 12’s are to much of a PITA to lug around.
 
Justgotohm said:
Hey man, I’ll bring over the NFM 8’s and we will do a comparison of paper verses poly cone Tannoys. The 12’s are to much of a PITA to lug around.
Click to expand...

^^^^^^ That will be great!

I've started working on the vintage Yamaha NS-20T speakers, they're 8" paper woofer 2 ways with titanium tweeters in a sealed cab, the smallest in that series NS-xxT. The bigger versions seem to all have pots for the tweeters, but not the 20s. Well, they really needed them, so I fitted some on the back panel. They're very good speakers, the tweeter just needed some attenuation.
Now the NS-20T do everything right in my opinion. Deep, punchy and fast bass, creamy midrange, and now laid back, smooth treble. They image fantastically and sound very musical and natural. The sound is very engaging, it is revealing but not analytical. Lovely, small-medium size as well. Even though I've got them 3' from the front and 5' from the side walls in my medium-large room on tall stands, they don't need a sub if that says anything.
When I first got them, I ordered the pots for the tweeters from Parts-Express and once installed, I spent quite a bit of time listening to them with the original caps in the crossovers. I have since ordered Audyn Q4 caps for them and snapped some pics of the recapping process.

The crossovers are on Yamaha-typical plastic boards with point-to-point wiring. Second order low and high pass.
8.2mf for the tweeter and 15mf for the woofer:



Old vs new. As you can see, the old 8.2mf cap for the tweeter is physically larger than the old 15mf woofer cap. BUT both of them are dwarfed by zee German Audyn Q4 caps:



I love the high quality touches Yamaha put on even these 'lowly' entry-level speakers back in the day: threaded inserts with socket head bolts, finished front baffles with recessed, mirror imaged drivers and removable grilles.



All soldered up, caps glued down with contact cement, ready to be reinstalled:



The crossover plate was stapled onto the back panel from the factory, with a thin foam gasket behind it. I used some screws to mount it back in its place after I was done:





More pics of these speakers will follow once I'm done with the exterior of the cabs...
 
Last edited:
I have had and continue to buy speakers. I go through speakers like sneakers, but one pair that I will never sell are my Yamaha NS-625's. These are seriously good speakers. Small 4 ohm babies that surprise me when listening to jazzy rock like steely dan or classical music. Intricate sound over these speakers is outstanding.

I like to use a equalizer to balance the frequencies to suit my own personal taste, but I also notice it appears to clean up the source signal. Maybe I'm crazy.

Good job on the upgrade and thanks for sharing.
 
Double post, but I wanted to say the veneer work that you did on you friends amp and turntable was outstanding. You took something that was beautiful and made it 10X more so. Where would a guy source that veneer?
 
SmileyFaceEQ said:
Double post, but I wanted to say the veneer work that you did on you friends amp and turntable was outstanding. You took something that was beautiful and made it 10X more so. Where would a guy source that veneer?
Click to expand...

Thank you very much. I'm glad you like your NS-625s, I hope to get a chance to listen to them one day.
JSO Wood Products is my source for veneer, though when going walnut, I much prefer Parts Express Band-It brand walnut.

Received some Energy Pro 22 woofers today. I don't have the original tweeters and won't try to chase them down, instead I've got a couple of tweeters on hand that can be crossed at 1500 hz, namely the SB Acoustics SB29 and the Genesis Physics inverted dome. Both of them are excellent tweeters. For a future project I might build Pro 22 style cabs for the woofers and try out those two tweeters with them...

 
Just read the whole thread, love the progress that you've made. Love the attention to detail.

I really like the look of the rug that you found. I'm off to see if I can find one to order! :) :thumbsup:
 
SPL db said:
Just read the whole thread, love the progress that you've made. Love the attention to detail.

I really like the look of the rug that you found. I'm off to see if I can find one to order! :) :thumbsup:
Click to expand...

Thanks!
Yeah a decorative rug on the wall kills two birds with one stone, it's acoustical treatment and decoration lol
 
So I'm chipping away at the Tannoy 8" dual concentric project. After a lot of back and forth I decided on a same size enclosure as what they came in, ported to the same frequency. Initially, I was tempted to build a larger cab for them as many do (around 1.4 cf) to extend bass extension, but at the end of the day, I will be running subs with them anyway and when I tried them in a larger test enclosure briefly, they seemed to have lost some of that magic and their amazing mid-bass attack... and despite digging a little deeper, they STILL needed subs of course. It's an 8" with a high fs... lol

For the shape, I decided on a tall, shallow, vintage style bookshelf. They will be on short stands that I have yet to build. The reason why I'm going all out on these is because it's fun, but they're total keepers and some of the most amazing, magical speakers I've ever heard.
I took some old Fisher 12" 3 ways and cut their enclosures down to the size I needed, cutting out all of the damage where possible, but saving the gorgeous 1968 walnut veneer and front edging. Because I can't match the original veneer, the front and backs of these 'new' speakers will not be veneered but painted.
I'm going for a shrunk down Altec duplex style look with front square port and vintage style grilles.

These are the Fisher speakers right before stripping down and their date with the table saw:



Here I am gluing up some internal bracing on the recycled cabs, they're now significantly smaller. In this pic the cabs are face down, I did save the front edging.



I'm currently working in the rear and front baffles and once the construction is completed, I will sand and refinish the old walnut veneer. Bringing that back to life will probably be the most satisfying part of this whole build, so I'm saving it for last. So more to come soon!
 
Last edited:
KrautNotRice said:
So I'm chipping away at the Tannoy 8" dual concentric project. After a lot of back and forth I decided on a same size enclosure as what they came in, ported to the same frequency. Initially, I was tempted to build a larger cab for them as many do (around 1.4 cf) to extend bass extension, but at the end of the day, I will be running subs with them anyway and when I tried them in a larger test enclosure briefly, they seemed to have lost some of that magic and their amazing mid-bass attack... and despite digging a little deeper, they STILL needed subs of course. It's an 8" with a high fs... lol

For the shape, I decided on a tall, shallow, vintage style bookshelf. They will be on short stands that I have yet to build. The reason why I'm going all out on these is because it's fun, but they're total keepers and some of the most amazing, magical speakers I've ever heard.
I took some old Fisher 12" 3 ways and cut their enclosures down to the size I needed, cutting out all of the damage where possible, but saving the gorgeous 1968 walnut veneer and front edging. Because I can't match the original veneer, the front and backs of these 'new' speakers will not be veneered but painted.
I'm going for a shrunk down Altec duplex style look with front square port and vintage style grilles.

These are the Fisher speakers right before stripping down and their date with the table saw:

Here I am gluing up some internal bracing on the recycled cabs, they're now significantly smaller. In this pic the cabs are face down, I did save the front edging.

I'm currently working in the rear and front baffles and once the construction is completed, I will sand and refinish the old walnut veneer. Bringing that back to life will probably be the most satisfying part of this whole build, so I'm saving it for last. So more to come soon!
Click to expand...

That's going to be great K! Perfect choice with the Fisher cabinets. They made better cabinets than speakers for the most part. :) Great re-purposing. I do wonder about your notion of painting the front baffle. One of the great aspects of most of the Tannoy speakers are the beautiful wood veneer baffles. Plus you don't have to build grilles. My Tannoy Mayfield T225 have a black front baffle with 10" DC driver plus a PR. The rest of the cabinets are really nice but wish the baffle was wood. (although on these seeing the PR isn't as nice as just that great DC driver)
 
Justgotohm said:
I sold those NFM system 8’s but don’t deliver for a couple weeks, hopefully we can do a side by side if you get finished up in time.
Click to expand...

We should! these may be done later today.


Drugolf said:
That's going to be great K! Perfect choice with the Fisher cabinets. They made better cabinets than speakers for the most part. :) Great re-purposing. I do wonder about your notion of painting the front baffle. One of the great aspects of most of the Tannoy speakers are the beautiful wood veneer baffles. Plus you don't have to build grilles. My Tannoy Mayfield T225 have a black front baffle with 10" DC driver plus a PR. The rest of the cabinets are really nice but wish the baffle was wood. (although on these seeing the PR isn't as nice as just that great DC driver)
Click to expand...

Thanks, I also really prefer veneer on front and back, but I can't match the old walnut no matter what, so my options are limited. Paint is the 'safe' way, contrasting veneer would be the risky, labor intensive way. We'll see. If I don't love the paint, i can always veneer later.
 
Progress on the Tannoy build (and others) is coming along, but I had to take a break from that to build a rack case for a friend's home recording studio. It's a 14U slanted case with casters built out of solid (knot free) pine using miter joints. Just for the pics I mounted my Ashly crossover and Crown D-75, but it will be filled with his outboard gear.







Here is a teaser pic of some Smaller Advent that I veneered in Sapele Mahogany. I will do a proper photo shoot for those shortly, these pics don't do the Sapele justice.



 
You must log in or register to reply here.
Back
Top Bottom