As I mentioned in Part 1 of this post, I got back from Idaho yesterday afternoon where I had joined with my family to celebrate my Dad’s 90th birthday! It was awesome!
After getting home I unboxed the Panatela WRSE internal wiring set that Mark Coles had sent for the Duelund-WRSE Project. This project has been so cool with everyone rallying around to make it happen – a huge thank you to everyone!
I installed the Panatela WRSE internal wiring set into the left Westminster Royal SE last night, and I am going to update this post today as I install the set for the right side WRSE and get the system back up and running, so stay tuned as the day proceeds for progress reports.
As I mentioned in the first post, the idea for the wiring harness was to intall a continuous set of wires from the Westminster Royal SEs’ Dual Concentric driver all the way to the Duelund external crossover without any connectors along the way that would degrade the fidelity of the signal.
I attached the low-frequency Panatela cable set to the Dual Concentric driver’s low-frequency leads using WBT 8 AWG crimp sleeves. The high-frequency Panatela cable set was attached to the Dual Concentric drivers high-frequency contacts with a dab of WBT silver solder, as was the Panatela ground cable.
The Panatela cable set goes directly from the driver down through the routing channels in the WRSE cabinet. The second routing cutout is just above the foam in the photo. The cables were pulled over into the channel and then Blu-Tack’d in place.
The Panatela cable set goes through the holes in the binding post plate that the stock binding posts occupied prior to their removal to give a nice and clean interface. The low-frequency Panatela cable set is a tight fit and takes a bit of wiggling to get the shrink-wrapped end stared through the holes! Once started it goes through cleanly and fits perfect.
From the binding post plate the Panatela high & low-frequency cable set goes directly to the Duelund external crossover.
The dedicated ground for the driver goes off direct to the amplifier bypassing the Duelund crossover.
The Panatela low & high-frequency cable sets attach to the binding posts on the Duelund low & high-frequency crossovers using the binding post bypass technique, which uses the binding posts only to clamp the spade connectors directly to the wires of the Duelund crossover, so there is no signal degradation going through the binding posts (for those who don’t know, binding posts are a source of significant signal degradation, so it’s best bypass them if you can).
Another angle …
If you look closely at the photo above, the holes through the binding posts are oriented so that they are horizontal to the top surface of the Duelund crossover. The bare Neotech wire from the crossover is inserted through the holes in the binding posts with enough wire present on each side for clamping. The spade connectors are then inserted in front of the wire and the binding post nut is tightened until is smashes the Neotech wire on each side of the clamp into the back of the binding post, clamping it very tightly in place.
The top-view closeup above shows the order of attachment for bypassing the binding posts: from right to left, the Neotech wire is inserted through the horizontally positioned holes in the binding posts, then the Panatela spade connecter is inserted in front of the wire, then the binding post nut is tightened, clamping the spade and Neotech wire tightly together between the two surfaces of the binding posts.
This morning I installed the Panatela cable set that goes from the amplifier to the Duelund external crossover. In the photo above you can see the Panatela high & low-frequency cable sets connected by their spades to the Sophia Electric 91-01 300B mono amplifier, along with the dedicated Panatela ground cable for the Tannoy Dual Concentric speaker connected by a banana connection. Notice also the Sablon Audio Petit Corona power cord that is plugged into the back of the 300B mono – it’s a nice match. I’m working on the review for Positive Feedback Online now.
In the photo above you can see the Panatela high & low frequency cable set that is used between the amp and the Duelund high & low-frequency crossovers. You can also see the dedicated ground cable coming in to the amp from the WRSE in lower right-hand side of the photo.
You can see in the photo above that the same binding post bypass method was used on the amp side of the Duelund crossover.
You can see in the photo above that after finishing the installation for the left Westminster Royal SE loudspeaker that there is a continuous run of Panatela from the Dual Concentric driver to the Duelund crossover, and from the Duelund crossover to the amplifier.
As an aside, some of you have been asking for some more comparators for how good the Panatela speaker cables set is (it’s really, really, good speaker cable!), and Mark shared this note with me from a customer (Steve) who replaced his Nordost Valhalla with Sablon Audio Panatela:
“I know people occasionally ask you how my cables compare to xyz of the big brands and I thought you might appreciate this recent feedback from a customer who compared the Panatela to his Nordost Valhalla to give some calibration. Steve went on to take delivery of the tweeter cables (mid and tweeter in his case) last week and felt they surpassed his expectations of what could be achieved. Is always good to know our ears aren’t deceiving us!
I spent the day wrapping my ears around the sweet sounds of your speaker cables. Ok, are you an audio magician or genius or both? The valhallas I have in bi wire config are the best sounding and most expensive cables I have had in my system, until now…. Your cables even in single wire config make my v’s sound dry and analytical as well as forward. Your cables are so much more musical and spacious and warm, they gave me back the low end I was sad to have lost with my new dac. The description that comes to mind is that perhaps the valhallas are engineered around textbook and measurements where yours seem to be engineered around real world audio performance. Needless to say I’m looking forward the the gains from bi wire with yours, I’m also listing my v’s on the gon this coming week hoping for a quick sale so I can have you send me magic of my own!
Thank you for opening my ears so to speak.
Like I’ve been saying, if you haven’t tried the Panatela speaker cables optimized for your loudspeakers you don’t know what you’ve been missing!
Ok, it’s now time for me to start installing the Panatela cables set for my right-channel Westminster Royal SE loudspeaker, so check back for updates after a while. It’s going to be an exciting day!
Right Channel Panatela Wiring Updates
First I installed the Panatela low & high-frequency speaker cables set from the 300B mono amp to the amp side of the Duelund low & high-frequency external crossovers for the WRSE. I used the same binding post bypass method described earlier.
Next I attached the Panatela low & high-frequency WRSE internal wiring set of cables to the Duelund low & high-frequency crossovers using the same binding post bypass method.
Closeup from another angle (above).
With the Panatela installed on the WRSE side of the Duelund low & high-frequency crossovers, now it’s time to pull the back off the right-channel Westminster Royal SE loudspeaker and get to work – more to come!
Thanks for stopping by!
I was excited to the see the package arrive from Mark Coles containing the custom internal Westminster Royal SE Sablon Audio Panatela wiring harness that Mark made for the Duelund-WRSE Project. These are the exact same custom Panatela Special Edition Component Speaker Cables that Mark optimized for the WRSEs with Paul Mills’ input that I reviewed in the September/October 2012 Issue 63 of Positive Feedback Online.
I was pretty much blown away by the Panatela Special Edition component speaker cables, saying “I think you will be astounded with the final results just as I was. The Panatela Special Edition Component set of speaker cables has completely reset what I thought was possible from a set of speaker cables. Very enthusiastically recommended!”
Mark’s suggestion of using the Panatela SEs as the internal wiring harness for the Westminster Royal SE loudspeakers and donating a set for use in the Duelund-WRSE Project completely blew me away! Thank you Mark! I recommend you go back and re-read that article to get the fully story on the Panatela SEs so you can better appreciate the full implications of using the Panatela SEs as an internal wiring harness for the Westminster Royal SE loudspeakers (it’s a big deal!)
When Mark talked to Paul Mills about optimizing the Panatelas to the WRSE, it turns out that the resulting cables work well in broad range of contexts. Mark asked me if I’d clarify about how he goes about optimizing the Panatela cables to your particular speakers, so here you go in Mark’s own words: “I’d be grateful if you could clarify in your review about the Panatela speaker cables, as some people have written to me asking about customisation. The bass cable you have is my usual single wire speaker cable and the tweeter one is derived from that. The latter isn’t unique to the Tannoy but suits most systems where only the tweeter is driven off the HF binding posts. In cases where the midrange driver is also tied to the HF binding posts, I bulk out the conductor area with more ohno cast copper.”
If you haven’t already read the earlier post about prepping the WRSE for the Duelund external crossover you might want to go back and read that now too. In that post I describe opening up the big WRSEs and removing the stock binding posts, disconnecting the stock high-frequency and low-frequency crossovers, removing the stock wiring harness, etc.
To get started on installing the Panatela WRSE wiring set, I removed the back panel from the Westminster Royal SE loudspeakers so I could remove the 47 Labs wiring set that I used to prototype the direct driver connections we are using for the internal wiring.
I first detached the 47 Labs wires that I used for the yellow HF+, green HF–, and ground wire from the tweeter connections, and then pulled them down through the routing holes and out of the cabinet.
I then removed the internal plywood structure that seals the bass horn and the driver so I could remove the 47 Labs wires I used for the brown LF + and the blue LF – connections. I labeled the wires with the Peavey color-coded microphone tape so I wouldn’t get them mixed up.
I then pulled the low-frequency wires through the connector hole and then sealed the hole with Blu-Tack. Then I set the the internal plywood structure that seals the bass horn and the driver back in place.
The Panatela low & high-frequency cables sets are shrink wrapped on the crossover end, so I reverse routed them from the external Duelund crossover through the binding post holes in the Westminster Royal SEs.
Through the binding post holes in the Westminster Royal SEs …
… and up through the cabinet routing channels.
As I mentioned in an earlier blog post, the color coding scheme Tannoy uses for the internal wiring follows this convention:
Brown LF +ve (this is the red leg of the Panatela low frequency cable), blue LF –ve (this is the white leg of the Panatela low frequency cable), yellow HF +ve (this is the red leg of the Panatela high-frequency cable), green HF –ve (this is the white leg of the Panatela high-frequency cable), and the green/yellow Earth.
I connected the low frequency cables to the driver leads with WBT 8 AWG crimp sleeves.
The blue LF –ve lead from the driver is crimped to the white leg of the Panatela low frequency cable.
Then the brown LF +ve lead from the driver is connected to the red leg of the Panatela low frequency cable …
Next I connected the ground using a dab of WBT silver solder …
Next I soldered the HF leads with a dab of WBT silver solder …
After I got the cables attached to the driver, I tightened down the internal plywood structure that seals the bass horn and the driver, then secured the cables with a little Blu-Tack, and put the back panel back in place on the WRSE.
To the crossover …
Here’s a couple of photos of the binding post bypass (binding post used as a clamp only, and is not in the signal path). The leads from the crossover are inserted into the binding posts with a little wire on each side exposed so there is good contact with the spade connectors.
Then the spade connectors from the cables are inserted and tightened down on the bare wire from the Duelund crossover.
One speaker completed and one to go.
That’s it for tonight, and tomorrow I’ll get the other speaker wired up with Panatela internal wiring, then I’ll report back on the results.
Stay tuned – more to come soon!
As I mentioned in my last progress report about the Duelund – Westminster Royal SE Project, my buddy Dave and I made some real progress putting the isolation bases together that the Duelund crossovers are mounted on. Dave brought in the finished frames to the office yesterday, I gave their newly lacquered finish time to harden for a day, and tonight I added the quartz fill and placed the walnut top plates with the Duelund components mounted on them into the frames, and voilà – a pair of Duelund outboard crossovers for the Westminster Royal Special Edition are born!
In case you’re just tuning in, the chassis design for the crossovers was inspired by the designs of Mr. Ken Ishiguro of Acoustic Revive fame, and I chose to base the chassis design for the Duelund crossovers on the Acoustic Revive RST-38 Quartz Under-Boards, which I reviewed in Chapter 7 of The Acoustic Revive Chronicles, and just really like a lot.
The main difference between the Duelund chassis Dave & I built and the RST-38 is the size – the Duelund chassis needed to be larger to fit the huge Duelund components on – and the top plate is solid walnut instead of a laminate, and the frame is maple. Below is a couple of photos of one of Dave’s maple frames in unstained form next to an ink stained frame.
After Dave did the glue up and sanding of the frames, he used an India ink to dye it. Dave said, “Although any stain or dye would work, but to get a jet black finish, India ink or a black acrylic would be needed. The acrylic would not show the grain as well, however.”
After Dave did the dyeing with the India ink, he did a light sanding because the ink is water based and will raise the grain a bit. Dave chose a clear gloss wipe-on polyurethane finish and put 6 coats on the frame. Dave lightly sanded between each coat with progressively finer paper each time.
Dave told me, “Although the bottom will not be seen, it’s important to at least put a coat or two of finish on it as well to eliminate the possibility of warping. You want moisture content of the wood to be the same throughout the wood.”
In the meantime I took the binding post blocks Dave made, and installed them on the walnut top plates along with the Duelund components. (below)
Duelund components are installed on the top plates below. They’re all wired up nicely with the Neotech wire (silver on the high-frequency section, copper on the low-frequency section).
After getting home from the office with Dave’s frames I added in some quartz into each frame.
I think the isolation platforms turned out really well, with the walnut top and ink-stained maple sides really complementing the appearance of the Duelund components.
Many thanks to Dave for the terrific work he did on the isolation bases!
Next I’ll be installing Mark Cole’s Panatela internal wiring harness into the Westminster Royal SEs. Mark’s working on them right now so figure about a week or so.
Ok, that’s it for now. Much more to come!
Thanks for stopping by!
The last time Ron stopped by it was a real treat to listen to his vintage Harmon-Kardon Citation II and Citation V amplifiers, as well as his beautiful deHavilland 50A mono amps (new at the time). Man what a day we had listening to those fine amps! It was a Hi-Fi celebration! Harmon-Kardon Citation II [...]
Over the last couple of weekends I have made quite a bit of progress on the Duelund-WRSE Project. Last weekend my buddy Dave and I worked on the final chassis design for the outboard Duelund crossovers, and we went into Dave’s woodworking shop to get the chassis started and made a lot of progress. As I [...]
I’ve been listening to the breadboarded versions of the Duelund crossovers on the Westminster Royal SE’s this week, in the evenings after I got home from the office, and man, what a revelation! I decided to take today off and get some more work done on Duelund-WRSE Project. Before getting started on what I need to [...]
I just finished up installing the other Duelund crossover on the right Westminster Royal SE, so now I have a stereo pair up and running. Not bad progress for a weekends worth of work! I was able to improve the layout of the right channel pair of Duelund crossovers and make it quite a bit more [...]
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Stephaen sent an early morning email: “I’m going to stop at the El Fat Cat Grill taco truck and get us lunch, and I’ll meet you and Pete at your place at noon.” While the El Fat Cat Grill is actually a taco truck, referring to it as ‘taco truck’ is like referring to the [...]
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