Location: Goa, India
Posts: 143
I'm Denzil.
Location: Goa, India
Posts: 143
I'm Denzil.
https://www.instagram.com/elsewheregoa
Hi Denzil,
Cheers, they do. Nope, hard-wired sounded MUCH better! All the switched did was add unnecessary complication and distortion to the signal. The slope and energy controls aren't really needed, outside of use in a studio, if the circuit and system is right (and of course room)
Marco.
Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new, by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!
Also **SAY NO** to unjust 'vaccine passports' or certificates, which are totally incompatible with a FREE society!!!
Location: Goa, India
Posts: 143
I'm Denzil.
Thanks Edward,
Regarding your questions about my cabinet design, I went through all the designs in hilberink in great detail. And it was hilberink that was hugely inspirational and pointed me in the right direction (as a complet novice). But it was mainly the internals and the technical bits about speaker cabinet design, internal bracing, cabinet volume, dimensions etc., which I picked up from there. In particular these :
https://www.hilberink.nl/codehans/tannoy30.htm (2 pages)
https://www.hilberink.nl/codehans/tannoy107.htm
http://www.44bx.com/tannoy/mods.html
Then I had to take whatever I learned from there and modify it to suit my constraints, mainly in terms of size. To complicate matters, I was not sure if I wanted to opt for a Aperiodic shelf (Lockwood inspired)
or simple ported (as Tannoy engeneers and drawings suggest). So I did both !!!put in an Aperiodic shelf and ALSO 3 ports, 4 inches x 10.5 inches, tuned to 29 Hz. I thought I would first hear what they sounded like with the Aperiodic shelf + the tuned ports (which I know is not usually done). Then I would experiment with taking the tubes off the ports so that they turned into simple Aperiodic cabinets. And then also experiment with taking the felt off the Aperiodic shelf and check what they sounded like as simple ported cabnet tuned to 29 Hz. However, Covid 19 and social distancing has put everything on hold. At the moment I have the shelf and the ports. And they actually sound very good, much, much better that the Lancaster cabinets they were originally in. I will experiment further without the shelf and just tuned ports and later without the tubes and just the Aperiodic shelf without the 19.5 inch tubes.
So that was as far as the technical aspect goes. But when I came to aesthetics, nothing which I saw on the net (D.I.Y projects) really appealed to me. But I did like the aesthetics of some some of the modern Tannoy speakers. Especially the TANNOY CANTERBURY
And the TANNOY GRF
upload pics online without account
But one looked too boxy and one looked too modern to me. So I tried to use elements from both to make my cabinets which to me look not too modern and have some character and look like Tannoy's.
large image upload
And I'm happy with the results. But it wouldn't have been possible without the wonderful craftsmanship of the simple village carpenters who I worked with, who I have the greatest respect for.
Please start working on your cabinets now
Denzil
Last edited by Denzil; 30-05-2020 at 18:39.
https://www.instagram.com/elsewheregoa
They look absolutely stunning, Denzil - and no doubt sound it, too!
Now for my (rather shabbier) mid-1960s, rosewood coloured, formica-covered 'wardrobes', equipped with castors and side-handles...
Well, they were mainly used in studios! Sound bloody good though, on the end of the valve amp in my avatar. Yes, with simply the standard Lockwood Aperiodic shelf, they sound best (in my smallish room), right into the corners and up against the back wall, then heavily toed-in towards the listening position)
Mana Acoustics 'Soundbases' are used, originally intended to support huge Krell amps.
*Some* of my physical music collection on CD and vinyl):
Card table and computer belong to my wife, as during lockdown she's currently using the room to conduct ZOOM meetings for work, and likes having that backdrop of vinyl!
I have a separate movies/streaming system downstairs, with 3 x 3TB hard-drives full of choons!
Marco.
Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new, by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!
Also **SAY NO** to unjust 'vaccine passports' or certificates, which are totally incompatible with a FREE society!!!
Location: limerick
Posts: 223
I'm charles.
@fatmarley: Hi matt, interesting. To get these changes, just how much did you alter the ESR values? When you say the frequency response is changing, what is it you see? Is it the amplitude, the slope of the roll off or the knee?
Barry, yes the different ESR will change the Q but how significant is it and can you hear it? Sure in a feedback circuit it can be important but we are talking about speaker crossovers not RF.
I have gained most of my theory on XO and speaker design by studying articles from the JAES and books and papers by Vance Dickerson, Joseph D'Appolito and other luminaries like Sigfried Linkwitz and never have any of them brought the capacitor's Q nor ESR into the discussion.
I use Omnimic V2 to measure, and notice a small difference by drawing the curtains in the frequency response and CSD yet see no difference at all when replacing caps. Hence my prior comment about ESR being a non-issue.
Barry you seem more interested in disagreeing with me than addressing the original posters question.
I was agreeing with Matt (fatmarley). The theory is just as applicable at audio frequencies as it is to, say, RF. I did say the effect on frequency might be small; it all depends on the Q values achieved.
I cannot address the OP's question as I have no knowledge of Tannoy speakers, or of their crossovers.
Barry
Location: limerick
Posts: 223
I'm charles.
Hi Marco,
Interesting to see you employing Duelund resistors. I have not yet got around to trying them and really would like to. May I ask you if you compared them to others and what your findings were?
In the pics I posted of a recent XO rebuild there is a Powertron resistor which is a Vishay foil. I find it extremely clean and detailed but not tolerant of poor recordings. But if there is something better?
Location: Goa, India
Posts: 143
I'm Denzil.
Cheers, guys. I'll get to these posts properly later. Bit busy just now.
However, Denzil, I believe that they're 220 litres. I'll get the dimensions for you later. Yes, you could say that they're 'chunky' One of the reasons I think the Lockwood Major cabs sound so good with 15" Tannoy DCs is their wide-baffle approach.
Not exactly 'room friendly' in size for your average UK lounge (but then they were never meant to be), but to my ears, their wide-baffles seem to allow the internal 15" drivers to 'breathe' better, and this manifests itself in the sheer scale and power of the bass delivery - it's palpable and really quite something when reproducing the right material, such as the sheer gravitas or 'swell' of an orchestra in full flow, or the kick-ass impact of dub-reggae bass or hip-hop!
It can be a truly 'visceral' experience, somewhat like being at a gig or live concert - or at least a convincing snapshot of such.
Anyway, more later, including I promise, Charles, some resistor chat!
Marco.
Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new, by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!
Also **SAY NO** to unjust 'vaccine passports' or certificates, which are totally incompatible with a FREE society!!!