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JBL Audio Legendary Performance

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  #11  
Old 04-11-2020, 01:37 PM
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Joe Joe is offline
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Awesome work and report Dr!
I'm glad you will be enjoying the fruit of these labor now.
Inspiring as well! I want to jump into my little speaker project now.
Congrats and thanks!
J
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  #12  
Old 03-01-2021, 08:51 AM
enelson14 enelson14 is offline
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Greetings, I signed up for this site just to get access to this page, great work! I've got my eye on a set of those same drivers, and I'm thinking about pulling the trigger and performing the same modifications myself. Do you have any notes for the construction of the mounting plates? Dimensions, etc?

Also, is the driver being held up solely by the horn, or is there a support bracket towards the back?
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  #13  
Old 03-01-2021, 10:58 PM
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Masterlu Masterlu is online now
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enelson14... Welcome to AA!
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FLORIDA
MX136, MC1.2KW(10) MC2KW(2), MCD1100, MS750(2) MVP881, C1000C/P/T, MPC1500, HT-2 SUBS(2) HT3F(2) WS350(2) XRT2K, XCS2K, XR27(2) XCS350(2) JL GOTHAM v2 SUBS(2) SILENZIO MUSIC SERVER, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" MOTORIZED SCREEN, CINEMA-TECH SEATING, WW PLATINUM CABLES
Reference System: ACCUPHASE A300 AMPS, C3900 PRE-AMP, DP1000 CD/SACD TRANSPORT, DC1000 DIGITAL PROCESSOR, DG-68 DIGITAL EQUALIZER, T1200 FM STEREO TUNER, PS1230 POWER SUPPLY, HRS-SXR CUSTOM RACK w/ M3X SHELVES, TAD REFERENCE ONE MK2 LOUDSPEAKERS, WW PLATINUM CABLES
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MX150, MC501(2) MC1.2KW(10) MC2301(2) MR88, MVP881, MCD1100, MDA1000, C1000C/P/T, MPC1500, ESOTERIC K-01X 30th ANNIVERSARY (BLACK) SACD/CD PLAYER, G02-X CLOCK, HT3F(2) XRT2K, XCS2K, XR27(2) JL GOTHAM v2 SUBS(2) JL FATHOM F113v2 SUBS(4) SOUND ANCHOR STANDS(2) KALEIDESCAPE STRATO & TERRA SERVERS 80-TB, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" SCREEN, SONUS FABER STRADIVARI, SILENZIO MUSIC SERVER, FORTRESS SEATING, WW PLATINUM CABLES
Analog Rig: CLEARAUDIO INNOVATION WOOD, UNIVERSAL ARM w/ Da VINCI' CART, 2nd UNIVERSAL ARM w/ GOLDFINGER STATEMENT CART, HRS-MXR REFERENCE RACK-GLOSS BLACK w/ M3X SHELVES, AESTHETIX RHEA SIG PHONO-PRE, BRYSTON BHA-1 HEADPHONE AMP, WW PLATINUM CABLES
Reference System: BURMESTER 911MK3 AMP(3), 088 PRE-AMP, 089 CD PLAYER, 100 PHONO PRE-AMP, 948 POWER CONDITIONER, ACCUPHASE DG-68 VOICING EQUALIZER, AVID ACUTUS REFERENCE SP TT, GRAHAM PHANTOM II SUPREME ARM, BENZ MICRO LP-S CART, GRANDIOSO P1X/D1X STACK, G1X RUBIDIUM MASTER CLOCK, N05 NETWORK PLAYER, SILENZIO MUSIC SERVER, HRS-SXR CUSTOM RACK w/ M3X SHELVES, SONUS FABER AIDA SPEAKERS, JL FATHOM F113v2 SUBS(2) SOUND ANCHOR STANDS(2) WW PLATINUM CABLES

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  #14  
Old 03-07-2021, 02:51 PM
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Vintage Pete Vintage Pete is offline
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Quote:
Originally Posted by enelson14 View Post
Greetings, I signed up for this site just to get access to this page, great work! I've got my eye on a set of those same drivers, and I'm thinking about pulling the trigger and performing the same modifications myself. Do you have any notes for the construction of the mounting plates? Dimensions, etc?

Also, is the driver being held up solely by the horn, or is there a support bracket towards the back?
enelson14.....I'm sorry I took so long to respond. I do have a drawing that I made of the mounting plate, but I would caution it is quite specific to this particular horn, and the actual hole locations for my particular L220's for the mounting of the old midrange assembly. And even then, you'll note I ended up machining a small amount off the bottoms of the plate for everything to line up just right.

As to your question on supporting the horns, there is no support bracket in the back. They are pretty much supported by the 4 screws in the front. However, I did take advantage of the existing lower spacer bar to provide additional support across the lower portion of the horn mounting flange.

This portion of my original post discusses this:

I re-used the original wooden spacers. The lower spacer also serves as a clamping support at the bottom of the horn mounting flange. These Horns are quite heavy!!



I can assure that, in this way, the horn mounting is absolutely rock solid.

Another thing to watch is, I've seen two differing versions of the 1217-1290 Horn, one is actually 1" longer (deeper) than the other! I used the "shorter" version, with the front mounting flange. This one inch can mean the difference between getting the back on, or not getting the back on.
Even so, I still had to re-make the back plate, moving the L-Pads up enough to be able to mount the rear cover plate on flush.

I hope this is of some help.....if you need more information, let me know.

I would strongly encourage you to become a subscriber to AA, so we can communicate via PM, as well as many other benefits.

I think this link will take you to the correct page:

https://www.audioaficionado.org/payments.php
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No. 35


Main System: VPI Prime Signature TT in Rosewood, Ortofon Cadenza Black, Stillpoints LP1 V2, McIntosh: MP100, MR78, MCD1000 Transport on Stillpoint Ultra Minis, MDA1000 D/A Converter on Stillpoint Ultra Minis, MS750 Music Server, C40, MC501's (3), Soundcraftsmen: DC2215 Eq/AS1000 Real time analyzer, DBX 3BX II, Carver C9, Nakamichi Dragon, Crown SX724, Crown D-75A (as headphone amp), Sony XBR55X900E 4K TV, JBL L220A's, JBL B460, Sumo Delilah active crossover, WireWorld Silver Eclipse audio interconnects, WireWorld Starlight and Silver Starlight Coaxial Digital interconnects, Wireworld SuperNova 7 Toslink digital interconnect, WireWorld Aurora 7 and Silver Electra Power cords, Wireworld Silver Eclipse 8 speaker cables, Terk AF-1 Powered Antenna, Oppo UDP-205 4K Blu-Ray Player, Bryson BUC-1 USB Converter, Wireworld Gold Starlight XLR Digital interconnect, PS Audio Direct Stream Power Plant 12 on Stillpoint Ultra Minis, PS Audio Dectect, FuruTech Flux-50 NCF Inline Power Filter, Add-Powr Wizard EM Field AC Line conditioner; Stillpoint Ultra SS's under (3) McIntosh MC501 Amplifiers

Florida Room/Art Studio System: Harmon Kardon T60 TT/Ortofon 2M Black, McIntosh: MR77, C32, MC2205; Crown Power Line Four, Wyred for Sound DAC-2 Digital to Analog converter, Soundcraftsmen AE2000 Eq, JBL 4313B's, JBL 2241-based Sub, JBL BX63A Active Crossover, Oppo BDP-105D Blu-Ray Player, Samsung 5500 Series 32" Smart TV, Terk AF-1 Powered Antenna

Master Bedroom System: McIntosh: MX120 Theater processor, MC206 6-channel amplifier; MR74 AM/FM Tuner, Oppo UDP-203 4K Blu-ray player, JVC HM-DH40000U D-Theater Digital VHS, Phase Technology PC80 Towers (now used as stands), (2) JBL 4401's, (1) JBL Studio 6IW speaker, (2) JBL Studio 6IC speakers, Sony XBR-49X900E UHD TV, Panamax 1000 Line Conditioner, (2) JL Audio E110 Subwoofers, Wireworld Solstice speaker cables, Wireworld Aurora Power cords, Wireworld Equinox and Solstice speaker cables and various other flavors of Wireworld and Audioquest cabling

Office System: Marantz 150 Tuner, Crown DL 2, Crown EQ 2, Crown SA 2, Crown D-75A (as headphone amp), McIntosh MCD7009 (as transport), DBX 3BX Series II, Oppo BDP-103 Blu-ray player, JBL 4401's, JL Audio E112 Subwoofer, Samsung 5500 series 32" Smart TV, Wire World Oasis audio interconnects, Wire World Solstice speaker cables, Wyred for Sound DAC-2 DSDse Digital to Analog converter, Wireworld Starlight Coaxial Digital Interconnect, Sennheiser HD800 Headphones, Sennheiser HDVA600 Headphone amp, Wireworld Silver Eclipse Balanced Interconnects, Wireworld Platinum Starlight USB Cable, Add-Powr EAU-2 AC Harmonic resonator

High Resolution Source: HP Omen 17" Gaming Laptop
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  #15  
Old 03-08-2021, 05:58 PM
enelson14 enelson14 is offline
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Excellent! Sounds like I'm moving in the right direction. I've seen two versions of the horn for sale. One has the four bolt mounting flange integral to the front of the horn. The other type seems to be a round horn with some kind of oddly shaped clamp that is a separate piece. Are those the only types? The pair I've been eye-balling appear to be identical to your type. I hope there's not multiple length complications.

I see you have been pleased with the result, but as kind of a technical aside, are there any oddities that would potentially arise from having the perforated diffuser type lens, then a slot lens in front of that? Not that my ears are that sensitive anyway.

I'll check into the subscriber stuff when I get home, I guess I need to do more poking around the forums and checking things out. I haven't really been active on any forums for about 10 years.
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  #16  
Old 03-09-2021, 02:11 PM
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Vintage Pete Vintage Pete is offline
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Quote:
Originally Posted by enelson14 View Post

I see you have been pleased with the result, but as kind of a technical aside, are there any oddities that would potentially arise from having the perforated diffuser type lens, then a slot lens in front of that? Not that my ears are that sensitive anyway.
enelson14....I kind of wondered about this myself. All I can say is that if there is a downside to leaving the perforated screen plate in place, as I did, I cannot detect it. To be honest, I did not try it both ways. It's a bit of work to remove the entire assembly once it is in place....and once I installed it "as is", I was so pleased with it I didn't see a need.

Overall, I've been super pleased. Once I was done with the effort, I never looked back.
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No. 35


Main System: VPI Prime Signature TT in Rosewood, Ortofon Cadenza Black, Stillpoints LP1 V2, McIntosh: MP100, MR78, MCD1000 Transport on Stillpoint Ultra Minis, MDA1000 D/A Converter on Stillpoint Ultra Minis, MS750 Music Server, C40, MC501's (3), Soundcraftsmen: DC2215 Eq/AS1000 Real time analyzer, DBX 3BX II, Carver C9, Nakamichi Dragon, Crown SX724, Crown D-75A (as headphone amp), Sony XBR55X900E 4K TV, JBL L220A's, JBL B460, Sumo Delilah active crossover, WireWorld Silver Eclipse audio interconnects, WireWorld Starlight and Silver Starlight Coaxial Digital interconnects, Wireworld SuperNova 7 Toslink digital interconnect, WireWorld Aurora 7 and Silver Electra Power cords, Wireworld Silver Eclipse 8 speaker cables, Terk AF-1 Powered Antenna, Oppo UDP-205 4K Blu-Ray Player, Bryson BUC-1 USB Converter, Wireworld Gold Starlight XLR Digital interconnect, PS Audio Direct Stream Power Plant 12 on Stillpoint Ultra Minis, PS Audio Dectect, FuruTech Flux-50 NCF Inline Power Filter, Add-Powr Wizard EM Field AC Line conditioner; Stillpoint Ultra SS's under (3) McIntosh MC501 Amplifiers

Florida Room/Art Studio System: Harmon Kardon T60 TT/Ortofon 2M Black, McIntosh: MR77, C32, MC2205; Crown Power Line Four, Wyred for Sound DAC-2 Digital to Analog converter, Soundcraftsmen AE2000 Eq, JBL 4313B's, JBL 2241-based Sub, JBL BX63A Active Crossover, Oppo BDP-105D Blu-Ray Player, Samsung 5500 Series 32" Smart TV, Terk AF-1 Powered Antenna

Master Bedroom System: McIntosh: MX120 Theater processor, MC206 6-channel amplifier; MR74 AM/FM Tuner, Oppo UDP-203 4K Blu-ray player, JVC HM-DH40000U D-Theater Digital VHS, Phase Technology PC80 Towers (now used as stands), (2) JBL 4401's, (1) JBL Studio 6IW speaker, (2) JBL Studio 6IC speakers, Sony XBR-49X900E UHD TV, Panamax 1000 Line Conditioner, (2) JL Audio E110 Subwoofers, Wireworld Solstice speaker cables, Wireworld Aurora Power cords, Wireworld Equinox and Solstice speaker cables and various other flavors of Wireworld and Audioquest cabling

Office System: Marantz 150 Tuner, Crown DL 2, Crown EQ 2, Crown SA 2, Crown D-75A (as headphone amp), McIntosh MCD7009 (as transport), DBX 3BX Series II, Oppo BDP-103 Blu-ray player, JBL 4401's, JL Audio E112 Subwoofer, Samsung 5500 series 32" Smart TV, Wire World Oasis audio interconnects, Wire World Solstice speaker cables, Wyred for Sound DAC-2 DSDse Digital to Analog converter, Wireworld Starlight Coaxial Digital Interconnect, Sennheiser HD800 Headphones, Sennheiser HDVA600 Headphone amp, Wireworld Silver Eclipse Balanced Interconnects, Wireworld Platinum Starlight USB Cable, Add-Powr EAU-2 AC Harmonic resonator

High Resolution Source: HP Omen 17" Gaming Laptop
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