The Official JTR Speakers Subwoofer Discussion Thread!

Jack1949

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Jun 9, 2017
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282
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Loveland, Colorado
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Yamaha RX-A3040
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KING 5-CHerry Amp - Digital Amplifier Co.
Universal / Blu-ray / CD Player
Oppo BDP-103D
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JTR 210RT
Center Channel Speaker
JTR 210RM
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Ascend Acoustics Sierra Towers with RAAL
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Polk Audio RT55i
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Polk Audio RT35i
Subwoofers
Dual JTR 118HT
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miniDSP 2x4 HD
Video Display Device
Samsung UN60H6350
I also found the LF Adjust function to be a great help. I listen mostly to music and for a long time I ran with LFA set to max on my 118HT subs, but bass heavy songs would be overwhelming. I dialed back the LFA to just below the midpoint and that resolved the problem. The subs still produce very strong bass, but much more controlled and detailed.
 

Todd Anderson

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Jan 20, 2017
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9,696
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Balt/Wash Metro
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StormAudio ISP.24 MK2
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Emotiva XPA-5
Additional Amp
Emotiva XPA Gen3 2.8 multichannel amp
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Denon X8500H
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THX ONYX
Computer Audio
AudioEngine A2+
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Kaleidescape TERRA, OPPO UDP-203, Panasonic UB9000
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iFi Audio Zen Blue
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Qobuz, TIDAL, Spotify, ROON
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GoldenEar Technology Triton One.R
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GoldenEar Technology SuperCenter Reference
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SVS Ultra Surround
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SVS Ultra Bookshelf
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SVS Prime Elevation x4 (Top Front, Top Mid-Front)
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SVS Prime Elevation x4 (Top Middle, Top Rear)
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dual SVS SB16s + dual PSA XS30s
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Behringer 1124p; Aura Bass Shaker Pros; SuperSub X
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Seymour Screen Excellence, Enlightor NEO AT Screen
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JVC NX7
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LG Electronics 65-inch B6 OLED, Sony 65-inch X900F, ZeroSurge 8R15W x 2, ZeroSurge 2R15W x 2
This Captivator 2400XS hasn't launched yet, right?
 
Joined
Apr 25, 2017
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26
Location
Union Grove WI
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Theater - 2x Lab Gruppen fp1000Q
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2 Channel - Cherry Amp Company, Megaschino monos
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JTR
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JTR
Surround Speakers
JTR
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JTR
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JTR
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Cherry Amp Company - DAC DAC 2
Screen
Seymour - NEO

Sonnie Parker

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StormAudio ISP Elite 24 MK3 Processor
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McIntosh MC1.25KW Monoblock Amps
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StormAudio PA 16 MK3
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ROON Nucleus One
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qobuz
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Zero Surge 8R15W-1
Zero Surge 2R20W
Front Speakers
RTJ 410
Front Wide Speakers
JTR Neosis 110HT
Center Channel Speaker
MartinLogan Focus C-18
Surround Speakers
JTR Neosis 210RT
Surround Back Speakers
JTR Neosis 210RT
Front Height Speakers
JTR Neosis 110HT-SL
Middle Height Speakers
JTR Neosis 110HT-SL
Rear Height Speakers
JTR Neosis 110HT-SL
Subwoofers
JTR Captivators - 4000ULF-TL x2 + 2400 x6
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Sony 98X90L
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AVA Cinema
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AudioQuest - Various
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SilentPower LAN iPurifier Pro (for Nucleus One)
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Salamander Synergy Equipment Stand
VTI Amp Stands for the Monoblocks
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HIFIMAN HE1000se
Unique Melody Mest MKII
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Accuphase E-280 Integrated Amp
Technics SL-1210GR2 Turntable
Ortofon 2M Blue Cartridge
KLH Model Three Speakers
Zero Surge 8R15W-1
JTR time... about to let all my SVS subs go and get down to some serious subwoofin' with JTR Captivators. Haven't decided on which ones or how many, but my initial thinking is 6 of the 2400 ported units. I'll be discussing it with Jeff tomorrow and hopefully figure out which direction I'll go.

DLART plays a factor in this, as it can defeat "room gain," which can be a result of decay. Example is my subs have extension down to 14Hz (-3dB) with the HTP-1 DLBC, but with my MK3 DLART, there is a sharp drop off at 20Hz. Measuring any of these subs nearfield shows significant dropoff below 20Hz that is gained back at the listening position due to room gain when using the HTP-1 DLBC, which is likely decay that DLART is eliminating using the MK3. No proof at this point, but a reasonable theory of why the measurements are different. I haven't been noticing the issue with music, which is mostly what I have been testing the MK3 with since I've had it, but here lately I've started testing some movies with bass and found the subs to be lacking on sub-20Hz scenes.

It seems like the subs actually need to be able to produce substantial output below 20Hz without room gain to get the best from DLART, and I think JTR's 10Hz tuned subs are probably the best option to get where I'd like to be on movies, yet still excellent on music.
 

Sonnie Parker

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Joined
Apr 2, 2017
Messages
5,662
Location
Alabama
More  
Preamp, Processor or Receiver
StormAudio ISP Elite 24 MK3 Processor
Main Amp
McIntosh MC1.25KW Monoblock Amps
Additional Amp
StormAudio PA 16 MK3
Music Server
ROON Nucleus One
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player
Streaming Equipment
Kaleidescape
Lenovo X1 Carbon
Apple TV 4K
FireCube 3
Streaming Subscriptions
Lifetime Roon Subscription
Tidal
qobuz
Netflix
Amazon Prime
Other Equipment
Zero Surge 8R15W-1
Zero Surge 2R20W
Front Speakers
RTJ 410
Front Wide Speakers
JTR Neosis 110HT
Center Channel Speaker
MartinLogan Focus C-18
Surround Speakers
JTR Neosis 210RT
Surround Back Speakers
JTR Neosis 210RT
Front Height Speakers
JTR Neosis 110HT-SL
Middle Height Speakers
JTR Neosis 110HT-SL
Rear Height Speakers
JTR Neosis 110HT-SL
Subwoofers
JTR Captivators - 4000ULF-TL x2 + 2400 x6
Video Display Device
Sony 98X90L
Remote Control
AVA Cinema
Cables
AudioQuest - Various
THX PixelGen HDMI
Pangea Power Cables
Custom Cables
Satellite System
Dish Joey 4K
Network/Internet
C-Spire 1Gig Fiber
Omada OC300 Controller
Omada ER8411 10G Router
Omada SG3218XP-M2 10G/2.5G Managed Switch
Omada SG2210XMP-M2 10G/2.5G Managed Switch
SilentPower LAN iPurifier Pro (for Nucleus One)
Other Equipment
Salamander Synergy Equipment Stand
VTI Amp Stands for the Monoblocks
Headphones/IEMs
HIFIMAN HE1000se
Unique Melody Mest MKII
Headphone DAC/Amp
Eversolo DMP-A6
RME ADI-2 DAC FS
HIFIMAN Goldenwave Serenade
Whole House System
HEOS System
Home-150 Speaker x6
Samsung S9 Tablet w/ HEOS
Office/Study System
Office System
Dell Precision Computer
Roon Networked
Vanatoo Transparent One Encore Plus Speakers
Secondary/Additional Room System
AV Test Room System
NAD M33 Streaming DAC Amp
MartinLogan Motion XT F200
JTR Captivator RS1
miniDSP EARS
Zero Surge 8R15W-1
Zero Surge 2R20W
Dell Optiplex
Roon Networked
Secondary/Additional Room System
Sunroom System
Denon AVR-X1800H HEOS Receiver
Soundfield Custom Speakers
Dayton Audio IO8XTW Outdoor Speakers
Roon Networked
Dish Joey
JVC 37" TV
Secondary/Additional Room System
Cabin System
Onkyo TX-SR805 Receiver
Infinity Primus P163 Speakers
RSL Outsiders Outdoor Speakers
Shield TV Pro
Sony 55" TV
Secondary/Additional Room System
Vinyl Room
Accuphase E-280 Integrated Amp
Technics SL-1210GR2 Turntable
Ortofon 2M Blue Cartridge
KLH Model Three Speakers
Zero Surge 8R15W-1
Got six of the JTF Cap 2400 units ordered with Jeff today... gotta start selling off SVS subs now.
 
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