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    "Fast" and "slow" subwoofers: can we put them to bed?

    Here is another explanation from Peter Moncrieff of International Audio Review Opposites in Reactance Consider next reactance, as another example of opposite behavior. Conventional subwoofers have large reactance, plus severe reactance changes, at low frequencies. This...
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    Martin Logan Neolith

    Try (tympani 4 loudness satie) this should work, spelling error
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    Martin Logan Neolith

    I have never had any complaints from neighbors utilizing the rotary sub.
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    Martin Logan Neolith

    Loudness, Tympani 4, Rotary The tympani 4 bass panels when properly braced and frame modified (I bolt the braces down through the floor and each of the two panels are bolted together) can play at very high levels. As I also mentioned, the Tympanis are rolled off below 30 hz which lowers...
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    Martin Logan Neolith

    Martin Logan Summit, Magneplanar Tympani, Rotary sub The effective crossover point for the Tympani bass panels is 250 hz, which works out well with the Summits. Yes, I have one rotary sub which extends up to 25 hz and the Tympani bass is filtered below 30 hz. Doing this reduces distortion...
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    Martin Logan Neolith

    Coherency, huge soundstage My answer to the Neolith hybrid is combining Magneplanar Tympani IV bass panels with Martin Logan Summits (woofers not used) and extend the bass down to 1 hz, with a rotary subwoofer. This results in total coherence, a huge sound-field, bass that has power...
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    Ever try bass traps? You ever put in bass traps and completely remove them?

    ASC tube traps Using ASC tube traps makes a huge difference with bass transients and quality of bass. All corners from floor to ceiling have large bass traps, as well as mid points. Around the entire room I use mid range tube traps, which are 3 feet apart. Midrange clarity is superb and...
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    Summit X revisited

    LL21 (1), it takes a large room (my room is 29'L x 20'W x 11'H) with great acoustics. (2) Many ASC bass and midrange traps around entire perimeter of room. (3) I have the speakers across the long wall, with seating distance 12' away. (4) A huge...
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    Summit X revisited

    Summit and Maggies, TRW Rotary I agree with you on the midrange of the Summits. For bass I disconnect the woofers and use Magneplanar Tympani IV woofer panels and below 25 hz a TRW rotary sub! This combination gives one bass that is truly coherent, powerful, with depth and a huge...
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    Stereo Integrity 24" IB Subwoofer- new displacement king of subwoofers

    TRW-1 Rotary Sub Yes, Bruce Thigpens TRW-1 Rotary Sub
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    Stereo Integrity 24" IB Subwoofer- new displacement king of subwoofers

    I also owned the Hartley 24" subwoofer and used them in infinite baffle installations. The first Hartley sub was built into a closet and provided bass below 40 hz to my Klipschorn system. When I moved into my new home I used two Hartleys built into the floor and that extended the bass...
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    What's the best sounding system(s) you have ever heard that are not your own.

    Apogee Scintilla's, stages with Hill Plasma and two Rotary subwoofers. A huge bank of Krell power amps
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    Infinite Baffle and the Audiophile

    I hope you are successful in the future of integrating a Thigpen Rotary subwoofer into your system. There is, simply put, nothing like this sub. One has to have a lot of space behind the rotary for it to work properly, (I vent it into my basement, which is very large). The enclosure...
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    What's the best subwoofer? REL? JL AUDIO? Velodyne? Wilson? Something else?

    I have also used 2 Hartley 24" subs in a infinite baffle (mounted in the floor). At the time these subs worked quite well, but it is all relative. Comparing these subs to what I now use (TRW-17 Rotary sub) is like comparing a VW to a Porche. Very low distortion, power handling, transient...
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    What is the most highly resolving speaker you have ever heard?

    Plasma The Hill Plasma loudspeaker from 700 hz on up will outperform anything on the market today. Resolution, detail, transients are a so very real, without fatigue (once heard one gets spoiled with other loudspeakers). To this day there is no other loudspeaker except (lansche plasma is...
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    Horns, Horns, Horns

    A dream horn system Has anyone heard this huge horn system.
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    What do you guys think about this approach to building a GREAT room?

    ASC Tube traps I agree using ASC tube traps, but I took the advice from Peter Moncrieff of IAR. Using his methods and my own experience, the acoustics of my room are exemplary. All of the aspects of good sound (imaging, sound-stage, bass that is tight and well controlled, and voice...
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    Wondering about Panel Comparisons

    Velodyne SMS-1 and Eminent Rotary woofer controller I use a Velodyne SMS-1 with different xover frequencies and slopes and chose 180 hz for the Magneplanars. The rotary sub controller is set at 25 hz, 12 db per octave. A Mark Levinson 380S preamp is used to control the level of the...
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    Wondering about Panel Comparisons

    Still my choice Magneplanar Tympani IV,s (modified) with Martin Logan Summits and the unbelievable TRW-17 rotary woofer.
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    Speakers and the genius of the lamp

    Isolation Isolation plays a big part in getting great very low bass and a room that is properly designed to handle that bass is paramount. All my equipment is mounted in sand filled cabinets that are resting on a separate concrete foundation. The lower one's sub goes the greater the...
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    Speakers and the genius of the lamp

    Not necessary to play the rotary at loud levels. I use half its output and organ music is just plain realistic, along with special effects. After 3 years, I have never had any discomfort or ill effects or has anyone at my home with this superb subwoofer. Have heard live pipe organs and...
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    Speakers and the genius of the lamp

    A system that will knock your socks off Martin Logan Summits along side of Magneplanar Tympani IV bass panels and the unbeatable TRW-17 Rotary Subwoofer. Total integration, sound-stage that is immense, low level detail, imaging, and bass that is stunning. Nothing can provide this...
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    magneplanars

    Maggies and Martin Logan electrostaics Magneplanar Tympani IV bass panels (modified) and Martin Logan electrostatic provide not only depth and coherence, but completely disappear. Spica TC-50's and Gallo Nucleus micro's and Martin Logan Logos center channel adds to the realism of space...
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    Planer/Dipole speakers: FAQ

    Planar/Dipole speaker placement and acoustics I have 50 years of experience with acoustics and audio and have had 4 different listening rooms. I owned many types of speakers, from Acoustic Research, Bose, Klipschorns, Electrovoice, JBL Lansing, but Planar/Dipole speakers are just plain...
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    Getting to the bottom of it all

    Hearing is believing I have owned the TRW-17 rotary subwoofer for almost 3 years in combination with Magneplanar Tympani IV bass panels (modified) and the low bass is so clean, powerful and realistic. Once heard there is no going back to conventional subwoofers. The lower perceived...
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    Bad setup, bad room, or sensitive ears? Subs are just never from the "same cloth"!

    coherent bass Combining Magneplanar Tympani IV bass panels (modified) with the Eminent Technology rotary woofer is a match that is both powerful and totally coherent. Consider next reactance, as another example of opposite behavior. Conventional subwoofers have large reactance, plus...
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    Planer/Dipole speakers: FAQ

    ASC Tube traps with dipole speakers I have Martin Logan Summits along side of Magneplanar Tympani IV bass panels. ASC tube traps are placed behind these dipole speakers and above on the wall. The speakers are placed from 6' to 10' from this wall and this large distance to the wall behind the...
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    Which subs are you using for your HT system.

    This is what the hobby is all about, and you have met your goal. I have been an audiophile for 50 years and enjoy sharing my ideas and goals with others. One of the rotary subwoofers best attributes is transient response. This area is the most difficult for conventional woofers to perform...
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    Best Isolation Systems for Amps

    The way I isolate vibration from all equipment I have a separate control room with a concrete floor. My large equipment cabinet is filled with sand between all shelves. Also a separate rack for power amplifiers, stands in this control room. This works out quite well for isolation of...
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    The 12 Most Significant Loudspeakers of All Time

    Getting a better match with plasma This is what was done to alleviate the mismatch between the plasma transducer and existing woofer. Replace the midrange and woofer on Hill Plasma speaker with (Apogee Stages, from 700 hz down to 200 hz, and Apogee Scintillas from 200 hz down to 25 hz. A...

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