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Thread: Greg Timbers interview.

  1. #1
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    Careful man, there's a beverage here!

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    Senior Member Flodstroem's Avatar
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    Thanks Tom for posting this. Amazing
    Flodstroem

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    Senior Member Ed Zeppeli's Avatar
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    Interesting article. Thanks for posting.

    From the comments Greg describes his system(s) and gives clues to what he looks for when eqing.

    My system consists of the following:
    2-channel:
    Everest DD67000, fully active 4-way
    DEQX HDP4
    DEQX Premate
    Pass Labs XVR1
    Parasound JC1, 4 amplifiers, 1 for each woofer.
    Quicksilver Mono 120, 1 for each large compression driver
    Pioneer Elite A-20, for UHF compression driver
    Pass Labs XP-15 Phono Stage
    Basis Audio Debut Turntable with SuperArm 9 and Dynavector DV-20x
    Tascam DA-3000, Digitizing LP's
    MacMini running JRiver Media Center 22
    PS Audio LanRover

    4 channel, All of the above plus:
    K2 S9900, fully active 2-way
    Pascal M-Pro amps within the speakers
    DEQX Premate for crossover and DSP
    Classe Audio CT-SSP
    Oppo BDP-103
    Oppo BDP-203
    JVC RS-600 Projector
    Stewart Film 110" Firehawk, 2.40:1
    LG 65" OLED

    All speaker cables and audio interconnects are StraightWire Virtuoso
    5 microphone array around listening position shows -3 dB @ 20 Hz and -6 dB @ 48 kHz. The 1/6 oct response of the 5 microphone average is less than +/- 1 dB from my target curve over that range. The system sensitivity (if passive) would be 96 dB for 2.83 v @ 1 m. Since the DEQX uses linear Phase (FIR) crossovers, I have the impulse of each individual transducer and its network aligned to less than 0.1 ms at the listening position. EQ and room correction is done in the DEQX, JRiver and the CT-SSP depending on input and overall system configuration. (Music, Phono, Movie}
    DIY Array, 2242 sub, 4408, 4208, Control 8SR, E120 Guitar cab, Control 1, LSR305.

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    Senior Member rdgrimes's Avatar
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    For posterity, some stereo porn:

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    Senior Member Hoerninger's Avatar
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    Tom1040, thank you for setting a link to this fine interview.
    ___________
    Peter

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    Administrator Mr. Widget's Avatar
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    Thanks Tom... very interesting. It is so nice to hear such a reasoned voice in audio.

    I am still all analog, but am definitely tempted by the power of digital. On a side note, I found it interesting that he also picked the Parasound Halo JC1 amps... they really control these massive JBLs. Two provide unholy headroom, I'm sure he is using two per side simply for individual driver control, but damn! That is insane headroom.


    Widget

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    What's the white thing on the wall above the turntable? Looks too complex to be a simple light fixture.

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    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by JeffW View Post
    What's the white thing on the wall above the turntable? Looks too complex to be a simple light fixture.
    Looks like a lamp to me.


    Widget

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    Senior Member srm51555's Avatar
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    Quote Originally Posted by Hoerninger View Post
    Tom1040, thank you for setting a link to this fine interview.
    ___________
    Peter
    +1

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    Does anyone know what Timbers means by "esoteric discrete stuff"?

    By using FIR filters, amplitude and phase can be manipulated independently so this constraint can be overcome. The hardware in the DEQX is very well implemented indeed, but it is no match for the esoteric discrete analog stuff. Still, the complete amplitude and time correction easily overcomes this handicap and has given me the best of both worlds. I now have all of the detail, dynamics, smoothness and spacial attributes I have been searching for with the ability to do room correction and frequency shaping as I wish. It is a win-win for me.

  11. #11
    Senior Member grumpy's Avatar
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    I read it as high quality/performance analog electronics, with "discrete" normally indicating circuits built from individual parts that each perform a low-complexity function (e.g., a "discrete" op amp is built from individual transistors, resistors, capacitors, etc... vs an integrated circuit version... which can also work quite admirably).

  12. #12
    Dang. Amateur speakerdave's Avatar
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    Bryston crossovers are discrete, but I'm guessing he meaneth Pass Labs.

    I knew a guy, a salesman at Eber Electronics in San Francisco, back in the day. He would sometimes say, "That's good enough for anybody." Comes to mind for some reason.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

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    Senior Member DavidF's Avatar
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    Quote Originally Posted by Mr. Widget View Post
    Thanks Tom... very interesting. It is so nice to hear such a reasoned voice in audio.

    I am still all analog, but am definitely tempted by the power of digital. On a side note, I found it interesting that he also picked the Parasound Halo JC1 amps... they really control these massive JBLs. Two provide unholy headroom, I'm sure he is using two per side simply for individual driver control, but damn! That is insane headroom.


    Widget
    He mentions using 4-way configuration. That could suggest distinct signal feed with a different roll-off on each woofer, perhaps?

    I like the reference to the Pioneer A20 amp to drive the UHF among all the other goodies. I recall him mentioning using a lowly 70's era Kenwood integrated in a similar configuration in one of the earlier 4-way models.

    Also, he is looking pretty fit in retirement, aint he?
    David F
    San Jose

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    Senior Member pos's Avatar
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    Funny to read that he is now using the 045, even in a fully active setup.
    It was disconnected in his former array 1200, but that might be due to the narrower horizontal nominal directivity of the vertical horn that, together with the slot, made the directivity behavior more consistent up to the UHF...

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    Quote Originally Posted by pos View Post
    Funny to read that he is now using the 045, even in a fully active setup.
    It was disconnected in his former array 1200, but that might be due to the narrower horizontal nominal directivity of the vertical horn that, together with the slot, made the directivity behavior more consistent up to the UHF...
    Sounds plausible! That is the main benefit of vertical horn maybe?

    Was he passively aggressively dissing M2 when he said plastic membranes almost never works?

    Funny to read about the FIR-stuff he now uses, and the benefits it gives according to him. Damn, I probably have to get me a couple of OpenDRC again!

    I would really like to play with an DEQX as well. Have you tried it pos?

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