New (to me) amp: McCormack DNA-125

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  • Tony MTony M Posts: 3,750
    edited January 11
    Here is what a minute of testing shows on two systems of mine with amps.

    I saw my NAD Int. is a C370. Not a 372.. sorry.

    I tested the 555II first. with a Adcom GTP-450 Pre.
    The amp runs silent.
    The pre has issues of bleed through. When you turn the pre on, the tuner is automatically shown in the window.
    I selected the CD source. I turned the Vol. dial to 11:00. I put my ear toward a tweeter. I heard a faint, very faint noise but not hiss. It is even lower than a hiss but then again, my hiss hearing isn't what it used to be either. I got to an inch and it was the radio playing. I couldn't make out any music or words but it was def. the FAINTEST of what a song would sound like if you took it to the weakest level before zero sound. But it was there. Picture the tiniest radio boombox you could imagine. O picture a boombox a mile or more away from you and you know it's playing and you concentrate and can just hear something that sounds like it's coming from it. This is that sound. ;)
    I switched to Video 1. Same very faint noise. same vol. vvvv
    I switched to Video 2. Same very faint noise. Vol. at 11:00 to 12:00
    I switched to Video 3 / Aux. Whoa...NO NOISE. that shocked me. Why not be like the rest? Wierd!

    Now to the big rig.

    Turned on the NAD. Of course a little soft click at turn on.
    NAD pre. comes on automatically. Vol. at zero.
    Turned the pre to CD and turned on CD player. Vol. to 11:00.
    No hum at all from the amp.
    I go to my SRS2's. No noise or his at all.
    I switch to Aux. since my TT is on those inputs through a Phono pre-amp.
    I see the pre isn't on. I've unplugged it the last Lightning storm and I don't want to move some stuff to plug it in right now.

    I will def. test things with emphsis on unit hum and speaker hiss OR radio bleed in the future.

    Like I said, I don't want to know there is hiss in my tweeters IF I spent a lot of $$$ on something that permits it to exist. Now I buy everything secondhand and have gotten GREAT deals on things and speakers. I can live with VERY SLIGHT NOISE if I can't hear it from 1" or so from what's making it. I'd try to find out if there is a perticular thing making it and then KNOW exactly which component needs to be replaced if it gets too loud in the future. I have tinitus the past 5 months or so. It sucks. So maybe I wouldn't hear a hiss if there was one at this Frequency in my hearing. BUT the ringing does stop for a second when it wants to and then back to the BS. 24/7.

    I'm def. NOT OCD personality. I used to be with dust and dirt in the house but I've mellowed over time due to age and the bad 10 years. I'll still wash my hands after picking up a little dust ball off the wood floor. Dust Mites you know. ;)

    That noise, like a very tiny radio playing, was coming from those Cerwin Vega's I refoamed a few months ago. They have horn teeters and are very efficient. It doesn't take much to get them loud. So to have the lowest of noise coming from that tweeter shows the bleed through from the Adcom pre is very, very low. But it IS bleeding the tuners sound to some other sources.

    Pretty interesting!



    Most people just listen to music and watch movies . I am glad to be a part of a select group that tries to take our auditory and visual senses to a higher level: we EXPERIENCE them.... GOT SDA?... Got TFM ?
  • ClipdatClipdat Posts: 904
    edited January 11
    That's interesting that you didn't hear any hiss from the tweeters or transformer hum from the NAD. Sounds like you got a high quality unit there.

    Oh also that the 555II had no hum. Go ahead and drop that in the mail to me if you would.
    NAD C 316BEE, Marantz cd6004, Rotel RCD-1072, Sony SCD-CE595, Polk Audio LSiM 703
  • Tony MTony M Posts: 3,750
    edited January 11
    Got it from a Pawn Shop YEARS ago and it is like new. I've been using it pretty much since I got the set, I guess I've kept the guts energized and didn't let them get dried out. Man did it sound BEAUTIFUL when I switched to tuner and turned the vol. up a bit. Those SRS2"s are MAGNIFICENT! Thank you POLK AUDIO. <3
    Most people just listen to music and watch movies . I am glad to be a part of a select group that tries to take our auditory and visual senses to a higher level: we EXPERIENCE them.... GOT SDA?... Got TFM ?
  • tonybtonyb Posts: 28,027
    Slight hum or hiss is not a trait of what makes a piece quality or not. Some just by design will have a harder/easier time with it's playmates and cabling hooked up to it. Too many variables with hum or hiss to blame one thing.
    ERA D-5
    B&K 1403
    Cary Xciter dac
    Joule LA-100
    SVS SB-2000 SUB
    Sony 4k bdp
    Sony 4k 55 850c
    FX 500 surround
    Acoustic zen Satori SC's
    Pioneer elite vsx21
    Sonos-Cullen mod.
    Audio Metallurgy GA-0 digital
    PS Audio Quintet
    Analysis Plus crystal ovals
    Acoustic zen Matrix 2's IC
    Wireworld eclipse 7 Ic's
  • DSkipDSkip Posts: 13,745
    edited January 11
    F1nut wrote: »
    It's perfectly normal to hear a slight hiss with your ear an inch or two from a tweeter. When using tube gear it's a guarantee you will hear it.

    No guarantee on tube gear. That is one aspect that blew me away (along with several clients) with the MastersounD gear. No hiss, no hum... even the background is black. I've now heard a half dozen different amps in my house and they all share this same quality.

    I would expect most, if not all tube amps produced in China to have some form of hum or hiss. Companies that build quality transformers its not as black and white on.
    audiothesis.com/

    Speakers: Harbeth: P3ESR, 30.2, SHL5+; Usher: CP-6311, Be-10, T-515; Rosso Fiorentino: Elba, Fiesole, Volterra; Polk: T50, Signature S60, S55, S35, S30, S20, S15, RTA 15tl, Sonner Audio Allegro Unum
    Preamps: Shuguang S200MK, Dayens Ampino, Parasound P5
    Amps: Shuguang S845MK, Dayens Ampino Monoblocks, Parasound A23
    Integrateds: Dayens Ampino, Triode Corporation TRV-88SER, MastersounD: Dueventi, Compact 845, Evolution 845; North Star Design Blue Diamond
    Sources: AURALiC Aries, AURALiC Altair, Denon HEOS Link, North Star Design: Magnifico, Supremo, Incanto, Intenso, Venti
    Cabling: Wireworld
    TV: Sony XBR-75X940C
  • Tony MTony M Posts: 3,750
    Clipdat wrote: »
    That's interesting that you didn't hear any hiss from the tweeters or transformer hum from the NAD. Sounds like you got a high quality unit there.

    Oh also that the 555II had no hum. Go ahead and drop that in the mail to me if you would.

    I have 3 of them now. I could.

    What YOU need is the Nelson Pass designed Adcom GFA-555 original.
    Most people just listen to music and watch movies . I am glad to be a part of a select group that tries to take our auditory and visual senses to a higher level: we EXPERIENCE them.... GOT SDA?... Got TFM ?
  • StevieBStevieB Posts: 216
    edited January 11

    deleted
    McCormack DNA-1 Amp, Parasound Halo P5 Pre Amp, Denon DVD 2900 CD player, Adcom GDA 700 DAC, VPI Traveler TT with Denon 103R cartridge, Lounge Audio MKiii phono pre and Copla SUT, Polk SDA SRS 3.1 TL speakers, Tributaries series 8 IC's and speaker cable.
  • StevieBStevieB Posts: 216
    edited January 11
    tonyb wrote: »
    StevieB wrote: »
    Sorry to hear about the McCormack. My new to me DNA-1, kicked the Parasound A23's azz all the way from Florida to New Hampshire! B)

    LOL, glad to hear this. I don't push them for no reason. On the used markets now, they are a few steps up from the Parasounds and B&k's we all love. All good amps in their own right too.

    The McCormack sounds very good with the 3.1's. Honestly the best $800 I've spent in a long time.
    McCormack DNA-1 Amp, Parasound Halo P5 Pre Amp, Denon DVD 2900 CD player, Adcom GDA 700 DAC, VPI Traveler TT with Denon 103R cartridge, Lounge Audio MKiii phono pre and Copla SUT, Polk SDA SRS 3.1 TL speakers, Tributaries series 8 IC's and speaker cable.
  • vmaxervmaxer Posts: 4,042
    tonyb wrote: »
    vmaxer wrote: »
    tonyb wrote: »
    StevieB wrote: »
    Sorry to hear about the McCormack. My new to me DNA-1, kicked the Parasound A23's azz all the way from Florida to New Hampshire! B)

    LOL, glad to hear this. I don't push them for no reason. On the used markets now, they are a few steps up from the Parasounds and B&k's we all love. All good amps in their own right too.

    I have 2 of them although only using the deluxe.

    Have an Adcom, B&K reference, and the other McCormack sitting on a rack.

    Sitting on a rack ??
    Send the McCormack to me and I'll let it sit on my rack actually doing something. :) :D

    Send me a filled medium envelope.

    B)
    Pio Elete Pro 520
    Panamax 5400-EX
    Sunfire TGP 5
    Micro Seiki DD-40 - Lyra-Dorian and Denon DL-160
    PS Audio GCPH phono pre
    Sunfire CG 200 X 5
    Sunfire CG Sig 405 X 5
    OPPO BDP-83 SE
    SDA SRS 1.2TL Sonicaps and Mills
    Ctr CS1000p
    Sur - FX1000 x 4
    SUB - SVS PB2-Plus

    Workkout room:
    Sony Bravia XBR- 32-Inch 1080p
    Onkyo TX-DS898
    GFA 555
    Yamaha DVD-S1800BL/SACD
    Ft - SDA 1C

    Not being used:
    RTi 38's -4
    RT55i's - 2
    RT25i's -2, using other 2 in shop
    LSI 15's
    CSi40
    PSW 404
  • F1nutF1nut Posts: 38,502
    edited January 11
    DSkip wrote: »
    F1nut wrote: »
    It's perfectly normal to hear a slight hiss with your ear an inch or two from a tweeter. When using tube gear it's a guarantee you will hear it.

    No guarantee on tube gear. That is one aspect that blew me away (along with several clients) with the MastersounD gear. No hiss, no hum... even the background is black. I've now heard a half dozen different amps in my house and they all share this same quality.

    I would expect most, if not all tube amps produced in China to have some form of hum or hiss. Companies that build quality transformers its not as black and white on.

    It's not the trannies that make the hiss, it's the tubes, commonly called tube rush. I don't know how a tube amp would not have it.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


  • tonybtonyb Posts: 28,027
    vmaxer wrote: »
    tonyb wrote: »
    vmaxer wrote: »
    tonyb wrote: »
    StevieB wrote: »
    Sorry to hear about the McCormack. My new to me DNA-1, kicked the Parasound A23's azz all the way from Florida to New Hampshire! B)

    LOL, glad to hear this. I don't push them for no reason. On the used markets now, they are a few steps up from the Parasounds and B&k's we all love. All good amps in their own right too.

    I have 2 of them although only using the deluxe.

    Have an Adcom, B&K reference, and the other McCormack sitting on a rack.

    Sitting on a rack ??
    Send the McCormack to me and I'll let it sit on my rack actually doing something. :) :D

    Send me a filled medium envelope.

    B)

    Dagos and envelopes are like pb&j....I can send ya one. Can't guarantee what it will be filled with though. :)
    ERA D-5
    B&K 1403
    Cary Xciter dac
    Joule LA-100
    SVS SB-2000 SUB
    Sony 4k bdp
    Sony 4k 55 850c
    FX 500 surround
    Acoustic zen Satori SC's
    Pioneer elite vsx21
    Sonos-Cullen mod.
    Audio Metallurgy GA-0 digital
    PS Audio Quintet
    Analysis Plus crystal ovals
    Acoustic zen Matrix 2's IC
    Wireworld eclipse 7 Ic's
  • nbrowsernbrowser Posts: 7,144
    hrm...may I add to this as I am sitting in the room with my rig. I just did a test, input the CD, 2.1 mode and all that and no signal and put the SR5010 up to what would be reference volume level when a signal is present which is 75 on the display as it counts up, dead quiet. Not bad for a budget system.
    Living room: Samsung UN55KU7000 4K UHD HDR 55 inch TV, Marantz CD6004, Pro-Ject Debut Carbon, Parasound zPhono, Mac Mini, Oppo BDP-93, XBox One S 2Tb, Kenwood DPX792BH car deck for radio purposes, Marantz SR5010 AVR, Parasound HCA-1200II, Front SDA 2 modded with Larrys Rings and RD0-194-1 tweeters, Rear Onkyo SKF-4800 Towers, Center CSiA6, BOOM Tannoy TS2.12 Sub, Audioquest Evergreen interconnects just about everywhere except from AVR to amp, MIT Terminator 4, MIT AVT3 speaker cables with extra terminals covered up Monitor 5 Jr+ in the wings for a center channel.
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