My humble review of the Benchmark AHB2 and LH4

Discussion in 'Audio Hardware' started by Tone?, Jun 1, 2021.

  1. Helom

    Helom Forum member

    Location:
    U.S.
    Just accept that he doesn’t like your dam AHB2s little bro. :p :winkgrin:
     
  2. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco

    Hahahaha

    listen lil bro. The AHB2 rocks.


    Lol
     
    ls35a, timind, Glmoneydawg and 2 others like this.
  3. NoBody99

    NoBody99 Forum Resident

    Location:
    WV
    Both amps are grade A
    It's great to have choices

    USAM Pass XA25 $3600
    why did I look into this!?
    Nooooooo
    ;)
     
    timind and Tone? like this.
  4. timind

    timind phorum rezident

    This amp would work well with a passive preamp. As I'm down to only one source, Lumin D2 with SSD attached, I no longer use my preamp. I've been running the balanced output from the Lumin into the AHB2 using the the lowest gain setting for a couple months now without complaint.

    If the XA25 had balanced inputs, I would've tried one already. I also looked at the XA30.8/30.5, and would try one if they didn't weigh 88 lbs. Not lugging anything weighing more than 50 lbs down my basement stairs anymore.
     
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  5. avanti1960

    avanti1960 Forum Resident

    Location:
    Chicago metro, USA
    i use neutrik FE XLR to male RCA adaptors at the input of my amp. my preamp balanced out circuitry passes through an additional active tube stage and sounds much more spacious than the single ended outputs. the neutriks at the end of the XLR cables are all it takes.
    and yes, i am tired of lugging sub 100lb amps too, unless they stay for the durstion.
     
    timind likes this.
  6. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco

    Like I said.
    If your current pre is a total mismatch then that is weird.

    you should try out the LA4 to properly assess the AHB2’s.

    or whatever. Your call.
    Just seems silly to not try.

    pardon. I’m bored today. Lol
     
    timind and Zzz like this.
  7. Slippers-on

    Slippers-on Forum Resident

    Location:
    St.Louis Mo.
    Too bad lil bro. CODA would have loved to play over there.
     
    avanti1960 likes this.
  8. HIRES_FAN

    HIRES_FAN Forum Resident

    The comment where Nobody99 illustrates how he measured his 509x guarantees a 99.99% probability that "ingenieur" has indeed clawed back in. The dude even appears to scowl on different threads in a very similar fashion... :D

    Going once...Going twice...it is "Ingenieur"
     
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  9. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco
    Some more info


     
  10. RZangpo2

    RZangpo2 Forum Know-It-All

    Location:
    New York
    You seem to be good at these back-of-the-envelope calculations. Could you do me a favor and work out the average and peak W draws in my situation? Max 80 dB at listening position 2m from speakers, 84dB efficiency. Thanks!
     
    Tone? likes this.
  11. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco
    Interestingly enough from that video they mention that the AHB2 uses discrete parts.

    THX also doesn’t make anything they just do R&D. Pretty wild this day and age. Also two actual engineers on the panel and not snake oil salesmen.
    couple that with a team of engineers working on the project.

    impressive.

    too bad there isn’t more of that in audio.
     
    RZangpo2 and timind like this.
  12. NoBody99

    NoBody99 Forum Resident

    Location:
    WV
    I assume the 80 dB is A wtd average
    With peaks + 25 dBZ

    Average 0.4 W
    Peak 125 W at 105 dBZ

    80 dBA SPL is a pretty loud average level
    And 84 dB low efficiency
     
    Tone? likes this.
  13. RZangpo2

    RZangpo2 Forum Know-It-All

    Location:
    New York
    Thanks. Yeah, 80dB is really a maximum. I'm sure my average listening level is less.
     
  14. richsto

    richsto Forum Resident

    Location:
    USA
    Benchmark is smart to offer a 30-day trial. Me, not so much for taking them up on it. The HPA4 will not be removed from my system nor can I seem to remove my butt from the chair when listening to music through this thing. :laugh:
     
  15. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco


    that’s actually how I bought mine.

    i got the AHB2 to try
    I connected it to my then Rega Elex Rs preamp out.
    That blew away my rega of course.
    So I’m like “ hmmm maybe I should try the LA4 to pair with it since the AHB2 is so good . But what difference can a preamp make?”

    I got the LA4 with the 30 day return

    as soon as I hooked it up I was like “ uh oh”
    That’s another $2500
    There is NO WAY I’m giving this back.

    lol
     
  16. richsto

    richsto Forum Resident

    Location:
    USA
    Yep. Went into it expecting it would likely go back - “no way I’m going to spend $3,000 when my 20 year old Musical Fidelity Pre sounds so good.” Wrong.

    Helped that my wife encouraged me to keep it. She actually listened to music in the sweet spot for over two hours on Saturday and she thinks it’s “cute”. :love:
     
    Last edited: Nov 16, 2022
  17. Black Elk

    Black Elk Music Lover

    Location:
    Bay Area, U.S.A.
    Hogged the sweet spot for over two hours? You need to give her her marching orders!! :laugh:
     
    tIANcI, timind and Tone? like this.
  18. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco

    Lmao !

    totals man.
    I was like ok , how much of a difference can a preamp make?
    Whoooops!
    A huge diff.
    There goes $2500.( Well it was that much when I bought it. )

    it was so good that I just couldn’t return it.
     
    timind likes this.
  19. Jozzakezza77

    Jozzakezza77 Active Member

    Location:
    South Florida
    I read in the benchmark manual that the preamp/amp settings should be so that the preamp is at or close to max volume level at amp clipping...I'm using balanced connections and speakon connectors, my preamp is a denon pra 2000RG, speakers are dynaudio special 40's. LOVE my setup, but itching to try the Benchamark Pre and Dac.
     
    Last edited: Nov 20, 2022
    tIANcI likes this.
  20. ls35a

    ls35a Forum Resident

    Location:
    Eagle, Idaho
    I was talking to Noel of 'Skylan Stands' a few nights ago. He said he borrowed an AHB2 from a friend and he was absolutely raving about it, said he had to get one.

    I've had mine for six years. It's my last power amp. Ever.
     
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  21. Tone?

    Tone? Forum Resident Thread Starter

    Location:
    San Francisco

    You seriously need to try the pre with the AHB2
    I love my AHB2 LA4 combo . Insane resolution and natural timbre.

    i couldn’t believe how much of a diff it made.

    the DAC3 I didn’t like too much unfortunately.
     
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  22. ls35a

    ls35a Forum Resident

    Location:
    Eagle, Idaho
    Yes, the LA4 and AHB2 have amazing synergy.
     
    NoBody99, RZangpo2 and Tone? like this.

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