IRS Beta bass amp/system ideas thoughts etc

Discussion in 'Infinity Loudspeakers' started by funhungryman, Feb 14, 2018.

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  1. funhungryman

    funhungryman New Member

    Messages:
    10
    Location:
    Arcata, Ca
    Recent acquisition of very very nice IRS Betas. Like, last night....I made the decision to build a front end from scratch...
    I am going with a Sonic Frontiers Power 2 (sovtek KT88s) Possibly Transparent Audio Reference cables to the mid/highs.

    Recommendations on bass amplification?
    I currently run vintage Mac tubes on several systems, but I want something that will be strong and effortless without spending more than say $2k.

    I am also considering class d, I have had extensive maintenance on my macs due to
    age (worth it!!) but would prefer to avoid that. I have several Mc2100s but I strongly believe I can do better.......so new stuff? Old stuff?

    TT/DAC/Pre amp suggestions. I am an open book...prefer warm, natural tones (ie early mac tubes) Listen to blues, folks, rock, some modern and jazz primarily....but I will put on anything interesting!

    Also, I live in a rural area, there is some local availability but, I have a 5 hour drive to SF. But I have family there so I am down that way ~5x a year

    Respectfully,
    Walt
     

     

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  2. swechsler

    swechsler Frog Whisperer

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    :needpics:



    Did you get the servo controller with it?
     
  3. funhungryman

    funhungryman New Member

    Messages:
    10
    Location:
    Arcata, Ca
    Yes....original owner...w/ boxes, manual, servo....woofers were all refoamed, refinished, cabinets rebraced....and an extra helping of camaraderie and well wishes, the seller even offered to help with acoustic recommendations and positioning them....on top of a very very fair price!
     
  4. funhungryman

    funhungryman New Member

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    Location:
    Arcata, Ca
  5. uvafan420

    uvafan420 LiKe It LoUd

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    That was a good deal. About what they should go for (or a little more, depending on originality and condition of course). Some must be smoking heavy on something really strong due to the prices they are asking.
     
  6. swechsler

    swechsler Frog Whisperer

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    Location:
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    These can be very finicky, positioning-wise, but they're said by some to be the best Infinities ever (even better than the IRS V). It might very well be worth taking advantage of the seller's offer to help position them.

    I had a chance to get a set at an excellent price but even then couldn't justify it (plus my wife would probably have had divorce papers in hand the next day).

    Have you read the Stereophile review? See links here.
     
    Bodhisattva and Bahamayellow like this.

     

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  7. funhungryman

    funhungryman New Member

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    Location:
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    Best part is they are very late production so some of the early bugs are worked out....they sounded amazing in his house
     
  8. funhungryman

    funhungryman New Member

    Messages:
    10
    Location:
    Arcata, Ca
    I read everything I could find! Yes, my only reservation (aside from the totality of the investment) was complexity....I plan to leave my mac tube/JBL apollo C51s in place while I sort these out
     
  9. 7.62

    7.62 Gearhead Subscriber

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    OK.....were all grown ups right, UN FUCKING BELIEVABLE :bowdown:.

    IT sure warms my heart that these kinda deals can be found........just damn.
     
  10. StimpyWan

    StimpyWan AK Subscriber Subscriber

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    To the OP, Congratulations! Awesome. And I wonder how long the ceramic vase stayed on top of the left bass tower? It would have rocked off in no time for me! :rockon:

    Oh yea, did anyone see these hybrid IRS-Beta's on eBay (not mine)? Very interesting, in that the cabinets looked very decent. Like a manufactured design. I'm not sure if they sold or not? They may still be there?

    INFINITY MINI IRS 1 2 s-l1600.jpg
     
  11. Tedrick

    Tedrick Infinity-phile Subscriber

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    That's the work of Magicmarksy. He was a member here a number of years ago. A very enthusiastic Infinity fan, he could be a bit forward; he got into it a few times with some other members and eventually left. I've spoken to him on the phone a time or two, and he seemed approachable and knowledgeable.
     

     

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  12. StimpyWan

    StimpyWan AK Subscriber Subscriber

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    Blue Ridge Mountains!
    Dr Marks is quite the character. He lives in the same town as my brother. I've always thought about visiting him, but my brother is my priority, when I visit. :)
     
  13. swechsler

    swechsler Frog Whisperer

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    That's a polite way of putting it. On the Infinity Yahoo group he actually "got into it" with Bill Watkins...
     
  14. funhungryman

    funhungryman New Member

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    Location:
    Arcata, Ca
    Swechsler....THANK YOU! I had read the stereophile review(s), though admittedly NOT in German. The Hi Fi News and Record Review; however, was not only a pleasure to read but reaffirmed my dodgy judgement when it comes to spending absurd money on the esoteric, just because.....I hope you are not a shrink, because you would spawn an entire generation of the self indulgent....oh wait...millenials ;)
     
  15. funhungryman

    funhungryman New Member

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    Location:
    Arcata, Ca
    But....and it’s a big ole BUTT....What about modern amplifier reccomendations for the “bottom” end....

    I kill me, really I do....next show at 11, please tip your waitress....‍
     
  16. damacman

    damacman Blown and Injected Subscriber

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    Spectacular! What a find.

    Currently, there is some BIG Mc iron in BT that would drive those woofer columns effortlessly.
     

     

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  17. jtucker

    jtucker Member

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    Several years ago I had the IRS Gammas. I used Adcom GFA-5802 to power the servo controlled woofers. Worked well for me. Not sure what your taste in amplification is other than Mac tubes, but I would not think tube amplification would be suitable for the woofers. I might be inclined to look at a hybrid such as the PS Audio BHK amplifiers.
     
  18. wlhd1610

    wlhd1610 Penny and her new friend Sponsor Subscriber

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    Location:
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    Just now saw this !
    I have a Mac 2500 driving the woofer towers and let's just say it's breathtaking!

    Bob
     
  19. funhungryman

    funhungryman New Member

    Messages:
    10
    Location:
    Arcata, Ca
    One of my key concerns is the Damping Factor on older Amps, I know that speaker cables can be a huge factor here. What type of cables are you running and have you tried different configurations?
     
  20. wlhd1610

    wlhd1610 Penny and her new friend Sponsor Subscriber

    Messages:
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    Location:
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    I was told the Beta towers would "eat " most mortal amps because they routinely dipped below 2 ohms.
    I was using a Adcom GFA 555 that the original owner of the betas was driving t be woofers with but I wanted something that was more suited to 2 ohm loads plus had output protection in case of failure.
    The 2500 with autoformers came highly recommended.
    Been very happy with it.

    I run 12 gauge SJ about 15' long runs.

    Bob
     

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