Princeton Reverb 2x10?

Discussion in 'Amp Central Station' started by Mark the Moose, Apr 24, 2019.

  1. Mark the Moose

    Mark the Moose Tele-Meister

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    Planning a build for this summer! Thinking Princeton Reverb with upgraded Allen transformers and a 2x10 cab. Now I know many purists will say that underpowered trannies and a 1x10 are what give a PR its charm, but I'm wondering if any of you have built or upgraded your PR to something along these lines and what the outcome was like.
     
  2. thunderbyrd

    thunderbyrd Poster Extraordinaire Silver Supporter

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    I have a prri that was put into a head then runs through a 2x12 cab. I am not as knowledgeable and experienced with amps as most are here, so all I can tell you is I think it sounds great.it loves any guitar. certainly not "boxy" sounding at all. a 2x10 would surely sound very fine.
     
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  3. nojazzhere

    nojazzhere Poster Extraordinaire

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    Not what you're asking, I know, but I had a 1964 Princeton (non reverb) that I put a 12" Jensen in.....and it sounded wonderful.
     
  4. Snfoilhat

    Snfoilhat Tele-Holic

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    Last year I built a 2 10" open back combo cab to fit a Princeton reverb chassis (18.375" wide cutout). Eminence 1058-alike speakers. Surprisingly light weight and sounds good.

    I haven't listened to it with any 15ish watt amp yet, only a 5ish W and a 2ish W (both built in PR chassis).

    Go for it. If you like the sound of a PR you likely can't lose, unless the combo's weight or dimensions pass your personal threshold for too much. I haven't developed an opinion on OT contributions to sound. I fully support PTs that can actually handle the circuit. Good luck
     
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  5. Mark the Moose

    Mark the Moose Tele-Meister

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    I suppose my gleeful hope is that it will put me in the neighborhood of a lower wattage vibroverb/vibrolux reverb.
     
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  6. archetype

    archetype Fiend of Leo's Silver Supporter

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    I use my SCX2 combo as a head, sometimes, and aside from the SS preamp it's 99% Princeton. Run through my Tremolux 2 x 10" cab with the back removed, it's got a surprisingly large, open, room-filling tone.

    I'd say that you can't go rong with your idea, but... yes you can go rong.

    If I were me, I'd use the stock transformers to start with, just as a baseline to see how it sounded. If you go with Allen transformers, choose wisely from the different models. You can 'improve' a Princeton too much and end up losing some of the characteristics you want to retain.
     
  7. Snfoilhat

    Snfoilhat Tele-Holic

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    IMG_2777.JPG
    edit: new photo because distortion in the previous one made the grill cloth look more crooked than it is. TDPRI Shock Brothers is a proud institution:p
    IMG_2768.JPG
    Recycled pine, plywood, back doors, and grill cloth. So you could make something considerably better looking, but here's the basic shape.
     
    Last edited: Apr 26, 2019
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  8. aerhed

    aerhed Friend of Leo's

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    The phase inverter is a big part of the Princeton sound. Bigger transformers usually mostly sound like a bigger Princeton. Like using two of them.
     
  9. caspersvapors

    caspersvapors Tele-Meister

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    Id probably just go for a head + cab configuration in the event you ever want to sell that amp down the road.

    Selling a 2x10 combo that only fits a Princeton chassis is a pretty esoteric thing. Selling a 2x10 cabinet isnt too tough.

    And I think you get a bit more utility/ease of use out of the amp going with a head.
     
  10. Mark the Moose

    Mark the Moose Tele-Meister

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    Probably wise.
     
  11. charlie chitlin

    charlie chitlin Doctor of Teleocity Silver Supporter

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    DO IT!!
    I'm gonna put mine in a 4x10 one day.
    Really.
     
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  12. Ess Eff

    Ess Eff Tele-Meister

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    Well, just talkin Princeton mods... I did the 12" thing with a C12N. Nice!
    .
    IMG_20190401_153806.jpg

    Got a 5F1 coming so might do a Champ 10" next.
    .
     
  13. Bob Arbogast

    Bob Arbogast Tele-Afflicted

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    I tried several times to get a smaller version of a Vibrolux Reverb using a Princeton Reverb chassis and circuit as a starting point. It never worked. What did work is a 2x10 Deluxe Reverb using the lower voltage winding of an Allen TP25. Yep, the result sounds like a lower wattage Vibrolux Reverb!


    [​IMG]


    [​IMG]
     
  14. Mark the Moose

    Mark the Moose Tele-Meister

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    That's a sweet amp. How do you like the trem?
     
  15. jsnwhite619

    jsnwhite619 Friend of Leo's

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    I just finished a PR build with Hammond transformers. 100mA PT 290AX, 15 OT 1750E, and 5u4 rectifier. All new JJ's and 12" Cannabis Rex. Best sounding amp I've built or played I think. It didn't break up with single coils until 8 on the dial. Added a NFB switch that ended up kinda like a bright switch. Added a lot of top end, but worked great with the CRex. Headroom didn't change much til after 6 or so, just brighter and louder. That transformer set kept it as clean as I could ask for at vintage levels. Turned out great! Legend 1258 sounded amazing, but too bright with treble past 5 or so


    Sent from my XT1585 using Tapatalk
     
  16. horseman308

    horseman308 Tele-Holic

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    Ok, that is f'ing rad. Would love to hear more. Like, what's the head room compared to a stock DRRI?

    Sent from my SM-G930P using Tapatalk
     
  17. Bob Arbogast

    Bob Arbogast Tele-Afflicted

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    I like the trem a lot, though in this case it's a bias-vary trem, same as on a Princeton Reverb.
     
  18. Bob Arbogast

    Bob Arbogast Tele-Afflicted

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    I've never played a DRRI (or a Deluxe Reverb of any kind, for that matter!), so I can't compare. To my ear this amp has about the same headroom as a Princeton Reverb, maybe a bit more. But the voice is closer to a Vibrolux.

    For the techie types: with the TP25 lower voltage winding and a solid state rectifier, I have a B+ of 375V (with 122Vac on the line). I'm guessing that set up like this it's maybe a 15W amp.

    I've thought about trying the higher voltage winding for standard DR voltages, but for the paces I tend to play I don't need the extra volume/headroom.
     
  19. horseman308

    horseman308 Tele-Holic

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    Thanks. Did you find it for sale somewhere or do it/have it done yourself?

    Anything different (that you know of from a stock DRRI)? I'm assuming there would have to have been some other components swapped out, but I don't quite have the tech knowledge to hazard a guess as to what.

    Sent from my SM-G930P using Tapatalk
     
  20. Mark the Moose

    Mark the Moose Tele-Meister

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    Now you're talkin'! If I could figure out a DR with a bias vary and 2x10's that would be a perfect amp.
     
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