For anyone who might be interested: Nelson Pass-designed ACA amplifier kit "back in stock" :)

24

Comments

  • mhardy6647mhardy6647 Posts: 18,760
    They did a good job with 'em, too -- I really didn't do very much of the work. I did smoke test 'em, though. They were a little young to really be ready for working with lethal B+ voltages on the plates of the 2A3s!
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • verbverb Posts: 2,985
    mhardy6647 wrote: »
    no triodes in an Amp Camp Amp :)
    Three "elements" in a transistor, but it just ain't quite the same thing ;)

    If you want to dip your metaphorical toes into the SET water, here're a couple of nice options. L'il pricier, though.

    https://bottlehead.com/product/single-ended-experimenters-kit-3-for-headphones-sensitive-speakers/

    wawdp4tllo2k.png
    (Compactrons, baby!)

    https://bottlehead.com/product/stereomour-ii-stereo-single-ended-integrated-2a3-amp/

    1elbqyyufvl9.png

    What do you think of the Bottlehead SEX amp?
    Basement: Polk SDA 1C's, Micro Seiki MB14 TT, Rotel 1580 Pre, Marantz CD6006 CDP, Carver TX8 Tuner, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • mhardy6647mhardy6647 Posts: 18,760
    edited March 28
    verb wrote: »
    mhardy6647 wrote: »
    no triodes in an Amp Camp Amp :)
    Three "elements" in a transistor, but it just ain't quite the same thing ;)

    If you want to dip your metaphorical toes into the SET water, here're a couple of nice options. L'il pricier, though.

    https://bottlehead.com/product/single-ended-experimenters-kit-3-for-headphones-sensitive-speakers/

    wawdp4tllo2k.png
    (Compactrons, baby!)

    https://bottlehead.com/product/stereomour-ii-stereo-single-ended-integrated-2a3-amp/

    1elbqyyufvl9.png

    What do you think of the Bottlehead SEX amp?

    I haven't heard the current iteration -- I heard the original way, way back in the late 1990s. It was pretty respectable -- the 2A3 amplifiers outperformed the original, though, in every respect (as they should). They cost more, too, though.

    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • verbverb Posts: 2,985
    edited March 28
    @mhardy6647 I got an eye on a built one circa 2007.
    Basement: Polk SDA 1C's, Micro Seiki MB14 TT, Rotel 1580 Pre, Marantz CD6006 CDP, Carver TX8 Tuner, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • mhardy6647mhardy6647 Posts: 18,760
    edited March 29
    Got some 95+ dB sensitive loudspeakers with a benign impedance curve to match with it? If so -- go for it.

    or


    buy the amp and use it as an excuse to get some high-sensitivity loudspeakers.

    bwahahahahahahahahahahhhhaaaaaa!

    (or use it as a bitchen headphone amp)
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • verbverb Posts: 2,985
    What do you think of the Klipsch reference RB-61? 95db sensitivity.
    Basement: Polk SDA 1C's, Micro Seiki MB14 TT, Rotel 1580 Pre, Marantz CD6006 CDP, Carver TX8 Tuner, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • ClipdatClipdat Posts: 4,528
    I would go higher in the Klipsch food chain before going for those.
    verb wrote: »
    What do you think of the Klipsch reference RB-61? 95db sensitivity.

    Got Dayens?
  • verbverb Posts: 2,985
    Clipdat wrote: »
    I would go higher in the Klipsch food chain before going for those.
    verb wrote: »
    What do you think of the Klipsch reference RB-61? 95db sensitivity.

    Klipsch has got the RB-81's on sale right now for 279/each! 98db sensitivity.
    Basement: Polk SDA 1C's, Micro Seiki MB14 TT, Rotel 1580 Pre, Marantz CD6006 CDP, Carver TX8 Tuner, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • vcwatkinsvcwatkins Posts: 1,677
    My goal with the ACA buy is to try full range single drivers, but I wouldn't mind also trying efficient 2-ways. So, my questions are:

    Any recommendations on single drivers and corresponding plans or kits? If I build something, I would prefer narrow baffle width and smallish footprint generally. I don't mind going vertical 8' or less. Simple is better and basic plywood is cool. I do have a shop and tools but don't have a lot of floor space in the listening room. Maybe Frugel-horns? I don't want to spend untold hours on this - I just want to whip up something basic and see how I like the low power approach.

    Opinions on how Zu Omen's might match up? Other Zu's?

    Other systems - either single driver or 2-way - for <$800ish used? I don't have much floor space, so corner horns are not possible.

    I do have pairs of Hartley 220MSG 10" and 207MSG 7" FR (ferrite, not alnico), but they're packed up to sell and I sorta doubt they're efficient enough anyway. Here is an interesting system, but I think I would prefer something without a crossover. Looks like I'd need to add a phase plug somehow too. Any thoughts/experiences?

    Thanks for any help,
    Craig
    Den: Rega RP6 (mods) * AT33PTGII * Jolida jd9 (mods) * Roon (Sonic Transporter) * PS Audio DirectStream Jr. * Joule-Electra LA-100 iii * Sunfire Sig II * PSAudio p3 * MIT S3 * Polk SRS 1.2 (full mods)
    Office: Roon * Meridian Explorer2 * Pass Amp Camp Amp * PSA Dectet * MIT s3 * Hartley Reference Mini-Tower
    Beach: Music Hall MMF5.1se * Speed Box II * DL103r * Parks Budgie SUT * Belles Phono 20a * Sonos * Schiit Yggdrasil * Belles 20a * First Watt F5 Clone/Pass Aleph 30 * PSAudio Dectet * MIT s3 * Polk SRS 2.3tl (full mods)
  • verbverb Posts: 2,985
    mhardy6647 wrote: »
    Got some 95+ dB sensitive loudspeakers with a benign impedance curve to match with it? If so -- go for it.

    or


    buy the amp and use it as an excuse to get some high-sensitivity loudspeakers.

    bwahahahahahahahahahahhhhaaaaaa!

    (or use it as a bitchen headphone amp)

    Found this article interesting:
    https://www.dhtrob.com/overige/tubefriendly_lsp_en.php
    Basement: Polk SDA 1C's, Micro Seiki MB14 TT, Rotel 1580 Pre, Marantz CD6006 CDP, Carver TX8 Tuner, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • mhardy6647mhardy6647 Posts: 18,760
    vcwatkins wrote: »
    My goal with the ACA buy is to try full range single drivers, but I wouldn't mind also trying efficient 2-ways. So, my questions are:

    Any recommendations on single drivers and corresponding plans or kits? If I build something, I would prefer narrow baffle width and smallish footprint generally. I don't mind going vertical 8' or less. Simple is better and basic plywood is cool. I do have a shop and tools but don't have a lot of floor space in the listening room. Maybe Frugel-horns? I don't want to spend untold hours on this - I just want to whip up something basic and see how I like the low power approach.

    Opinions on how Zu Omen's might match up? Other Zu's?

    Other systems - either single driver or 2-way - for <$800ish used? I don't have much floor space, so corner horns are not possible.

    I do have pairs of Hartley 220MSG 10" and 207MSG 7" FR (ferrite, not alnico), but they're packed up to sell and I sorta doubt they're efficient enough anyway. Here is an interesting system, but I think I would prefer something without a crossover. Looks like I'd need to add a phase plug somehow too. Any thoughts/experiences?

    Thanks for any help,
    Craig

    How much of your money would you like us to spend? :)


    For all-in kits, Fostex has some cool ones; check www.madisound.com

    For cut-your-own... well... a folded, tapered TQWT (or a non-folded one, if you have the vertical clearance) is relatively straightforward to build (well, not for me -- nothing's pretty when I build it!) and is capable of good performance with myriad drivers.

    You've doubtless seen my Bob Brines designed folded, tapered mass-loaded TQWTs loaded with the venerable Radio Shack 40-1354 twincones, yes? If not, they look like this...

    9599007591_1f3e441faf_b.jpgDSC_6399 by Mark Hardy, on Flickr
    12289315386_cf252f4e11_b.jpgDSCN5289 by Mark Hardy, on Flickr

    I had these enclosures built for me from Baltic birch plywood, BTW.

    I would expect the Zus to be a reasonable match -- they do tend to (heh-heh) polarize people. Tekton, if memory serves, has some pretty sensitive and simple loudspeakers, too (as well as some non-simple ones).

    Also, you might want to think about a full-range driver (ahem - let's be honest: "extended range" driver) with a supertweeter. Get a nice, sensitive sweet sounding tweeter (there're quite a few options, new or vintage, at many price points) and cross it in very high first order with a good quality capacitor and an L-pad to adjust to taste.

    Does any of this help any?
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • mhardy6647mhardy6647 Posts: 18,760
    edited March 29
    verb wrote: »
    mhardy6647 wrote: »
    Got some 95+ dB sensitive loudspeakers with a benign impedance curve to match with it? If so -- go for it.

    or


    buy the amp and use it as an excuse to get some high-sensitivity loudspeakers.

    bwahahahahahahahahahahhhhaaaaaa!

    (or use it as a bitchen headphone amp)

    Found this article interesting:
    https://www.dhtrob.com/overige/tubefriendly_lsp_en.php

    TL;DR ;)

    In seriousness -- at a quick glance, it looks like it makes some of the points I like to reinforce about matching loudspeakers to amps with high output impedance (low damping factor). I didn't see anything clearly and blatantly wrong or stupid, so the prognosis is good. :)

    I'll peruse anon; thanks for providing the link.

    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • Jim ShearerJim Shearer Posts: 351
    I am a single driver fan myself, but they are not for everyone. Single driver speakers will not give you ear bleed SPLs, nor can they produce chest thumping bass. If you can accept their limitations, then you may find that the right single driver speaker can deliver a mid-range goodness that is only equaled by the finest multi-way speakers, but at a very modest cost.

    You mentioned Frugel Horns. That might be a nice build! I can recommend the Frugal Horn XL for the Alpair 10.3 driver as a good choice. And Madison has the A 10.3 on sale now:
    https://www.madisoundspeakerstore.com/approx-6-fullrange/markaudio-alpair-10-gold-6-full-range-gen-2/

    Or, if you want something smaller, the Frugel Horn mk3 with the Alpair 7 might do.

    If you chose either of these drivers, there are serious caveats about break-in and installation. Some users have complained about driver failure which IMO was entirely due to operator error. I can elaborate if you want to pursue these drivers.

    If you want to try a really cheap project, there is a project on DIYaudio.com using either dual Vifa TC9FD-8 or single Dayton PA-130-8 drivers in a Karlsonator style box built with foam core board!

    Keep us posted!

    Cheers, Jim
    A day without music is like a day without food.
  • vcwatkinsvcwatkins Posts: 1,677
    Wow, thanks @mhardy6647! Very helpful. Much reading to do.

    Single Full Range
    I picked up a pair of 40-1354a's for $32 and am thinking maybe a non-folded ML TQWT, although I prefer the proportions of your folded ones. I do have some birch plywood but it's 3/4 I think. Did your builder use 1" or double-up? They look very substantial.

    Tekton's
    I really would like to try the Double Impact, but paying $3k AND waiting months for delivery makes it much much less appealing.

    Zu's
    I think I'll monitor on-the-line for used Omens and buy if there's a very good value.

    Supertweeters
    I will read up and may try adding later.

    Thanks again for all the info.
    Den: Rega RP6 (mods) * AT33PTGII * Jolida jd9 (mods) * Roon (Sonic Transporter) * PS Audio DirectStream Jr. * Joule-Electra LA-100 iii * Sunfire Sig II * PSAudio p3 * MIT S3 * Polk SRS 1.2 (full mods)
    Office: Roon * Meridian Explorer2 * Pass Amp Camp Amp * PSA Dectet * MIT s3 * Hartley Reference Mini-Tower
    Beach: Music Hall MMF5.1se * Speed Box II * DL103r * Parks Budgie SUT * Belles Phono 20a * Sonos * Schiit Yggdrasil * Belles 20a * First Watt F5 Clone/Pass Aleph 30 * PSAudio Dectet * MIT s3 * Polk SRS 2.3tl (full mods)
  • mhardy6647mhardy6647 Posts: 18,760
    The cabinets are 3/4 inch on the folded TQWTs.
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • vcwatkinsvcwatkins Posts: 1,677
    mhardy6647 wrote: »
    The cabinets are 3/4 inch on the folded TQWTs.

    Gotcha, thanks.
    Den: Rega RP6 (mods) * AT33PTGII * Jolida jd9 (mods) * Roon (Sonic Transporter) * PS Audio DirectStream Jr. * Joule-Electra LA-100 iii * Sunfire Sig II * PSAudio p3 * MIT S3 * Polk SRS 1.2 (full mods)
    Office: Roon * Meridian Explorer2 * Pass Amp Camp Amp * PSA Dectet * MIT s3 * Hartley Reference Mini-Tower
    Beach: Music Hall MMF5.1se * Speed Box II * DL103r * Parks Budgie SUT * Belles Phono 20a * Sonos * Schiit Yggdrasil * Belles 20a * First Watt F5 Clone/Pass Aleph 30 * PSAudio Dectet * MIT s3 * Polk SRS 2.3tl (full mods)
  • mrbironmrbiron Posts: 4,812
    If Mr Hardy lets me borrow his ACA, i’ll tell you exactly how the Omens work with her ;)
    I keep making excuses why i CAN’T drive up to him.
    Zu Audio Omen MK-1B's, Peachtree Decco65, Bryston BDA-2, Cheap TT, PS Audio UPC200, PS Audio AC3's, Zu Mission SC's, HTPC, One, Bottlehead Reduction & Crack w/Speedball
  • mhardy6647mhardy6647 Posts: 18,760
    It is kind of our (the Forum's) ACA, not mine per se -- and it's warmed up and waitin' to go to your abode at our earliest mutual opportunity (or shipped in a box, if necessary)!
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • vcwatkinsvcwatkins Posts: 1,677
    I am a single driver fan myself, but they are not for everyone. Single driver speakers will not give you ear bleed SPLs, nor can they produce chest thumping bass. If you can accept their limitations, then you may find that the right single driver speaker can deliver a mid-range goodness that is only equaled by the finest multi-way speakers, but at a very modest cost.

    You mentioned Frugel Horns. That might be a nice build! I can recommend the Frugal Horn XL for the Alpair 10.3 driver as a good choice. And Madison has the A 10.3 on sale now:
    https://www.madisoundspeakerstore.com/approx-6-fullrange/markaudio-alpair-10-gold-6-full-range-gen-2/

    Or, if you want something smaller, the Frugel Horn mk3 with the Alpair 7 might do.

    If you chose either of these drivers, there are serious caveats about break-in and installation. Some users have complained about driver failure which IMO was entirely due to operator error. I can elaborate if you want to pursue these drivers.

    If you want to try a really cheap project, there is a project on DIYaudio.com using either dual Vifa TC9FD-8 or single Dayton PA-130-8 drivers in a Karlsonator style box built with foam core board!

    Keep us posted!

    Cheers, Jim

    Somehow missed this post. Many thanks for the great suggestions, Jim! I'll look into those.

    Den: Rega RP6 (mods) * AT33PTGII * Jolida jd9 (mods) * Roon (Sonic Transporter) * PS Audio DirectStream Jr. * Joule-Electra LA-100 iii * Sunfire Sig II * PSAudio p3 * MIT S3 * Polk SRS 1.2 (full mods)
    Office: Roon * Meridian Explorer2 * Pass Amp Camp Amp * PSA Dectet * MIT s3 * Hartley Reference Mini-Tower
    Beach: Music Hall MMF5.1se * Speed Box II * DL103r * Parks Budgie SUT * Belles Phono 20a * Sonos * Schiit Yggdrasil * Belles 20a * First Watt F5 Clone/Pass Aleph 30 * PSAudio Dectet * MIT s3 * Polk SRS 2.3tl (full mods)
  • mhardy6647mhardy6647 Posts: 18,760
    vcwatkins wrote: »
    I am a single driver fan myself, but they are not for everyone. Single driver speakers will not give you ear bleed SPLs, nor can they produce chest thumping bass. If you can accept their limitations, then you may find that the right single driver speaker can deliver a mid-range goodness that is only equaled by the finest multi-way speakers, but at a very modest cost.

    You mentioned Frugel Horns. That might be a nice build! I can recommend the Frugal Horn XL for the Alpair 10.3 driver as a good choice. And Madison has the A 10.3 on sale now:
    https://www.madisoundspeakerstore.com/approx-6-fullrange/markaudio-alpair-10-gold-6-full-range-gen-2/

    Or, if you want something smaller, the Frugel Horn mk3 with the Alpair 7 might do.

    If you chose either of these drivers, there are serious caveats about break-in and installation. Some users have complained about driver failure which IMO was entirely due to operator error. I can elaborate if you want to pursue these drivers.

    If you want to try a really cheap project, there is a project on DIYaudio.com using either dual Vifa TC9FD-8 or single Dayton PA-130-8 drivers in a Karlsonator style box built with foam core board!

    Keep us posted!

    Cheers, Jim

    Somehow missed this post. Many thanks for the great suggestions, Jim! I'll look into those.

    You got distracted by my drivel :|

    Yes, a bunch of good info in Mr. Shearer's posts!
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • maxwardmaxward Posts: 126
    This is exactly like I hoped that this thread would evolve. Lots of good information about appropriate speakers to mate with the ACA. Unfortunately, it appears that only a couple of us were able to snag one of the latest kits. Let us know how the builds go.
    Thorens TD-160C; Sumiko Talisman S; Jolida JD9; Marantz CD-53; Micromega Mydac
    Joule-Electra LA-100; Balanced Power Technology AC conditioner;
    Odyssey Khartago monos (with most factory upgrades); Magnepan MG 3.6R
  • mhardy6647mhardy6647 Posts: 18,760
    I am using these with the ACA, in case that wasn't obvious.

    24051079897_d03eddae1b_h.jpgDSC_9984 (3) by Mark Hardy, on Flickr
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • voltzvoltz Posts: 4,967
    edited March 30
    2 ch- Polk CRS+ * Vincent SA-31MK Preamp * Vincent Sp-331 Amp * Marantz SA8005 SACD * Project Xperience Classic TT * Sumiko Blue Point #2 MC cartridge

    HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD
  • verbverb Posts: 2,985
    @mhardy6647 newbie question. Other than sounding anemic, presumably, at low or moderate volume levels (avoid amp clipping), is there risk of running lower efficiency speakers on a low power SET amp?

    Just a placeholder until I get some higher efficiency ones of course! Please advise.
    Basement: Polk SDA 1C's, Micro Seiki MB14 TT, Rotel 1580 Pre, Marantz CD6006 CDP, Carver TX8 Tuner, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • ken brydsonken brydson Posts: 7,085
    mhardy6647 wrote: »
    I am using these with the ACA, in case that wasn't obvious.

    24051079897_d03eddae1b_h.jpgDSC_9984 (3) by Mark Hardy, on Flickr

    If I had a nickel for everytime I saw that pic I'd be a gazillionaire... B)
    HT/Main- Panny 50" G10 Plasma, Pioneer SC-1222k AVR, Panny DMP-BD60 BDP, Polk LS90 mains, CS350LS center, LS/fx side surrounds, LS50 surround backs, SVS 25-31PC+ sub, Harmony One

    Office Rig- Marantz 2252B, Denon 2910, Kenwood KD2070 TT, Polk RTA 12B's/ RTA8t
  • mhardy6647mhardy6647 Posts: 18,760
    verb wrote: »
    @mhardy6647 newbie question. Other than sounding anemic, presumably, at low or moderate volume levels (avoid amp clipping), is there risk of running lower efficiency speakers on a low power SET amp?

    Just a placeholder until I get some higher efficiency ones of course! Please advise.

    Not really. A SET will start to sound congested/strained as it slides into nonlinearity. It can be fairly unpleasant with the wrong recording :/
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • mhardy6647mhardy6647 Posts: 18,760
    mhardy6647 wrote: »
    I am using these with the ACA, in case that wasn't obvious.

    24051079897_d03eddae1b_h.jpgDSC_9984 (3) by Mark Hardy, on Flickr

    If I had a nickel for everytime I saw that pic I'd be a gazillionaire... B)

    If didn't have all that junk, maybe I would be too.
    "It's like watching a roomful of people who couldn't get through college algebra discussing the flaws of quantum physics theory. I guess it could be fun, but it's ultimately a waste of time." -- seen on audiokarma

    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

    "Writing about hifi is like dancing about architecture" -- paraphrasing some wag (possibly Frank Zappa)
  • george danielgeorge daniel Posts: 11,943
    edited March 30
    Is that a Sony Slant deck? 366?
    JC approves....he told me so. (F-1 nut)
  • BlueFoxBlueFox Posts: 10,088
    mhardy6647 wrote: »
    mhardy6647 wrote: »
    I am using these with the ACA, in case that wasn't obvious.

    24051079897_d03eddae1b_h.jpgDSC_9984 (3) by Mark Hardy, on Flickr

    If I had a nickel for everytime I saw that pic I'd be a gazillionaire... B)

    If didn't have all that junk, maybe I would be too.


    Are you calling my Bryston DAC junk? :)

    Did you ever use it?
    Bud - Silicon Valley

    Lumin S1
    Sony XA-5400ES SACD
    Pass XP-22 pre, X600.5 amps
    Magico S5 MKII Mcast Rose speakers, SPOD spikes

    Shunyata Triton v3/Typhon QR on source, Denali 2000 (2) on amps
    Shunyata Sigma XLR analog ICs, Sigma speaker cables
    Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables

    Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
    Three 20 amp circuits.
  • DSkipDSkip Posts: 14,768
    I run all my speakers on SET amps. They're all 20 watts or more so not flea power. One strange pairing is the Harbeth 30.2 with the Dueventi. At 85 db you would think the 30.2 would need more than 20 watts but they absolutely sing.

    As far as single driver, I like the Omega speakers I've heard. The Emerald Physics 2.8 that I'm getting in will be going on the block eventually but I'm not sure it will fall into an attractive price point for the ACA.
    audiothesis.com/

    Speakers: Harbeth: 30.2, SHL5+; Usher: Be-10, T-515; Rosso Fiorentino: Elba, Pienza, Certaldo, Fiesole, Volterra; Polk: T50, Signature S15, RTA 15tl, RTi12; Sonner Audio Allegro Unum, Legato Unum, Legato Semis, Legato Duo; Emerald Physics CS-2.8; Klipsch KLF-20
    Preamps: Shuguang S200MK, Dayens Ampino, Parasound P5
    Amps: Shuguang S845MK, Dayens Ampino Monoblocks, Parasound A23
    Integrateds: Triode Corporation TRV-88SER, MastersounD: BoX, Dueventi, Compact 845, Evolution 845; North Star Design Blue Diamond
    Sources: AURALiC Aries, Denon HEOS Link, North Star Design: Magnifico, Supremo, Incanto, Intenso, Venti
    Cabling: Wireworld
    TV: Sony XBR-75X940C
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