HPM100's - opinions?

Picked up a pair of ratty Pioneer HPM100's and made them pretty again. Cleaned the l-pads. Have not recapped, but they only have one electrolytic... Hooked them up to every amp I own. Really am not digging them. Why are they so desired? They are cool looking, is that the draw? Any input or experience? Thanks all!

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Current Collection:
Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)

Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...

Pairs that have passed through:
Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2

...and more to come, it’s a sickness.

Comments

  • mhardy6647mhardy6647 Posts: 23,658
    The HPM-100 has an interesting backstory -- but yeah they're... how to put this diplomatically?... not great.

  • verbverb Posts: 8,309
    My first set of real speakers were HPM40's, bought many years ago as a teenager. Loved em, but now I can say that I'm enlightened! :smile:
    Basement: Polk SDA SRS, Cary SLP-05 Pre, Enlightened Audio Designs CD Transport, Northstar Designs Excelsio DAC, Silnote Morpheus Ref2 Digital Cable, Marantz SA-14 SACD, McIntosh MC300 Amp, Furman 15PFi Power Conditioner, Pangea Power Cables, Wireworld Oasis 8 RCA IC's, MIT Shotgun S3 IC's, MIT Shotgun S1 Bi-Wire speaker cables
    Office: PC, EAR Acute CD Player, EAR 834L Pre, PASS ACA Monoblocks, Denon UDR-F10 Cassette, Acoustic Technologies Classic FR Speakers, SVS SB12 Plus sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable, Groneberg Quatro Reference IC's
    Spare Room: , Antique Sound Labs Wave AV-8 Monoblocks, Tisbury Mini Passive Pre, Tjoeb 99 tube CD player (modified Marantz CD-38), Analysis Plus Oval 9's, Zu Jumpers, AudioEngine B1 Streamer, Klipsch RB-61 v2, SVS PB1000 sub, Blue Jeans RCA IC's
    Living Room: Peachtree Nova Integrated, Cambridge CXN v2 Streamer, Furman 15PFi Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi sub
  • JayMXJayMX Posts: 248
    I picked up a little matching Pioneer set a bit ago that I’ve been playing with. Planning on pairing the HPM's with it and putting it up on the local classifieds or maybe eBay but I'm not excited to ship. Maybe some rich dude in Dubai needs the rig...
    57kfjv3q0jbt.jpeg
    577awwz46l0r.jpeg
    Current Collection:
    Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)

    Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...

    Pairs that have passed through:
    Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2

    ...and more to come, it’s a sickness.
  • mhardy6647mhardy6647 Posts: 23,658
    Too bad you didn't get it with one of these racks --

    g6y4e65u0nlk.png

    I am sure you know that all of those components are low to middlin' end of the Pioneer line of that era (ca. 1977, give or take) -- nothing terribly special there.

  • ClipdatClipdat Posts: 7,302
    You did a great job refurbishing those speakers! Wow!

    I'm sorry to hear that they don't sound as good as they look.
    "Electronic music is human sound adapting to indulge technology, and for some, it feels like the signature sound of energy. New and abstract sounds over hypnotic rhythms can conjure vast soundscapes for escape, pleasure, and transcendence."
  • pitdogg2pitdogg2 Posts: 14,987
    HPM
    High performance mylar. Loved the pair i used back in the day, now I know what I didn't know....
  • mhardy6647mhardy6647 Posts: 23,658
    FWIW, my recollection was that HPM stood for High Performance Molecular [Film]... but it was the Seventies... things were a tad hazy...
  • mhardy6647mhardy6647 Posts: 23,658
    edited May 2018
    Clipdat wrote: »
    You did a great job refurbishing those speakers! Wow!
    ...

    Yes, he did indeed; I forgot to mention that! :(
  • JayMXJayMX Posts: 248
    mhardy6647 wrote: »

    I am sure you know that all of those components are low to middlin' end of the Pioneer line of that era (ca. 1977, give or take) -- nothing terribly special there.

    Yeah not the good fancy stuff, but since it all matches I hope to turn some hipster vinyl lover on and make a little ca$h!!


    mhardy6647 wrote: »
    Clipdat wrote: »
    You did a great job refurbishing those speakers! Wow!
    ...

    Yes, he did indeed; I forgot to mention that! :(

    Thanks guys. I really enjoy the refurbishing process. Kinda become a hobby. Fun stuff!
    Current Collection:
    Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)

    Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...

    Pairs that have passed through:
    Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2

    ...and more to come, it’s a sickness.
  • Tony MTony M Posts: 8,386
    edited May 2018
    My HPM 100's , the 200 watt edition, sounded very good to me. VERY GOOD. I was very impressed! The guy who bought them was as happy to get them as I was to get the Tritons. Seriously. The guy got to hear them before buying them too. I also hated to see them go.

    Another one of those sets I regret......selling. :s

    There is a funny story about how I got mine at a church fund raiser. 40.00 for the pair. MINT too.
    I saw them in a lawn mower trailer behind an SUV. I asked if they were for sale still. Yes sir...40.00. I'll take them, great! Mam, can I leave them there while I go looking around since I just got here? SURE, I'll watch them, she said. Great, about an hour or less went buy and I drove my car to the front of their SUV since the other direction was 50 ft. deep of sellers.

    I go to the trailer and grab a HEAVY speaker and walk it to my car. My wife has the rear door open and I put it in the back seat. I turn around and there's this Lady staring like you wouldn't believe, at me! If eyes could kill, I would've been wounded pretty good. :#

    What in the world do you think you're doing?

    What?

    Your stealing my speakers!

    What?

    My wife speakes up: We paid for these speakers earlier.

    No you didn't!

    Yes I did, mam. At about 7:15.

    OK...who did you pay?

    A young woman.

    What did she look like?

    My wife has got a great people memory and described the young woman down to the color of clothes she was wearing.

    OOOOHHHHH, that's my daughter. She had to leave about 8:00 to go watch her son play soccer in the field behind the church.

    Well, would it be OK to load the other one then?

    Sure...I'm sorry. She said.

    No problem, I was ready to buy them again if I had too. ( I would have too! in a heart beat )

    Her daughter showed back up just as we were done loading. We told her the story with her mom there.

    We all got a big laugh out of the short stand-off we had over those speakers.
    Most people just listen to music and watch movies. I EXPERIENCE them.
  • rxonmymindrxonmymind Posts: 19
    Had a pair for a minute. I liked them when paired to my Marantz & Bob Carver gear. PLENTY of oomph and got decently low.
    Like you I went through a refurbish with them sanding, stripping, sanding, stripping and repeat. Took about two weeks but brought them to new condition. First project so I took my time allowing each stripper/sanding to dry 24 hours. Man, did I blow up the garage with the fumes! That's with the garage door open! One lesson I'll take from that. Wear goggles. Geeze that lacquer remover & stripper is serious stuff on the eyes.

    Hey, well done on refurbishing those & congrats.
  • CH46ECH46E Posts: 1,273
    Beryllium tweeters????
  • mhardy6647mhardy6647 Posts: 23,658
    edited May 2018
    CH46E wrote: »
    Beryllium tweeters????

    What, on the HPM-100?
    Heck no. All cone drivers except for the High Polymer Molecular Film (super) tweeter.
    Weird graphite/paper woofer, somewhat fragile.

    The next series of "HPM" loudspeakers had even more fragile (in some respects) graphite cones, at least on the woofers.

    Full disclosure: I do have a pair of HPM-1100s. Freebies. They're actually not bad driven by, e.g., a push-pull EL84 amplifier (e.g., Dynaco SCA-35).

    10541818085_d115e2e01d_b.jpgHPM1100 by Mark Hardy, on Flickr

    There were certainly some TAD drivers with beryllium diaphragms, and maybe some post- HPM era Pioneer branded loudspeakers' drivers as well.

    EDIT: Here's one: https://www.stereophile.com/floorloudspeakers/307piosex/index.html

    oh, and another:

    vmf2zswr3s9l.png
  • Reyes214Reyes214 Posts: 1
    The HPM100 was "inspired" by the L100 (Century) in that they were both a 3 way speaker with a white woofer cone. The similarity pretty much ended there. The HPM100 had the polymer tweeter that mimiced an electrostatic design without being one upsers portal
  • mhardy6647mhardy6647 Posts: 23,658
    edited October 18
    . . . . . .

    oops :#


  • skrolskrol Posts: 2,831
    I just walked away from a seemingly good condition HPM-60 today for $150.
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW10 (DXi104 upgrade), Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7; Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
  • txcoastal1txcoastal1 Posts: 10,665
    Bloated bass
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC
  • msgmsg Posts: 5,068
    Plop plop fizz fizz, Ron.

    That refurb was great. Love the process and photos.
    I disabled signatures.
  • indyhawgindyhawg Posts: 1,350
    skrol wrote: »
    I just walked away from a seemingly good condition HPM-60 today for $150.

    I have a friend who has both the HPM 100's and 60's. I had the chance to hear them both head to head last weekend. I preferred the HPM 60's to the HPM 100's. If I had to make a choice between the 2, I would take the 60's. The 60's did not seem as bloated or bright to my ears.

  • mhardy6647mhardy6647 Posts: 23,658
    Didja'll notice that the post that reanimated this thread was spam?

    I mean, even I did... although it took me three edits to get there on Friday :p


    I will note -- since this thread's chugging along again -- that 1) the HPM100 never, ever had white woofer cones (they had delicate carbon-fiber cones) and 2) they were a little more than just an homage to/copy/ripoff of the JBL L100* -- Bart Locanthi of JBL jumped ship to Pioneer and bore substantial responsibility for both of those 'century' loudspeakers. :|

    ___________________
    *The L100 itself being an homage to/copy/ripoff of the venerable Altec Duplex -- meant to be a drop in, albeit higher-sensitivity replacement for the Duplex. The L100 was the tip of the JBL iceberg that ultimately helped put the 'real' Altec out of business :( Altec's own bevy of missteps did the rest of the damage. :/

    http://www.audioheritage.org/html/history/jbl-pro/1960s.htm
    http://www.audioheritage.org/html/profiles/jbl/l100.htm

    25446819716_8eb219ca35_b.jpg604E by Mark Hardy, on Flickr
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