Pioneer HPM-150 Restoration - Cabinet restoration & Final assembly

Part 3 of restoration:
Cabinet restoration
Part 4 of restoration:
Final assembly
Restoration bucket list:
- refoamed woofers
- super tweeters taken apart and cleaned
- new silver plated copper internal wiring
- new high end banana posts
- new crossovers with Jantzen Cross Coil Inductor and Clarity cap capacitors all with 2% tolerance, Resistor - MOX 1% tolerance
- deox potentiometers
- added internal sound dampening
- cabinets sanded,
- front and top sprayed with matt black
- high gloss finish of walnut veneer: 3 layers of high gloss acrylic with 2 more layers of high gloss yacht varnish on top of it.
- back side of speaker re-sprayed brown high gloss
- set of extra castor wheels
Pioneer HPM-150 Restoration - Part 1: Disassembly - audiotweak.net/2015/03/07/pion...
Pioneer HPM-150 Restoration - Part 2: Crossover - audiotweak.net/2015/08/08/pion...
Pioneer HPM-150 after full restoration and upgrade - audiotweak.net/2015/04/20/pion...
Background music:
Chris Zabriskie
Demo music:
Stormchaser by Sean de Burca
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Welcome to the Marten Electric (c) Martin Niec
Vintage audio gear connoisseur, computer enthusiast, time-nut, music lover, vintage games gamer, nerd, tinkerer and shady electronic projects maker
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Out of respect to wide variety of people who watch my videos, I will remove comments that do not follow common standards of politeness and decency.
Thanks for watching!

[@rockerforlife194]

My all time favorite speakers. Ever! Amazing job. 👍👍

[@gspot65hotmaildotcom]

I can only cry when I see those. I used to own a pair (new ones) for about 20 years. The foam was rotten of course. And moving out of my house I couldn't take them with me. They ended up ... (you don't want to know). Best pair of speakers I ever had. Great work!

[@playbackvintagehifihunter9669]

Gee s I do want to know..

[@davidcarrington9458]

Just like to say because of your videos I've fixed my pioneer stereo and my old jamo speakers .thanks.

[@frankmarlin2385]

I have the exact same pair I bought in Okinawa in 1976. They are HPM 1500's. Great speaker's. great job on the restoration.

[@josephlalock8378]

hpm 1500's have a different grille arrangement. these are 150's

[@RUfromthe40s]

those were the ones i had, i had to sell everything ,only the turntable stayed till today but at the time i used to listen to radio and only had records,only later i bought a reel deck and even later a cassette deck, this because i install in my car a great power system all from pioneer with cassette player ,i used to go for a drive after dinner, regards

[@looqischmidt536]

Very nice job! Congrats, and I always love the '80 design.

[@HeavenReservation]

Fantastic job, for those who don't know, the HPM series is one of the best sounding speaker ever!

[@firstlast-dd3ps]

Owned the HPM 100's and 60's, new back in the day... big, powerful and oh so sweet!

[@eksine]

Not true, they sound mediocre

[@Jimmy-yu8fe]

Beautiful work! Congratulations.

[@Mattyboy88979]

One word stunning, i enjoyed this so so much thankyou for sharing with us.

[@pinarellospeedracer]

Fantastic job never get rid of these great speakers

[@beflabbergasted325]

Those were made here in Portugal. I worked in the factory. The factory has closed now. But there were several brands of speakers made here. Mission, Acoustic Research, Mordaunt-Short and, of course, Pioneer, just to name a few.

[@unni7301]

Really great.you give life to speakers

[@ProjectOverseer]

That was an excellent restoration 👍

[@azmike1956]

Very nice partner, love the finished product!!

[@LifeGQ]

Amazing job!

[@fredfungalspore]

well done great to see young people taking a fine hobby ...A Credit To You...:)

[@erikmaki8642]

Very stylish. Good job, well done. Great.

[@kevinquevem]

Enjoyed your work.

[@MrClassicalMusic1]

Great looking speakers!

[@bnlinds]

Luv the Varnish!!!!

[@hdgboy]

A lot of patience and hard work. Much to the dismay of some commentators. Great job. Looks nice.

[@dnate697]

One of my favorite speaker sets! I had to settle for CSA-922's LOL!

[@thedr.feelgood]

Great job..... Very cool indeed ! We had the same sideboard as that , when I was a kid at home.....

[@donotwait]

Great Job! HPM's are very interesting. On a quality tube rig they are mind blowing. I thought that solid state would have been the preferred power but on a good tube set up I couldn't believe my ears. We were comparing them to a much higher end speakers that completely out classed them (and should have for the price), yet when we switched amps to tubes these speakers destroyed speakers many times their price point. Synergy is a big deal. Great video, thanks for sharing

[@MartenElectric]

Thank you for your comments, that's really interesting observation, I have never tried them with tube gear although I have more than dozen Pioneer tube machines. I've played them with SX1250, SPEC1&4 and SA-8800, they sound best with SPEC. Definitely have to try!

[@piglet1ification]

Well done Mate!

[@decorservis2836]

very good work! uniquely like. Greetings from Latvia

[@musicman257]

beautiful work!!!!

[@armandodelgado1855]

Brenda la lora quehabla

[@gabrielromero5763]

Looking great 😎👍🔊🔊

[@kennethburchett6393]

They turned out well… ✌🏻

[@lloydparks4974]

awesome job !

[@loadi2865]

congrats sir looking good .....sounds great...nice work.

[@alibramcmv]

Excellent job:)super speakers:) Am still search them to buy for use my PIONEER SX-1080,now am use DALI and MAGNAT team but i want to be own HPM-150:) Listening sound with them really will be so amazing and deeply and different:)

[@MartenElectric]

Surprisingly HPM150 don't sound bad even in hifi therms. My favourite pioneer speakers would be HPM-100 however as they are also happy to provide casual listening and are more compact.

[@baldbearded349]

Good job dude!!

[@RM-eq7et]

Perfect!!!

[@benwelsh16]

exquisite finish.

[@MickeyMishra]

I'm really digging how you install the casters on the bottom of speakers why haven't I not thought of that before? Looks like you need to do this ASAP!

[@hi-fidude6670]

Dream speakers. I have the HPM 70, they are the later version 60s just in black. Recapped them too, sounds great

[@jimmcdowell8504]

Excellent job!

[@robertomoreno5526]

Beautiful speakers

[@Badassvidsz]

Nice job guys

[@jonathanwong880]

Superb good work. Thanks for sharing as I am restoring some old JBL speakers. Cheers!

[@MartenElectric]

Cool, thanks!

[@alexander_mmm]

Nice job!

[@FareedRJam]

Great job!

[@MartenElectric]

Thank you for your kind words

[@stephanemorel8904]

magnifique ensemble quel beau matériel je connais tous cela j'ai la même chose !!!!

[@MrMichaelpaul45]

I believe you should always rub down following the grain of the wood,if you do not you will see the scraches where you rub againest the grain of the wood.its up to you of cause but just felt i wanted to say this to you.you did do a great job buy the way they look very nice .your restoration looks to have gone very well nice job.

[@teashea1]

nice work -----

[@rorymoore3879]

Good job enjoy them

[@djshumon]

I have pair of pioneer cs and the black vinyl was peeling so I just re done the vinyl in gloss white.the speakers now look very modern with big black drivers that adds to the contrast.

[@jonnygould4549]

same as, vinyl all come off mine .might just pinch your idea on finish..poor things look a right state...great idea thanks

[@djshumon]

@@jonnygould4549 best way to go.my speakers are pioneer cs 997.they look soo much better.its not expsensive either.

[@paulevans4334]

I've got a pair of them just sitting around. Bought them at a car boot sale some years back

[@AquaFreak]

Always a good idea to spray paint in house

[@nsizwashongwe8700]

excellent

[@Michal1302]

Excelent...job

[@theejoeylee]

I have one of these!

[@wise003090]

Excellent

[@borysandreyev9717]

Super!

[@timschutte6924]

I have a pair of vintage Sansi 12 inch speakers from the 1970s. Same era of these. They have the 3X7 inch horn loaded compression tweeter with L-Pads on the front. Normal and high settings. The cabinets are a little banged up and the sharp corners are dinged from years of moving. The casters are a good idea. Keeps them isolated from the floor and are much easier to move around. I'm gonna get the trapizoid cabinets from parts Express and rebuild them into those new cabinets. I'm gonna use the old ports and cross overs. I have to replace the 5 inch mid range drivers cause they were poked by my son's finger when he was a baby. But they are still the best sounding and highest output of sound and bass I've ever heard. Very high sensitivity. But they can still take a couple hundred watts of power. I'm gonna install real wood veneer on the cabnets. They remind me of the JBL L-100s.

[@fotoboxBK]

BIG LIKE!

[@hernandezariel8622]

Buenísimo!!! Pero que le pusiste arriba? Gracias!!! Desde Argentina!

[@mrboat580]

Nice.

[@socksumi]

I have HPM 100s and I can't believe how cheaply they are made. Absolute minimal crossover... just single caps on the tweeter and mid and the tiniest coil on the woofer. No internal bracing and magnets are the size of checkers. The mid driver actually behaves like a tweeter because it crosses over at 3khz. It's essentially a two way system with three tweeters.

[@albertalbertov5835]

why are you still fucking shit when they are so bad and cheap

[@paolpricci6892]

Good Job

[@sidbarret123]

Nice

[@Westcoastpedalboard]

Nicely done! I’m getting a set of these tomorrow and I’m gonna use this DIY process. Question: if Inwanted to make a solid walnut cabinet using half blind dovetail joinery, would there be any drawbacks? I know in the guitar/bass speaker cab world, there are some things to watch out for. My entire system is being re-housed in solid walnut enclosures/racks etc. Thanks for your time and a great video series!

[@MartenElectric]

Hi mate, thanks for a question. I would definitely avoid making a new cabinets for these as they will lose it's value. You might appreciate it, they will be very hard to sell.

[@MrDannydjmix2]

how big is the difference in the crossover upgrade u made? i might do on my monitors, very nice setup u have!

[@bentleygt3716]

WELL DONE JOB. great restoration.

[@EUROPADOS]

BENTLEY GT@

[@1515radar]

Зачёт)

[@izziOnBass]

I cried at the end! with happiness of course!

[@DoNaSbaR]

Well done! BUT... Those speaker deserves NOT to have castors! They look gorgeous and sound great! I like them. Good work.

[@Vortexetrov]

Although I'm building my own 3-way stereo setup now, I just accidentally came to your video here and I decided to watch it 'til the end. Big-big respect, very nice precise work, omg I love this new-vintage look of these Pios :) Very nice job, I hope you enjoy the sound. Are they woman-compatible? ;)

[@RUfromthe40s]

i think they are the problem, one used to scream at me and i only turn up the volume till i only watched her mouth moves without any sound coming of, the second loved the loud sound then when inside after 4 monthes she used to tell me "use the phones my head is hurting" but with a smooth voice ,a year after again ,turning up the volume till only saw her mouth moves so no woman compatible, i know some but they are crazy mad so doesn´t count, i sold everything and bought what they call now bookshelf speakers ,regards

[@jeremylord5050]

Hey that woodgrain spray? ? what is it? I have speakers similar to this with sticky laminate and it could peel!!

[@laurentiupascariu5743]

Bravooooooooooooooooo

[@timschutte6924]

Very nice job. I would have done the back in flat black but that's just me.

[@peterderidder2655]

Nice restoration but didnt find what I needed to know ; I wanated to know wich color of wires goos to + and wich color goos to - on youre woofer , so can you tell me please

[@roguesquatch1]

Amazing job! Would love to see a final shot with the grills on too.

[@MsCorbacho]

where those clarity caps not to much ,..?.I have used them already ,and in some speakers , especially the ones with old tweeter technology they tend to sound a bit to sharp, paper in oil capacitors tend to work better , and they don't need to be expensive ones. (no critic just my experience), Nice job.

[@user-ph1br3eo3e]

...НА КОЛЕСИКАХ=БУДЕТ БРЯКАТЬ,ДА ОТЪЕЗЖАТЬ В ПРОЦЕССЕ СУПЕР-БАССА...

[@kennyw2474]

What did you use on the cabinet after sanding? Just clear lacquer? No walnut stain?

[@rodneycollaco6645]

which black spray paint did you use ???

[@jamelbautistatellez7796]

Saludos cordiales desde Reynosa Tamaulipas México yo tengo un par de bocinas de esas q aparecen atrás iguales 12"

[@richardroundtree2022]

I have a pair of HPM-150's and would like to know where you got the stands from for them. I need a pair.

[@templar084]

This black paint it black mat?

[@crash7098]

Probably a dumb question, but are those vents under the main woofers?

[@vitalpellet]

what is the thing aiming on the box on

[@danielecamboni4405]

hello do you know the pioneer s-1010? what do you think about it ?

[@a.johnwillnut5977]

Sx 1010, sounds boomy and too warm . Go with a SX-1080 . Great receiver. Or SX-1050 , a little more noisy but great.

[@atyourserviceable]

Always sand with the grain

[@DogDaze66]

Is the insulation replaced , you left that out of the video.

[@tarektarek2594]

japan

[@marvinmurakami8828]

I wonder why pioneer didn't use hpm (high polymer molecular) film tweeters on these.

[@mohammadhoseensalehisolout5721]

No:1

[@QAudio]

Can you tell me what spray paint brown you used to paint in the back?

[@MartenElectric]

Sorry for late reply, any brown Matt spray paint will do.

[@QAudio]

@@MartenElectric can I have your code # if you don't mind

[@MartenElectric]

@@QAudio I wish I knew, it was just generic brown matt spray paint #C85 Walnut, do not think it’s too much of a big deal.

[@macadoo2530]

2:10-Is that a turtle holding the door open?

[@MartenElectric]

ha ha it's a big fat cat!

[@rodneycollaco6645]

sir, which is the black paint ,you've sprayed on the front face of the speaker ?

[@MartenElectric]

hi there it's a good quality Matt black spray paint. buy some good brand and you'll have a good results

[@rodneycollaco6645]

which one r u using

[@MartenElectric]

I honestly don't remember. I've bought it at BnQ in the UK. just buy a good brand, that will do. it even better, have it sprayed in some car paint shop!

[@rodneycollaco6645]

thanks for the advice

[@roelcahinde5619]

Sir what is the size of the cabinet

[@user-wc6qy3rc2e]

мало того, что из баллона красил, так еще и перед лаком. лак наносится одном направлении по волокон древесины. шлифуется либо машинкой круговыми движениями, либо в ручную по направлению волокон вверх-вниз. не надо хаотично возить наждак по детали.

[@MauricioRodriguez-xf8hs]

👏🏻👏🏻👏🏻👏🏻👏🏻👍🏻👍🏻👍🏻❤️😎

[@delreynodiaz2004]

I want to restauring the cabinets of my pioneer cs-99A to I copyng you

[@mikeshobbiesandrandomstuff]

Is that an sx-1980?

[@MartenElectric]

It's sx-1250, 1980 is in storage at the moment mate.

[@efebel2011]

los medios son muy chicos

[@julioconceicao4489]

Júlio santos

[@TheDarthvader123]

Didn’t they make mirrored pairs?

[@MartenElectric]

No unfortunately they have never made mirrored pairs as they didn't deem it make that much of a difference by then.

[@trungnguyen-kd6wj]

Xin chao anh tay

[@7tikibart]

i could never EVER do this in my own living room, not even in someone elses living room. I don't know what to think about it...

[@MartenElectric]

yes, far from ideal, but I don't have place to do it otherwise :)