[marantzman2325]

I have a set of what I believe to be Dynaco 3 way tower speakers probaby from late 60"s There are only suppose to be 2 way Dynaco"s Did they ever make a 3 way tower?each have a 10" woofer a 4" mid and a 1"what appears to be a peerless tweeter it has a green tint to the cone.On the back of the cabinet is the rectangle port all A25 dynacos have with the screen and fiberglass batting There are 2  level knobs 1 high and one for mids,Cross over system is extravagant.Each speaker weighs approx 90 lbs.Real wallnut vainer 3/4 of the way up.Top 1/4 houses all drivers and is black in color.The covers are a dark brown tweed.These are fully internally braced and built heavy duty.Every one say"s  "dynaco didn't build a 3 way tower" I am looking a a pair in my listening room.Sound is warm and sounds great with my Marantz 2325 and my McIntosh MCD 7000 CD player.I have a pair of Pioneer HPM100's But these have a warmer sound.Any help in verifying what I have will be greatly appreciated  Thanks  Troy M

[Wayner]

Scan Speak and Seas of Norway built almost all of the Dynaco Line. I think folks at Dynaco helped choose drivers and helped with the voicing and gave the final thumbs up on the design. I don't think your speakers are from this co-operation. However, They certainly could be made by Peerless, Scan Speak or even Seas. The truth will come out if you examine all of the drivers. If they are all the same brand, there you go. If it's a mixed bag of drivers, it was a design spec built for someone else. Dynaco had other relationships in Europe with companies like Tandberg. I have also seen the name Dyna/Empire which raises my eyebrow from time to time.

Frank Van Alstine is probably one of the best sources of info about the Dynaco line. I believe he told me he was once at the factory, in New Jersey. Clearly the whole topic is truly fascinating, but the history of the early days of Dynaco is elusive.

I will try to dig further, tonight.

Wayner

[goldlizsts]

I have a set of what I believe to be Dynaco 3 way tower speakers probaby from late 60"s ........

"Tower" Dynacos, 3-way even, from the 60's?  Someone should really shed some light on the subject.  Interesting.

[KBK]

Literally yesterday, while researching my A-50's, via google images, I found website that had a picture of the Dynaco 3-ways. Or the scanspeak 3-ways.

IIRC, they were introduced into Canada as a separate brand, as Dynaco did not want to market the biggest 3-way unit. Since they were a 3-way with a single 6" cast basket scanspeak mid, you can imagine the efficiency and power handling of that mid!

I've seen a pair in person,as late as 1986-88 or so, and in MINT condition, for sale, in a retail shop, as 'old stock'. I wanted them badly, but was totally broke at the time. I was told they were quite rare, and I believed it.

The mid driver has ribbed paper cone, IIRC. It is in the upper right corner.

The three way I'm aware of has the two 10" bass drivers. It's quite big-ass. Bigger than an A-50.

[Wayner]

KBK,

I saw the pics you found on Google. Those speakers are big ass speakers, with 2 10" woofers, 1 probably 6" midrange and 2 1-1/2" domed tweeters! There must also be 3 chambered areas inside as there are 3 aperodic vents visable in the front. They do look "Dynaco-ish". I almost robbed the pic to post here, but that's not nice. I think one and a half times bigger than the A50's?

Wayner

[KBK]

We need a picture of the things to do a proper search. For example, they could be early RFT brand speakers. Before they were making/labeling their own drivers.

Wayner: Just post the link for the image, if possible. I went searching for it again, and could not find it.

[James Romeyn]

Even in a bedroom, my old Dynaco A50 sucked up so much power that the Phase Linear 400 amp front panel lights dimmed on power pulses, as did all the lights in the entire house built in the late '40s.  But they were GREAT monitors for my ARP 2600, EML synthesizers, etc. 

At first I thought no way they made a tower like that, but then maybe the RFT thing or something like that (RTR?) may ring a bell....

I still like A25s!  But from that era the Braun/ADS line are absolutely untouchable.  Oh, the good ole days when the world's best speakers cost about $800/pr..............................!  And were sold at Pacific Stereo stores scattered all over the place!  But at that time it might as well have been $80k.   

[Wayner]

Here is the link http://www.praudio.co.uk/dynacoa25.htm

Sounds like they are made by ScanSpeak.

Wayner

[James Romeyn]

Man they are weee-aaard looking.  Bet they don't sound half bad though.  I'd suggest tweeters approximately at ear height & if mirror imaged, tweeters on the inside.

I wouldn't be concerned about the non-vertical driver alignment...VMPS' old Tower II w/ the arc array of mid-treble drivers (mirror imaged pairs) blow away all later "SE" versions having drivers in the audiophile-approved straight vertical array.   

[Dawkus]

Hi Marantzman,
In 1977 or 1978 Dynaco introduced what sounds to me as the Phase Linear 3.It had a time alligned driver configuration with a 13 inch woofer that was more toward the listeners ear than the tweeter that was set back as the midrange.The 3 other speakers that came out that year were a smaller version of the Phase Linear 3,the remake of the Dyna A-25,not the XL,but the Dyna A-25 Mark2,and the Dyna A-30-XL.I owned both,my brother still running the A-30-XL's presently,a 3 way bookshelf.I would do anything to have my A-25 Mark-2's back...real veener,and tweeter right above the woofer,not to the right.....I have all the paper work to back this,and if you want some copies I'd be glad to help you ....this is my first post...Mark Korda(mark.korda@myfairpoint.net)

[Wayne1]

Marantzman2325,

It could be you have a pair of Model 60's



There was a bit of a thread about them over on Audio Asylum

Dynaco Model 60

[James Romeyn]

The 10 & tweeter do indeed seem to be replicas of the same drivers in my A50 (sold decades if not centuries ago). 

The A50s were likely the lowest sensitivity speakers I've owned or auditioned.  In a bedroom, powered by a Phase Linear 400, the amp's meter lamps & all the lights in the house would dim to the beat of music at high levels; they could probably handle twice the power or more. 

A50s were very smooth, lacking midrange presence, a balance more preferable than the opposite extreme.  They played louder than the smaller Dynacos but most likely the tonal balance of the smaller speakers was better. (A slim tall D'Appolitto affair w/ two tweeters in the middle flanked by two 10s would fare better, but alas this architecture did not appear till later.) 

Some member or members here collect the ADS/Braun speakers of the same era, which must have been the best money could buy at the time.  I still wish I had a few pairs of them to audition.   
   

[Dawkus]

Marantzman and Wayne1,you might be the same,the Boulder cable guy is right !They are the Dyna 60's,the smaller brother of the Dyna 80,which was taller than 40 inches,was a 3 way,had a 13 inch woofer,(a measurement in woofers that I didn't forget.I'm still looking for the material I have stowed away to prove my point,but I'd bet the bank on it....Dawkus....Mark Korda(The Dyna 60 came out in 77 or 78 when it followed Technics idea of the tweeter being set back further to the ear than the woofer for phase linearity,which I could never understand because when you look at an orgestra(I can't spell),the flutes and strings always sit more foreward with the bass intruments,tubas,drums in the back?)I just found May 1978(Stereo/Hi-Fi Equipment)The Big Dyna with 13 inch woofer is the Dynaco Phase 3 Model 80.....here's the dimentions,which could be a mistake for the 60(42and5/8x15x11and3/4)the Technics top of the line in the phase seres was the SB-7000A....both went for 400 bucks then each...Dawkus

[James Romeyn]

All the notes about Dynaco 60/80 seem to ring a bell.  I seem to remember these models had a short lifespan.

The difference in path lengths of the various musicians in the orchestra to most audience members is small vs. the path length differences of speaker drivers to the listener.  Also, the various speaker drivers reproduce only certain portions of the spectrum.  A better analogy, if the listening room problem was applied to the orchestra, would require the different frequency spectrums of all the musicians to be split up, grouped together, then each grouping having a specific different path length.  Also, I think the first arrival problem does not exist in a commercial space. 

IMO the biggest difference in large (commercial) space vs. small (domestic) space reproduction is that bass behaves completely different in the two environments.