Hello....

How can I tell Infinitesimal model .1, .2, and .3 apart?

I have seen some in all black; did the .1 come in all black also?

I have never seen one in person but of all the fotos that I have seen they all look the same.


Thanks!

Nel

I have a pair of 0.1's, one of which is pictured in my avatar, with the 5" Watkins woofer and Emit tweeter, and to my knowledge they were only sold with wood end caps and trim and an optional wall mounting bracket. From the schematics on the Infinity Classics website, it would appear that the only difference between the 0.1 and 0.2 was the crossover but I have no other information to verify that. The 0.3 apparently had a conventional 5" woofer and the Emit and was made in two models, one similar in appearance to the earlier versions except with black plastic end caps and trim, and one for use in cars which also came in some sort of black plastic housing. The crossover was obviously different than the other two since the woofer did not have dual voice coils.

If anyone can provide contradictory or otherwise different information I will stand corrected, but the above is what I've been able to glean from available sources.

- The 0.1 had a Watkins woofer and no "contour" switch
- The 0.2 had a Watkins woofer and a "contour" switch
- The 0.3 did not have a Watkins woofer and had a "contour" switch

The 0.1 and 0.2 had a recessed area where the speaker terminals and the (exposed) fuse was, while the 0.3 had the speaker terminals flush mounted with the back of the cabinet and had a cover over the fuse.

I'll echo Coastsider - "the above is what I've been able to glean from available sources."

David

- The 0.1 had a Watkins woofer and no "contour" switch
- The 0.2 had a Watkins woofer and a "contour" switch
- The 0.3 did not have a Watkins woofer and had a "contour" switch
David

I somehow never noticed that difference before on the xover schematics. I guess my 0.1's are actually 0.2's since they have the contour switch. I stand corrected.

You learn something new every day.

I somehow never noticed that difference before on the xover schematics. I guess my 0.1's are actually 0.2's since they have the contour switch.

Same thing happened to me, I thought I had a pair of 0.1's but they're actually 0.2s. Still looking for a pair of 0.1s.

David

Same thing happened to me, I thought I had a pair of 0.1's but they're actually 0.2s. Still looking for a pair of 0.1s.

David

Since they are "essentially" the same, Watkins woofer and all, why 0.1's as well as your 0.2's, although having perused the Infinity section of your website, I suspect that I am asking a really naive question so never mind. A very impressive collection indeed.

I guess I'll just stick with my 0.2's.

Same thing happened to me, I thought I had a pair of 0.1's but they're actually 0.2s. Still looking for a pair of 0.1s.

David

are the 0.1s supposed to be better, or is it merely a collector's thing? in either case, feel free to send the 0.2s my way when you find the 0.1s!! :thmbsp:

chris

Thanks a lot!

This is really helpful information.....

I would definitely like to know what I am getting......

I have been looking at them and I would like to get a pair in the near future....

Could you gentlemen be kind enough to post fotos of at least the model .1 rear?

Thanks!

are the 0.1s supposed to be better, or is it merely a collector's thing?

Purely a collector's thing, I have never heard that there is any substantive performance difference between the 0.1 and the 0.2. I really like my 0.2s, doubt the 0.1 would offer me anything sound-wise. I just like to be thorough.

David

Could you gentlemen be kind enough to post fotos of at least the model .1 rear?


Pretty sure this an 0.1.

David

Looks like it has a contour switch though.

And why would someone paint it black?

Looks like it has a contour switch though.

And why would someone paint it black?

You may be right, I was thinking it was slots for a cover, but it may be a contour switch. In which case, I'm not sure I've seen an 0.1.


I think Vito has some, hopefully he'll pop in and shed some light on this.

David

Hey guys, I'd be interested to know -- how do they sound? I presume they do NOT resemble LS3/5A speakers. To those who may have heard both Watkins and non-Watkins, is there an audible difference?

the rs 0.1 have grey dual coil watkins woofers and contour switch, i have one pair.

rs 0.2 and rs 0.3 both have 2 switches and clear (0.2 dual coil and 0.3 single coil) woofers.


best regards.


Pio

the rs 0.1 have grey dual coil watkins woofers and contour switch, i have one pair.

rs 0.2 and rs 0.3 both have 2 switches and clear (0.2 dual coil and 0.3 single coil) woofers.

Interesting, the schematics on the 0.1s don't show a contour switch. Can you give us a picture? And what are the 2 switches for on the 0.2 and 0.3 - the schematics show only one switch on either of them.

David

the rs 0.1 have grey dual coil watkins woofers and contour switch, i have one pair.

rs 0.2 and rs 0.3 both have 2 switches and clear (0.2 dual coil and 0.3 single coil) woofers.


best regards.


Pio

Interesting.

Given that info, I don't think I've ever seen any 0.1's for sale as all I've seen had clear poly Watkins woofers. There may be lots of other Infinitesimal owners out there who think they have 0.1's but have 0.2's instead as much of this is new information to me. I'm not mad or even remotely concerned - they still look and sound just as good. It just takes a tiny bit of the edge off of their provenance, as they say on Antiques Roadshow.

if you check the three schematics there is a switch in the woofer circuit in all the models (a-b), and a switch in the tweeter circuit just in 0.2 and 0.3.


http://www.infinity-classics.de/infinity/technik/infinity-datenbank.htm

i will post pictures soon.


best regards.


Pio.

Interesting, the schematics on the 0.1s don't show a contour switch. Can you give us a picture? And what are the 2 switches for on the 0.2 and 0.3 - the schematics show only one switch on either of them.

David

I think the contour switch (for the woofer) is shown just below the 1200uF cap on the 0.1 schematic.

It is in the same place on the 0.2 schematic, with the addition of the slide switch for the tweeter.


Yeh, what he said. I can't type any faster.

the countour switch is for the woofer (in rs 0.1 is marked "contour") same function in 0.2 and 0.3. the tweeter switch in 0.2 and 0.3 iirc is marked (labeled) "pressence" i think is for atenuate the hf output.


Pio

Funny, I had never noticed the switch in the woofer circuit before, I'd always been looking at the one in the tweeter circuit. So that means if we only have a single switch, marked "Contour", we have 0.1s after all?

David

yes :yes:

summary:

rs 0.1 single switch and grey double coil woofer
rs 0.2 2 switches and clear double coil woofer
rs 0.3 2 switches and clear single coil woofer

all this aplies in original state

remember the repaired ones around.


ps.

and another difference is much more robust speakers conectors on rs 0.1, i use 12 gauge cable with these.



Pio

Pio,

could you post a foto or two of the front and rear of your .1, so that we can learn how to identify them?

Many people who are selling them are never sure of what they have..

Thanks!

Nel

summary:

rs 0.1 single switch and grey double coil woofer
rs 0.2 2 switches and clear double coil woofer
rs 0.3 2 switches and clear single coil woofer



Mine have clear Watkins woofers and both switches so they are 0.2's. Good to know.

Oh, and the tweeter switches on mine are labeled "tweeter".

as promised rs 0.1 photos

i plan to sell these soon.



Pio

as promised rs 0.1 photos

Pio

Well then that means the back is different on the 0.1's as well because my (now I know) 0.2's have the recessed connectors and open fuse.

I'm getting confused all over again.

Now things seem a litle clearer to me......

AK is great!

Thanks a lot!

Nel

Slightly off topic but there seem to be a few Infinitesimal experts assembled here...

I notice the listed Infinity replacement for the original dual voice-coil Watkins in the Infinitesimals is the single coil 902-0470 which is used in the rest of the Reference '78 series as a mid-range.

Has anyone used these as a replacement? I imagine they don't get down as low as the Watkins, but I'm musing over a project to make some replica Infinitesimals as the 902-0470 and the EMITs are still occasionally available.

Just wondering how it would sound....

- Neil.

Neil,

Hello!.....

Why don't you start your own thread about that sudject?

Identifying Infinitesimals was the main purpose here and there is still some confusion......

Thanks!

Nel

Apologies - hadn't realized it was a hijack as I thought the differences had been cleared up!

I'll repost....

- Neil.

Just for the sake of argument, here is a shot of the back of one of my Infinitesimals, now assumed to be the 0.2 version. There is kind of an optical illusion so I will clarify that the top section with the switches sticks out slightly from the rest of the cabinet, and the bottom section with the connectors and fuse, is recessed about three quarters of an inch.

The front is as indicated in my avatar. I also noticed that the small round Infinity logo is in the lower left hand corner on mine and in the lower right in the 0.1 photo posted by yo00.

I can definitely identify the Infinitesimal .1 now.....

But........I am not sure I can tell the difference between model .2 and model .3, at least not in fotos.

i thought that the 0.3s had completely different enclosures, shorter and more rounded, more modern looking (aka more BPC-ish). i've seen a pair on eBay once or twice. the speakers i'm thinking of have the metal grill wrapping around the side AND top edges. i'm not very good at describing such things, but does that sound familiar to anyone? maybe it was a later, completely unrelated infinitesimal variant...

http://www.infinity-classics.de/infinity/models/Reference-series-1978-klein/RS_brochure_RS_0.1_III.jpg

This makes the 0.3 look pretty much the same as the 0.1 and 0.2 - same dimensions and probably came in timber finish as well.

The only way I can think of easily telling a 0.3 from the front is to look for 2 wires terminated in the front of the woofer cone for the 0.3 and 4 wires for the 0.2 and 0.1 (both these have the dual voice-coils)

- Neil

This makes the 0.3 look pretty much the same as the 0.1 and 0.2 - same dimensions and probably came in timber finish as well.

The only way I can think of easily telling a 0.3 from the front is to look for 2 wires terminated in the front of the woofer cone for the 0.3 and 4 wires for the 0.2 and 0.1 (both these have the dual voice-coils)

- Neil

I haven't seen that ad page before so thanks for posting it. I don't think the 0.3 did come with wood trim - just black plastic. There was a pair for sale a short time back on "that" auction site and the seller made a point of saying that they were 0.3's and if you were looking for 0.1's or 0.2's, not to bid.

Between all of us I guess we've pretty much figured it out.

There was a pair for sale a short time back on "that" auction site and the seller made a point of saying that they were 0.3's and if you were looking for 0.1's or 0.2's, not to bid.

It's here :

http://cgi.ebay.com/EMIT-Infinity-Infinitesimal-0-3-bookshelf-speakers-RARE_W0QQitemZ150266111822QQcmdZViewItem?hash=item 150266111822

Clearly 0.3's. Good to see an honest listing...


This one, however was not so accurate :

http://cgi.ebay.com/INFINITY-INFINITESIMAL-Reference-Standard-Speakers_W0QQitemZ280247067911QQcmdZViewItem?hash= item280247067911

Difficult to see for sure but they look like 0.3s as well. Definitely not 0.1s as stated.

- Neil.

ah, i did see that ad once but just noticed the car speaker. ok, it all appears settled, then. :)

How about this one with the EMIT SIDEWAYS?

Never seen one like this before.....

Did they come like that from the factory?

By the way, this is the model .2

Because the sound dispersion from an EMIT is in a mainly horizonatal arc you have to rotate them when you want your speaker to be on its side.

Some are rotatable by loosening a couple of screws. Others have to be totally unscrewed from the box first.

- Neil

This has been fun following this, it seems sorted out now. :headscrat I have the 0.1's and the 1/2" wide oak strips on the sides are held in place by pressure from the grilles and end caps. I have also seen the strips held in place by screws. So the question is what model do you have and how are the side strips retained? Just to throw in another twist. :scratch2:

mine 0.1 held in place by pressure too.

0.2 with screws (thank you Coastsider for the correction)
0.3 with screws

Pio

mine 0.1 held in place by pressure too.

0.2 by pressure
0.3 with screws

Pio

Sorry to throw a monkey wrench into this but on my 0.2's the trim strips are held in place by three screws (per side) which also hold the grills in place.

And just to reiterate, they have both the contour and tweeter switches and the recessed connectors/open fuse, and Watkins clear poly woofers.