Infinity RS-4B Versus Infinifty Reference Six. A Common Guy's Perspective

InfinityDrew

Active Member
I think it's important to know that technically speaking I have very little knowledge when it comes to specs or science of what makes a speaker "Better" than another, however I think that might be helpful to someone who is just beginning to consider a purchase of classic Infinity speakers. I owned the RS-4B's first and fell in love with the sound, they do so much right that after buying and selling speaker after speaker I had finally found my taste in sound. I did wish for a little more in regards to the low end of the 4B's which provoked me to purchase the Reference Six in hopes of improvement to my occasional taste in Hard Rock, R&B and Metal. Below are my opinions when I did an A/B comparison of both speakers.

Equipment Used: Integra 60.5 Pre Amp / Ashly FTX Series III Amplifier (250w) HP Laptop Playing FLAC Hi Res Files

Music used Billy Joel - Movin Out, Dire Straits - Sultans Of Swing, Matchbox 20 - Push, Aerosmith - Living On The Edge, David Brubeck - Take Five.

SOUNDSTAGE: My first impressions of the Reference Six is that the sound was a little more full than the RS4B's, maybe it is the Six's midrange versus the 4B Polydome.. but to me, the Six's sound filled the air and I was able to hear the music better from different parts of the listening area. However when it came to separation it was no contest, the Six's were pleasant, instruments and voice were detailed but kind of blended together. The 4B's had me thinking Billy Joel's Piano was a separate part of the music that gave me goosebumps, The Guitar solo's in Sultans Of Swing seemed directional but in a good way.

BASS: To me the Reference Six low end was disappointing, the 10" woofers do not go as deep as the 8" woofers of the 4B's, the Six's bass is not bloated but doesn't have the quick, to the point, tight bass of the 4B's. I think the mid bass was more full with the Six's but in no way worth the tradeoff.

HIGHS: The Emit R's from what I have read on paper are better than the Emit Planar Tweeters of the 4B's. The High end I did enjoy from the Reference Six's, detailed, and to me a more enveloping sound and are not as directional, however the 4B's high's are airy and have a way of involving you in the sound that I can only describe as magic.. I just feel like I am a part of the music instead of just listening to it.

CONCLUSION: I do feel that the Reference Six is a good speaker, it does a lot of things well and if I had never heard the 4B's I would probably have a more favorable review of them. The Emit R is a great tweeter and the Six's play loud and clear. Although better than most, they just sounded more like other speakers of the 90's. One of the main reason's I fell in love with the 4B's is because until I heard them, I had never heard a speaker that sounded like them. I grew fatigued after an hour of listening to the Reference Six, as to where I could listen to the 4B's all day. I hate use the word magic but as I explained from the start of the review, I am not educated enough yet to explain to you what it is technically that I prefer between the two, I can only explain what my ears prefer, The RS-4B wins hands down in my opinion.
 
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To supplement the bass, I'd bet a decent subwoofer could help supplement the bottom octave. Cross over at around 50hz and you should have a full range system that would blow you away.

Thank you, that is my next venture. I think I'm going to sell both pairs of the Reference Six's a bought, hopefully at a profit, then buy two subwoofers. Hopefully that will cure my upgrade addiction for a little while lol.
 
Welcome aboard! Stick around, feel free to ask questions or offer help or information.
There are several smart Infinity owners in this section. And as long as AK exists this is one of the best sources for Infinity questions and answers on the internet.
Another great Infinity resource is Klaus's classic Infinity site http://www.infinity-classics.de/

I seem to be stuck on the RS series so I offer help or opinions on those models as I am most familiar with them.
In order, bought new in 1977 RSa. Since then RSM's in 1983, then RS II, Infinitesimal 0.2, and IL120s Subwoofer, all in 2016.
With encouragement and help from the other Infinity folks here I rebuilt and recapped the Infinitesimals, and recapped the RSM's and RS II's.

If you get the chance, try a sub with your 4b's.
I'm using a sub with my II's. Not that they really need it but it does add a bit more bottom end ooomph when I want it.
 
Welcome aboard! Stick around, feel free to ask questions or offer help or information.
There are several smart Infinity owners in this section. And as long as AK exists this is one of the best sources for Infinity questions and answers on the internet.
Another great Infinity resource is Klaus's classic Infinity site http://www.infinity-classics.de/

I seem to be stuck on the RS series so I offer help or opinions on those models as I am most familiar with them.
In order, bought new in 1977 RSa. Since then RSM's in 1983, then RS II, Infinitesimal 0.2, and IL120s Subwoofer, all in 2016.
With encouragement and help from the other Infinity folks here I rebuilt and recapped the Infinitesimals, and recapped the RSM's and RS II's.

If you get the chance, try a sub with your 4b's.
I'm using a sub with my II's. Not that they really need it but it does add a bit more bottom end ooomph when I want it.

Thank you, I was pretty sure those were 2B's in your profile picture. Hard to believe that these are considered Midfi considering those are a couple of levels up from my 4B's. I am taking your advice and am looking for the right Subwoofer.. I think it was you that suggested a servo. What sub did you did you choose to match your Infinity's? Until now I have always been reluctant in getting a subwoofer because I like the bass so much that I didn't want to compromise the sound.
 
I didn't think of this before the review but the guy I bought the Reference Six's from stated that He had gotten them from His Brother who had recently passed away. The Brother had a repair shop and said the speakers all had recently been re-foamed. Would a re-foam require a break in period like a new pair of speakers?
 
I didn't think of this before the review but the guy I bought the Reference Six's from stated that He had gotten them from His Brother who had recently passed away. The Brother had a repair shop and said the speakers all had recently been re-foamed. Would a re-foam require a break in period like a new pair of speakers?

yes, there is a small break in with new foams, but IMO you'll always be happier with the 4bs bass vs the Reference. I'm not particularly a fan of the reference series you're speaking of.

I adore my RS IIbs, and I also use them with subwoofers. If you like the 4, the II are a serious step up in sound quality. I also own a pair of rs 4bs. They are great speakers. IIb's are better.
 
Thank you, I was pretty sure those were 2B's in your profile picture. Hard to believe that these are considered Midfi considering those are a couple of levels up from my 4B's. I am taking your advice and am looking for the right Subwoofer.. I think it was you that suggested a servo. What sub did you did you choose to match your Infinity's? Until now I have always been reluctant in getting a subwoofer because I like the bass so much that I didn't want to compromise the sound.

Mine are just II's with the cone midrange. The IIa/b have the EMIM midrange.
I didn't suggest the servo sub but several people like them.
My sub is from the Interlude series, around 2000 I think. I stumbled across it at a garage sale. For $75 being an Infinity fan I couldn't leave it behind.

RS II http://www.infinity-classics.de/models/Reference-series-1+b-2-10+A+B-1981-86/index-Reference.htm

RS IIa/b http://www.infinity-classics.de/models/Reference-series-1+b-2-10+A+B-1981-86/index-Reference.htm

I had the Dayton Audio Sub 1200 before the Infinity sub. The Dayton is a good bang for the buck sub, several AK members have them and like them. Far from the best but for the money pretty darn good.
https://www.parts-express.com/dayton-audio-sub-1200-12-120-watt-powered-subwoofer--300-629
 
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Thanks for an honest and informative post and thread. I'm always a bit leary of posting side by side comparisons for fear of making someone feel bad about their own speakers. My CS3008 are very similar to the RS6 but rear ported. They were a bit boomy after a refoam but settled in nicely. I am never fatigued after long listening sessions. They sent packing my Kappa 6.1, a very nice speaker in it's own right. I've never heard either of the speakers discussed in this thread.

I own two pair of Qb and one of RSb and love the planar EMIT. I really don't notice much of a drop-off with the domed EMIT-R on the CS, even though I seem to prefer soft domes over metal ones. The well x-overed 4-way configuration and tower design keeps the Crescendos in rotation over their 3-way bookshelf cousins.

Right now I am in a long term shoot-out with the CS3008 and some very similar 4-way Kirksaeter Tower 260. So close it's scary. I am hearing the subtle nuances of the sort described in the OP's first observations. It's a tough one.
 
Thanks for an honest and informative post and thread. I'm always a bit leary of posting side by side comparisons for fear of making someone feel bad about their own speakers. My CS3008 are very similar to the RS6 but rear ported. They were a bit boomy after a refoam but settled in nicely. I am never fatigued after long listening sessions. They sent packing my Kappa 6.1, a very nice speaker in it's own right. I've never heard either of the speakers discussed in this thread.

I own two pair of Qb and one of RSb and love the planar EMIT. I really don't notice much of a drop-off with the domed EMIT-R on the CS, even though I seem to prefer soft domes over metal ones. The well x-overed 4-way configuration and tower design keeps the Crescendos in rotation over their 3-way bookshelf cousins.

Right now I am in a long term shoot-out with the CS3008 and some very similar 4-way Kirksaeter Tower 260. So close it's scary. I am hearing the subtle nuances of the sort described in the OP's first observations. It's a tough one.



Big differences between the Crescendo series and the Reference series. Crescendo series was custom built for Circuit City. essentially a slightly cheaper Kappa speaker. thicker walls, stronger reinforcement, crossover, etc etc. Personally, I think the 3007-3009 are fantastic speakers, and worth considerably more then the market shows, I have two pair of 3009, two pair of 3007.
I think the Crescendo 3007 are better then my RS 4b in every way, from bass response to clairity. The RS IIb beat them(crescendo) out in clarity and seperation, due to the multiple EMIM/EMIT drivers.

hope this helps!
 
Thanks for an honest and informative post and thread. I'm always a bit leary of posting side by side comparisons for fear of making someone feel bad about their own speakers. My CS3008 are very similar to the RS6 but rear ported. They were a bit boomy after a refoam but settled in nicely. I am never fatigued after long listening sessions. They sent packing my Kappa 6.1, a very nice speaker in it's own right. I've never heard either of the speakers discussed in this thread.

I own two pair of Qb and one of RSb and love the planar EMIT. I really don't notice much of a drop-off with the domed EMIT-R on the CS, even though I seem to prefer soft domes over metal ones. The well x-overed 4-way configuration and tower design keeps the Crescendos in rotation over their 3-way bookshelf cousins.

Right now I am in a long term shoot-out with the CS3008 and some very similar 4-way Kirksaeter Tower 260. So close it's scary. I am hearing the subtle nuances of the sort described in the OP's first observations. It's a tough one.

You're welcome , I did struggle with writing the review.. As I admitted I am just a guy who likes music and has a new admiration for Classic Infinity speakers. My technical knowledge is limited but is growing daily as I read this forum. I take people's opinion's lightly as they should mine, I have read plenty of post's on this forum where people have praised the Reference Four, Five & Six. I've seen a few say they preferred the six's over the Kappa's, and the RS-IIIB / A which to my ears I can't fathom.. I tend to listen closely to the opinion's of Jazzman, Goodolpg and Tedrick because their knowledge and them having the same admiration for the RS Series as I do. I've seem posts where Jazzman has praised the CS speakers you have.

I have owned a few "High end" speakers that in many people's opinion are better than the RS line. I owned a pair of Paradigm Studio 100's v3 and a pair of Definitive Technology BP-8040 ST's that in the end I felt I could live without. . As of now, I think I am going to try the RS-IIIA's or the RSIIB But I still wouldn't part with my 4B's.
 
yes, there is a small break in with new foams, but IMO you'll always be happier with the 4bs bass vs the Reference. I'm not particularly a fan of the reference series you're speaking of.

I adore my RS IIbs, and I also use them with subwoofers. If you like the 4, the II are a serious step up in sound quality. I also own a pair of rs 4bs. They are great speakers. IIb's are better.

I believe you're are correct. I'm going to sell the Reference Six's which I now have 2 pair of, just couldn't pass up the deal for both in the end. I will hopefully be able to find a nice pair of IIB's out there or settle for the IIIA. . But that will probably leave me with the upgrade thoughts if I settle lol.
 
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I am kind of like you. I've always been a music/stereo guy but only been back in the gear game for a few years. I too rely heavily on the Infinity opinions of those same guys. "They know of what they speak." I, like you, plod through specs learning as I go and trust what my ears tell me,
 
Jazzmans said: "Big differences between the Crescendo series and the Reference series. Crescendo series was custom built for Circuit City. essentially a slightly cheaper Kappa speaker. thicker walls, stronger reinforcement, crossover, etc etc. Personally, I think the 3007-3009 are fantastic speakers, and worth considerably more then the market shows, I have two pair of 3009, two pair of 3007.
I think the Crescendo 3007 are better then my RS 4b in every way, from bass response to clairity. The RS IIb beat them(crescendo) out in clarity and seperation, due to the multiple EMIM/EMIT drivers.

hope this helps! "


For some reason my quote function not working. That is cool you compared CS3007 to RS4b. I thought I was speaking blasphemy back when I favorably compared the IMG mid to the Kappa Polydome. I know you are a big fan of the CS series. I also compared the 08 to stacked Qbs fora short while which was interesting. There's something about 4-way speakers that just seems to fill out the spectrum better to me. It could all be in my mind.

I really like the sound of the Original Large Advents but next to the Qb there was just something missing and I feel the same for most of my 3-way to 4-way comparisons. I still plan to tighten up the cabs and redo the crossovers on all four Qbs and try that compare again. In due time.
 
Jazzmans said: "Big differences between the Crescendo series and the Reference series. Crescendo series was custom built for Circuit City. essentially a slightly cheaper Kappa speaker. thicker walls, stronger reinforcement, crossover, etc etc. Personally, I think the 3007-3009 are fantastic speakers, and worth considerably more then the market shows, I have two pair of 3009, two pair of 3007.
I think the Crescendo 3007 are better then my RS 4b in every way, from bass response to clairity. The RS IIb beat them(crescendo) out in clarity and seperation, due to the multiple EMIM/EMIT drivers.

hope this helps! "


For some reason my quote function not working. That is cool you compared CS3007 to RS4b. I thought I was speaking blasphemy back when I favorably compared the IMG mid to the Kappa Polydome. I know you are a big fan of the CS series. I also compared the 08 to stacked Qbs fora short while which was interesting. There's something about 4-way speakers that just seems to fill out the spectrum better to me. It could all be in my mind.

I really like the sound of the Original Large Advents but next to the Qb there was just something missing and I feel the same for most of my 3-way to 4-way comparisons. I still plan to tighten up the cabs and redo the crossovers on all four Qbs and try that compare again. In due time.

I think I will take a listen to the Crescendo's as well, If they are beating my 4B's in every way it's def an option and I can get them cheaper than the RS-IIIA
 
Big differences between the Crescendo series and the Reference series. Crescendo series was custom built for Circuit City. essentially a slightly cheaper Kappa speaker. thicker walls, stronger reinforcement, crossover, etc etc. Personally, I think the 3007-3009 are fantastic speakers, and worth considerably more then the market shows, I have two pair of 3009, two pair of 3007.
I think the Crescendo 3007 are better then my RS 4b in every way, from bass response to clairity. The RS IIb beat them(crescendo) out in clarity and seperation, due to the multiple EMIM/EMIT drivers.

hope this helps!

Jazzman, with that said, I can assume that you favor the Kappas over the RS Line as well? Do you prefer the original Kappas to the 2nd generation?
 
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Thanks for an honest and informative post and thread. I'm always a bit leary of posting side by side comparisons for fear of making someone feel bad about their own speakers. My CS3008 are very similar to the RS6 but rear ported. They were a bit boomy after a refoam but settled in nicely. I am never fatigued after long listening sessions. They sent packing my Kappa 6.1, a very nice speaker in it's own right. I've never heard either of the speakers discussed in this thread.

I own two pair of Qb and one of RSb and love the planar EMIT. I really don't notice much of a drop-off with the domed EMIT-R on the CS, even though I seem to prefer soft domes over metal ones. The well x-overed 4-way configuration and tower design keeps the Crescendos in rotation over their 3-way bookshelf cousins.

Right now I am in a long term shoot-out with the CS3008 and some very similar 4-way Kirksaeter Tower 260. So close it's scary. I am hearing the subtle nuances of the sort described in the OP's first observations. It's a tough one.

Tom, It is odd, I was checking out the Crescendo CS-3008 and they look almost identical to the Reference Six's.. Interesting that the CS is a much better speaker than the Six. I know that Jazzman said the CS was built much better, I'm gonna check out the specs and see what the deal is now that I;m interested
 
Tom, It is odd, I was checking out the Crescendo CS-3008 and they look almost identical to the Reference Six's.. Interesting that the CS is a much better speaker than the Six. I know that Jazzman said the CS was built much better, I'm gonna check out the specs and see what the deal is now that I;m interested

Hey Tom, found this on the Forum from Audiokarma member V'ger:

"There is significant difference in the crossovers. The overall design is similar, but every inductor and capacitor is different. The Emit-R crosses at 3000Hz for the 3008 vs 4000Hz for the R6. The tweekter circuit breaker is rated 1.25A, 30V for the CS 3008 versus 1.0A/30V for the R6. This makes sense with the lower crossover frequency likely causing the EMIT-R to draw more current between 3000 and 4000 Hz.

Mid- Range to Mid-Bass crosses at 800 Hz for 3008 and at 1500Hz for R6.

Bass X-cover is listed at 200Hz for both even though the low pass parts are different (the woofers have different part numbers). If you decide to recap, the R6 may be easier to find (125uF vs 277uf, both NPE).

Frequency Response is 45Hz - 35KHz for CS3008 and 34Hz - 40KHz for R6. My testing at the low end with a frequency sweep shows the R6 just becomes audible at 34Hz, not near -3 or -6db. I haven't anything to measure the 40Khz claim of the Emit-Rs. I suspect it is PR numbers rather than real numbers.

The CS 3008 Cabinet should be .5 inch shorter, but 3 inches deeper, so should have more interior volume. The woofer should reach lower than the R6, if the woofers have comparable specs. The R6 was meant for mass market, so I expect the specs were stretched to make them look more attractive. the CS list price was $1599/pair vs $999/pair for the R6."
 
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