Infinity RS 1B Please Read

Speaker Asylum

General speaker questions for audio and home theater.

Actually while the Original Infinity IRS Series V's are indeed a 3 way LINE SOURCE ( Tweeters, Midranges & Woofers with crossovers at 74 Hz and 4500 Hz ) the RS-1 and RS-1b are not.

The RS-1 and RS-1b are actually 6 way point sources, with the point source centered at the 3rd EMIM down ( and this single EMIM actually does 85 % of all the work of the whole speaker system - yes out of the great big RS-1 and RS-1b system you are almost exclusively listening to one 3 in x 5 in EMIM, all the rest of the speakers just supplement this one driver). Let me explain further.

The RS-1 and RS-1b's have crossovers at 150 Hz, 700 Hz, 3000 Hz and 8000 Hz.

The two woofer columns, each made up of 6 standard 8 inch woofers function below 150 Hz.

The top two, and bottom 4 EMIM's operate from 150 Hz to 700 Hz.

The 3rd EMIM down from the top operates from 700 Hz to 3000 Hz.

The top and bottom from tweeters operate from 3000 Hz to 8000 Hz.

The center front tweeter ( with the small CAP on the front ) actually acts as a Super Tweeter and only functions above 8000 Hz.

The rare tweeter operates from 3000 Hz on up.

So you see the original system has all these drivers but all the real work is done by the 3rd EMIM down from the top.

That is why if you put your ear right up to the drivers all you actually hear anything coming out of is the 3rd EMIM from the top, it is much louder than the rest.

Also as you turn up the system and play it loud, this is the driver that screaches and eventually if you tuen it up too loud it will blow.

I have even know people to catch this driver on fire, yes on fire.

Each crossover point introduces distortion, phase distortion, harmonic distortion and intermodulation distortion.

The more crossover points the worse this is, and since this speaker has a lot of crossover points, there is a lot of distortion, especially phase distortion with this design.

Also power handling capability is limited in this design because it is as only good as the weakest link, and in this case that is the 3rd EMIM down from the top.

To get any significant LOW BASS at all out of the Eight Inch Woofer Columns Infinity needed to introduce a BASS EQUALIZATION CIRCUIT which they incorporate into the unit they called a " Reference Standard Servo Crossover ". However this is NOT A TRUE SERVO unit as NONE of the WOOFERS are outfitted with an ACCELEROMETER so this " SERVO " supplied by INFINITY is not a TRUE SERVO at all. It can boost the LOW BASS, which would be putrid without it, but it can not correct for , UNDERSHOOT of the Woofers, OVERSHOOT of the Woofers, Harmonic Dirtortion or Intermodulation Distortion. A true Servo System with an ACCELEROMTER as seen in the INFINITY IRS Series V at least has one woofer with a true accelerometer and can at least partially act to correct these problems. Not so on the Infinty RS-1 and Infinity RS-1b Systems

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Herbie's Audio Lab

Topic - Infinity RS 1B Please Read - Ampzilla 15:36:19 05/16/12 (5)

RE: Infinity RS 1B Please Read - JLindborg 09:47:08 03/23/14 (0)

Speaker works just fine after 27 years - ruxtonvet 06:54:41 05/17/12 (0)

RE: Infinity RS 1B Please Read - Pro Sound Guy 06:27:39 05/17/12 (1)

RE: Infinity RS 1B Please Read - Ozzie 18:31:48 05/17/12 (0)

RE: Infinity RS 1B Please Read - Ozzie 16:33:47 05/16/12 (0)

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