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Infinity Speakers Pursuit of Perfect Sound

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Old 01-28-2017, 09:15 AM
RVito RVito is offline
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Default IRS Beta

Hello folks. I am getting ready to rebuild my beloved Betas and I am looking for some advice as far as what brand of Caps and wire to use. Thanks for any information.
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Old 01-28-2017, 10:52 AM
AudioGremlin AudioGremlin is offline
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Hi, Paul McGowan of PS Audio may be able to offer some help. He rebuilt his Infinity Reference speakers.
I experimented with several capacitors for the passive x-over on my RS1b's and settled with Mundorf. Cables also changed from Monster to VdH.
Hope this helps. Allan
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Old 01-29-2017, 02:45 PM
lwschwartz lwschwartz is offline
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Hi, When we worked on rebuilding the crossovers for our IRS V's, Arnie Nudell recommended the following list of components to us. I would suspect there may be some similarity it what you should use:

· Mundorf MKP capacitors
· Goertz foil inductors for the tweeters and midrange low pass filters
· Jantzen Permite core inductor for the midrange high pass filter
· Metal film precision resistors, using multiple resistors instead of single large wire-wound cement filled type
· Metal film resistors and a 12 position switch instead of the rheostats

Best of luck with your project. The change was a big improvement for us.

Larry
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Old 01-29-2017, 09:41 PM
RVito RVito is offline
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Should the Wondercaps be replaced?
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Old 01-29-2017, 10:26 PM
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Wow. The depth of experience, knowledge and willingness to share is remarkable in this forum. Go us
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Old 01-30-2017, 03:43 AM
AudioGremlin AudioGremlin is offline
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Quote:
Originally Posted by RVito View Post
Should the Wondercaps be replaced?
Imo definitely. Apart from the deterioration with age I found that other capacitors like Mundorf etc. are much improved.
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Old 02-25-2017, 11:07 AM
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I would speak with Bill Legall, owner of Millersound. Bill is a consummate craftsman and has experience with rebuilding the planar drivers on Infinity speakers. When I last spoke with him, he owned a couple of pair of IRS V's.
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Old 07-05-2020, 11:41 PM
NZ421291 NZ421291 is offline
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Quote:
Originally Posted by RVito View Post
Hello folks. I am getting ready to rebuild my beloved Betas and I am looking for some advice as far as what brand of Caps and wire to use. Thanks for any information.
How did the rebuild pan out?
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  #9  
Old 08-14-2020, 06:09 PM
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Crumhorn Crumhorn is offline
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As an IRS Beta owner myself, I would also like to know!


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Old 01-01-2021, 11:02 AM
CR500 CR500 is offline
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Another Beta owner who would like to know!

Was playing with my setup and spectrum analyzer last week. Trying to cure huge dead spot in the spectrum around 70 Hz (bad room acoustics). While playing, I discovered the EMIT and EMIM controls weren't working. I'm going to get some replacements rather than cleaning. Could only find wire wound types (5 ohm 5 watt).

Anyone know where to get one of the standoffs for IRS Beta woofer grills? They look the same as those used on the other cabinet, just with the addition of a bushing.

Were they used on any of the other speakers?

How do you remove them from the grill (do they unscrew or pull off)? If I can get one out, I'll try to scan and 3d print them, just want to make sure I'm not going to break anything when attempting to remove (they're all very tight).

... and the foam inside the passive crossover box has deteriorated on mine. Probably the same for everyone as well. Time to pull it out and replace before it becomes a sticky mess!

Thanks!

Rob

Last edited by CR500; 01-01-2021 at 04:06 PM.
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