IRS Beta

[RVito]

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.

[AudioGremlin]

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

[lwschwartz]

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

[RVito]

Should the Wondercaps be replaced?

[cma29]

Wow. The depth of experience, knowledge and willingness to share is remarkable in this forum. Go us

[AudioGremlin]

Originally Posted by RVito

Should the Wondercaps be replaced?

Imo definitely. Apart from the deterioration with age I found that other capacitors like Mundorf etc. are much improved.

[W9TR]

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.

[NZ421291]

Originally Posted by RVito

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?

[Crumhorn]

As an IRS Beta owner myself, I would also like to know!


SOTA Cosmos TT (vacuum, Electronic Flywheel), SME V, Koetsu Rosewood Signature
Esoteric X-05 SACD player, Alesis ML-9600 mastering CD burner, Nakamichi 700 ZXE Cassette Deck
Pass Labs XP-15 phono stage
Pass Labs XP-30 (SS) & Hovland HP-100 (tube) preamps
Edge G8+ laser-biased monoblocks & Classé M-700 monoblocks
Rockport Atria & Infinity IRS Beta Speakers
Audience AU24 SX Phono cable, MIT Shotgun ICs, Shunyata Alpha SCs
Revelation Audio Labs 'Passage' CryoSilver Reference DualConduit DB-25 umbilical cables for Pass XP-30
Shunyata Denali 6000T power conditioner (on BBA platform), Shunyata Alpha NR, Delta NR, & Venom HC PCs. Also PS8 & 2 Venom Defenders.
Audio Magic Ultimate SHD Bees Wax Fuse, Synergistic Research Blue & Black fuses, Hi-Fi Tuning fuses
Klaudio LP200 ultrasonic RCM

[CR500]

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