[2025 PWK Pilgrimage/Birthday Bash/Chief Bonehead Class featuring the new Klipschorn AK7]

Thanks for providing this report. 

[Xilica XP active crossover integration into my system]

16 hours ago, tromprof said:

I recently incorporated a Mini_DSP Flex series in my main 2 channel system and the results are spectacular! 

 

I use a MiniDSP Flex Eight DL with my tri-amped La Scalas. I’ve been very happy with it.

[AUCTION: Klipsch La Scala AL6 All New Pre-Production (Active/Passive) S/N 001L & 001R]

I hope so. The whole point is to raise money.

[Subwoofer Recommendations for La Scala AL5]

12 hours ago, Bananaslug said:

Wanted to get some members' opinions regarding subwoofers. I have no personal experience but have read

 

If you haven’t used the room simulation function in REW I would urge you to do so in order to investigate subwoofer placement anf the optimal number of subs for your room.

I have paired my La Scalas with two minimally-sized THTLP subwoofers. The performance is very good. Four subs would be optimal for me but that isn’t going to happen for reasons of cost and WAF. A THT or THTLP build is about USD$1200 which is in the same ballpark as a low-end REL or SVS sub.

[Subwoofer Recommendations for La Scala AL5]

1 hour ago, Ossidian said:

Just purchased my first pair of Klipsch (La Scala AL5) and looking for recommendations for subwoofers.

My understanding is sub needs to be very fast and sealed. 

 

Better yet horn loaded (like a THT to THTLP). Depending on your room you may want more than 1 sub.

[subwoofer recommendations for La Scala AL5]

On 2/10/2025 at 12:56 PM, murali-reddy said:

Any owners of La Scala AL5 or old version using subwoofer?

 

Please share what subwoofers worked for you or any suggestion is appreciated.

 

Some one highly recommended https://mjacoustics.co.uk/reference-200/ for la scala's

 

thanks

After trying a Klipsch mass-market subwoofer (not up to the job) and an SVS SB-1000Pro (pretty good), I ended up building two THTLP subwoofers. They’re folded horns and IMHO a great match for La Scalas.

[Got my AL5's as upgrade to Forte IV's but I feel like I am missing something.]

11 hours ago, herberk said:

I need some input to help me think ... I had a set of Forte IV's driven by a Decware SEA84UFO 25th anniversary amp for a few years, I sometimes used my little Rega Brio amp on them too for things like watching movies both sounded amazing I was legitimately sad to see them go when I traded them in.

 

I decided to upgrade to the speakers I always looked on in awe the LaScala's after weighing options I opted for AL5's as I really like the old school analogue approach ( I built a few Bottlehead amps etc and like to play around with different amps etc) and AL6's although it looks AMAZING looks like it will do best with active bi-amping etc and I am not quite ready for that endeavor.

 

I got the AL5's hooked then up and initial reaction is mixed I will try summarize my experience ... (I am using a Rega Planar 8 with a Rega Apheta 3 Cartridge and a Rega Aria MK3 preamp)

 

Whats Great:

- Songs like Eva Cassidy - Fields of Gold and similar like Nora Jones sounds absolutely heavenly. So does most more laid back records I have think Simon and Garfunkel, Cat Stevens etc etc

- These things are FAST tracks like Paul Simon Graceland and Rhythm of the Saints really pop with drum solos sounding way more alive than the Forte's managed.

 

Things I miss:

- Tracks like Dire Straits Money for nothing lacks the punchy bottom end I got from the Forte's I feel like the Forte's added more contrast to help the track shine.

- Tracks like My Home town by Bruce Springsteen seem a little flatter this track has a punchy rhythm thats there and more energetic on the LS but not as punchy and contrasting.

 

When I decided to upgrade I considered going to Cornwalls but then went big and got the LS.

 

So after a LONG ramble question for folks who know both speakers, do I wait for the LS to run in a few hours get used to the lack of punch (perhaps add a sub at some stage although researching this seems a mixed bag) and appreciate all thats amazing or do I return them (limited time to do so) and get Cornwalls and go back to the more familiar sound of the hybrid speakers. I am not sure if playing around with placement etc might make a big enough difference but open to all input.

 

Thanks for your time and input folks!
 

I had a similar experience with my La Scalas (which aren’t AL5s). Springsteen, Prince, U2 … all were underwhelming.

I ultimately addressed it by adding two subwoofers and tri-amping the speakers using an active crossover (DSP). Now I’m very pleased with the speakers. But some artists still don’t sound as good as I think they ought to. And others sound better than they ever did.

[Help with the identification of my recent purchase]

10 hours ago, Kevin Sparks said:

Thank you so much.  Would these be considered a Heresy I model?

 

Yes. The answer is in the post I linked.

[Letter from PWK on Autoformers part 2 of 2]

.

[Help with the identification of my recent purchase]

The information you are looking for is pinned to this forum.

• Heresy speaker
• Walnut veneer, oiled finish
• Built in 1981 

[Vintage La Scala vs Heresy IV]

The Heresy IV is a fine speaker but you’ll miss the La Scalas. 

I have a pair of La Scalas and a pair of Heresy speakers. The La Scalas have ruined me for other (smaller) speakers. I know I’ll have to move the LS along at some time in the future; that’ll be a sad day.

[Room treatment advice]

Wish I had some really insightful suggestions, but I don't. Whenever I've approached a firm about room treatments they've simply tried to sell me as much soft panels and traps as will fit, and as thick as I could manage. There's been no real insight from any of the (just two) firms I dealt with.

 

My 2 cents worth:

- certainly get rid of the mirror

- add curtains to the windows, ideally floor to ceiling and the heavier the better

- cover the hard surfaces (the sidetable tops) that the speakers are on, even with a bit of fabric 

The open spaces above the walls may be challenging. WAF will likely play a big factor in determining what is acceptable.

 

Good luck.

[Suggested Capacitor for K77 protection when using active XO?]

When I moved to an active crossover and tri-amped my La Scalas I was concerned that an amplifier might malfunction and send DC to the drivers. To  prevent the tweeters and squawkers from being damaged if that were to happen, I added a 13 uF capacitor (Fc = 1500 Hz) to the positive line of the tweeter, and a 100 uF capacitor (Fc = 100 Hz) to the positive line of the squawker.

I sized the caps to have an Fc 2 octaves below the crossover points that I planned to use (400 Hz and 6000 Hz).

[Long run speaker cable]

I’m not familiar with QED79 cable.

 

14 gauge copper wire has a resistance of approximately 2.525 ohms per 1000’ (305m). 12 AWG would be about 1.6 ohms over 1000’.

If it’s copper, your 8m of 14 gauge cable will contribute an additional 1/15 (0.066) ohm of resistance. That is insignificant.

[Klipsch Heresy Series I Manual & Data Sheet]

5 hours ago, M_Klipsches said:

As others have noted H1.5 isn’t a Klipsch designation, but it is the bridge between H1s & HIIs, with old style plywood cabinets but different Xover (E2) and I think, different mid & woofer. Made from 83-‘85(?) To my ear they sound better than my other pair of 1980 HIs. 

 

Today I learned that my Heresy Is are actually Heresy 1.5s.

I put together this table to distinguish between the Heresy I, Heresy 1.5, and Heresy II:

	Heresy I	Heresy 1.5	Heresy II
Cabinet construction	Baltic Birch	Baltic Birch	MDF
Rear panel	Removable back panel	Removable back panel	Fixed back panel
Driver mounting	Drivers are mounted on the rear of the mortarboard	Drivers are mounted on the rear of the mortarboard	Drivers are mounted in rabbets on the front of the mortarboard
Network type	E (or C for early models)	E-2	E-2
Network mounting	on board	on board	on PCB on terminal cup
Tweeter	K-77/cast zinc lens	K-77/cast zinc lens	K-76/plastic lens
Mid-range	K-55/700	K-55/700 or K53/701	K-53/701
Woofer	K-22	K-22 or K-24	K-24

 

 

[Type AA Crossover Part Sourcing]

I’m also in Canada (just outside Toronto).

+1 on everything @geoff. said.

I tried 5 different networks from Klipsch, Cr*tes, and (user-built) ALK with my La Scalas. I wasn’t entirely satisfied with any of them. I ended up using a MiniDSP Flex Eight DSP and tri-amping my speakers (with inexpensive Aiyima A07 amps). Given the cost of new networks (and even replacement capacitors), going active is not much of a premium.

Although it takes some work to configure the DSP, the results are outstanding. I’ll never go back to passive networks.

Even Klipsch is moving to active networks with the latest Heritage iterations.

[Type AA Crossover Part Sourcing]

2 hours ago, Jdiesel87 said:

I did see those but they are local pickup only. I'm located in Canada too which limits my options a bit further too.

 

Where in Canada?

[Yamaha R-N 803 and A-S2200 Left Heat-Sink]

3 hours ago, GuyIsDamGood said:

I have the Yamaha R-N 803 and A-S2200. I recognized that both amplifiers will get warm on the Left Heat-Sink. (around 90 - 105°)

Does anyone have that same warm left heat-sink situation with their Yamaha amplifiers or other brand amplifier(s)?

I have an R-N803. I hadn’t noticed one side getting hotter than the other. 

[Get a load of this...Ojas Collab]

5 hours ago, Travis In Austin said:

You are like the rest of us dinosaurs. (I had the advantage of getting up to speed on him when I heard this might be a possibility a few years ago, and then more recently leading up to this announcement is the only reason I found a lot of what is below). 

 

Devon is part artist, visionary, and engineer, I'm not sure I have seen anything like it. Devon Turnbull, like a lot of DIY hobbyist folks, spent years and years messing around with speakers, modifying them, changing them, and experimenting, along with tube amplifiers and other things related to audio. It's a passion of his apparently. The major difference between Devon and even the most advanced  DIY speaker builder is he builds and sells his speakers.

Yeah, a real Leonardo. Sheesh!

[The story of a new Underground Jubilee owner]

Following with interest.

[Heresy I E-2 Crossover Capacitor Upgrade Recommendations]

I’d suggest taking this discussion to the “Klipsch Korner” on Audiokarma. You’ll find several ideas there.

 

This forum discourages/prohibits discussion of modifications. 

[Heresy I E-2 Crossover Capacitor Upgrade Recommendations]

26 minutes ago, Jack Robertson said:

Have type E2 cross-overs and looking for upgrade suggestions on original hereseys, with Crites woofers. The transformer and inductor show lots of corrosion but not sure that is an issue?

 

living near st Catherine’s Ontario.

Can you post a photo showing the corrosion?

Also, what are you wanting an upgrade to provide?

[Worth getting these La Scalas?]

3 hours ago, John kal said:

You placed a new veneer on them? 

Yes.

I repaired the damage to the cabinets with wood filler and bonds, then laminated 3/8” baltic birch to the top, bottom, and sides. I then applied a ribbon Sapele veneer and used Rubio Monocoat “Pure” as the finish.

[Worth getting these La Scalas?]

2 hours ago, John kal said:

I know what you mean. They're not pulling me for some reason. Is it because of the exterior of one? I'll have to think about the complications if any would come about. Do you still have them after your repairs?

Yes, I still have them. They bring me pleasure every time I listen. 

Here’s a before photo and an after photo.

[Worth getting these La Scalas?]

Run and buy them. They’re a steal.

I paid CAD $2800 nearly 3 years ago for a pair. I repaired and refinished the cabinets myself, which was an enjoyable project.