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Apogee Duetta II Signature Crossover Caps Recommendations

Hi All,

I’m getting my speakers completely refreshed by Bill Thalmann @ Music Technology with Graz KLM7 MRTW ribbons, Type 42 bass ribbons, mid/high ribbon wiring kit. I’m also considering have the original Sprague crossover capacitors replaced with either Auracap XOs or Multicap PPMFX capacitors. I’m looking to keep my cost in the realm of these caps. I’m wondering if anyone has direct experience, preferably with my model speaker, recapping and what you recommend? I’m open to mixing as well, but would need to understand the “why”. Thanks in advance!
parker65310
richmos
124 posts
 
Parker65310...thank you very much for the detailed information. At least now I have a good idea what to expect should I choose a rebuild.

Richard
parker65310 OP
212 posts
 
You’re welcome. Feel free to message me privately if preferred. Same goes to anyone else looking for specific info that may not be appropriate for a public forum. No need to track it all down yourself when I’ve already done countless hours of my own research and amassed various top quality sources and articles.
bridge-player
1 posts
 
@parker65310: thanks for the great info. Does the parts cost of $2500 include the bass panels?

How do you like the refreshed Duetta Signatures? I have owned the Duetta Sigs for over 30 years. Fortunately they don't have the dreaded bass buzz, but I may upgrade them.
erik_squires
16,116 posts
 
Make sure you take into account the equivalent series resistance (ESR) of the original caps. With any speaker but with low impedance speakers especially, changing this without appropriately compensation could be a very big deal.


parker65310 OP
212 posts
 
Hi @bridge-player,

The $2,500 does cover the bass panel parts as well. There is a price list on Graz’ Apogee website (https://www.apogeeacoustics.com/repairsapogeeribbons.html), but you’ll want to get a quote from him because the front mesh will need to be replaced (not listed in the price list, around $75 for each speaker as I recall - I elected to get the darker than original mesh). Note, he’ll only send the bass ribbons directly to an authorized restorer (Music Technology Group or True Sound Works in the U.S) since most of the time DIY owners run into installation problems that likely ruin the parts.
They haven’t been restored/upgraded yet. Bill Thalmann @ Music Technology has a large backlog of Apogee restoration plus the (auto) paint shop he uses to do the work isn’t heated. I just spoke to him last week and it’s looking like he can’t get to mine until the end of summer (I’ll send them to him just before he can start work). Good news is they just finished their new shop. So, he’ll be able to work on multiple Apogee pairs at once. He might be able to get to my speakers (and yours potentially) faster as a result, but he’s not sure right now until he gets his bearings with the new space.
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