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Ar2ax parts list


DevilDawg
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I posted a few months ago help with restoring my AR2s spent a lot of time on the cabinets they were in really nice shape but I sanded them down and refinish to furniture grade,even sanded down and stained the front with a black ebony polyurethane stain 

now for the parts...need new pots tweets caps  see prices all over the board diff tweeter choices some with voice coil others without diff pots cheap caps or a kit bundled together 

what’s the consensus on the right parts and supplier for what I’m looking for 

thanks 

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Lots of choices here. Lets start with the caps first. I have three sets of 2ax's that I have restored and kept. 

Set 1.    Two of these parallel wired together for the 6uf cap.

               https://www.parts-express.com/dayton-audio-pmpc-30-30uf-250v-precision-audio-capacitor--027-220

               This for the 4uf cap.

               https://www.parts-express.com/dayton-audio-pmpc-40-40uf-250v-precision-audio-capacitor--027-226

               About 25 dollars plus shipping

Set 2.     One of these for the 6uf cap.

                https://www.erseaudio.com/Products/PulseX250v/MPX25-03-6-00

                And two of these wired together for the 4uf.cap

                https://www.erseaudio.com/Products/PulseX250v/MPX25-03-2-00

                About 7.5 dollars plus shipping.

Set 3.     This is my crazy stupid set of 2ax's

                These wired in parallel for the 6uf.

                 https://www.madisoundspeakerstore.com/supreme-caps/mundorf-2.7-mfd-supreme-caps/

                 https://www.madisoundspeakerstore.com/supreme-caps/mundorf-3.3-mfd-supreme-caps/

                And these wired in parallel for the 4uf.cap

                 https://www.madisoundspeakerstore.com/supreme-caps/mundorf-3.3-mfd-supreme-caps/

                 https://www.madisoundspeakerstore.com/supreme-caps/mundorf-2.2-mfd-supreme-caps/

                 About 200 dollars plus shipping

 

                They all sound good. The possibilities are plentiful. You could even use electrolytic caps like the originals were, although I prefer  polys here.

 

                 My opinion on the pots. Don't try to clean the originals. I would go with these  L-pads.

                 https://www.parts-express.com/speaker-l-pad-attenuator-15w-mono-3-8-shaft-8-ohm--260-248

                 or get these from the eBay seller hifiaudio .

                 https://www.ebay.com/itm/ACOUSTIC-RESEARCH-SPEAKERS-control-potentiometer-AR-2AX-AR-3-AR-4-AR-5-AR-6/164155405428?              hash=item26386cb474:g:85QAAOSw5WReIgWE

                  They both do about the same thing.  Big difference in price.

                  I have one set with cleaned original pots, one set with l pads and my crazy stupid set with the replacement pots from hifiaudio. 

 

                 The tweeters area toss up.  If your originals are rebuildable I suggest you send them to Roy C  or Chris1 and have them rebuilt.  This would sound the best.

                 The HiVi Q1R are a good choice, You will need the small inductor coil and possibly a cap value change, but this will work.

                 https://www.parts-express.com/hivi-q1r-1-1-8-textile-dome-tweeter--297-417

                 The third option is the Midwest speaker  replacements. I have no experience with these, but others speak favorably about them.

                  https://www.ebay.com/itm/AR-Acoustic-Research-Replacement-8-ohm-Tweeter-for-AR-2ax-AR5-LST-2-MT-4121-8/162689351715?hash=item25e10a8023:g:k~kAAOSwc8lZzEo4

                 These are just my opinions and opinions are much like elbows. Most people have at least one. 

                 Oh you did not mention the grills.  There is really only one option and that is the 18 count lambs wool linen from 123 stitch. It looks and preforms so much

                 like the original it is uncanny. 

                https://www.123stitch.com/item/Wichelt-18-Ct-Lambswool-Linen-Needlework-Fabric-27x36/59-135X

               

 

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Hey 

that’s a really detailed list I really appreciate this 

I’m going to send the tweets off for repair but pick up some replacements for now I’m itching to get these into my system plus they turned out so nice they will match the decor  wife approved! Built some nice little stands out of angle iron and butcher block 

I’ll post picks results when they are put together 

thanks again 

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  • 2 months later...

I too have some AR2ax in the process of refurb.  I have ordered the HiVi Qr1s from Parts Express, but have not been able to accurately identify " .05mh parallel inductor ".  When I searched for that on Parts Express I got three choices, not sure if any are correct.  Can someone provide a specific source and part number please?

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39 minutes ago, jackrock said:

I too have some AR2ax in the process of refurb.  I have ordered the HiVi Qr1s from Parts Express, but have not been able to accurately identify " .05mh parallel inductor ".  When I searched for that on Parts Express I got three choices, not sure if any are correct.  Can someone provide a specific source and part number please?

https://www.parts-express.com/Dayton-Audio-LW18-05-0.05mH-18-AWG-Perfect-Layer-Inductor-257-798

https://www.parts-express.com/Jantzen-1947-0.05mH-18-AWG-Air-Core-Inductor-255-200

Either will work ..but the Jantzen#255-200 is on backorder  2/25/2021

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The coil is best mounted to rear of HIVI tweeter and attached across the speaker terminals using some type insulated spacer between coil and tweeter body

you can use piece small cardboard, then hot glue everything to tweeter body NOTE!!! this example shown is setup for front wired tweeter connections where you see wires going through hole drill on tweeter flange to allow connection to front of cabinet... if your AR2ax is rear mounted connection you would NOT drill holes through tweeter flange

See Attached image

259260679_AR-2axQ1R(3).thumb.jpg.988b48269fa6685ee6d20f4806619bb6.jpg

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  • 7 months later...

The 3.9 for a 4.0 is fine.  The 5.6 for a 6 is just outside what I would be comfortable with, but it will likely work as well.  Remember the original caps you are replacing were very likely  +/-10% tolerance caps.  If they were amazingly close, figure they were plus or minus 5% so on a 6.0uF cap gives a range of 5.7 - 6.3uF.  250V rating is more than adequate.  Madisound carries a 6.0 clarity PX cap and other sites and brands offer a 6.0 as well.  Maybe you have limited options for where you can order?

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On 9/25/2021 at 8:00 AM, Chilo61 said:

BTW, can I use 3.9uF/250V to replace the 4.0uF/250V, and either 5.6uF or 6.8uF/250V to replace the 6.0uF as specificied?  I found some Clarity caps with them.

I agree with Kryten79, and Madisound is an excellent retailer.

If you are using Dayton caps sold by Parts Express, the 6.2uf cap is more appropriate than the 5.6uf cap.

https://www.parts-express.com/Dayton-Audio-DMPC-6.2-6.2uF-250V-Polypropylene-Capacitor-027-427

Roy

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