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Remove the passive driver and you will be able to access just about everything inside the speaker - I have Forte' 1's and that is how I replaced my crossovers (used ALK's DIY kit - http://community.klipsch.com/forums/p/141614/1442566.aspx#1442566) Regards, Shawn

here is a link to a 18.1 review: http://www.chasehometheater.com/forum/showthread.php?t=5230

The drivers in my sub were produced by Eminence to Chase's spec's

I purchased one of their smaller subs, a CS10.2 Here is my review: My environment is 13’x13’x10’+ (~1720 cu ft) sealed room - carpeted (typical Florida construction – block walls on a concrete slab, built in 2008) I have the following equipment: Denon AVR-2310CI, Klipsch Forte (mains), Academy (center) and KG-3 (surrounds) Preorder: Outstanding customer service, Jack and Craig answered all of my questions and concerns – Craig even called me to discuss my options (how often does the owner of a business call the customer to help?) Jack sent me numerous emails answering my setup questions and providing helpful setup links. Order/Delivery: The web ordering process was straightforward and easy, auto email updates is a nice touch. I ordered my sub on a Friday afternoon, received email shipping confirmation the following Tuesday and received my sub before 10am on that Friday – about a week from order to delivery, during one of the worst winters in a while. Packaging: The sub was packaged extremely well and received in excellent shape. Fit and finish: The sub is constructed solidly and has an industrial type (pro audio style) finish – there are slight imperfections on the top from the amp position move – only noticeable in bright light when you are looking at the top of the unit, up close – I can’t see it from my seating position. Performance: This is the subjective part – I will tell you what I hear is smooth, seamless, separate bass reproduction in music (I can hear every bass note clearly, not muddled together) and chest thumping slam during movies. Movies: (I have only got to watch a few movies so far) When viewing the opening scenes of avatar - I wasn't prepared for the explosion of sound when the shuttle broke though the sound barrier, it startled me and made me jump in my seat- the wife thought the walls were going to fall down. When viewing the opening scenes of Terminator Salvation – my wife had to leave the room, due to the intensity of the heartbeat – her words were – “this is freaking me out”, the explosion of LFE sound during initial attack on skynet was amazing – you not only heard the explosions you felt them as well – the whole movie has a intense LFE track and will test out your sub pretty well, the 10.2 did a fantastic job. I watched “The Losers” last night, man you can really “feel” the concussion of explosions with this sub. Music: we listened to ACDC – war machine; Eagles – disco strangler; Creed – higher, one; 1812 overture with canons (DDD); Fleetwood Mac - Rumors; Dire Straits – Brothers in Arms; Steve Winwood – Back in the High Life; Golden Earring – Twilight Zone (very good bass track) My wife and I listen to the above listed tracks/CDs – first without the sub and then with the sub. My wife couldn’t believe the “depth” added to the songs with the sub on. The clarity of bass reproduction of this sub is outstanding. The bass is tight and very impactful. Here are the sub measurements using the Real Traps Test Tone CD and a Radio Shack Digital SPL meter (model #33-2055) – corrected SPL set to 70 at primary listening position using Track-30 (pink noise) with the crossover set @ 80Hz Summary: If you are looking for a beautiful looking sub to impress your friends - this is probably not the sub for you. But - if you want clean, articulate musical bass reproduction and knock your socks off, slam you in the chest, ear bursting LFE for movies - then look no further. Thanks to Craig and the CHT staff, for providing an outstanding product for an excellent price.

http://www.jlaudio.com/header/News/Press+Releases/JL+Audio+E-Sub+Powered+Home+Subwoofers%3A+Precision+Built+in+the+U.S.A./885899

Coytee, Lots of good related info here http://www.epanorama.net/documents/groundloop/index.html http://www.jensen-transformers.com/an/ts_guide.pdf Regards, Shawn

I recently update the crossovers in my Fortes (I) using the ALK DIY kit and BC autotransformer, really brought the speakers back to life. Money well spent IMHO. See thread: http://community.klipsch.com/forums/t/141614.aspx Regards, Shawn

I have a similar setup : Forte - fronts , Academy - center and KG-3's as surround in 13x13x10+ (~1720) sealed room. The KG-3's sound great as surrounds and have a small foot print I have them on 26" stands. Shawn

JMON, I was stationed aboard USS Bainbridge (CGN-25, razor blades now) we were in port for about a week. Shawn

I am sitting here listening to the POLICE "Ghost in the Machine" and again I just have to reiterate how amazing my Fortes sound after this modification - I would like to thank Al again for providing an affordable solution to restoring the Forte's back to their amazing sound reproduction.

I have a pair of KG3's I bought in 1992, I currently use them as surrounds with my Fortes for mains in my HT - but previously they were in my formal living room (10' x 14') and they sounded great - plenty of low end with the 8" woofer and 10" passive. I had them toed in slightly and on 8" speaker stands with a slight upward angle.

Robert, To get the timbre match needed for the front three - I would think that any of the KG series would be the way to go. Shawn

Photo with input cup and foam in place

Al, I will remove the passive and try to take a photo to show the finished job - with the cup in place and the foam installed. I had read your thread on the development of the network and it is what helped me decide to purchase your kit - I thought the thoroughness of your design and measurements were outstanding. Thanks again. Shawn

Al, The crossover is not mounted exactly centered on the partition - it is offset to the right a little, I did reused the input cup - there was plenty of clearance between the crossover and rear of the input cup, one thing I didn't show in the photo's was that I restapled the foam piece over the crossover. I was only able to use three of the mounting screw locations drilled in the crossover board - it is very secure. Thank you again for your work and providing an affordable upgrade option.

input cup view

new crossover mounted in speaker

original crossover

So after reading many forum postings, I decided to update the crossovers in my Fortes' (I bought them new in 1988). I purchased the DIY kit from Al Klappenberger (~$163 shipped) and a pair of new autotransformers from Bob Crites (~$72 shipped). I was able to build and install the crossovers in one day, after building the crossovers, I updated only one speaker at first, so that I could do comparisons. I noted the following after the new crossover installation. The low end seems to have a more punch/depth, the highs are clearer/crisper, but the mids are where I detected the most improvement (unbelievable clarity). I find myself listening to my music library whenever I can now - whereas before I mostly only used the system for HT and listened to music in my truck. I would definitely recommend to any Forte' owners to update the crossovers.

Here is the other one

For some reason my photo didn't post Figured it out with help from forum postings - here is close up of one

I purchased my WO Forte' on 11/05/1988 at Naval Air Station Sigonella for $649.99. They are now part of my HT system (12 x12 semi octagon room) Forte' Main Academy Center KG3 Surrounds Sony 50" DLP Denon AVR-2310CI RW-10

Here is a good info site for Denon AVR's - helped me with setting up my 2310 http://batpigworld.com/setup.html

Here is a link to the owners manual - it may help. http://www2.yamaha.co.jp/manual/pdf/pa/english/amp/P2250E.pdf Regards, Shawn

My windows are behind the TV - room lay out - bought nice heavy drapes/curtains to block out the light.