Hello!! Sadly I could not do this before the work, as I was waiting on some equipment.
But, this is REW going through optical out, to my Denon AVR. Left and right are unhooked. Sub off. This is taken in location. Most would say my location sucks. Sadly I have some shelves that stick out below me. I have it adjusted up and aimed to me. I sit about 10-13 feet back. Mic location was 3 ft. Set at tweeter. I was asked to take this measurement by another member to compare. I need to get longer cables as wel so I can sit the laptop back further away. I’m limited by 6 ft. So keeping it off to one side far away as possible.
No EQ done! All DSP turned off.
I have all settings off in my AVR. Honestly, from what I see people running on these online before to now... I’m happy! I don’t quite have 100 hours on this. Where as my 600’s I think I’m close. I’m going to measure those next.
Another observation.. I see a ton of people trying to get flat lines, or house curve lines. My biggest thought is... Well if your starting off with something broken already, these EQ’s and DSPs can only do so so much, and will have to work there ass off to get a flat line. And if you, out of the box have a shit ton of nulls, and peaks..Only thing it can do is try and bring down the volume to get rid of them, jacking frequency, Thus fighting everything. Room treatments then go on full tilt, people just go insane and buy every thing they can to make it happen. A nice smooth curve.
The smoother your speakers response, the better your EQ and DSPs will be able to make your response curve smooth without hindering volume and quality.
This first hand shows how Danny’s modification can really work for you! Where the rest are buy everything under the sun and all gimmicks.. (the real snake oil to good sound I feel..) Danny has started at the right spot. Sadly some of us that have Klipsch, and SVS what have you.. don’t have his built speakers. Which is ok.. this process will get you much closer then anyone else. Why spend 1000’s in DSP software, just build your speakers or rebuild upgrade your speakers and have a much better starting point. Now your at some afternoons and some elbow grease, rather then empty pockets!
It feels good not fighting factory flaws! Honestly! My ears could not be happier!! With so much pointing fingers of what you should and should not do... I’m not going to point any at all. I’ll tell you my experience.
When I first got these speakers, I thought.. yes! Back to audio. Back to good sound! (Had a sound bar before.. I know.. I know). I set everything up, speakers, subs, new AVR, setting up room correction and such.. I was happy... I guess. It was new, and upgraded sound, but I felt.. something is not right. So I waited! I trusted a “friend” who owned a shop, yea these a great! So I did not want to return them. I waited some more in hopes they would break in more. Nope.. Time later I started my Google searching. Improve Klipsch RP600, 504C sound. Guess where it brought me? Some time and videos later, I made a quick choice to purchase the products. The paper work he has showing the results were more then enough for me. As well being in electronics for a long time and I’m a nerd folks.. I love this shit.. lol. But really driven by wanting the best of everything, be competitive... What cooler thing to do! Lol
I did visit GR but that’s a whole different story.. I highly advise you to visit Danny and the men.
So, jumping fast forward.. parts installed and some short time later.. I don’t need the graph to show me, allow me to hear the difference.
The sound! I have a sound stage! It’s great!! My vocals are so different! People don’t sound like they have a blanket over there mouth! Before the upgrade I could always close my eyes and know exactly where things are. That speaker there!! Well, this has become a bit harder to do now. I like that! I want my sound coming from everyplace but directly from my speaker. Sounds goofy right? I want my sound to come the people that I imagine are standing in front of me, putting on this show.. (watching TV) or when music is playing, I want to hear the drummer in the back, and Lead guitar come from stage right. I did not have any of this before the upgrade.
Now I have a concert, a show just for me each time I play music, or watch a movie. Sometimes I swore my center was on in 2ch mode. Some head turns..
This brought my music and my movies back to life! I can hear in color, and see in sound!
The bass response is much tighter, and responsive. Not as muddy.. the 600’s have so much lower end.. it’s ridiculous! It makes me smile like a kid in a candy store. Love bass! Love response. I love that my 504 sounds more not there. But there.
The highs are not so... beating my eyeballs through my ears. Can it get bright still.. yea.. I feel this is design with the tweeter. Maybe if that cup was 8 inches deeper it would help! Opening the area up a bit. Or opening the top and mounting it backwards.. (thoughts) again.. It can still be bright. So, I can install the grills and that will also help that a bit too. Again, my ears are pleasantly surprised at how he could take this tough tweeter and smooth it out! Making it a natural baby, rather a fricken T-Rex angry and mean!
Not as good as his speakers, or the open baffles.. But man has this added some life, pizzazz, and some style to these, very much needing love set of speakers.
The 504 has just brought on this level that I was hoping for. Each day they keep impressing as they break in.
So folks.. all you who doubt and more.. you can’t doubt facts. The theory behind what’s going on. We want sound reproduced just as it was done live in front of us. Only way your going to really get to that point is starting off with a good set of speakers! Something that will be able to reproduce sound as intended, out of the box.. with little to no EQ! Being nothing is perfect, the DSP and EQ then can be used to help room mode and get them back to where they need to be.. Or where they already play at! Worst case, you add room treatments.. but again those won’t help a speaker that can’t make the note in the first place.
This should be proof enough. Lol it’s good shit!

Also, make sure those settings are right.

This is more of a positive rant, then a review. But a short review is mixed in I guess.
The perma-smile I have.. I’m thankful for! Thanks Danny and the guys