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Klipsch KG-4s with Sansui AU-7500

cobascis

cobascis

Active Member
Hello all, this is my first post. I've been a lurker for years and decided to make an account as I’ve been making some advances in my setup lately.


I scored a Sansui AU-7500 recently, which I love the sound of. I’ve been using it with some less than ideal Ohm Model E speakers, which just sound OK. However—I was able to grab a pair of Klipsch KG-4s in great condition, but with blown tweeters for $100 on craigslist. I have a pair of crimes diaphragms on the way and will have them up and running soon.


My question regards the combination of this amp and these speakers—I’ve read of folks blowing the tweeters by clipping lower wattage amps. Though the Sansui is 38WPC, it seems very loud to me and I have no need to turn it up past 10PM or 11PM, even with the inefficient OHM speakers.


I’ll post some pictures in the next few days when I get the Klipsch KG4s up and running.
 
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Klipsch speakers in general are very efficient, including the KG4's. 38wpc should be plenty as long as you aren't trying to blow your house down with sound. The KG4's are more efficient than the speakers you currently have, so you will get more volume with less power from the amp anyways!
 
I bought a pair of KG4s some years back to pair with my Sansui. I was really surprised at how well they complimented my system. I have since moved on to Cornwalls, and eventually Khorns - but I haven't sold any of the Klipsch. I even bought a pair of KG2s for my office.

Enjoy your speakers!:thumbsup:
 
Thanks for the replies! Glad to know it should work out well. Crites are arriving in the mail today... excited to hear the KG4s without blown tweeters!
 
I've run 4.2's on a 38 wpc Sherwood and a Pioneer SX-780 (45 wpc IIRC), plenty of power for most listening and rarely turned it up past 11 am.

You'll love those Crites diaphragms! Consider replacing the two caps in the crossovers, they're gettin' old by this time.
 
Just got the Crites diaphragms installed, took only about 20 minutes. They came with a yellow paper sticket/divider/gasket type thing. I left that on and installed as is as there was no reference to it online?

They sound great! Really pleased. One thing is though, I've had to turn the treble down to either -2 or -4 on my Sansui... the high end was incredibly present. It's possible I'm just not used to the brightness, but it seemed extreme to me.

Another note/question--without the Sansui's Low Filter IN, the woofers were moving an alarming amount on the intro silence to a track. I suppose I didn't notice the turntable rumble when I have Ohm E series speakers because they had essentially no bass response. Any ideas on how to combat the rumble other than this switch? It still sounds good without it but I'd rather not have to use it.

Here's a shot before I but the grills back on. So far I've only tested with rock records... Big Thief's Masterpiece from last year, and the Albini Mix of In Utero. :)
Sansui AU-7500 and Klipsch KG4

Sansui AU-7500 and Klipsch KG4

  • Media owner cobascis
  • Date added
 
Last edited:
toxcrusadr said:
I've run 4.2's on a 38 wpc Sherwood and a Pioneer SX-780 (45 wpc IIRC), plenty of power for most listening and rarely turned it up past 11 am.

You'll love those Crites diaphragms! Consider replacing the two caps in the crossovers, they're gettin' old by this time.
Click to expand...

I've attached a pic of the caps-- I'm handy with a soldering iron, but could someone direct me to some replacement cap/values for these bad boys?
 

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cobascis said:
Just got the Crites diaphragms installed, took only about 20 minutes. They came with a yellow paper sticket/divider/gasket type thing. I left that on and installed as is as there was no reference to it online?

They sound great! Really pleased. One thing is though, I've had to turn the treble down to either -2 or -4 on my Sansui... the high end was incredibly present. It's possible I'm just not used to the brightness, but it seemed extreme to me.

Another note/question--without the Sansui's Low Filter IN, the woofers were moving an alarming amount on the intro silence to a track. I suppose I didn't notice the turntable rumble when I have Ohm E series speakers because they had essentially no bass response. Any ideas on how to combat the rumble other than this switch? It still sounds good without it but I'd rather not have to use it.

Here's a shot before I but the grills back on. So far I've only tested with rock records... Big Thief's Masterpiece from last year, and the Albini Mix of In Utero. :)
Sansui AU-7500 and Klipsch KG4

Sansui AU-7500 and Klipsch KG4

  • Media owner cobascis
  • Date added
Click to expand...

- you can control the treble with toe-in angle; turning the speakers outward a little to focus behind you will reduce treble, hottest is when you are looking directly into the horns and can see the back of the throat
- in the photo your speaker is really close to the turntable; some added distance may reduce potential rumble / feedback
- turntable on the amp looks great but the amp really needs about four inches of clear air above it to ventilate as designed

I have an AU-6500 I really like,... handsome looking series.

Speaking of which, this series has an undocumented but discovered and confirmed (by forum member skippy124) slight bass boost in the phono equalizer above the RIAA curve specification.
160Hz begins a nice smooth rise
80Hz +0.5dB
60Hz +1dB
40Hz +1.7dB
30Hz +2.5dB
20Hz +3.5dB
 
Great--thanks for the info! That makes sense regarding the angling of the speakers. Either I've gotten used to it or the highs have tamed themselves from the initial install--these things sound incredible now. They are incredibly fine looking pieces of equipment.

I'm moving soon so I'll find a better setup re: turntable location to reduce rumble and give the amp some breathing room. Good information to have re: the bass boost as well.
 
Parts Express is a good place to get caps. The 3 uf, 250V one could be replaced with a Dayton metallized polyprop 5% tolerance cap rather cheaply. If you want to get more fancy there are film and foil versions of the Daytons and of course many other brands. The other cap there looks like a nonpolar electrolytic, likely a much higher value but I can't see it. If it's over 20-30 uf a film or metallized film cap will get rather large but PE has a line of nonpolar electrolytics that look very much like yours and are much smaller and cheaper than films for those larger values.
 
I've got a pair of KG 4.2's that are my mains. They've got the Crites crossovers and titanium diagrams in the Horns. I know there are some differences but I only have 20WPC and they get as loud as I'd ever want. I mean I can go from bone shattering bass to smooth jazz real easy with tremendous sound. Klipsch seem to be relatively efficient but I'd always recommend going with the Bob Crites crossovers and titanium diagrams. It will really bring any Klipsch alive.
 
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