Looking for info regarding Kenwood KL-777 DX speakers

Looking for info regarding Kenwood KL-777 DX speakers

Postby Reed » Thu Mar 17, 2011 5:08 pm

Hello. First time poster, vintage audio neophyte here. Tomorrow i will be picking up a pair of Kenwood KL-777 DX speakers. I am interested in any information anyone can give me about these speakers. I haven't found anything online about 777 DX speakers, and the reviews I have found for 777 and 777 D speakers don't rate them highly. However, I have also read that the 777 Ds are better than the 777s, so can I assume that the 777 DX is a further improvement?

I hope to run these from the Sansui QRX-6001 receiver I will be getting next week. I will also be adding a pair of Realistic Optimus 6 speakers to the system. Low-end stuff, I know, but I am using what I can afford and find.

Any comments or info will be appreciated.
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Axel » Thu Mar 17, 2011 9:57 pm

Welcome Reed !

The 777DX seems like an early 1980s version of the 1970s 777 and 777D (and 7090 etc) : still made to push sound wide and loud !
The improvement the chronology implies probably means they can push just as loud but cleaner I (would) guess.

I have no experience with any of them, though, but all were export-only items, and mainly USA at that.
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Reed » Thu Mar 17, 2011 10:01 pm

Thanks. I figure that for $5 U.S. I can't go wrong. If nothing else, I will have purchased some new speakers for my garage.
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Reed » Fri Mar 18, 2011 6:26 pm

Picked them up today. A little dusty, but otherwise appear to be in perfect shape. I need to clean them up and see how they sound, but here are some pictures:

Image

Image
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Axel » Fri Mar 18, 2011 6:29 pm

I had forgotten about the 60s-ish grille maintained for this 1980s version :)

Good or bad, these will rock da foundations for sure - and you !
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Reed » Fri Mar 18, 2011 6:52 pm

Thanks. I'm still new to the hobby of putting together component stereo systems, but I have a question. These speakers are rated at 250W max and 125W continuous. Is that good or bad?

I plan on driving them with a Sansui QRX-6001 which has an output rating of 25 watts per channel (it will be running in synthesized quadraphonic mode most of the time). Do I need a more powerful amp to drive these speakers or will the 25 watts per channel be sufficient? I don't intend to crank these to 11. They most likely will never be turned up beyond a speaking volume. The other two speakers will be Realistic Optimus 6 speakers with minimum power ratings of 12 watts. Will these two pairs of speakers be grossly mismatched? Both are 8 ohm if that makes a difference.

Thanks for helping a neophyte.
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Axel » Fri Mar 18, 2011 7:03 pm

Reed,

The KL-777 and KL-7090 had a 102 and 101dB sensitivity ; the KL-777D a 98dB sensitivity - I don't see why the 777DX would differ too much from that.
If 777DX's sensitivity is equivalent to that, ie. equal or above 94dB, even a 2x 5W amp would make you deaf in two minutes !

I don't know the Optimus, but the 777DXs being so easy to drive should help a lot your little Sansui driving both pairs all-together-now with no problems whatsoever and enough power reserve to turn your mansion into New York's Xenon club in 1978 !
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Axel » Fri Mar 18, 2011 7:20 pm

I can't find the 777DX in my european literature but the KL-999Z, KL-666Z and KL-555Z (probably EU names) ; the 777DX fits visibly between the 999 and 666.

In june 1981, the 999Z is specified at 98dB, the 666Z at 95dB and the 555Z at 95dB. From this I guess the 777DX should reach between 98dB and 96dB.
Power-output-wise... 1978 Xenon indeed :)
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Reed » Fri Mar 18, 2011 8:12 pm

Image Image

Thanks. Of course, I don't know if the neighbors would appreciate me cranking Mrs. Miller.
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Re: Looking for info regarding Kenwood KL-777 DX speakers

Postby Zaidstone » Mon Mar 28, 2011 10:58 pm

Hi Reed!

Any listening impressions to offer yet?

I have not heard the Kenwoods but have owned several similar (70's) models from Sansui. I found that despite the big woofers they sound surprisingly bass-light unless placed very close to the rear wall.

Sansui was the Japanese importer for JBL drivers at the time and produced (expensive) loudspeakers using the JBL woofers and full-range models (you often see these for sale at pretty stiff prices on Japanese sites like HiFiDo). I understand that the 'all Japanese driver' versions were supposed to be a more affordable option and were especially popular with members of the US military who could get them at great prices. I think the first Kenwood models shipped around the same time - possibly to grab some of the same market.

As Axel has already said these speakers will go frighteningly loud on quite modest power. They tend to be very 'bright' with lots of treble energy - a real 'Marmite' loudspeaker if ever there was one, you either love 'em or hate 'em. While not hifi in the traditional sense they are fantastic fun and ideal for Rock. :lol:
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