Philips active speakers

[walsn]

Hello,
A few days ago i get a pair of DUX 6541 motional feedback loudspeaker
I paid US 150 for them. I found some information about them mostly in dutch
or german. These are 2 ways sistems powerwed by a built in 30 watts amp.
with a passive crossover at 1400 Hz.The servo control works with a piezo
accelerometer near the voice coil. Dux is Philips( for sell in Scandinavia I
think). They were sold in the late 70·s and I think they entered the US
market as Philips or Aristona. Where i bought them I listened them fed by
a KT 8300 Kenwood (sadly not for sale) and the impresion was good for me.
Later I didn t made a serious listen sesion yet. ¿Does anybody know these
speakers?, and if so ¿what is your opinion? Finally if anybody have the specs.
reviews or some technical information I would apreciatte it.
Thanks

walsn

 

[gonzo]

I have a pair of SMT-90 Yamaha's,very limited information,dynamic servo drive elements .They sound incredible.are very thin and weigh a ton.I will not part with them and will continue to seek the truth about these units.These were an 80's model and and export item.The bottom line is they are incredible!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[Brian]

Sounds like the Philips AH541 (in the US). Here are the specs:
Continious Bandwidth (measured pursuamnt to FTC rule on power output claims for amplifiers) 30 watts
Bandwidth: 45hz - 20khz
THD: 0.4%
Load: 4 ohms
Frequency Range: 35hz-20khz
Crossover Frequency: 1400hz
Input Sensitivities: 1v @ 10k ohm
7.5v@1k ohm
19v @ 100 ohm
Woofer: 6" (153mm)
Tweeter: 1" (25mm) dome
Dimensions: 9" x 11.5" x 7"

The unit was theBOTL with the higher models being: (in ascending order)
RH544
RH567
RH545
Production was in late '70s and early '80s.

Source: Philips catalog produced somewhere between 1977 and 1981.

Hope this helps. I've heard a couple of these and though a sales failure in the US, they were very very good speakers. A prime example of what happens when the amps and speakers systems are designed as a unit. Excellent synergy. I have the 4506 reel to reel that has the preamp built-in that was designed for use with the speakers. There was a series of components mainly marketed in Europe designed or at least labeled for them including a preamp.

There are a couple of sites on the web that has extensive discussion about them and 1 has an English version up. Or at least there was. I ran across them in searching for the Laboratory Series components.

 

[mhardy6647]

They were a good idea and used excellent drivers. I remember hearing a pair once, but don't really remember what they sounded like.

Everything I "know" about them can be found here:
http://audiokarma.org/forums/showthread.php?t=55218&page=1&pp=15&highlight=philips

Sorry these are sideways: