Yamaha NS-8390 crossover frequencies - strange?

ray_moth · 19th November 2005, 08:38 AM

Hi everyone,

I bought a pair of floor-standing 3-way Yamaha NS-8390 speakers. I'm using them with my home-made tube amp (triode-strapped EL34 PP), which seems to have enough power to drive them.

These speakers are a bass-reflex design. They have a specified impedance of 8 ohms and sensitivity of 89dB. The three drivers are an 8 inch woofer, a 4 inch midrange and a 7/8 inch balanced-dome tweeter. They were not expensive but they seem well-made and they sound pretty good to me, especially the bass.

I was wondering, though, about the crossover frequencies, which are specified as 4kHz and 10kHz. These frequencies seem unusually high to me. Any comments?

Volenti · 19th November 2005, 01:51 PM

They make sense if they are 6db/oct slopes, which I would assume they are.

pupupuchi28 · 10th April 2012, 12:31 PM

Hi, I have these and want to know if different db/oct slopes have any impact on the sonic quality. What is the use of different slopes.

19th November 2005, 08:38 AM	#1
ray_moth diyAudio Moderator Emeritus Join Date: Jan 2004 Location: Jakarta	Yamaha NS-8390 crossover frequencies - strange? Hi everyone, I bought a pair of floor-standing 3-way Yamaha NS-8390 speakers. I'm using them with my home-made tube amp (triode-strapped EL34 PP), which seems to have enough power to drive them. These speakers are a bass-reflex design. They have a specified impedance of 8 ohms and sensitivity of 89dB. The three drivers are an 8 inch woofer, a 4 inch midrange and a 7/8 inch balanced-dome tweeter. They were not expensive but they seem well-made and they sound pretty good to me, especially the bass. I was wondering, though, about the crossover frequencies, which are specified as 4kHz and 10kHz. These frequencies seem unusually high to me. Any comments?

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19th November 2005, 01:51 PM	#2
Volenti diyAudio Member Join Date: Aug 2003 Location: Australia	They make sense if they are 6db/oct slopes, which I would assume they are.

10th April 2012, 12:31 PM	#3
pupupuchi28 diyAudio Member Join Date: Mar 2012	Hi, I have these and want to know if different db/oct slopes have any impact on the sonic quality. What is the use of different slopes.

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