I’m fixing up some recently acquired GNP Valkerie speakers.
The tweeter and upper midranges were replaced with some Chinese made peerless 4ohm drivers.
I did as much research as possible, found that an upgraded version of the upper mid was still sold by scan speak .
Great!
From all I read, it sounds like the original 1” tweeter was a scanspeak.
However, all the 1” scan speak tweeters of the day ( late 70’s/early 80’s) had a recommended operating range of 3k-20k. GNP says the tweeter is crossed at 2500hz. The capacitor to the tweeter is 10mf which would give a crossover of 2650, not 2500hz.
I have two SEAS h174 tweeters that sound good in them and when I ran the audessey program through them , from 2500hz up, it’s pretty flat up to 20khz.
Is there anything wrong with operating slightly below operating range ( blow a tweeter??
The tweeter and upper midranges were replaced with some Chinese made peerless 4ohm drivers.
I did as much research as possible, found that an upgraded version of the upper mid was still sold by scan speak .
Great!
From all I read, it sounds like the original 1” tweeter was a scanspeak.
However, all the 1” scan speak tweeters of the day ( late 70’s/early 80’s) had a recommended operating range of 3k-20k. GNP says the tweeter is crossed at 2500hz. The capacitor to the tweeter is 10mf which would give a crossover of 2650, not 2500hz.
I have two SEAS h174 tweeters that sound good in them and when I ran the audessey program through them , from 2500hz up, it’s pretty flat up to 20khz.
Is there anything wrong with operating slightly below operating range ( blow a tweeter??
I read that the GNP Valkyrie has crossover points of 125, 700 and 2,500 Hz, but I can't locate a schematic.
If it's just a difference in crossover frequency of 150 Hz that concerns you, then consider that this equates to a small percentage difference of only 5 to 6%.
Hope this gives your thread a nudge!
If it's just a difference in crossover frequency of 150 Hz that concerns you, then consider that this equates to a small percentage difference of only 5 to 6%.
Hope this gives your thread a nudge!
And a humble cap gives you a "slow" turnover frequency point anyway.
beyond "recommended" values (which of course are fine, manufacturer knows), I would worry about any strong resonance peak relatively close , say a 1200 Hz peak or something.
You seem to think "linear" (as in finding 150Hz vs 350Hz difference important), better think in "octaves" which is more realistic, the peak I mention would be one octave below crossover frequency, so actually quite close.
beyond "recommended" values (which of course are fine, manufacturer knows), I would worry about any strong resonance peak relatively close , say a 1200 Hz peak or something.
You seem to think "linear" (as in finding 150Hz vs 350Hz difference important), better think in "octaves" which is more realistic, the peak I mention would be one octave below crossover frequency, so actually quite close.