Much under 2,83V but inductance/motor related h3/h5 level does not change much at higher voltages at mid band (at bass yes), it's not like h2/h4 which are suspension etc. related and rise pretty monotonically rgds. drive voltage.
I watch mainly mid band h3. Shorting rings/low Le mainly affects h3 above the system resonance. Some might watch much more bass performance.
Last edited:
Size and coverage angles definitely make a difference in the listening experience.
If I were to design a synergy (inspired) system, it would probably consist of a big conical waveguide/Arai type of horn mounted inside a large J3-like horn.
The outer horn could be loaded with 18" or 15" woofers and 12" or 10" mids. 2 of the latter may breath through the mid/high horn.
If I were to design a synergy (inspired) system, it would probably consist of a big conical waveguide/Arai type of horn mounted inside a large J3-like horn.
The outer horn could be loaded with 18" or 15" woofers and 12" or 10" mids. 2 of the latter may breath through the mid/high horn.
Attachments
Last edited:
Definitely worth idea to fine tune. I have also played with nested horns on idea level. Colossus could also be said to be a nested design, but the wavequite of the woofers is 180deg😀 And a more brutal force "iron curtain" Sd-solution. Sd-scaling is non-elegant (and costly) but easy and it always works🙂 And the wooden parts' structural integrity is easy to achieve. With big horns similar acoustical deadness of every panel (like a thick and braced cabinet) is (also) a great challenge without them becoming unmovable objects🙂
Valid points!!
Indeed, your Colossus consists of a mid / high horn - for which controlled directivity is most important, nested in a 180° horn wall.
I like the modular design of it, and while not exactly portable, the individual cabs can be moved by 1 person.
A single Danley J3 weighs almost 200kgs. It seems quite complicated to design such a synergy horn in modular fashion.
Indeed, your Colossus consists of a mid / high horn - for which controlled directivity is most important, nested in a 180° horn wall.
I like the modular design of it, and while not exactly portable, the individual cabs can be moved by 1 person.
A single Danley J3 weighs almost 200kgs. It seems quite complicated to design such a synergy horn in modular fashion.
After 1-2 weeks of full transistor signal path I changed it to whole tube setup.
Tube signal path is ultra-purist and consists of Audio Note Kits 5.1 non-oversampling DAC with modded I/V-transformer (Noguchi finemet) and modded SE-tube stage after it (with finemet opt). Pre is TVC (permalloy) + SE-tube tube stage (finemet OPT). The amp is capacitor coupled SRPP stage driving SE-UL amp with KT88 output tube (finemet opt also).
Listen to the differences (Im not saying they can be heard even 30% by recording the sound but still😉):
Transistor: Colossus - Sonique (Full Transistor) - YouTube
Tube: Colossus - Sonique (Full Tube) - YouTube
I think I might need to bi-amp the Colossus to the moon.😀
Tube signal path is ultra-purist and consists of Audio Note Kits 5.1 non-oversampling DAC with modded I/V-transformer (Noguchi finemet) and modded SE-tube stage after it (with finemet opt). Pre is TVC (permalloy) + SE-tube tube stage (finemet OPT). The amp is capacitor coupled SRPP stage driving SE-UL amp with KT88 output tube (finemet opt also).
Listen to the differences (Im not saying they can be heard even 30% by recording the sound but still😉):
Transistor: Colossus - Sonique (Full Transistor) - YouTube
Tube: Colossus - Sonique (Full Tube) - YouTube
I think I might need to bi-amp the Colossus to the moon.😀
Last edited:
Even thought the kick lost the articulation in tube setup, but there is something irritating in transistor video compare to tubes.
Framing the transistor vs tube dilemma in such black-and-white terms is overly simplistic.
Try some Accuphase class A mosfet amps, and then we'll talk ;-)
Marco
Comparing ('framing') tube setups vs transistor setups according to some sort of protocol seems almost impossible.
I don't think it's Legis intention to draw 'valid' conclusions from the posted videos, but merely to demonstrate some differences in the rendering.
BTW, Accuphase - while topnotch - appears not to be the transistor amplifier (brand) to end all transistor amps, as far as measured performance is concerned.
I don't think it's Legis intention to draw 'valid' conclusions from the posted videos, but merely to demonstrate some differences in the rendering.
BTW, Accuphase - while topnotch - appears not to be the transistor amplifier (brand) to end all transistor amps, as far as measured performance is concerned.
Last edited:
I have been eyeing this Shaling amp that uses Sanken semiconductors, might be a good deal: https://www.diyaudio.com/forums/sol...e-sanken-amp-shanling-a3-2-a.html#post6330786
Pretty tube-like measurements also due to low global nfb (I presume).
The suspension of the 12" has gotten less lossy and Qms (in a box) has risen from 6,7 --> 10,3. The suspension also feels more sensitive and springy when pushing a driver.
Just like with the 15" woofer modules the impedance peak is almost as high as with a naked driver because I only line the box with felt and don't stuff it. Doesn't kill the kick.😛
Impedance of a single mid module at start and after ~1week. All four drivers connected (giving 8ohm nominal imp.), which share the same air space. They effectively measure like one single driver (sharp impedance peak), the shared air space evens out their minor differences nicely.
Just like with the 15" woofer modules the impedance peak is almost as high as with a naked driver because I only line the box with felt and don't stuff it. Doesn't kill the kick.😛
Impedance of a single mid module at start and after ~1week. All four drivers connected (giving 8ohm nominal imp.), which share the same air space. They effectively measure like one single driver (sharp impedance peak), the shared air space evens out their minor differences nicely.
Last edited:
The sound of the woofer amp would be dominant in multi amp set up, so choose the amp carefully. 😉
Very nice speakers, congrat!
Very nice speakers, congrat!
That impedance plot looks very good, much better than in the specsheet. It's an indication of low mechanical losses.
Last edited:
I made another "acoustical square wave" vid with a 45-500hz square sweep: Colossus 45-500Hz Square Wave Sweep - YouTube
Mic is next to listening spot, so it's room response squares waves.
Those who use phase aligned lr4 slopes should try the same.😉
Soundcard oscolloscope: Soundcard Scope
Square sweep generator: Free Online Frequency Sweep Generator | OnlineToneGenerator.com
Mic is next to listening spot, so it's room response squares waves.
Those who use phase aligned lr4 slopes should try the same.😉
Soundcard oscolloscope: Soundcard Scope
Square sweep generator: Free Online Frequency Sweep Generator | OnlineToneGenerator.com
Maybe unneccessary, at least in the crossover area, where a LR4 would suffice to improve GD distortion. 😉
Regards
Charles
Regards
Charles
