dhruvmeena96
Headphoneus Supremus
Knowles ED 29689
Circuit:
Series- 3ohm Panasonic resistor + 0.08 ohm Vishay Dale Resistor = 3.08ohms
Parallel- 0.6ohm Vishay Dale resistor + 0.07ohm Vishay Dale Resistor = 0.67ohms
It has to be arranged in L pad attenuation circuit
2mm and 3mm Dia Thicker wall tubing is needed
lenght of tubing 5mm(starting from nozzle of driver)
Damper is 1500ohm(Green) placed 2mm away from driver nozzle.
Starting with 3mm diameter tube with 2mm length, then 2mm diameter tube with 3mm length(damper inside this tube at intersection of 3mm and 2mm diameter tube intersection)
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Knowles ED 30761
This driver is nozzle less
Have to use tweezers
2mm Dia Thicker wall tubing is needed
lenght of tubing 7mm(starting from driver)
Damper is 2200ohm(Red) placed 1.5mm away from driver nozzle.
Perfected Noble Savant. Less brittle treble and lower congestion.
I tried damping the ED29689 with 20 ohm like noble and saw weird treble issues.
The ED29689 needs 16.23dB attenuation which I converted in T-pad and L-pad, and finally went for L-pad as the sound difference was not that great and I was getting better Zo Value out of L-pad(exactly 3ohms from ED)
This setup damped the 2kHz and 3kHz from savant better(2dB) and smoother.
Mid range focus was more than Savant
Soundstage was improved
Treble was smoother in roll off in feel
Bass needs work
Zobel circuit would work but then need inductance value.
I dont know, when I tried RAF with Zobel, it not only dampens the treble, fix high rising impedance but also correct the phase shift in mids by a little and increase bass texture by huge amount.
Series notch filter, correctly implemented makes bass way faster too. I think, that brain is not focusing on peaks make us sensitive to bass plus distortion is lower too
Music used while testing this setup
Starlight Song by Hideyuki Fukasawa
Last Stardust by AiMER
Assassins creed 2, brotherhood and revelations OST
Symphony no.9
Circuit:
Series- 3ohm Panasonic resistor + 0.08 ohm Vishay Dale Resistor = 3.08ohms
Parallel- 0.6ohm Vishay Dale resistor + 0.07ohm Vishay Dale Resistor = 0.67ohms
It has to be arranged in L pad attenuation circuit
2mm and 3mm Dia Thicker wall tubing is needed
lenght of tubing 5mm(starting from nozzle of driver)
Damper is 1500ohm(Green) placed 2mm away from driver nozzle.
Starting with 3mm diameter tube with 2mm length, then 2mm diameter tube with 3mm length(damper inside this tube at intersection of 3mm and 2mm diameter tube intersection)
---------
--------------------
--------------------
---------
Knowles ED 30761
This driver is nozzle less
Have to use tweezers
2mm Dia Thicker wall tubing is needed
lenght of tubing 7mm(starting from driver)
Damper is 2200ohm(Red) placed 1.5mm away from driver nozzle.
Perfected Noble Savant. Less brittle treble and lower congestion.
I tried damping the ED29689 with 20 ohm like noble and saw weird treble issues.
The ED29689 needs 16.23dB attenuation which I converted in T-pad and L-pad, and finally went for L-pad as the sound difference was not that great and I was getting better Zo Value out of L-pad(exactly 3ohms from ED)
This setup damped the 2kHz and 3kHz from savant better(2dB) and smoother.
Mid range focus was more than Savant
Soundstage was improved
Treble was smoother in roll off in feel
Bass needs work
Zobel circuit would work but then need inductance value.
I dont know, when I tried RAF with Zobel, it not only dampens the treble, fix high rising impedance but also correct the phase shift in mids by a little and increase bass texture by huge amount.
Series notch filter, correctly implemented makes bass way faster too. I think, that brain is not focusing on peaks make us sensitive to bass plus distortion is lower too
Music used while testing this setup
Starlight Song by Hideyuki Fukasawa
Last Stardust by AiMER
Assassins creed 2, brotherhood and revelations OST
Symphony no.9
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