i want to cross to supertweeter at 7-10 khz, the supertweeter would be a line array of
https://www.parts-express.com/HiVi-RT1C-A-Planar-Isodynamic-Tweeter-297-400?quantity=1
i am not partial to partsexpress by the way. i would buy everything wherever it is cheapest.
i think this driver makes a lot of sense as supertweeter line array ...
i can also use an array of cone drivers below 1 khz ...
it's the 1 khz to 10 khz i can't figure out ...
there is this:
https://www.parts-express.com/GRS-PT6825-8-8-Planar-Mid-Tweeter-8-Ohm-272-126?quantity=1
this:
https://radianaudio.com/collections/ribbon/products/lm8k-wide-band-planar-ribbon-transducer
and this:
https://www.parts-express.com/Peerless-830983-2-Full-Range-Woofer-264-1042?quantity=1
( it's twice as cheap at digikey, but they have a long link )
in case of peerless you would have to use four of the 2" drivers as replacement for every 8" planar. but at $17 each from digikey that's only $70 for four of them or about the same as what GRS planar costs, and 1/3 as much as Radian.
peerless is 82 db / watt and 25 watt
GRS claims 92 db but looks like it's actually 87 db, and claims 35 W
Radian is legitimately 95 db but i am suspicious of 60W because it's so similar to GRS just with bigger magnets basically, which shouldn't have effect on power handling, only efficiency
anyway putting four 2" drivers in parallel should bring overall efficiency from 82 to 88 db and overall power handling from 25W to 100W, which means it now matches GRS efficiency but with 2X power handling and also flatter response and more excursion capability all at the same price ...
the Radian still leads with about 5 db more overall output capability ( even with lower power handling ) versus four Tymphanys ... but is that extra 5db worth 3X the price ?
personally if i'm building a giant $$$ array i want rock concert SPL but it seems that an array of Tymphanys should be able to hit about 115 dba whereas rock concert level is 100 dba ( limited by law ).
does that mean the Radian can't be justified for use in an array system for home use due to its price ?
in a prosound setting that extra 5db could allow the array to throw further but at home this is not an issue.
thoughts ?
https://www.parts-express.com/HiVi-RT1C-A-Planar-Isodynamic-Tweeter-297-400?quantity=1
i am not partial to partsexpress by the way. i would buy everything wherever it is cheapest.
i think this driver makes a lot of sense as supertweeter line array ...
i can also use an array of cone drivers below 1 khz ...
it's the 1 khz to 10 khz i can't figure out ...
there is this:
https://www.parts-express.com/GRS-PT6825-8-8-Planar-Mid-Tweeter-8-Ohm-272-126?quantity=1
this:
https://radianaudio.com/collections/ribbon/products/lm8k-wide-band-planar-ribbon-transducer
and this:
https://www.parts-express.com/Peerless-830983-2-Full-Range-Woofer-264-1042?quantity=1
( it's twice as cheap at digikey, but they have a long link )
in case of peerless you would have to use four of the 2" drivers as replacement for every 8" planar. but at $17 each from digikey that's only $70 for four of them or about the same as what GRS planar costs, and 1/3 as much as Radian.
peerless is 82 db / watt and 25 watt
GRS claims 92 db but looks like it's actually 87 db, and claims 35 W
Radian is legitimately 95 db but i am suspicious of 60W because it's so similar to GRS just with bigger magnets basically, which shouldn't have effect on power handling, only efficiency
anyway putting four 2" drivers in parallel should bring overall efficiency from 82 to 88 db and overall power handling from 25W to 100W, which means it now matches GRS efficiency but with 2X power handling and also flatter response and more excursion capability all at the same price ...
the Radian still leads with about 5 db more overall output capability ( even with lower power handling ) versus four Tymphanys ... but is that extra 5db worth 3X the price ?
personally if i'm building a giant $$$ array i want rock concert SPL but it seems that an array of Tymphanys should be able to hit about 115 dba whereas rock concert level is 100 dba ( limited by law ).
does that mean the Radian can't be justified for use in an array system for home use due to its price ?
in a prosound setting that extra 5db could allow the array to throw further but at home this is not an issue.
thoughts ?
I put 10, 2 inch 4 ohm drivers in a mini 901 box. Sounds good with no EQ.
10 ohms impedance takes 100w
10 ohms impedance takes 100w
This is a very good driver in a line array. No need for a super tweeter array.
only for bragging rights so i can say it goes to 40 khz.
i know stuff over 10 khz is irrelevant and Radian easily goes to 10K and can probably be EQd to go to 20 but with some beaming in the horizontal plane ...
basically my estimate based on mounting diagrams is that Radian 8" has radiating area about 35 mm wide, while the HiVi has a radiating area only 10 mm wide. this is why HiVi can only go down to 3 khz but also why it can go up to 40 khz and won't beam horizontally in the audible range ...
i just don't see any harm in adding a supertweeter array with 7 to 10 khz crossover. i used to run Beyma Bullet supertweeters in my car with 7 khz crossover to 1.5" Scan Speak dome mid-tweeter and the sound was amazing. this Radian is essentially a 1.5" wide mid-tweeter.
10 khz crossover would be altogether transparent ( based on both equal loudness curves and music energy content ) and probably why JBL chose 10 khz in the Marquis Series speakers for crossover between 3" titanium compression driver and 1.5" phenolic bullet supertweeter, but i think the 8" radian could benefit from a lower XO say 8 khz based on where it begins to beam ...