I want to sell 17x GRS PT6816-8.
I want €500 for all of them, the buyer pays the shipping fee.
The drivers are currently in Stockholm, Sweden. Local pickup would of course be preferable.
They have only been used during testing of the drivers and speaker designs. My reason for selling is that I want to build a physically curved CBT and the driver is too tall to work well in that application. They shine, however, in a straight array.
All drivers are in their original cardboard boxes as received from Parts Express. I also have the original outer shipping box with packing from PE.
Consistency across all drivers is great as can be seen in my measurements of them:
Distortion: https://drive.google.com/file/d/1Pnbsi0WBYmTebrhg_wYINsAWpoJWUaO9/view?usp=sharing (ignore frequency response, they were measured at close distance in a vice with the goal of consistent measurement conditions across all drivers, thus not a good method for frequency response. The frequency response measures as the posted response in the PDF spec of the driver.)
Impedance: https://drive.google.com/file/d/1Neo_xRSz7W4rkoZBHE-D1KE5SBQU_bMm/view?usp=sharing
I want €500 for all of them, the buyer pays the shipping fee.
The drivers are currently in Stockholm, Sweden. Local pickup would of course be preferable.
They have only been used during testing of the drivers and speaker designs. My reason for selling is that I want to build a physically curved CBT and the driver is too tall to work well in that application. They shine, however, in a straight array.
All drivers are in their original cardboard boxes as received from Parts Express. I also have the original outer shipping box with packing from PE.
Consistency across all drivers is great as can be seen in my measurements of them:
Distortion: https://drive.google.com/file/d/1Pnbsi0WBYmTebrhg_wYINsAWpoJWUaO9/view?usp=sharing (ignore frequency response, they were measured at close distance in a vice with the goal of consistent measurement conditions across all drivers, thus not a good method for frequency response. The frequency response measures as the posted response in the PDF spec of the driver.)
Impedance: https://drive.google.com/file/d/1Neo_xRSz7W4rkoZBHE-D1KE5SBQU_bMm/view?usp=sharing
Attachments
I have decided to sell them in matched pairs (within 1% impedance as per the impedance measurements I linked to).
€64 for each pair.
Shipping within EU is €23 for a box that can fit 2 pairs (4 drivers).
1 pair sold, 7 pairs left + 1 driver.
€64 for each pair.
Shipping within EU is €23 for a box that can fit 2 pairs (4 drivers).
1 pair sold, 7 pairs left + 1 driver.
You are correct. If anything the PT6816 has a slightly better top end but in trade of less low frequency extension as you describe.
While the horizontal dispersion is pretty much perfect the vertical is quite limited due to the height of the driver so a common workaround is to use multiple drivers in mini arrays. 2 drivers seems the most common (but scales well with more drivers), often horn loaded to add extra gain and to control dispersion. One who bought a quad want to build a clone of the Es250 horns from Joseph Crowe. https://josephcrowe.com/blogs/news/e-250-dual-planar-front-horn
While the horizontal dispersion is pretty much perfect the vertical is quite limited due to the height of the driver so a common workaround is to use multiple drivers in mini arrays. 2 drivers seems the most common (but scales well with more drivers), often horn loaded to add extra gain and to control dispersion. One who bought a quad want to build a clone of the Es250 horns from Joseph Crowe. https://josephcrowe.com/blogs/news/e-250-dual-planar-front-horn
I made several speakers using wood turned spheres with coaxial drivers und Joseph designed tweeter horns with mbs compression drivers but never had experience with planar drivers only hight frequency ribbon drivers. I'd like to make proper small factor satellites using planar drivers but not sure about lower frequencies I have idea about with front and back horn but need some drivers to make experiments. The idea to make satellite using only one planar driver and subwoofer for >300Hz. By specification looks it should work but in reality ????
As small satellites I think 300 hz is too low for a single PT6816. I'd suggest more in the 600 hz range. You might get down to 300-400 with a huge ~ 20" wide horn or but then we aren't in small satellite territory anymore. I've added distortion figures in a dipole setup normalized to 91 and 94 dB with 500 hz LR4. While it is not a true representation of a sealed setup it does show when the driver starts to misbehave and not output cleanly anymore.
If you want a small sattelite I would suggest either one or two front facing PT6816 (mounted on top of each other) and then small shallow woofers mounted to the side with a crossover in the 600 hz @ LR4 or 800-1000 @ LR2. The second PT6816 would be to bump the height of the speaker and thus help with vertical dispersion.
Or go with a different driver. A single planar driver more suitable for 200-300 hz is probably the PT5010 but it needs a separate tweeter.
If you want a small sattelite I would suggest either one or two front facing PT6816 (mounted on top of each other) and then small shallow woofers mounted to the side with a crossover in the 600 hz @ LR4 or 800-1000 @ LR2. The second PT6816 would be to bump the height of the speaker and thus help with vertical dispersion.
Or go with a different driver. A single planar driver more suitable for 200-300 hz is probably the PT5010 but it needs a separate tweeter.
Attachments
Hi
Thanks for advice just got some ideas and like to check in real live 🙂 . I'd like to order two drivers from you how to manage ? Thanks
Thanks for advice just got some ideas and like to check in real live 🙂 . I'd like to order two drivers from you how to manage ? Thanks
3 pairs left, and I've decided to reduce the price (including shipping within EU)
€70 for 2.
€120 for a 4.
€170 for 6.
€70 for 2.
€120 for a 4.
€170 for 6.
Yes I am, and surprisingly traceable packages were cheaper than I thought. The price is the same for 2 and 4, 6 is €5 more expensive. We can also do the transaction in USD. By the currency conversion in Google I get:
$77,90 for 2
$133,54 for 4
$194,75 for 6
Including traceable shipping to US.
Any customs fees will be paid by the buyer.
$77,90 for 2
$133,54 for 4
$194,75 for 6
Including traceable shipping to US.
Any customs fees will be paid by the buyer.