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I thought these were an exceptional design - must be audiophile, they are $360!
Mark 4 inch full range speakers English Markaudio CHP70 3rd generation 4 inch wood maze speaker-in Other Home Heaters from Home Appliances on Aliexpress.com | Alibaba Group
Mark 4 inch full range speakers English Markaudio CHP70 3rd generation 4 inch wood maze speaker-in Other Home Heaters from Home Appliances on Aliexpress.com | Alibaba Group
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An attempt at a desktop BL horn??
Btw, that looks like a MA CHR-70.3 not a CHP... and construction material is plywood and MDF.
AFAIK horns and small don't go well together...
maybe some one can run a sim?Yep, most of them. Well there are a few that use polymer composites and Majico does metal enclosures too, but that was not what I was referring too.
Seller call this "wood maze"... so I was expecting something like Boinicke Audio...
I thought recognizing importance of phase was an interesting point as well as using a metal cone driver. Not sure how well it performs in reality.
We do know that the A10.3 performs really well. This is a smallish box for them thou, and i'd guess MDF.
$220 USD/pr for the drivers, and larger (13-17 litre), a well built plywood box (with a rebate) will likely get more out of them.
dave
Those are just strange. A too short, zigzag (expanding/contracting/expanding) line. Either there is a new version of the CHP (no gen 3 here, althou i know they exist in the lab) or as zia suggests a CHR. Kinda pricey either way.
dave
Sound is loud, clear, fast, and very impressive.
The solid deep bass, with regard to the speakers of small diameter, precision and clean mid range, but I will do some for the frequency spectrum above 10kHz and have something to add to the linearization of the entire spectrum.
There's no any indication of micro/macro "reverb"-effect sound, and box is not critical of position to place in the room and the distance from the wall.
I have a small peak at the 800Hz feature (which must be solved by using an additional filter), and the continued decline of ~ 3-4dB / oct. above 10kHz (I'll add some super tweeter correction).
I left the possibility to combine different speakers connecting and get a different nominal impedance of the box (6, 24 and 96 Ohms) for connection to the OTL tube-amplifier (with an additional small transformer that will adapt the impedance of the future super-tweeter).