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Here is my "Birthday Build" for a friend's 50th birthday present, commissioned by his wife. It uses a Vifa XT25BG60-04 1" Shielded Dual Ring Radiator Tweeter, and a Peerless 830875 6-1/2" Nomex Cone HDS Woofer. The enclosure is a 25 liter bass reflex box tuned to 42 Hz. The crossover is adapted almost exactly from a design by Jay a.k.a. Brewski in an old thread here on Parts Express:
I used a mix of Audyn and Jantzen (the lower end ones) for the series caps and NPE for the large caps in Zobel and the RLC. Inductors were Jantzen. I added an L-pad (not shown in diagram) consisting of a 3 Ohm resistor in series and an 8 Ohm resistor in parallel to match sensitivity and reduce an upwards tilt of the tweeter response.
The cabinets have 3 internal window braces, foam dampening (mattress topper) and the port was made from a 3" pipe, using 60 degree knee to make it fit, and flared on the outside using a chamfer bit. The sides of the baffle have a 1/2" roundover. The cabinet is covered in zebrawood veneer and finished with Polycril.
The attached measurements were taken at 1 meter using REW and a umik-1 in my garage (as shown) and gated at 10ms (left) and 50ms (right). Response curves include woofer and tweeter alone (both hot pink), on axis (purple), 30 deg (green), and 60 deg (yellow-ish). The speakers are not intended to be toed in.
I used a mix of Audyn and Jantzen (the lower end ones) for the series caps and NPE for the large caps in Zobel and the RLC. Inductors were Jantzen. I added an L-pad (not shown in diagram) consisting of a 3 Ohm resistor in series and an 8 Ohm resistor in parallel to match sensitivity and reduce an upwards tilt of the tweeter response.
The cabinets have 3 internal window braces, foam dampening (mattress topper) and the port was made from a 3" pipe, using 60 degree knee to make it fit, and flared on the outside using a chamfer bit. The sides of the baffle have a 1/2" roundover. The cabinet is covered in zebrawood veneer and finished with Polycril.
The attached measurements were taken at 1 meter using REW and a umik-1 in my garage (as shown) and gated at 10ms (left) and 50ms (right). Response curves include woofer and tweeter alone (both hot pink), on axis (purple), 30 deg (green), and 60 deg (yellow-ish). The speakers are not intended to be toed in.
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