I am in the planning stages for my new dipole 4-channels HT system. All channels will be based on RD-75 driver. Here is what I have in mind.
For my two front channels I would like to build a 3-way system, with each side consisting of:
1. The RD-75 in its own baffle. This will cover 300Hz and up range.
I am going fabricate a one-sided trapezoidal baffle with a sloping 6-inch diameter half-round (found in http://www.tapeease.com/2rounds.htm ) on one side of it. I will route the opening for the RD-75 driver close to the vertical edge of the baffle. This vertical edge will be treated with a 1.5-inch half-round. The top will be about 8 inches and the bottom about 14 inches.
The straight front will blend into a 6-inch half-round on the slopping side. The other end of this 6-inch diameter half-round will be connected to the slopping straight trapezoidal section. This section will be connected to the back of the front section. Resulting in a pizza-piece-like cross-section. All in all, the baffle should have no edges.
2. A midrange array consisting of 4 Scan Speak 10-inch drivers, the 25W/8565 in Phoenix baffle (http://www.linkwitzlab.com/m_panel.htm). That is, the baffle will be identical to the Phoenix design just a bit longer to accommodate the 4 drivers. The drivers will be separated by 1 inch. So the total length might be about 50 inches. This baffle will have its own 1-inch foundation plate. This array will cover 70-300 Hz range.
3. The bass will consist of 2 Phoenix W-woofers. I intend to use the implementation as shown in Woofer3 in Linkwitz’s site (http://www.linkwitzlab.com/woofer3.htm on the very bottom of the page) utilizing the Peerless 830500 drivers. The two cabinets will be setup on top of each other. Naturally they will be positioned facing in the opposite direction. The woofers will cover up to 70 Hz.
I intend to position the Phoenix midrange baffle on top of the woofers. So it will be a 3-unit structure of about 78 inches (14+14 inches for the woofer cabinets and 50 inches for the midrange) in a total height. The separate baffle housing the ribbon will be placed next to it.
For the two surround channels, I am thinking of pairing the H-frame woofer, as shown in http://www.linkwitzlab.com/proto.htm#PW1 crossed at 150-Hz with RD-75 ribbon housed in the baffle as discussed above. The RD-75 will work down to 150 Hz and since surround channels do not do all that much work, I hope this combination will work out.
I intend to use an active crossover with all channels. Well, I would greatly appreciate any comments on this system.
Regards,
Victor
For my two front channels I would like to build a 3-way system, with each side consisting of:
1. The RD-75 in its own baffle. This will cover 300Hz and up range.
I am going fabricate a one-sided trapezoidal baffle with a sloping 6-inch diameter half-round (found in http://www.tapeease.com/2rounds.htm ) on one side of it. I will route the opening for the RD-75 driver close to the vertical edge of the baffle. This vertical edge will be treated with a 1.5-inch half-round. The top will be about 8 inches and the bottom about 14 inches.
The straight front will blend into a 6-inch half-round on the slopping side. The other end of this 6-inch diameter half-round will be connected to the slopping straight trapezoidal section. This section will be connected to the back of the front section. Resulting in a pizza-piece-like cross-section. All in all, the baffle should have no edges.
2. A midrange array consisting of 4 Scan Speak 10-inch drivers, the 25W/8565 in Phoenix baffle (http://www.linkwitzlab.com/m_panel.htm). That is, the baffle will be identical to the Phoenix design just a bit longer to accommodate the 4 drivers. The drivers will be separated by 1 inch. So the total length might be about 50 inches. This baffle will have its own 1-inch foundation plate. This array will cover 70-300 Hz range.
3. The bass will consist of 2 Phoenix W-woofers. I intend to use the implementation as shown in Woofer3 in Linkwitz’s site (http://www.linkwitzlab.com/woofer3.htm on the very bottom of the page) utilizing the Peerless 830500 drivers. The two cabinets will be setup on top of each other. Naturally they will be positioned facing in the opposite direction. The woofers will cover up to 70 Hz.
I intend to position the Phoenix midrange baffle on top of the woofers. So it will be a 3-unit structure of about 78 inches (14+14 inches for the woofer cabinets and 50 inches for the midrange) in a total height. The separate baffle housing the ribbon will be placed next to it.
For the two surround channels, I am thinking of pairing the H-frame woofer, as shown in http://www.linkwitzlab.com/proto.htm#PW1 crossed at 150-Hz with RD-75 ribbon housed in the baffle as discussed above. The RD-75 will work down to 150 Hz and since surround channels do not do all that much work, I hope this combination will work out.
I intend to use an active crossover with all channels. Well, I would greatly appreciate any comments on this system.
Regards,
Victor
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