Building bipoles
JayMX
Posts: 246
So I spent the afternoon hacking another couple of pairs of Krix cinema speakers, turning them into bipoles for my buddy's home theater. I built a center channel out of another pair of these back in December.
https://forum.polkaudio.com/discussion/184503/building-a-center-channel-with-sda-srs-styling-and-crossover-questions#latest
I’ve always used plain old wood glue on projects like this, but I was wondering if anyone who has built speakers could recommend better glue, like what polk used on the vintage cabinets? That stuff is tough! Any suggestions would be appreciated! Thanks in advance.
Dissembled the original cabinets carefully, trimmed to fit the new form factor.
First try was shallower. Had to go to a 45 deg to maintain clearance for the drivers and ports inside the new cabs.
Dry fitting the final form factor:
https://forum.polkaudio.com/discussion/184503/building-a-center-channel-with-sda-srs-styling-and-crossover-questions#latest
I’ve always used plain old wood glue on projects like this, but I was wondering if anyone who has built speakers could recommend better glue, like what polk used on the vintage cabinets? That stuff is tough! Any suggestions would be appreciated! Thanks in advance.
Dissembled the original cabinets carefully, trimmed to fit the new form factor.
First try was shallower. Had to go to a 45 deg to maintain clearance for the drivers and ports inside the new cabs.
Dry fitting the final form factor:
Current Collection:
Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)
Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...
Pairs that have passed through:
Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2
...and more to come, it’s a sickness.
Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)
Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...
Pairs that have passed through:
Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2
...and more to come, it’s a sickness.
Comments
"No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
I always enjoy watching your build threads Jay.
Kinda excited to see how they sound and work out. Concerned that the bi-poles may have more driver than volume. But they’re surrounds so we’ll roll em off a little high
Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)
Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...
Pairs that have passed through:
Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2
...and more to come, it’s a sickness.
Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)
Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...
Pairs that have passed through:
Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2
...and more to come, it’s a sickness.
The bipoles sound surprisingly good. Experimented with wiring the crossovers out of phase di-pole) and that did bad things to the sound. I’ll have to see what sounds best in room where they’re going to be installed.
Monitor 4a (Peerless), Monitor 4b (Peerless), Monitor 5a (Peerless), Monitor 5b (SL2000), Monitor 7b (Peerless), Modified Monitor 7c’s (194’s, Dynamat, Sonicaps, Mills, H-nuts), SDA CRS+ (SL2000), RTA12c (194's), SDA SRS 2 (SL2000)
Repair pile: SRS 3.1TL (198’s), RTA 11T's, (1) lonely RTA 11TL to become a center channel... someday...
Pairs that have passed through:
Monitor 5b (SL1000), Monitor 10a (Peerless), Monitor 10c (3x pair), RTA8, RTA8TL, SDA2, SDA2a, SDA1b, SDA SRS2
...and more to come, it’s a sickness.
"No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro