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A 1" compression driver that can play low / mate with a 15" ?
Greeting everyone,
Recently I have taken up a project of refurbishing some PA speakers that I built about 15 years ago. Namely, I want to customize the crossover as I was never really happy with the frequency response. The cabs are 2-way with a 15" woofer and 1" exit compression driver on a CD horn. Both components are Carvin brand.
As I investigated and measured the drivers I found that one compression driver appears to be damaged. It is still making sound, but the impedance curve does not match the other driver/horn and does not look like that of a healthly driver.
I've done some research and I'm 90% sure that the driver is a rebadged Eminence PSD:2002 or at least it is diaphragm compatible. As I look at the specs of this driver, I see that the recommended minimum crossover frequency is 1.6k @ 18 db/oct. Ideally, I would like to cross the drivers over lower than that since I'm pairing them with 15" woofers and I'd like to avoid major off-axis anomalies.
So I'm thinking that with the price of the diaphragms being what they are, I might as well investigate just buying new compression drivers that are more compatible with my application.
The thing is, though, the cabs are built around a 1" threaded horn that would be difficult to replace with, say, a 2" exit model. The horn is surrounded by wood that supports the grill. I have not been able to find a same size / smaller horn for this dimension. FYI the outer dimensions of the mouth are 16.5" x 6". Furthermore, I am happy with the pattern control of the existing horn.
So now I'm looking for suggestions or experiences with 1" throat drivers that can play low to match the woofer. The application is low/medium level DJ use and medium level PA and stage monitor use. The existing crossover is on a PCB that I would like to reuse and provides for a 12db/oct topology on HP. However, it would probably not be too much trouble to fit another shunt capacitor somewhere to up it to 18db/oct.
Two candidates from PE stand out as contenders to me:
PRV Audio D280Ti-S with a minimum crossover of 1.2k @ 12db/oct , or
Dayton Audio DT250P-8 with a minimum frequency of 1.4k @ 12db/oct
I am interested in hearing any suggestions, and I thank you for your response!
Regards,
Dan
Recently I have taken up a project of refurbishing some PA speakers that I built about 15 years ago. Namely, I want to customize the crossover as I was never really happy with the frequency response. The cabs are 2-way with a 15" woofer and 1" exit compression driver on a CD horn. Both components are Carvin brand.
As I investigated and measured the drivers I found that one compression driver appears to be damaged. It is still making sound, but the impedance curve does not match the other driver/horn and does not look like that of a healthly driver.
I've done some research and I'm 90% sure that the driver is a rebadged Eminence PSD:2002 or at least it is diaphragm compatible. As I look at the specs of this driver, I see that the recommended minimum crossover frequency is 1.6k @ 18 db/oct. Ideally, I would like to cross the drivers over lower than that since I'm pairing them with 15" woofers and I'd like to avoid major off-axis anomalies.
So I'm thinking that with the price of the diaphragms being what they are, I might as well investigate just buying new compression drivers that are more compatible with my application.
The thing is, though, the cabs are built around a 1" threaded horn that would be difficult to replace with, say, a 2" exit model. The horn is surrounded by wood that supports the grill. I have not been able to find a same size / smaller horn for this dimension. FYI the outer dimensions of the mouth are 16.5" x 6". Furthermore, I am happy with the pattern control of the existing horn.
So now I'm looking for suggestions or experiences with 1" throat drivers that can play low to match the woofer. The application is low/medium level DJ use and medium level PA and stage monitor use. The existing crossover is on a PCB that I would like to reuse and provides for a 12db/oct topology on HP. However, it would probably not be too much trouble to fit another shunt capacitor somewhere to up it to 18db/oct.
Two candidates from PE stand out as contenders to me:
PRV Audio D280Ti-S with a minimum crossover of 1.2k @ 12db/oct , or
Dayton Audio DT250P-8 with a minimum frequency of 1.4k @ 12db/oct
I am interested in hearing any suggestions, and I thank you for your response!
Regards,
Dan
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