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Based on the shielded RS150's, I used to call these the Legacies, as in the last of their kind. But since the new RS150's are a drop in replacement, keeping the design alive, I'm calling them the holdouts.
The crossover is a symmetrical, acoustic Butterworth 3rd order, crossed with the RS28F's at 1.4kHz.
The cabinet is 3/4 MDF all around at 40 liters internally. I used the iron-on method with Better Bonds heatlock glue raw walnut veneer. The RS150's modeled the best in Unibox of all the reasonably priced 8-ohm 5 1/4 midwoofers I could find. With a port is 6" x 3", I'm able to get an F3 of about 30Hz.
How do they sound? Well I voiced them actively over 3 months of Winter, logging many hours of listening and tweaking. I used a wide variety of material and musical genres, standard and hi-res digital formats, as well as vinyl and even cassette tape sources. Throughout the process, a new source or material would reveal problem or issue, that I would address in subsequent tweaking. Previously, I've also received feedback that my voicing tend toward "polite" or "laid-back", so I made a conscious attempt at a more balanced sound.
I'm extremely pleased with the results. I'm already a fan of the RS28A and Usher 9950-20 tweeters, so I new I would like the fabric dome. I didn't know how much! I would say its sound is somewhere between the clean and lean sound of the RS28A and the super warm and smooth sound of the 9950, with the best characteristics of each.
The RS150 is one hell of a 5 1/4" midwoofer, very clean without any fatigue-producing harshness or false detail. I'm getting great bass performance paired up in this tower configuration. A full symphony, with even a large chorus or organ thrown in, is reproduced with authority.
UPDATE:
An alternative XO for a flatter response can be seen here:
The crossover is a symmetrical, acoustic Butterworth 3rd order, crossed with the RS28F's at 1.4kHz.
The cabinet is 3/4 MDF all around at 40 liters internally. I used the iron-on method with Better Bonds heatlock glue raw walnut veneer. The RS150's modeled the best in Unibox of all the reasonably priced 8-ohm 5 1/4 midwoofers I could find. With a port is 6" x 3", I'm able to get an F3 of about 30Hz.
How do they sound? Well I voiced them actively over 3 months of Winter, logging many hours of listening and tweaking. I used a wide variety of material and musical genres, standard and hi-res digital formats, as well as vinyl and even cassette tape sources. Throughout the process, a new source or material would reveal problem or issue, that I would address in subsequent tweaking. Previously, I've also received feedback that my voicing tend toward "polite" or "laid-back", so I made a conscious attempt at a more balanced sound.
I'm extremely pleased with the results. I'm already a fan of the RS28A and Usher 9950-20 tweeters, so I new I would like the fabric dome. I didn't know how much! I would say its sound is somewhere between the clean and lean sound of the RS28A and the super warm and smooth sound of the 9950, with the best characteristics of each.
The RS150 is one hell of a 5 1/4" midwoofer, very clean without any fatigue-producing harshness or false detail. I'm getting great bass performance paired up in this tower configuration. A full symphony, with even a large chorus or organ thrown in, is reproduced with authority.
UPDATE:
An alternative XO for a flatter response can be seen here:
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