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This thread will document the measurements I take on the new RS150P-8 drivers I just received. My project plan is to pair them with some RS28A tweeters I bought a few weeks ago when they were the deal of the day (<$50). Initial visual impression is that they are very well made.
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Last edited by PWR RYD; 12-26-2013, 10:33 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me. -
Re: RS150P-8 measurements
Last edited by PWR RYD; 12-26-2013, 10:35 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me. -
Re: RS150P-8 measurements
Here are the measured T/S parameters right out of the boxes using an added mass of 20.5 g:
Driver A:
Re 6.201 ohms
Fs 57.2 Hz
Qms 2.246
Qes 0.4713
Le 0.6469 mH
Mms 6.215 g
Vas 0.406 Ft^3 (11.49 L)
Driver B:
Re 6.22 ohms
Fs 56.52 Hz
Qms 2.208
Qes 0.4664
Le 0.654 mH
Mms 6.413 g
Vas 0.4031 Ft^3 (11.41 L)
This is right out of the boxes. No flexing of the suspension by hand or anything. Pretty darn good!Last edited by PWR RYD; 12-26-2013, 10:36 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me.Comment
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Re: RS150P-8 measurements
T/S parameters after driver break in. I just run a 60 Hz sine wave to them at about 2 Watts which drives them close to x-max. They hum nicely but never sound like they are in distress (distortion from over excusion). I let them run for 30 minutes then cool down for an hour. Here are the individual drivers:
Driver A:
Re 6.161 ohms
Fs 56.52 Hz
Qms 2.184
Qes 0.4598
Le 0.6369 mH
Mms 6.382 g
Vas 0.405 Ft^3 (11.46 L)
Driver B:
Re 6.192 ohms
Fs 55.18 Hz
Qms 2.121
Qes 0.45
Le 0.6398 mH
Mms 6.372 g
Vas 0.4156 Ft^3 (11.76 L)Last edited by PWR RYD; 12-27-2013, 01:14 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me.Comment
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Re: RS150P-8 measurements
I'm hoping to get the kids to bed early tonight so I can start getting some frequency response measuresments. I was able to fab up the infinite baffle insert after I finished tiling our upstairs bath/shower walls (have to take advantage of the warmer weather today/tomorrow to clean out thin-set/grout buckets and tools outside). Anyway, here are a few quick shots of the insert and driver A mounted. Only takes a few minutes to set up my IB and OmniMic:
Last edited by PWR RYD; 12-27-2013, 07:07 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me.Comment
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Re: RS150P-8 measurements
Driver A: On axis frequency response:
Driver A: Frequency response at zero, 15, 30, and 45 degrees:
Last edited by PWR RYD; 12-28-2013, 12:46 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me.Comment
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Re: RS150P-8 measurements
Driver A distortion:
Last edited by PWR RYD; 12-28-2013, 12:47 PM.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me.Comment
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Re: RS150P-8 measurements
Reserved for in box measurements, polars, etc.Craig
The lowest possible F3 box alignment is not always the best alignment.
Designing and building speaker projects are like playing with adult Lego Blocks for me.Comment
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Re: RS150P-8 measurements
Reserved for me thanking you for doing this and posting the results in addition to commenting on them if there's anything to comment on.
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Re: RS150P-8 measurements
Awesome information, these are looking very nice, thanks for being the pioneer!Last edited by pknaz; 12-29-2013, 07:56 AM.Comment
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Re: RS150P-8 measurements
Reserved for thanking you for your effort.Last edited by [email protected]; 12-26-2013, 10:55 PM." To me, the soundstage presentation is more about phase and distortion and less about size. However, when you talk about bass extension, there's no replacement for displacement". Tyger23. 4.2015
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Re: RS150P-8 measurements
Looking forward to it!Don't listen to me - I have not sold any $150,000 speakers.Comment
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Re: RS150P-8 measurements
Can't wait!
I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
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Re: RS150P-8 measurements
The suspense is killing me man, seriously.
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Re: RS150P-8 measurements
Watching the "duck dynasty" chia pet grow while waiting. :rolleyes:Kenny
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