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SB Acoustics SB12PAC25-4 full range?
SB Acoustics SB12PAC25-4 full range?
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Old 1st January 2018, 02:50 AM   #21
akarma 76 is offline akarma 76
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Very interesting driver. Fs is very low for such size, decent sensitivity, good xmax. It looks like very good candidate for micro monitor. The only weak side is a plastic frame. Wanna put my hands on it
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Old 1st January 2018, 03:01 AM   #22
globalplayer is offline globalplayer  Germany
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Looks like a good midrange.
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Old 1st January 2018, 03:27 AM   #23
akarma 76 is offline akarma 76
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Satellite for subwoofer with xover 80-85Hz.
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Old 1st January 2018, 06:20 AM   #24
mandoman is offline mandoman  Australia
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I have used this driver in a mini monitor and listen to it every day in the workshop. For the money it is very hard to beat, the midrange is excellent. It is not a full range driver, the breakup peak is quite nasty and it has significant sibilance if used full range. My mini monitor started off with a cheap tweeter, but ended up with the Satori tweeter because that little 4" aluminium driver sounded so good when crossed over around 2.2kHz. Incredible value for money if used as a midrange or mini midwoofer and not as a full range.
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Old 1st January 2018, 06:55 AM   #25
akarma 76 is offline akarma 76
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Quote:
Originally Posted by mandoman View Post
My mini monitor started off with a cheap tweeter, but ended up with the Satori tweeter because that little 4" aluminium driver sounded so good when crossed over around 2.2kHz. Incredible value for money if used as a midrange or mini midwoofer and not as a full range.
Thanks for detailed comment. How low do you think it can play without any significant distortion considering moderate volume? Can it reach to 80Hz?
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Old 1st January 2018, 07:57 AM   #26
mandoman is offline mandoman  Australia
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It can easily reach 80Hz. I can't remember exactly what I tuned the box to, but I think it was 55Hz bass reflex. It produces a surprisingly good bass for such a small speaker. I think it was around 4L, but it was 2 years ago when I made it, so I can't remember the exact details. It is never turned up very loud in the workshop. Originally I was going to use it with a sub, but never got around to making the sub and there is enough bass for what it was designed for. Troels used this woofer for a small TV speaker with a different tweeter and he agrees with me about the excellent midrange. My mini (or micro whatever you like to call it) monitor is by a mile the best sounding small speaker I have made. Smooth detailed midrange and the Satori tweeter gives it a gloriously clean sounding treble. It seems crazy to spend more than 4 times what the woofer cost on the tweeter, but the other tweeters I tried did not sound right to me, and the Satori will easily handle a low crossover freq. The box is solid wood so it looks great as well. Fitting the crossover into such a small box was a bit of a challenge.
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Old 1st January 2018, 04:58 PM   #27
FullRangeMan is offline FullRangeMan  Brazil
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Quote:
Originally Posted by larryldspkr View Post
This driver works great in a 6.5 ltr BR tuned to 60 hz!

Larry
This is paper cone?
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Old 1st January 2018, 05:05 PM   #28
FullRangeMan is offline FullRangeMan  Brazil
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Quote:
Originally Posted by xrk971 View Post
Be careful with that 12kHz peak - as an aluminum cone driver it means this will have a significant ring in the impulse response. This will add shimmer and "air" to the music that is not naturally present. Some may like that. It will also smear sharp transient detail. The CHR70 being an aluminum cone with resonant peaks will not be free of this either.

You might want to look at similar paper cone or fiberglass cone drivers to avoid this peak.
There is no music in that 12Khz range maybe only a lost harmonic from a violin, I happy it will add some air to the music, seems it will be a romantic sound presentation.

But this SB is a great FR driver, the freq chart is one of the best I have seen for hi-fi music, the only prob is the sensitivity is too low, 87dB avoid its use by small tube amps. This driver 4 ohms impedance intend its use in series only to friendly 8 or 16 ohms.
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Last edited by FullRangeMan; 1st January 2018 at 05:11 PM.
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Old 1st January 2018, 09:15 PM   #29
mandoman is offline mandoman  Australia
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Quote:
This is paper cone?
No, it is an aluminium cone.

Quote:
But this SB is a great FR driver
If you like a rough sibilant treble I guess you could use it FR. I tried it FR, but could not stand the treble. It needs a tweeter.

Last edited by mandoman; 1st January 2018 at 09:19 PM.
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Old 1st January 2018, 10:40 PM   #30
larryldspkr is offline larryldspkr  Canada
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FullRangeMan
Yes the SB 4inch I'm using full range has a paper cone! I have them at work now, listening 8hrs a day. Still sound great, very impressed with these!

Larry
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