Zaph SR71 as a live ukulele amp? - diyAudio
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Old 3rd December 2008, 01:19 AM   #1
santiu is offline santiu  United States
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Default Zaph SR71 as a live ukulele amp?

Hey all! Not sure if this is the right forum and this is sort of a weird question, but i'll give it a shot anyways. So i play ukulele, and i'm looking to build an amp for an acoustic-electric I have. I figured, a hi-fi speaker would fit the bill since most nice acoustic amps seem to be just nice channel strips mated to a nice PA type speaker. Especially since the uke doesn't get too low, I figured a nice 2-way speaker would work well.

So, that being said. How do you guys think the SR71 would fair? I'm wondering just how loud one of these can get (powered by a 120W amp). It wouldn't need to get super loud since in very loud situations the ukulele would just go into a real PA. I'm just looking to get the same sort of output as say another 100W acoustic amp (like a Fishman Loudbox 100). But i'm wondering if this speaker could handle running at high volume most of the time without the speaker breaking up.

thoughts? Suggestions? Rotten Tomatoes? I'm i crazy?
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Old 3rd December 2008, 07:16 AM   #2
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I am not familiar with the sound of live ukuleles. But I would expect the Scanspeak drivers reproduce the sound of string instruments better. I built a two way like the ZD5, but you would want a bit more sensitivity. Zaph's ZRT project has a 2-way sealed version that would be better for you. While the drivers are more expensive, you would only need one of each.
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Old 3rd December 2008, 08:07 AM   #3
pelanj is offline pelanj  Czech Republic
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Hello, for an ukulele (and most of stringed musical instruments for that matter) I would prefer to use a full range PA speaker, say 10" in a combo shaped open backed box.
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Old 3rd December 2008, 04:15 PM   #4
sreten is offline sreten  United Kingdom
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The Fishman Loudbox 100 states 100W and 114dB at 1m.

Basically this implies 94dB/W for the drivers, the SR71 is
nowhere near this value and will relatively eat power.

The 8" P one or 10" P two should do the job, both 95dB/W.

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Old 4th December 2008, 02:20 AM   #5
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The Hawthorne Audio Silver Iris might work nicely. It's a 15" woofer with a coaxial horn tweeter. 95 dB or so efficient, rated for 150 W. I believe that they have been used for acoustic guitar amplification, so a uke should be no problem.

The Hawthornes are meant for open baffle applications, so the cabinet can be quite small and easy to transport. I built some minimalist baffles for my pair, and gave them to my son for his dorm room:

Click the image to open in full size.

They could easily be mounted to tripod stands for PA duty.

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