[Muser]

Hi All
I purchased a Mach 5 IXL 15.2.2 driver based on a suggestion from Graham (Gperkins_1973) and in part because Mike P. built one and seemed to like it. I'll be posting my build here to thank the community, especially Graham and Mike P, for the input.

I am nearly complete with my build (sealed 2.1 cubic feet internal volume, exclusive of driver) powered by a Hsu VTF3 plate amp. I'm only using a high pass filter with it. I'm enjoying the combination. I now plan to build a second matching subwoofer that will also function as a subwoofer/stand for my monitors. Hsu specs the VTF3 amplifier for 500 watts at 8 ohms, 250 at 4 Ohms, but indicated that the amplifier is designed to drive only one subwoofer. I'll assume for the moment that I'm getting about 250 watts with the Hsu. My question is if I upgrade to a stereo amplifier to drive both woofers (rather than adding another plate amp for the new driver), how much power should I shoot for? I'm mostly interested in music and any output below 30Hz would be gravy for movies, which are a whole order lower importance.

In advance, thanks for your feedback.

Larry

 

[Mike P.]

Do you have a link to the amp specs? The info I found stated it's a 350 watt amp.

Yellow is a VTF-3 amp assuming 350 watts at 4 ohms.

Orange is one sub on one channel of a EP4000 amp.

​

 

[Muser]

Mike
I don't have a spec sheet for the amp, the numbers I provided were given to me by Hsu.

I see that what you're pointing to with your graph is more power provides for higher SPLs throughout the graphed response. I thought I rhad ead Mach5's spec sheet, but just now noticed :scratch: that they list it as a power handling range of up to 800 watts. Clearly, then, more power yields higher SPLs. And it appears the Mach 5 can handle a lot more power than it's getting now. That's great, because this puts me at the threshold of how much power do I want to afford, and my pocket book speaks more clearly than what performance I want.

Thanks again. I am really enjoying the IXL15.2.2 and can happily recommend it to others as offering a nice output from a small cabinet.

Larry