Foreplay/Gainclone [message #8576] |
Sat, 27 November 2004 12:01 |
Manualblock
Messages: 4973 Registered: May 2009
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Illuminati (13th Degree) |
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Finally got around to installing the Anticipation upgrade in the Foreplay. I am running that into the Brian GT clone then to the Pi 4's. Using my Rotel 991 I am getting damned good sound. For some reason the Foreplay works real well with the GC, it provides a much more powerful presentation with deep and quick bass and nice 3d mids, I have been listening to this set-up now for 2 weeks. Tried it with my son's portable and I think you would be hard pressed to improve on that for the money.
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Re: Foreplay/Gainclone [message #8583 is a reply to message #8576] |
Tue, 30 November 2004 12:32 |
GarMan
Messages: 960 Registered: May 2009
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Illuminati (2nd Degree) |
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JR, Sounds like you're running something similar to Joe's JLTi tube-buffered gainclone. I found my gainclone works very well with my tube preamp too, although the bass is lacking at the very bottom end. Here's a thought: a 4 channel gainclone for biamping purposes. Build the two HF channels a usual, but give the two LF channels about 20,000 uF of reservoir capacitance per channel. From what I've read, increasing power supply reservoir increases bass quality, but mids and HF suffers. Gar.
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Re: Foreplay/Gainclone [message #8584 is a reply to message #8583] |
Tue, 30 November 2004 12:37 |
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Wayne Parham
Messages: 18789 Registered: January 2001
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Illuminati (33rd Degree) |
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Hi Gar, You betcha on the parallel capacitance in the power supply. Large caps like that act like batteries, and allow high current surges in excess of what the supply can provide on a constant basis. This is one place where the adage "bigger is better" definitely applies. Wayne
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Re: Foreplay/Gainclone [message #8585 is a reply to message #8584] |
Tue, 30 November 2004 14:27 |
GarMan
Messages: 960 Registered: May 2009
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Illuminati (2nd Degree) |
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It's kind of fun to cut the A/C on my preamp and still have FULL volume for 30 seconds, and listen for another 10 seconds as the sound fades. I agree, bigger is better for almost all amps. For some reason, it's not the case for the gainclone, I haven't found an explanation as to why the gainclone suffers in the mids and hi's with anything more than 1500 uF per rail, but it seems to be the word on the net. Gar.
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Re: Foreplay/Gainclone [message #8586 is a reply to message #8576] |
Tue, 30 November 2004 14:33 |
Skip Pack
Messages: 51 Registered: May 2009 Location: Hollister, California
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Baron |
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I've been using a fairly stock Foreplay into an 1875 inverted gainclone. It works great, but I'd be a little leary of an inpedance mismatch driving two gainclone inputs for bi-amping. If I remember correctly, the Foreplay has an output impedance of 1.3K which suggests that you would want 25-30K per gainclone input. Since Foreplays have a ton of gain, a dropping tranformer might work beautifully.Skip
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