DI Boxes

[tauzero]

I think that suggestion of a Y-adaptor like [url="http://www.maplin.co.uk/module.aspx?ModuleNo=1272&doy=15m6"]this[/url] would work well with a little headphone amp, either homebrew (which would cost around a tenner for something simple) or something like [url="http://www.djmmusic.com/itemdesc.asp?ic=DE15"]this.[/url] Or perhaps the Dean Bass-in-a-box for £25.

[obbm]

[quote name='tauzero' post='219552' date='Jun 15 2008, 11:34 PM']I think that suggestion of a Y-adaptor like [url="http://www.maplin.co.uk/module.aspx?ModuleNo=1272&doy=15m6"]this[/url] would work well with a little headphone amp, either homebrew (which would cost around a tenner for something simple) or something like [url="http://www.djmmusic.com/itemdesc.asp?ic=DE15"]this.[/url] Or perhaps the Dean Bass-in-a-box for £25.[/quote]

I agree. The problem is that most of these devices are designed to just have an instrument plugged into them. If you try and Tee them off the cable from the bass to the amp you effect the quality of the signal. I know, I've tried it. It starts to knock the HF off and that is unacceptable.

I found an Australian made DI box that had an instrument loop-through, transformer balanced DI out and a very high impedance FET buffered output. Now that is interesting but unfortunately not available here.

[tauzero]

[quote name='obbm' post='219605' date='Jun 16 2008, 08:03 AM'][quote name='tauzero' post='219552' date='Jun 15 2008, 11:34 PM']
I think that suggestion of a Y-adaptor like [url="http://www.maplin.co.uk/module.aspx?ModuleNo=1272&doy=15m6"]this[/url] would work well with a little headphone amp, either homebrew (which would cost around a tenner for something simple) or something like [url="http://www.djmmusic.com/itemdesc.asp?ic=DE15"]this.[/url] Or perhaps the Dean Bass-in-a-box for £25.[/quote]

I agree. The problem is that most of these devices are designed to just have an instrument plugged into them. If you try and Tee them off the cable from the bass to the amp you effect the quality of the signal. I know, I've tried it. It starts to knock the HF off and that is unacceptable.
[/quote]
A homebrew job should be able to do it with no degradation - use two op-amps, the first one as a unity gain very high impedance buffer. Any tone controls, etc, would go into the feedback loop for the second op-amp, which could drive headphones direct.