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In the Forum: Horn-Loaded Speakers
In the Thread: Designing and building a 5 channel horn loaded (looking for directions on my way)
Post Subject: A driver for fundamentals channel.Posted by Romy the Cat on: 11/11/2015
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 kodomo wrote:
Oh and the fundamentals channel although begging me to play a wider range, more or less disappears and actually helps the sound to have more volume (not loudness) when covering a narrower range. It sounds like I will cover just an octave it and its height won't be a problem like I thought it might. I sit about 14 feet away from the mouth of the upperbass horn.I am planning to get a foster r100t attenuator for my fundamental channel. I think it can help me to adjust my system better and can vary in its attenuation depending on my listening distance.

So far I am liking the Radians, but time will tell. First few months impression is it doesn't sound as edgy as my BMS 4592nd-mid 16ohms but seems to have the detail with a more relaxed presentation. Are BMS 4592nd-mids more dynamic or too dynamic I haven't assessed yet.

The foster attenuator if fine for fundamentals. It is very inductive and will eat all your HF but you do not need them anyhow. The selection of driver for fundamental channel is a bit tricky. I find that you do not need a good driver but rather  a driver that would go a very few thing in a very specific way. The  fundamentals driver is a viola driver, it do not need to have the violin finger work but in the same time it should not have a rich viola tone. it is kind of contra intuitive - you almost want to have a bad driver in there. The problem is that in one octave in lower MF and relatively sharp filtration the channel will not develop "tone". So, I would not go for tone but rather for texture. I find that if you get an atrocious driver and they make it even more evil by idle it load then it might be a good candidate for fundamentals. Of couse everything in moderation and you need to make it to work with your MF and upper bass. Still, the fundamental driver is kind of filling the gap driver and it more gives "sonic fog" then sound. I would like this "fog" has some tension, some kind of over rosined bow effect with a lot of "bite". Tone, it is what my MF driver does. the fundamentals just gives to MF a bit agitation at the bottom of MF.

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