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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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It is currently 26 Jan 2021, 01:28

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 Post subject: Inexpensive Proto-typing
PostPosted: 30 Jan 2019, 14:00 

Joined: 30 Jan 2019, 13:51
Posts: 1
I would like to have an easy way to change box volumes - without wood.

Why - well I want an easy way to measure the speakers in a proposed box - to see how the volume and fill will affect T/S response and impedance before making the crossover and committing to a box size/volume.

think of an adjustable box volume to make comparison and analysis cheap but effective and repeatable.

Any ideas on material and approach?

PostPosted: 01 Feb 2019, 05:44 

Joined: 23 Feb 2017, 02:02
Posts: 677
I can tell you from listening experience if you want reall base, real deep and real low with accurate base production.
Skip all of the box R&D and go for a large 15inch or larger woofer.

Only those will get you real base, listeing comparison shows smaller ones to very lack mid lows, super low.
But the speaker box and baffles allows smaller ones to get some lows but not the full low range that big ones get you.

The one I use is accustic laybrinth speaker box for 15inch

If you like to learn by all means go proto typing but IMO is impossible to chase and get best sound with smaller than 12 inch woofers

PostPosted: 27 Feb 2019, 21:53 

Joined: 26 Oct 2012, 21:00
Posts: 203
Location: ontario canada
closed cell foam polystyrene sheets commonly used for insulation/cladding is inexpensive, easy to cut and assemble and just like it's wood counterpart requires good lateral bracing and general care and attention to assembly to get good results and until extreme spl is attained is a good analog for a wooden box.
there's a thread on an other forum(to remain nameless) dedicated to foamcore, which if your not familiar with is a paper faced foam core material used in craft constuction, most commonly found in buck/dollar stores in 1/4 in thick form. i've used it sometimes doubled (think constrained layers) and 3/4 insulation/cladding with good results.

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