Guitar isolator box1/23/2024 ![]() The Mesa cab was a tight fit, and when the box was closed the sound level reduced to about the same as if you were standing next to the bare amp wearing form-fit ear plugs - that's to say, a lot! Mid‑range frequency SPL reductions are stated as: at 1kHz, 36dB at 2kHz, 40dB and at 4kHz, 42dB of attenuation. We wanted to attenuate the sound level of a Mesa closed‑back, 2x12 cabinet powered by a Mesa Electra Dyne head. The Amp Box was placed out in the studio as if during a tracking session, as is usually the situation when this is used at the studio. ![]() I tested the Amp 4040V 'Large Amp Box' at Gary Belz' House Of Blues Studios in Encino, California, along with chief engineer Doug Tyos and guitarist Bill McBee. The optional 'exhaust pipes' allow heat from the amp to be removed from the enclosure without compromising the degree of isolation. ![]() VocalBooth also make a product called the Speaker Box, which has no ventilation but comes in the same sizes as the Amp Boxes (and at lower prices). As an option, you can order additional half‑inch layers of MDF or buy a dual enclosure - basically a box within a box. The Amp Box's panels are made using ¾‑inch OSB (oriented strand board) and covered in heavy exterior fabric. There's a vent silencer upgrade option if the ventilation system's slight noise is an issue - although it was not in our tests. To rid the interior of the heat build-up from an enclosed guitar amp, the standard ventilation consists of an air-intake labyrinth and a short length of five‑inch vent tubing with a fan attached at the end. The Amp Box has a convoluted, foam‑lined interior, a cable port and enough extra interior space for a mic and stand. The base has an insulating foam layer on its bottom, which prevents sound vibration created inside the box travelling into the floor (important if you have a neighbour living below you), or loud sounds entering the box through the floor, as in the case of an adjacent drum kit. The Amp Box is basically a cube in which the sides and top are held securely together with Velcro straps in locking housings, or channels machined into a base plate. If you live in a shared‑wall apartment or just want to crank up in the same room as your studio setup, an amp enclosure such as this can allow you to capture your favourite tone(s) without breaking your ears - or the terms of your lease! VocalBooth's Amp Box is a portable amplifier enclosure for sonically isolating guitar amps or cabinets so that they can be played at loud enough volumes to create natural-sounding distortion and overdrive. ![]() Isolating your guitar cabinet allows you to crank up your amp on recording sessions - but without deafening the neighbours! ![]()
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