SUB ZERO SOUND
Sound Systems, Mobile Apps
Location: North of Dallas, Texas, including
The Ice Box has several super cool controls that no other mic preamp has:
the COOLER, BOILER and PRESENCE.
The Ice Box uses a minimalist circuit design which follows the straight wire with gain approach and avoids integrated circuits entirely. Fast transient response is maintained by eliminating the feedback circuits universally used in integrated circuit designs. The vacuum tube is the optimal transducer interface as it captures the wide dynamic range from microphones, or instruments, in the most musical way. Microphones and guitar pickups are transducers, which transform sound or motion energy into electrical energy. Transducers typically have a low level output which needs to be amplified to line levels for mixing or recording purposes. This preamplifier amplifies the low level signals cleanly, while gracefully handling the enormous dynamic peaks characteristic of microphones and pickups in the hands (or throats) of real performers. Since the input stage is a vacuum tube, standard microphones take on a tube mic flavor. This circuit has retro written all over it and celebrates the vintage sound.
Pushing the tube a little produces a wonderful sound quality. It is the holy grail of both live sound and recording engineers. Many, unfortunately, use mixing console channel strip preamps along with various processors in an attempt to sweeten the sound. The fortunate few have already discovered there is no substitute for the vacuum tube transducer interface of old that this circuit embodies.
Boiler Off - sine wave
Boiler On - notice notch
Ice Box with Output and Photon Cooler Meters
Articles on Acoustics:
Acoustical fundamentals read
Acoustical parameters of concert halls applied to small rooms read
Acoustical perspectives of standing waves read
How good are your speakers?:
MP3 Test Tone Files (900KB)
Ice Box Gain Stage Design:
Patent 6,737,915 view
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