11/19/2022 0 Comments Dm1 dynamite![]() And the frequency response is specified flat to within 0.3 dB from 10 Hz to 120 kHz! So, what did I find? They also claim Dynamite is very quiet, “ high-grade FETs provide supremely low noise” and in fact the cleverly designed storage box for the device (a red stick of dynamite!) states “DANGEROUSLY low noise design”. They do, however, suggest a preamp with an input impedance of at least 1k Ohm, but my tests found even 300 Ohms didn’t reduce the gain noticeably. Furthermore sE indicate the output impedance is very low so that the input impedance of the preamp following the Dynamite will not affect this gain significantly. In other words, a mic that generates 2.8 mV at a given sound level (such as the ubiquitous SM58) will be boosted to 70 mV. The Dynamite specs indicate a gain of 28 dB which is a voltage factor of 25 times. #Dm1 dynamite full#The preamp is best attached directly to a mic so that the full cable length carries the boosted signal for maximum noise immunity. It is intended to provide a nominal 28 dB of gain to passive dynamic microphones including ribbons. It consumes a modest 3 ma to operate its amp. The Dynamite requires 48 Volt phantom power, but does not send it on to the attached microphone. The finish is excellent, pins are gold plated, mic lock works smoothly, and it feels very solid overall. It weighs less than three ounces (80 grams) and is under four inches (about 96 mm) long. The tubular case is metal and feels rugged enough to drive a truck over it without damage (I didn’t try this, however!). The sE Dynamite Inline Preamp with XLR input and output. I figured the Dynamite might be worth a look and listen even in my electrically quiet studio. My Focusrite interface doesn’t suffer from any measurable noise at the highest gain, and the lowest and highest audio frequencies drop only tenths of a dB at maximum gain, but the gain control is very touchy near the highest gain setting. Even with the very best preamp, any hum and noise picked up by a cable will be amplified, so increasing the mic signal by 28 dB will reduce hum and noise by the same amount. And third, the gain control of many preamps has low resolution in the last 10% or so of the control range, making it difficult to set it near the maximum setting.Īnd anyone needing to feed a dynamic mic signal over a long cable, and possibly in a venue with lots of electrical interference should really benefit if the unit does what it claims. Second, the frequency response of many preamps rolls off at the highest gain setting, dropping up to several dB at 20 Hz and 20 kHz. First, with some “more affordable” preamps the highest setting may bring up considerable analog hiss and digital noise. This can require the preamp to be run near its maximum gain which often creates a few problems. Condenser mics always have an onboard amp/impedance converter, and dynamic mics, including ribbons, with their very low outputs, typically 20-25 dB lower than condenser mics, are usually expected to work directly connected to a preamp. In fact, I thought of building a simple inline module a few years ago, but didn’t get around to it before Cloud Microphones introduced the Cloudlifter, which, when you think of it, is a rather obvious idea. SE Electronics Dynamite - Active Inline PreampĪlthough I haven’t been recording in live venues for years, the idea of a phantom powered preamp for dynamic and ribbon mics in my studio has been tempting. ![]()
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