With oddball characteristics and output power ratings of 25 watts or less, First Watt is not for most people. If you have efficient loudspeakers, listen at reasonable levels and are obsessed about subjective performance, then you probably have come to the right place.

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All of the above can have a significant social and economic impact on both individuals and communities. Additionally, they can cause severe environmental repercussions (e.g., habitat destruction and ground/groundwater contamination).

Flooding can occur for a number of reasons in both coastal and non-coastal areas. Some of the most prevalent causes are:

Originally created almost 6 years ago, the F8 is a stereo two-stage single-ended Class A amplifier using the NOS Toshiba 2SJ74 P channel Jfets and SemiSouth R100 SiC power Jfets for signal gain, plus IRFP240 Mosfet mu-follower current sources, for a total of three devices per channel.

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While floods can cause significant damage, destruction, and devastation, it is possible to mitigate these consequences by being prepared. Monitoring and collecting data about water levels in flood-prone areas can help the necessary parties prepare for and, potentially, prevent floods and flood-related problems. Ultrasonic sensors play a vital role in the systems used for these purposes, which makes them important to flood preparedness.

First Watt amplifiers are routinely compared with tube amplifiers, although I make a point that they are not designed to mimic tubes as such. These amplifiers share some of the characteristics of the better tube products in that they have simple circuits with minimal or no feedback and emphasize performance of individual gain devices. In some ways they are better than tubes, in other ways perhaps not.

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If you want reliable audio product, then you really have come to the right place. For twelve years First Watt has had a near-zero failure rate.

The SIT-4 is the First Watt power amplifier using the industrial grade Static Induction Transistors.  It is preceded by the ground breaking SIT-1, 2, and 3 and follows their technical philosophy and construction.

Floods can have a variety of consequences depending on where they strike, how long they last, how much water is involved, what preparations were made beforehand, and many other factors. The most extreme negative consequence that can happen is the loss of human life. However, floods can also cause the following:

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With the new releases of the SIT-1, SIT-2, B2 and B4, the total is now up to sixteen designs released, all simple Class A circuits, each offering a unique approach to sonic quality. The F1 and F2 are both current source (as opposed to voltage source) amplifiers with no feedback. The F3 offers single-stage single-ended operation with new Jfet power transistors. The F4 is a push-pull current buffer with no voltage gain or feedback, and the F5 is a uniquely high performance push-pull amplifier with feedback. The J2 and M2 continue to push the envelope in unique ways.

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There is no such thing as a perfect amplifier. All audiophiles and their associated equipment have specific needs, but in each case there is such a thing as a best amplifier – the one that makes you happy.

Small amplifiers have a number of advantages over “big iron” in that very high quality can be achieved with simple Class A circuits using little or no feedback.

The ultrasonic sensors at Senix find use in flood monitoring and forecast systems around the world, from Virginia to Vietnam to Australia. The ToughSonic sensor line features waterproof construction with an IP68 rating, and offers reliable performance even in the face of the toughest weather conditions or passing waves. The data the sensors collect can be transmitted wirelessly to a centralized data management system using AirWire LoRa (the Senix solution for wireless sensor monitoring) or another similar software solution. This makes them ideal for use in smart cities looking to establish or upgrade their disaster preparedness plans.

First Watt exists because I wanted to explore a variety of amplifier designs in what I think of as neglected areas – amplifiers that might not fit into the mainstream and are probably not appropriate to my more commercial enterprise, Pass Labs.

Ultrasonic sensors are a vital component of modern flood detection and alert systems. As they utilize high-frequency (ultrasonic) soundwaves to calculate the distance to a remote object without physically touching it, they can be used to create systems that reliably determine wave height and water levels at much lower installation and maintenance costs.

The key to minimizing or mitigating flood damage is being prepared. Flood monitoring and warning systems are essential to this strategy as they collect data about flood-prone areas and provide predictions on when, where, and how a flood may strike. This information helps response personnel establish a more effective preparation plan.

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Need ultrasonic sensors for your flood monitoring and alert system? Turn to the experts at Senix. Our ToughSonic sensors have a proven track record in flood monitoring and forecast systems across the globe. For more information on our ultrasonic sensors, contact us today.

Dick Olsher famously remarked that “The first watt is the most important watt.” This sentiment has also been expressed by others as “Who cares what an amplifier sounds like at 500 watts if it sounds like crap at one watt?” With this in mind, I created First Watt in 1998 as a “kitchen-table” effort, exploring unusual low power amplifiers with an emphasis on sound quality.

Everybody gets a reply, but the volume is high and it might take a while, especially if I’m at the beach. If you don’t get a response within 2 weeks, send it again.

The F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET topology with fewer parts than any First Watt amplifier to date and incorporating a very interesting balance of very low negative voltage feedback and a little bit of positive current feedback to give an astonishing measure of control over reactive loudspeaker loads.

Natural disasters can happen anywhere in the world, and, in recent years, they have occurred with greater frequency. One of the most common types of natural disasters is floods. Due to the devastation, they can reign on a community, region, or, in the event of large-scale flooding, country, it is important to be properly prepared to handle them before they occur. That’s why many environmentally focused organizations and groups have invested in flood detection systems that implement ultrasonic sensors.