Are you in search of a high-end power amplifier that can take your audio experience to the next level? Then look no further than the Threshold s/350e power amplifier.
But unfortunately, Threshold company said that this product has been discontinued. So if you’d like to get a new one, the best way is pcb reverse engineering. To do this, we can make the original schematic for you basing on an old threshold s/350e power amplifier.
Next, let’s talk about the specifications, features, schematic, performance of the Threshold s/350e power amplifier.
Threshold s/350e Power Amplifier Introduction
The Threshold s/350e power amplifier is a truly exceptional piece of audio equipment. It features a brushed aluminum faceplate and a black anodized aluminum chassis, which gives it a modern and stylish look. The sound performance of the Threshold s/350e power amplifier is simply outstanding. The amplifier has a wide soundstage and excellent imaging, which helps to create a truly immersive audio experience.
Threshold s/350e Features
- Class A/B amplifier topology
- High-current power supply
- Two-channel power amplifier
- Compatible with a wide range of audio sources
- Excellent transient response and sound quality
- Balanced and unbalanced inputs
- Selectable gain levels
- Adjustable bias controls
- Modular design, easy to service and upgrade
- Soft-start circuit and long the life
- Robust and durable chassis
- High-quality components
- Well-designed circuit layout
- Balanced XLR and RCA inputs
- DC protection, thermal protection, and overload protection
Threshold s/350e Specifications
| Specification | Value |
|---|---|
| Manufacturer | Threshold Audio, Inc. |
| Power Output | 150 watts per channel into 8 ohms, 300 watts per channel into 4 ohms |
| Amplifier Topology | Class A/B |
| Input Impedance (RCA) | 50k Ohm |
| Input Impedance (XLR) | 600 Ohm |
| Signal-to-Noise Ratio (SNR) | > 110dB |
| Frequency Response | 20Hz - 20kHz (+/- 0.1dB) |
| THD+N | < 0.1% at full power |
| Input Sensitivity | 2.8V for full output |
| Power Consumption | Idle: 200W, Maximum: 2200W |
| Dimensions (WxHxD) | 19″ W x 8.75″ H x 13.25″ D |
| Weight | 54 lbs. (25 kg) |
Threshold s/350e Schematic Service
As we said at the beginning, this Threshold s/350e power amplifier has been discontinued. So if you need the schematic, we can help you. Just contact us by filling in a simple requirement table on the right.
Threshold s/350e Pros and Cons
Like any piece of audio equipment, the Threshold s/350e power amplifier has its pros and cons. Some of the pros of this amplifier include its exceptional sound quality, its sleek and sophisticated design, and its ability to drive a wide range of speakers. It also has a relatively low price point compared to other high-end amplifiers.
Some of the cons of the Threshold s/350e power amplifier include its weight, which may make it difficult to move around, and its lack of built-in features like a DAC or a preamp. It also has a relatively high power consumption, which may be a concern for some users.
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Engineering checks for Threshold S/350e power amplifier repair
Before using Threshold S/350e power amplifier repair in a PCB, firmware, repair, or validation workflow, confirm the details that usually decide whether the design works reliably instead of only reading the headline specification.
Design and troubleshooting checklist
| Area | What to check | Why it matters |
|---|---|---|
| Power rails | Measure transformer output, rectifier drops, filter capacitor ESR, and rail symmetry | Uneven rails can bias the output stage incorrectly |
| Bias and output stage | Check idle current, thermal tracking, emitter resistors, and output transistor matching | Small bias errors can become audible distortion or overheating |
| Signal tracing | Inject a low-level sine wave and compare pre-driver, driver, and speaker output nodes | Stage-by-stage testing separates PCB faults from component failures |
These checks help connect the search intent around Threshold S/350e schematic with practical board-level decisions, component selection, and failure analysis.
