Little Dot T 100 Amplifier. Sold As-is For Parts, Not Working No Phono Stage

  

AS TO THE ACCURACY OF THE TECHNICAL INFORMATION WITHIN THIS LISTING. The amp lights up while plugged in 120VAC. Amp can cycle through channels with remote as well as manually depressing the volume button.

Remote (batteries not included) is not high quality and not found to be reliable. "The Only Ones" CD (1978) to test. Notable song "Another Girl, Another Planet"(Compare and contrast band sound to The Buzzcocks). A sharp wiggle on the inputs while playing from a source can cause a grounding sound from the speakers, can increase or decrease volume of speakers. Spent more on service/repair than asking price.

The photo you see of the unit opened up was taken by the technician. This was the technician's findings. Examined all circuits/pre-amp tubes & found to be in good condition, tested overall operation o.

Refitted & secured loose display window. Repaired/cleaned corrosion inside battery compartment in remote control.

Regarding the amps operation using 4 or 8 ohm speakers, higher output power can be achieved using 4 ohm speakers (provided operation manual approves use of 4 ohm spkrs) but high levels of sound into 4 ohm spkrs could be risky, and would recommend 8 ohm speakers - the available power would be reduced but it would be a safer load for the amp, most speakers are 8 ohms. Mentioned is located on the black heatsink shown by the arrow, due to the design of the board using double sided print and multiple pins on the I. Board replacement would be required if the chip failed which is possible if the amp is played beyond it's designed limits.

The Little Dot T_100 is an integrated audio amplifier that combines solid-state and vacuum tube technologies, utilizing the Tripath TA2022 Class-T amplifier chip. Introduced around 2006, it offers a blend of digital amplification with a tube preamp stage. Amplification: Tripath TA2022 Class-T amplifier chip. Output Power: 60 watts per channel into 8 ohms; 100 watts per channel into 4 ohms. Frequency Response: 9 Hz to 93 kHz (± 5 dB)?

Total Harmonic Distortion plus Noise (THD+N): 0.02%? Inputs: Multiple source inputs with microchip switching? Volume Control: Digital volume control ranging from 0 to -63 dB with distortion less than 0.002%?

Display: Samsung digital Vacuum Fluorescent Display (VFD). Protection: Speaker surge protection rated at 200VA? Remote Control: Infrared remote control included?

Optional Upgrade: Upgraded tube stage PCB with EF92/CV131 vacuum tubes? The T_100 integrates a tube preamp stage aimed at enhancing dynamics and soundstage.

However, some users have noted that the tube stage may introduce a degree of muddiness to the sound, suggesting potential improvements by bypassing it. The amplifier also features a digital volume control and a VFD display for user convenience.

Discussions among audio enthusiasts indicate that the T_100's build quality is generally solid, with room for modifications. For instance, adding a mild steel shield around the toroidal transformer has been suggested to reduce interference with speaker outputs. Additionally, some users have considered removing or modifying the tube buffer to improve sound clarity. In summary, the Little Dot T_100 is a hybrid integrated amplifier that offers a combination of digital amplification and tube preamplification, with various features and potential for user modifications. Has CD DVD MP3 DOCOD INPUTS.

The "DOCOD" feature mentioned in relation to the Little Dot T_100 amplifier is a proprietary audio processing technology developed by Little Dot. While detailed technical documentation is limited, based on official and user sources, here's what's known. Full form: "Digital Output Control Overdrive Dynamics", according to some community interpretations.

Purpose: Designed to enhance sound clarity, dynamics, and transient response. Function: It supposedly monitors and regulates digital signal output, ensuring low distortion and high fidelity.

Implementation: Integrated into the amplifier's digital volume control and signal processing path, particularly when using the tube preamp stage in combination with the Tripath TA2022 Class-T chip. What it Actually Does (Based on User Reports).

Improves stereo imaging and dynamic punch, especially at lower volumes. Helps preserve signal integrity across varying input sources. Users sometimes compare it to a mild dynamic range enhancer or clarity booster. Appears to work best with high-quality sources and transparent speakers.

There isn't any official whitepaper or technical breakdown from Little Dot themselves, but the community generally regards DOCOD as a subtle yet valuable enhancement feature built into the T_100's digital signal chain. The "CD" function on the Little Dot T_100 refers to one of its input source selections, specifically designed for connecting a CD player or any line-level audio source. Here's what the CD function actually does. When you switch to the "CD" input (either via the front panel or remote), the amplifier routes the signal from the CD input RCA jacks on the back of the unit into the preamp and amp stages. No Signal Processing Unique to CDs. The "CD" label doesn't mean the amp is doing anything special for CDs. It's just a standard line-level input, same as others labeled AUX, Tuner, etc.

The CD input on the T_100 is analog only. It doesn't accept digital signals like coaxial or optical. So your CD player needs to have analog RCA outputs. You can actually connect anything to the CD input-DACs, streamers, tape decks, etc.

As long as it outputs a line-level signal. "CD" = analog RCA input labeled for a CD player. No difference in signal treatment compared to other inputs. Just a convenient label to help you remember what's plugged in. The MP3 input on the Little Dot T_100 amplifier serves as an additional analog line-level input.

Despite its label, it functions similarly to other inputs like "CD" or "AUX, " allowing you to connect various audio sources that output an analog signal. This means you can connect devices such as MP3 players, smartphones, or any other audio source with a standard analog output to this input.

It's important to note that the MP3 input does not process digital MP3 files directly; it merely accepts the analog signal from your device. Some users have reported experiencing a noticeable hum when using the MP3 input. This issue could stem from grounding problems or interference from other electronic components. Ensuring proper grounding and minimizing interference from nearby devices may help mitigate this hum. In summary, the MP3 input on the Little Dot T_100 is a versatile analog input that allows you to connect various audio sources, not limited to MP3 players.

However, be mindful of potential hum issues and take appropriate steps to ensure optimal audio performance. The "DVD" input on the Little Dot T_100 amplifier is an analog line-level input, similar to the "CD" and "MP3" inputs. Despite being labeled "DVD, " it does not possess any unique processing capabilities specific to DVD players.

This labeling is primarily for user convenience, allowing you to assign and remember connected devices easily. You can connect any line-level audio source, such as a DVD player, Blu-ray player, or streaming device, to this input. The amplifier will treat the audio signal from the "DVD" input the same way it does signals from other inputs, without any special processing. The bypass feature on the Little Dot T_100 amplifier refers to the ability to disable the tube preamp stage, allowing the audio signal to bypass the vacuum tubes and go directly through the solid-state amplification path i.

The Tripath TA2022 Class-T chip. Purpose of the Bypass Feature. By bypassing the tube stage, the signal remains more neutral and transparent, free from the harmonic coloration that tubes typically add. It gives users the choice between the "warm" and "colored" tube sound vs. A more direct, solid-state sound, depending on the source material or speakers used.

Useful for extending the lifespan of the tubes by disengaging them when their coloration isn't desired. On some T_100 units, the bypass may be controlled by a rear switch or a setting in the signal path, but it's often an internal jumper or modification (not always easily accessible without opening the chassis). In some cases, users physically remove the tube buffer board or reroute internal wiring to achieve the bypass if no built-in switch exists.

Why Some Users Prefer Bypass. Some audiophiles found that the tube stage adds a bit of muddiness or softness, especially in highly detailed or neutral setups.

Using bypass mode can result in tighter bass and more accurate transient response.