Testing two Neotec headphone Amplifiers

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 Neoteck 059 vs 106 Blueooth 

 

 

It has been over four years since I purchased the NTK 059 from Amazon. I bought it with the intention of enhancing my experience while watching TV shows and movies, as well as listening to music.

However, I have only used it less than ten times, totaling less than 20 hours. The reason for discontinuing use of the product was due to changes in my daily schedule, which involved frequent travel between my own home and my parents' home to care for them.

Despite this, I was pleased with the product's excellent sound quality, even when used in conjunction with a somewhat unconventional setup, which included an RF bypass for TV via

-RF bypass for TV via a Digital decoder
-TV connecting with a DVD recorder jus tin case..
-DVD recorder connects to a HiFi [lol] system
-The spare RCA outputs from the DTV were used to connect to the headphone amplifier via a provided cable. The output of the amplifier was then connected to a 5m 3.9mm cable extension to reach the AKG77 headphones on the other side of the salon (5.5+m).

Why do I refer to the Hifi? This is a pre-2000 all-in-one model with 3 CD, 2 cassette, and radio player, plus two mid-level speakers offered with the model, with sound quality inferior to these headphones. There are a few DSP modes for equalization that enhance the sound quality, but they still do not offer the good audio that these headphones offer!

Most times, I used it to watch musical programs from 3 TV stations on the weekends.  The best sound among them was on ERT, the Greek national TV network. The second station produced a sharper and more sibilant sound compared to the third station, which was considered to have lower quality sound.  The text is free from filler words and employs a formal register with precise word choice. Listening to ERT provided the best experience, with all instruments being heard clearly, although the drums had a slightly sharp sound.

The cable was consistently connected to the DTV receiver, while the amplifier was only used when necessary.

pack 106 

Looking here the bigger model HD106 Each model  has the same packing with these accessories included :   

- A 3,9 mm jumper  with one end 90d angled
-mini USB cable. Mini D  plug is used.
-Mini guide All these are put in the same part of the box. Rather not to be used as the  amp is very simple to be used. I have seen a video in the Ali page on how the BT can communicate
-the amplifier in the other part of the pack 

Both amplifiers have a similar design and controls, with slight differences in operation. The volume knob in the BT model controls the volume and acts as a switch, while in the non-BT model (NTK059), the middle switch functions as the power on/off button. In the NTK160 model, the middle switch acts as the volume gain control.

To activate the Bluetooth mode, simply turn on the NTK160 without plugging any cables into the input socket and activate the BT mode on your device. Both the computer and smartphone paired with the amplifier immediately.

Upon checking the fidelity, I noticed that the Digital TV decoder had a higher treble than expected. Once I plugged the amp with the SCART, I noticed a different audio signature with lower highs. I also tested the NTK 059 with a smartphone and found that the audio quality was poor and similar to the direct audio. Therefore, the NTK 059 appears to be transparent to my ears.

I chose to use a new Nintaus model. The Amoi model has a sibilant sound with less bass and slightly higher trebles in the 1.5-5 KHz range, making it uncomfortable for extended use to my ears .

After experimenting with the same song, which has both treble and bass, I found that the Nintaus model produced slightly more bass at the 1.5-2 db level while maintaining
the same overall sound quality. I also observed that the plug on the 160 cable was slightly larger, requiring more pressure to fit securely.

 

I opted for the utilization of a novel Nintaus model. The Amoi model exhibits a pronounced sibilant sound characterized by reduced bass and slightly elevated trebles within the frequency range of 1.5-5 KHz, causing discomfort during prolonged usage as perceived by my ears.

The aforementioned illustrates the disparities between employing a direct connection and utilizing the 106 as an amplifier. Extremely low frequencies are effectively amplified.

Contrary to my previous experience, I noticed that the 106 shows a more pronounced bass sound, as indicated by the left portion of each spectrum analysis, with some increased presence in the middle and higher frequencies.

JBL T501 BT and comapring with the T500 model

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The model was purchased with the aim of using a BT model in the city shack where I conduct most of my audio work, including Dxing, cross-testing audio equipment, and experimenting with antennas and wires to achieve the clearest possible radio reception in town, particularly for shortwaves and LMF. Additionally, it involves printing Dx and other related internet material at the lowest possible cost compared to the roughly double cost in the village.

This Bluetooth model is used mostly to remotely adjust the loop antennas for the lowest noise. The author mentions using it to remotely listen into shortwaves etc while assisting his elderly mother. Additionally, this Bluetooth model is used in part to remotely adjust the loop antennas for the lowest noise.

 

The BT500 and T501 have an identical design, with the only difference that the T500 is cabled while the other model includes a USB C socket for charging and a control panel . Unlike the other tested models, this model utilizes a separate button to initiate or terminate Bluetooth connectivity. When connected to either a PC or smartphone, it is identified as 'JBL Tune 510 BT'.

 

 

After conducting a sound comparison between the T500 and the newer 501BT, it was found that the sound level of the T500 is 14 steps higher when set to level 50. This equates to roughly a 10db difference. However, the T500 has higher bass while the 501BT has lower bass and slightly higher treble, resulting in a more 'linear' sound.  

When testing the audio quality between a smartphone and a laptop on the same channel, the sound is nearly identical.

Hope later to conduct the final test by using a tone generator file fo better crosstesting between both models

 

HOco E73 Pro min BT trasnmistter

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This transmitter receiver is one of the most affordable options in the local market, priced at only 13 Euros. I ordered two pieces over a month ago. Other models are available in the market starting from 20 Euros, but I was pleased to find the lowest price in Southern Greece. Payment was made in cash upon delivery,

and the model was received within two days. The first one was checked and found to be working well, except for some blinking during operation, which is normal. The problem was identified clearly.

The second model worked without any issues and was promptly returned. The staff were helpful in checking and sending the remaining model back home in less than a week, despite the fact that I received it two weeks later.

This type of transmitter is ideal for use with gear that does not include Bluetooth. I own several mini gear items, including shortwave radios and MP3 players.

The operation of this item is simple: press the TX RX switch to enter transmit mode and connect the AUX plug using the provided double nipple plug or the cable jumper included in the box. It may be challenging to find a nipple of this quality on eBay, except for some in black rubber at half the price.

To connect to a mini amplifier or headphones without Bluetooth, switch to RX mode and use the provided cable.

Please refer to the photo below for an example of how to connect the transmitter to a shortwave radio using the same 3.5mm jack as shown above.

 

I have several shortwave receivers and a few non-Bluetooth MP3 players that need attention. Specifically, I have a Tecsun shortwave and FM radio. I have used Bluetooth with a 3.5mm jack, which works well with wired headphones such as the JBL T500. I also tried the JBL 510, which is the Bluetooth equivalent of the T500, and found that the sound quality was even better.

 

Here is the second example. I used an older 3.9mm stock jumper cable to connect both the Nintaus MP3 player and the transmitter. The sound is good and slightly flatter than when using the T500.

In terms of distance, I tested the radio indoors while listening with the BT510 headphones  the VT counterpart of the T500 headphones . The reception is clear and uninterrupted in most rooms, except for those separated by three thin walls. The coverage distance is approximately 11 meters.