Q: Where is the fuse of the ALTO TS315 located and how do I replace it?

The fuse of the ALTO TS315 is located at the AC power input , near the power cable. The appropriate fuse rating is printed directly under the power input of the device. To replace the fuse: Locate the tab at the power input Lift this tab to access the fuse Note the rating printed on the device Insert a new fuse of the same rating Important: Using an inappropriate fuse rating could damage the device. Always check the rating before replacing the fuse.

Question 1

Which application or control should be used to adjust the equalizer of the ALTO TX308 speaker?

Accepted Answer

The ALTO TX308 speaker does not have a built-in equalizer or onboard tone controls. The only available controls are a volume knob and a power switch.

To adjust the frequency balance (bass, midrange, treble) with the TX308, you need to use the equalization controls of your audio source:

The equalizer of your mixer or preamplifier
The EQ controls of your audio interface
The music playback application on your device (smartphone, computer)
The settings of the audio processor or effect connected upstream

Note: Higher models in the ALTO series (TX312 and TX315) include a Contour switch that enhances bass and treble, but this feature is not available on the TX308. It is an entry-level model designed for simple and direct amplification.

Question 2

How can I improve the clarity of the vocals on my ALTO TX308 speaker?

Accepted Answer

If you are having trouble hearing the vocals with your ALTO TX308 speaker, the issue usually stems from a sound imbalance where the bass dominates. Here’s how to optimize audio clarity:

Check the input level

Make sure to use the correct volume band. The TX308 has a volume knob with two reference bands:

External band (Line): use it for mixer/CD/MP3 sources. The level should not exceed 0 dB.
Internal band (Mic): for microphones and instruments.

An overdriven source can create distortion that masks the highs (vocals). Ensure that your input signal is not too high.

Be mindful of the dynamic limiter

Your TX308 has a dynamics peak limiter that automatically activates during excessive sound peaks. Check the Signal Limit LED indicator:

Green: normal operation
Red: the limiter is active, which may affect the clarity of high sounds (vocals)

If the indicator is frequently red, reduce the input level at the source (mixer, audio player, etc.).

Placement and ventilation

Ensure that your speaker is placed stably (on a stand or on the floor) and that the ventilation ports remain clear. Poor ventilation can affect the amplifier's performance and overall audio reproduction.

Question 3

Where is the fuse of the ALTO TS315 located and how do I replace it?

Accepted Answer

The fuse of the ALTO TS315 is located at the AC power input, near the power cable. The appropriate fuse rating is printed directly under the power input of the device.

To replace the fuse:

Locate the tab at the power input
Lift this tab to access the fuse
Note the rating printed on the device
Insert a new fuse of the same rating

Important: Using an inappropriate fuse rating could damage the device. Always check the rating before replacing the fuse.

Question 4

How to connect a jack plug to an ALTO TX308 speaker?

Accepted Answer

The Alto TX308 speaker does not have a 6.35 mm jack input, but rather a balanced XLR input on its rear panel. Here’s how to connect your audio source to the TX308:

Preparation before connection: Before plugging in your source device, set the TX308 Volume knob to minimum (turn the knob completely counterclockwise). This step is essential to avoid sound spikes and potential damage to the speaker.

Connection via XLR input: Use a standard XLR cable (not provided) to connect your audio source to the XLR input of the TX308. The other end of the cable connects to your source device (mixer, CD/MP3 player, audio preamplifier, etc.). Firmly insert the XLR plug until it clicks into place.

Volume adjustment: The TX308 accepts both line level sources (mixer, CD/MP3 player, preamp) and microphone level sources (microphones, instruments). Follow the volume indicator strip: use the outer strip for line level sources (you generally should not exceed 0 dB), and the inner strip for microphones (you can use the entire range of the knob). Gradually increase the volume while observing the Signal Limit LED indicator on the back of the speaker.

Be cautious of strong signals: If the Signal Limit indicator lights up red continuously or if the sound is distorted, do not increase the volume further. This could damage the TX308. Instead, reduce the signal level at the source or slightly lower the Volume knob on the speaker.

Alternative for jack connection: If your audio source only has a 3.5 mm or 6.35 mm jack output, you will need to use a jack to XLR adapter cable (sold separately). This adapter will convert the signal from your source device to make it compatible with the XLR input of the TX308.

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