Setting Up Krk Subwoofers With Studio Monitors: A Guide

Setting up a KRK subwoofer with your monitors can be a tricky task, especially if you're doing it for the first time. The process involves connecting the correct cables, adjusting the subwoofer and monitor settings, and finding the right balance between the low frequencies from the subwoofer and the mid/high frequencies from the monitors. While the exact steps may vary depending on the specific models of KRK subwoofer and monitors you have, online communities and forums can be a great resource for troubleshooting and advice.

Connecting KRK sub to RCA inputs

Connecting a KRK subwoofer to RCA inputs can be done in a few different ways, depending on the specific equipment you have. Here is a step-by-step guide on how to connect your KRK sub to RCA inputs:

Firstly, identify the inputs and outputs on your KRK subwoofer and the devices you want to connect it to. The KRK subwoofer should have RCA inputs and outputs, which are usually colour-coded (red and white) or labelled as "RCA". Similarly, identify the RCA inputs on your monitors or other devices you want to connect to.

If you are connecting the KRK sub to a pair of active monitors, you can use RCA cables to connect the subwoofer to the monitors. Connect the RCA output on the subwoofer to the RCA input on the active monitors. This is a straightforward process and should get your system up and running.

However, if you are connecting the KRK sub to a passive system or to a device with different input types, you may need to use different cables or adapters. For example, if your monitors have a 3.5mm input, you can use a 3.5mm-to-RCA adapter to connect the subwoofer. Alternatively, you may need to use a Y-cable with a single RCA male plug on one side and two female connectors on the other. Chop off the female connectors, leaving you with 'bare speaker wire', and connect this to the input/output of the subwoofer. Then, connect the RCA male connectors to the TRS balanced input on your device using an RCA-to-6.2mm jack converter.

Another option, if you are connecting to a passive system, is to use a power amplifier. Connect your sound card to a power amplifier using a phono RCA lead, and then connect the power amplifier to the subwoofer using speaker wire. This setup will allow you to mirror the outputs from your sound card so that the same audio signal is sent to both your monitors and the subwoofer.

It is important to note that when using RCA connections, there is an increased possibility of creating ground loops, which can result in added noise or hum in your audio signal. This is especially true if you are using RCA switches or connecting multiple sources and speakers. If you experience noise issues, you may need to disconnect part of your setup or consult an audio professional for further advice.

Setting up KRK sub volume

Setting up the KRK sub volume involves several steps and considerations. Firstly, it is important to ensure that the subwoofer is properly connected to the studio monitors using the appropriate cables, such as RCA, XLR, or TRS cables. The specific cable connections will depend on the input and output options available on your KRK subwoofer and monitors.

Once the connections are made, you can adjust the subwoofer volume to achieve the desired sound. It is recommended to set the volume based on creating an even balance across all frequencies. This can be done by playing commercial tracks with familiar sounds and adjusting the subwoofer volume to match. It is important not to overdo the bass, as you want to achieve a balanced sound across all frequencies.

The KRK subwoofer may have a system volume knob or adjustment knob that allows you to increase or decrease the volume. Refer to your KRK subwoofer's manual to locate the exact volume control and its range of adjustment.

Additionally, consider the placement of your subwoofer and monitors. While the subwoofer can be placed between the monitors, it doesn't have to be, as very low frequencies are non-directional. You can try placing the subwoofer in different positions, such as behind or to the side of your desk, to find the optimal setup for your listening position.

Fine-tuning the volume and placement of your KRK subwoofer may require some experimentation. You can use an audio file that sweeps from 20Hz to 20kHz and a sound pressure level (SPL) meter to match the peak dB readings and adjust the subwoofer volume accordingly. This process will help you calibrate the subwoofer with your studio monitors for a cohesive listening experience.

Using KRK sub with active monitors

Setting up a KRK subwoofer with active monitors is a straightforward process. To start, you'll need to connect a pair of cables from your audio source to the left and right RCA, XLR, or TRS subwoofer inputs on the KRK subwoofer. Then, connect the corresponding output jacks on the subwoofer to the inputs of your active studio monitors.

If you're using active monitors, it's important to use an XLR or TRS cable to connect the output of the subwoofer directly to the input of the monitor. This ensures a balanced connection and optimal sound quality. The RCA output on the KRK subwoofer is also an option, but it's important to note that it may not have the same high-pass filter applied as the XLR and TRS connections.

When setting up your KRK subwoofer with active monitors, it's recommended to set the HPF (high-pass filter) to 80 Hz. This will ensure that the low-end frequencies are directed to the subwoofer while allowing the mid and high frequencies to come through the active monitors clearly. Play the high-frequency pink noise and adjust the volume on the monitors until they reach 85 dB on your SPL meter or app.

After calibrating the monitors, it's time to adjust the subwoofer volume. Play the low-band pink noise and adjust the subwoofer volume until it also reaches 85 dB on your meter. This will ensure that the low frequencies from the subwoofer and the mid/high frequencies from the monitors are properly balanced.

With these steps, you'll be able to enjoy the tight, accurate, and defined bass response that KRK subwoofers are known for, while also experiencing clear and detailed mid and high frequencies from your active monitors.

KRK sub and monitor troubleshooting

If you're having issues with your KRK sub and monitors, there are several troubleshooting steps you can take to try and resolve the problem.

Firstly, check the power. Ensure that the power cord is plugged into both the IEC socket on the rear panel of the active speaker and the AC mains. Check that the AC mains are active, and if they are controlled by a light switch or power strip, make sure it's in the 'on' position. Verify that the power switch on the active speaker is also on. Check the AC mains voltage and ensure it matches the correct operating voltage requirements. If the AC mains voltage is higher than the selected voltage, the fuse may need replacing.

If the power light is not illuminated, turn the power switch off and check the A/C mains fuse(s). The fuse is located directly below the power receptacle. Refer to your user guide for more information. Do not use a larger ampage fuse than is specified. After replacing the fuse, turn the power switch back on and see if the power light illuminates. If a fuse change was needed and the monitor's fuse blows again, the unit will need to be returned to the dealer or KRK for servicing.

If your KRK Rokit is not powering up, it could be due to a blown fuse. Underneath the power cable socket is a fuse holder with two fuses, one of which is a spare. Remove the holder and check if the fuse is blown (it will likely look burnt). Replace it with the spare fuse and your speaker should power on normally. If the fuse blows again, you will need to send your unit in for servicing.

If you continue to experience issues, contact KRK's technical support department or your local dealer for further assistance.

KRK sub and monitor calibration

Setting up a KRK sub and monitor requires a few steps to ensure optimal sound quality and performance. Here is a detailed guide on calibrating your KRK sub and monitors:

Step 1: Connect the Subwoofer and Monitors

Firstly, physically connect your KRK subwoofer to your monitors. The KRK subwoofer should have a dedicated subwoofer output, which you can use to connect to the left and right inputs on your monitors. This will allow the subwoofer to work in tandem with the monitors.

Step 2: Set the Crossover Frequency

Set the crossover frequency on your subwoofer to the recommended setting. The crossover frequency determines where the transition between the subwoofer and monitors will occur. For KRK, this is typically set to around 80 Hz. This will ensure that the subwoofer handles the low frequencies, while the monitors handle the mid and high frequencies.

Step 3: Adjust Subwoofer Volume

Using a sound meter or app, play a low-frequency test tone or pink noise through the subwoofer. Adjust the subwoofer volume until it reaches the desired level, typically around 85 dB. This will ensure the subwoofer is neither too loud nor too quiet compared to the monitors.

Step 4: Calibrate Monitor Volume

Now, play a high-frequency test tone or pink noise through the monitors and adjust their volume until they also reach the desired level of 85 dB. This will ensure the mid and high frequencies are balanced with the subwoofer's output.

Step 5: Fine-Tune with HF and LF Knobs

If your KRK monitors have High-Frequency (HF) and Low-Frequency (LF) knobs, you may need to adjust these to fine-tune the sound. These knobs allow you to boost or cut the high and low frequencies, respectively, to better match the output of the subwoofer.

Step 6: Test with Music

Finally, play some music through your setup and make any final adjustments to the subwoofer and monitor volumes, as well as the HF and LF knobs, to get the sound that "feels" right to your ears. Trust your ears and adjust until you achieve a balanced and immersive sound.

Bonus Step: Use the KRK Ergo Room Correction System

If you want to take your calibration a step further, consider using the KRK Ergo system. This hardware-based room correction system helps optimise your acoustics by correcting frequency-response anomalies and improving stereo imaging. It includes a monitor controller and audio interface, allowing you to fine-tune your setup even further. The calibration process involves placing a supplied microphone at your listening position and running the Ergo Cal software to measure and adjust the sound to compensate for any room deficiencies.

Frequently asked questions