If your amplifier is rated to a minimum of 4ohms then you can have the following combination of cabs:

• 1×8 ohm cabinet
• 2×8 ohm cabinets 
• 1×4 ohm cabinet

If your amplifier is rated to a minimum of 2.67 ohms then you can have the following combination of cabs: 

• 1×8 ohm cabinet
• 2×8 ohm cabinets 
• 3×8 ohm cabinets
• 1×4 ohm cabinet
• 1×4 ohm and 1x 8ohm cabinet

If your amplifier is rated to a minimum of 2 ohms then you can have any of the above combinations of cabs as well as:

• 2×4 ohm cabinets.

The power rating of a cabinet does not need to match the power output rating of your amplifier. That is because you can only generate the maximum output when you are playing the amp as loud as it can go. The reality is most of the time, you will not be playing that loud. Use your ears to prevent damage to your cabinet. If the speakers sound fart-y and out of control, turn down until the sound is coherent.

You can’t go wrong with either of these amps or pedals. Both have lots of flexibility, but they have overall different characteristics. 

The Tone Hammer is an amp that is always warm and tube-like.  

The AG has tons of clean headroom and feels big and open. 

Set flat, the AG is clean in all settings, while the Tone Hammer always has some harmonic distortion as part of its sonic footprint.

The DB cabinets are rear-ported and are made of 13-ply Baltic Birch. The cabinets are ‘tuned’ differently, and they have a more pronounced and focused midrange response which is about at the same level as the bass response. These sit very nicely in the mix with other instruments and have a vocal, low-mid response. The DB will be slightly forward in the mids, when compared with the SL. The SL’s have extended low end, and smooth highs and a neutral midrange character. This a great option if you are looking for a more neutral cabinet that can be flexible in multiple musical scenarios. 

All Aguilar pickups are passive, and can be used with or without a preamp.

All Aguilar pickups can be used with or without a preamp.

You can connect the cabinet to the head using a speakon. The speak-on connection makes a much better connection for a high-powered amp.  Older iterations of our cabinets have a combination of both ¼ jacks and speakon. 

The connections on the back of the cabinet are all parallel input/outputs. So…

1. You can connect two cabinets individually to the head using either the speakon or the ¼” jacks. The speak-on connection is a very secure connection, so that should be your first choice.
2. Or, you can connect one cabinet to the head and daisy chain the second cabinet.  This means to run a speaker cable from any available jack on the cabinet into the next cabinet. The amp “sees” the speaker in exactly the same way as two outputs from the head.

All our pickups are wound and assembled at our factory in NY.

All of are cabinets are manufactured in the USA, using Custom USA-made Emminence speakers.

All our heads are assembled, inspected and QC’ed at our factory in NY.

We do not make any custom pickups. All our pickups are engineered from the ground-up to sound great and changing one variable changes everything. 

For our 9v pedals, any power supply that provides 9v at 100ma will power the pedal appropriately. For our Tone Hammer and AG Preamp using an 18v-20v power supply with a minimum of 20ma will be sufficient. 2.1mm Barrel Connector – center negative.

Across all of our push buttons, when there are two labels placed around one switch (top and bottom), the top one signifies the function when the switch is pushed in and the bottom when it is pushed out.

All warranty service and repairs are done through Korg USA and their service center network. 

If your product is outside of warranty or the issue you are having was not a result of a manufacturing defect, you can contact Korg USA at support@korgusa.com

If your product is currently in production and not a legacy product, please contact support@korgusa.com for assistance.

You can use the TH 350, TH 500, TH700, AG 500, AG 700 and DB 751 and DB 750 without a cabinet.

The DB 359 and DB 728 require a load, so they must be used with a cabinet to prevent damage.

You could plug the output of your preamp into the effects return to use the TH as a lightweight power amp. Alternatively, if you wanted to use the head as a preamp, you could use the effects send into a power amp. 

The fans on our amplifiers are controlled a thermal sensor, which will switch them on and regulate their speed as needed.

With the level potentiometer set in the center, the response is flat, i.e. there is no boost or cut. Therefore, with level in the center, adjusting the frequency won’t have any effect on the sound.

With level turned up or down, the frequency will be cut or boosted. (depending on the position of the potentiometer) The amount of cut or boost varies depending on the control.

The boost/cut is applied as a bell-shaped curve, centered around the frequency set by the frequency knob. The frequency varies linearly with the knob rotation, i.e. the frequency will be in the middle of the range when the knob is in the middle, one quarter up when the knob is one quarter up, one quarter down when the knob is one quarter down, etc.

The AGS (or Adaptive Gain Shaping) is introduced into in the signal in two places. First, in the gain stage, and second as a filter. The filter rolls off highs and lows, and provides a boost through the mids, like how a good drive pedal is designed. The AGS function on the pedal is similar to turning up the drive on the TH head.

Generally, this a good way to ground the cavity of your bass. 

Ground the backs of all the pots. To do this, connect a bus wire across the backs of all the pots and run the end to the sleeve terminal of the jack.

Connect the shields and ground wires from the pickups to a common ground point. To do this, connect the shields and grounds from the pickups to the backs of the volume or blend pots, or to the bus wire.

Ground the bridge of the bass by soldering to the common ground point.