PJB (Phil Jones Bass)

Compact PLUS Combo Amplifier

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To the Continental USA
  • PJB Compact PLUS Combo, Black
  • PJB Compact PLUS Combo, Red
  • PJB Suitcase Compact Combo, top panel
  • PJB Suitcase Compact Combo, back
Our Low Price: $1,249.99

Price shown may adjust with options selected below (if applicable)


We were among the very first dealers to bring Phil Jones amps to the US market, and we've brought them back on board!

Mark's TakeThe "Compact PLUS Combo" is the update to the popular "Suitcase Compact" combo - and it's a surprisingly potent little amp with a very small footprint. I will say, it is a bit "dense" - meaning that it does have a bit of weight, no doubt due to its very sturdy construction and the fact that it contains four powerful small drivers (and their hefty magnets). But it's still quite manageable, and quite easy to carry despite having a bit more mass than you might expect, looking at it.

The tone is massive, especially considering its size. Plenty of heft in the low end if you need it, and the EQs are very usable - just dial in the tone with the easy-to-understand controls and go at it. It puts out plenty of sound and should fill most small to mid-size stages, and features a DI output for sending your signal to the "house" (the main PA board). So it should suit the needs of most players, whether amateur or professional. It also has an external speaker jack for adding a second cabinet, so you can grow as needed, or have a scalable rig for different venues or needs.

Here's the product information as provided by PJB.

Powerful Small Combo

The Compact Plus BG-450 is the pinnacle of PJB’s line of small and light weight powerful compact bass combos. It is the same size as PJB’s C-4 speaker enclosure with a power amplifier that will reach up to 500 Watts with four internal 5” drivers.

The BG-450 contains the latest proprietary PJB chrome dome drivers which are the most efficient five-inch speakers ever engineered by PJB. The result is a perfect pairing of power and driver efficiency that makes it the best sounding 4×5 combo ever made by PJB and, remarkably, with less weight. It has an incredible punchy sound that cuts through air as “a knife through butter” with a solid and powerful low-end response normally associated with a much larger combo.

In the heart of this amp lies a formidable ultra-high-energy power supply using a Class D power amplifier for high efficiency which equals less heat and less weight, and is coupled with a pure Class-A, ultra-low noise pre amp. This combination completes a power section that achieves a massive dynamic range that allows the player to attain the best tone in any playing situation.

The pre-amp design includes a single channel equipped with a variable gain input section that matches precisely with both active and passive basses. It also features a mute switch and the classic PJB 5-band precision EQ system that achieves the broadest range in tones imaginable with just 5 controls. This allows the player to effortlessly locate their perfect tone within seconds.

The send /return FX patch can be blended to the direct signal allowing even more tonal opportunities. A secondary AUX input allows for practicing along with backing tracks via a 1/8” stereo jack. Back panel features include a Line Output jack that allows the BG-450 to be used in slave mode coupled with one or multiple amps, and a line input that provides the ability for an external pre-amp to be connected if desired.

The DI balanced out can be pre or post EQ and offers a ground lift to avoid problematic hum. Speaker output is via a Speakon NL4 socket perfectly matched to run a C4 or C8 cabinet. The amp can run on any AC voltage from 100 volts to 240 volts.

The Compact Plus puts out a punchy 300 watts into its own speakers and up to 500 watts when connected to an external cabinet. The BG-450 at max power will cover a wide variety of playing situations. For environments that demand much higher volume PJB recommends a BP-800 amp with PJB cabinets, or a BG-800 Roadcase as powerful alternatives.

Speaker Driver: 4X5 Inch PJB Driver

A class D amplifier with digital switch-mode power supply.
Power output: 300W internal speakers, 500 Watts with 8ohm external speaker

Signal to Noise Ratio:≥85 dB(A) (EQ off, Volume on Full.)

Passive Input: >2MΩ/22pF
Active Input: >100KΩ/22pF
Line Input: >22KΩ
Pre Amp Line Out: < 2KΩ
Bal. Out: <200Ω

Passive Input: 10mV-1.5V
Active Input: 20mV-4.5V
Line Input:600mV
Pre Amp Line Out: 1.2V
Bal.Out: Typical 500mV

50Hz, 160Hz, 630Hz, 2.5KHz,12KHz at +/- 18dB

Product Size::361(W)x362(H)x336(D)mm
Net Weight: 14 Kg(31 lbs)


Product Manual

Need to figure out some of the more in-depth features of this product? Here's a copy of the manual, in PDF format, here.

You may wish to visit the manufacturer's website to see if a more recent version is available.


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Warranty Information

Warranty Information
PJB amplifiers carry a 2 years limited warranty on parts and labor.

Products must be purchased from an authorized PJB dealer.

Buyer must complete and return the enclosed warranty card within 15 days of purchase, or register online.

This warranty covers defect in materials or workmanship that occurs in normal use. Within warranty period PJB or its local distributor will repair or replace the defect unit free of labor and parts charge. It is the buyer’s responsibility to use the unit strictly according to instructions written in the owner’s manual.

This warranty is not transferable; it is provided to original owner only.

Damage/defects caused by the following conditions are not covered by this warranty:
  • Improper handling, neglect or failure to operate the unit in compliance with the instructions given in user manual;
  • Connection or operation in any way that does not comply with the technical or safely regulations applicable in the country where the product is used;
  • Repairs or modifications by anyone other than authorized PJB service agent;
  • Speakers are not covered for damages caused by incorrect connection, or when powered beyond the limit described in the user manual.
  • Manufacturing defects are typically detected during early usage.

    In all warranty issues your first line of communication should be to the retailer you purchased from, even if you have purchased product from an online source.

    When a local distributor is available, customer who prefers to purchase across country online may be required to pay shipping charges to retailer in order to obtain service.

    Warranty term/condition might be different depending on the country you are in. Please contact your local distributor for details.

    Further questions, please contact PJB by email, or call (855) 227-7510.
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