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.

Features:

• Class A pre-amplifier with a Class D power amplifier
• Puts out 300 watts into its own speakers and up to 500 watts when connected to an external cabinet
• 8 Ohm Internal Speaker Impedance
• Four 5” speakers
• Weighs in under 35 lbs

Specifications:

•  Amplifier Type: Class A pre-amplifier. Class D power amplifier with digital switch-mode power supply.
•  Power output: 250W at 8 Ohms / 450W at 4 Ohms (MAX transient peak output 400 watts into 8 ohms / 800 watts into 4 ohms).
•  Signal to Noise Ratio: =85 dB(A) (EQ off, Volume on Full)
•  Passive Input Impedance: >2MO/22pF
•  Active Input Impedance: >100KO/22pF
•  Line Input: >75KO:
•  Pre- Amp Line Out: < 2KO
•  Bal. Out: <200O
•  Passive Input Levels: 10mV-1.5V
•  Active Input Levels: 20mV-4.5V
•  Pre-Amp Line Out: 1.2V
•  Balanced Line Out: Typical 500mV
•  Protection Circuits:
• - AC line filter.
• - Loudspeaker Short-Circuit Protection.
•  Computer Optimized Vented Enclosure: Increased bass output with reduced cone excursion.
•  Speaker Frequency Response: 35Hz–15KHz
•  Speaker Compliment: 4 x 5inch proprietary PJB, extended-range drivers
•  Speaker Sensitivity:</v> 93dB/W/M
•  Internal Speaker Impedance: 8 Ohms
•  Dimensions: (WxHxD): 14.2x14.3x13.2 inch
•  Weight: 31 lb
•  Accessories:
• - Detachable IEC 6 ft AC Power Cord
• - Protective slip-on cover