Back Panel, Power Engine Specifications

POWER SWITCH with built-in status indicator

Turns on the Power Engine when right side is pushed in and will glow red when engaged. Be sure power amp connections are secure and check the AC power source prior to engaging the Power Switch.

BACK PANEL

1/4” INPUT*

Receives unbalanced input signals.

XLR INPUT*

3-pin female XLR balanced input for professional applications. Reduces hum and allows use of longer cables without signal degradation.

*NOTE: If you have the choice, we recommend utilizing the XLR input of the Power Engine. Additionally, do not use both inputs at the same time.

GROUND LIFT

Disconnects (isolates) the ground circuits between the XLR Output of the Power Engine and the mixer to eliminate hum caused by ground loops. We recommend starting with the ground lifted. If necessary, connect the ground by pushing the button in.

XLR OUTPUT

3-pin female XLR balanced output for professional applications to connect to a studio mixer or P.A. Reduces hum and allows use of longer cables without signal degradation. It is directly connected to the Input but unaffected by the Level control(s). If you require more wattage for large venues, our XLR Output allows you to endlessly chain Power Engines together.

PARALLEL SPEAKER OUTPUTS

1/4” speaker jacks. NOTE: Turn off Power Engine before connecting your speakers.

For Power Engine 300: Do not use speakers rated at less than 4 Ohms, as it could cause undesirable distortion or potentially overheat the Power Engine. Speakers rated at a higher value will result in loss of power.

For Power Engine 400: Do not use speakers rated at less than 8 Ohms, as it could cause undesirable distortion or potentially overheat the Power Engine. Speakers rated at a higher value will result in loss of power. NOTE: You cannot run the Power Engine 400 in bridge/mono mode. If you require less wattage for smaller venues, you can choose to use only one side.

POWER ENGINE SPECIFICATIONS

Note: With on-going product development and improvements, specifications and/or

the cosmetic appearance of this unit may change without prior notice.

Model Number:	PW300	PW400
XLR Input Impedance:	> 3.3KOhm	> 3.3KOhm
1/4” Input Impedance:	> 10KOhm	> 10KOhm
Nominal Input Level:	-10dBm	-10dBm
Optimal Output Load:	4 Ohms	8 Ohms per side
RMS Continuous Power Output: 300W RMS @ 4 min load		200W RMS @ 8 min/side
	200W RMS @ 8	200W RMS @ 8 min/side
	150W RMS @ 16	150W RMS @ 16
XLR Output Level:	same as input	same as input

AC Input Power (factory set):	100V, 117V, 230V, 240V
Cycles:	50/60 Hz

NOTE: Each unit constructed for specific voltages. AC power cannot be switched.

Unit Dimensions:	17”w x 3.5”h x 10”d
Overall (with ears, feet and handles):	19”w x 3.8125”h x 11.5”d
Weight:	Power Engine 300:	22.3 lbs.
	Power Engine 400:	26.25 lbs.

Optional Speaker Cabinets:

•4x12TM 4x12, 320-watt, 8-Ohm closed-back cabinet with special design Celestion® speakers, available with black grill and silver piping or wheat grill and white piping. Either style is available in slant or straight front formats.

•B410 4x10, 400-watt, 8-Ohm rear-vented bass cabinet with cast-frame, custom-designed speakers; chrome-plated steel grill.

•B115 1x15, 300-watt, 8-Ohm bass cabinet with custom-designed Eminence® Neodymium speaker; chrome plated steel grill.

Replacement parts (i.e., knobs, logo plate, handles, ears, hardware, etc.) are avail- able through your authorized dealer, distributor or directly from Tech 21.